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Modular STP installation for hotel wastewater

100 KLD MBBR Based Compact Modular STP Installation in Nepal for Hotel Wastewater Treatment

Introduction

In modern urban infrastructure, proper wastewater management has become one of the most critical environmental responsibilities for hotels, commercial buildings, hospitals, and residential complexes. With increasing population, rapid urbanization, and growing environmental regulations, the discharge of untreated sewage is no longer acceptable. Hospitality properties in particular generate a large quantity of wastewater every day due to guest usage, kitchen operations, laundry, housekeeping, and other service activities. Without a proper sewage treatment system, this wastewater can create serious environmental pollution, health hazards, and legal complications.

In cities like Kathmandu, Nepal, where water scarcity and environmental concerns are major issues, the importance of installing an efficient Sewage Treatment Plant (STP) becomes even greater. A modern hotel located in the central area of Kathmandu required a reliable and space-saving sewage treatment solution capable of handling large volumes of wastewater while meeting strict environmental discharge standards.

To solve this problem, a 100 KLD Compact Modular Sewage Treatment Plant based on MBBR (Moving Bed Biofilm Reactor) technology was designed and installed. The system was engineered to treat the entire wastewater generated by the hotel and to produce treated water suitable for reuse in non-potable applications such as flushing, gardening, and cooling tower make-up water.

The installation of this STP has significantly reduced freshwater consumption, minimized environmental impact, and ensured full compliance with pollution control regulations. This article provides a detailed explanation of the project, including background, wastewater challenges, design approach, treatment technology, plant configuration, execution process, and performance results.


Project Overview – 100 KLD Compact Modular STP

Project Overview – 100 KLD Compact Modular STP
Project Overview – 100 KLD Compact Modular STP

The installed sewage treatment plant has a capacity of 100 kilolitres per day, which means it can treat up to 100,000 litres of sewage every day. The plant is based on advanced biological treatment technology using MBBR media, which provides high efficiency in removing organic pollutants, suspended solids, and harmful bacteria.

Basic Project Details

ParameterDetails
Plant Capacity100 KLD
TechnologyMBBR (Moving Bed Biofilm Reactor)
Plant TypeCompact Modular STP
LocationKathmandu, Nepal
ApplicationHotel Sewage Treatment
Inlet BOD200 – 250 mg/L
Inlet COD400 – 500 mg/L
Inlet TSS200 – 250 mg/L
Outlet BOD< 10 mg/L
Outlet COD< 50 mg/L
Outlet TSS< 10 mg/L
DisinfectionUV + Chlorination
Media Filling Ratio50%
HRT12 – 16 Hours
Treated Water UseFlushing, Gardening, Cooling Tower

The plant was designed to operate continuously with minimal manual intervention and to maintain consistent treated water quality even during load fluctuations.


Importance of Sewage Treatment for Hotels

Hotels are among the largest generators of wastewater in urban areas. Every guest room, kitchen, laundry unit, and washroom contributes to the total sewage load. If this wastewater is discharged without treatment, it can pollute rivers, groundwater, and drainage systems.

Typical sources of wastewater in hotels include:

  • Toilets and bathrooms
  • Kitchen and restaurant drains
  • Laundry discharge
  • Floor cleaning water
  • Swimming pool backwash
  • Cooling tower blowdown

Untreated sewage contains high levels of:

  • Organic matter (BOD & COD)
  • Suspended solids
  • Oil and grease
  • Detergents
  • Pathogens and bacteria

Because of these contaminants, untreated wastewater cannot be discharged directly into drains or water bodies. Environmental authorities require proper treatment before disposal.

Installing an STP provides several benefits:

  • Compliance with environmental rules
  • Reduction in freshwater usage
  • Safe disposal of sewage
  • Reuse of treated water
  • Cost savings
  • Improved sustainability

For hospitality properties, sewage treatment is not only a legal requirement but also an important part of responsible operation.


Background of the Project in Kathmandu

The hotel where the STP was installed is a large hospitality property located in Kathmandu. The facility includes multiple guest rooms, restaurants, banquet halls, spa, gym, laundry, and staff areas. Because of continuous operation, the hotel produces a large amount of wastewater every day.

The management required a sewage treatment system that could:

  • Treat complete daily wastewater
  • Fit in limited space
  • Work automatically
  • Produce high-quality treated water
  • Allow reuse of water
  • Meet Nepal environmental standards

Due to limited land area available for utilities, a conventional large STP could not be installed. Therefore, a compact modular system was required.

After site inspection and wastewater analysis, it was decided to install a 100 KLD MBBR based Compact STP, which offers high efficiency in a small footprint.


Wastewater Characteristics at the Site

Before designing the plant, the wastewater quality was studied. The typical sewage generated at the hotel had the following characteristics:

ParameterValue
BOD200 – 250 mg/L
COD400 – 500 mg/L
TSS200 – 250 mg/L
pH6.5 – 7.5
Oil & GreaseModerate
ColiformHigh
TurbidityHigh

This wastewater required biological treatment to remove organic matter and pathogens.


Challenges Identified During Planning

1. High Daily Sewage Generation

The hotel produces wastewater throughout the day from different sources. The flow is not constant. In the morning and evening, the load is higher, while at night it is lower.

The treatment system had to handle:

  • Variable flow
  • Variable organic load
  • Continuous operation

This required a technology that can work efficiently under changing conditions.


2. Space Limitation

Urban hotels usually have limited space for utility installations. The available area for the STP was small, so the plant had to be compact.

Requirements:

  • Minimum footprint
  • Modular design
  • Easy installation
  • Vertical arrangement if needed

Because of these conditions, conventional large STP designs were not suitable.


3. Strict Environmental Regulations

Nepal environmental rules require treated sewage to meet limits for:

  • BOD
  • COD
  • TSS
  • Coliform bacteria
  • pH

The plant had to produce treated water that meets discharge standards and is safe for reuse.


4. Water Scarcity in Kathmandu

Kathmandu often faces shortage of freshwater, especially during dry seasons. Hotels must buy water from tankers, which increases operating cost.

By installing an STP, treated water can be reused for:

  • Toilet flushing
  • Gardening
  • Cooling tower
  • Cleaning

This reduces freshwater consumption.


5. Need for Easy Operation

Hotel staff cannot spend too much time operating the STP. The system had to be:

  • Automatic
  • Reliable
  • Low maintenance
  • Easy to monitor

A PLC-based control system was selected to make operation simple.


6. Requirement of Odor-Free Operation

Hotels cannot allow bad smell from sewage treatment.

The plant had to include:

  • Proper aeration
  • Covered tanks
  • Good ventilation

This ensured clean operation.


Selection of Treatment Technology

Different STP technologies were considered, such as:

  • Conventional Activated Sludge
  • SBR
  • MBR
  • MBBR

After comparison, MBBR was selected because:

  • Compact size
  • High efficiency
  • Stable performance
  • Low sludge
  • Easy maintenance
  • Suitable for hotels

This technology allows high treatment efficiency in small space.


Proposed Solution – 100 KLD MBBR Compact Modular STP

100 kld stp plant GA Drawing
100 kld stp plant GA Drawing

The final design included:

  • Screening chamber
  • Equalization tank
  • MBBR reactor
  • Secondary clarifier
  • Pressure filter
  • Disinfection system
  • Treated water tank
  • Sludge handling

The plant was designed in modular form so that installation could be done easily inside the available space.


MBBR Based 100 KLD Compact Modular STP – Technology, Design and Engineering Details

Introduction to MBBR Technology in Sewage Treatment Plants

MBBR Based 100 KLD Compact Modular STP – Technology, Design and Engineering Details
MBBR Based 100 KLD Compact Modular STP – Technology, Design and Engineering Details

The Moving Bed Biofilm Reactor (MBBR) process is one of the most advanced and efficient biological wastewater treatment technologies used in modern Sewage Treatment Plants. It combines the advantages of the activated sludge process and fixed film reactors without the disadvantages of either system. Because of its compact size, high treatment efficiency, and stable performance, MBBR technology is widely used in hotels, hospitals, residential societies, commercial buildings, and industrial facilities.

In the 100 KLD STP installed in Kathmandu, MBBR technology was selected to ensure consistent treatment performance even under fluctuating wastewater load conditions. Hotels experience variations in occupancy, kitchen usage, laundry discharge, and housekeeping operations, which makes the wastewater flow irregular. MBBR systems are ideal for such situations because they maintain high biological activity inside the reactor.

The MBBR reactor contains specially designed plastic carrier media that provide a large surface area for the growth of beneficial microorganisms. These microorganisms form a biofilm on the surface of the media and break down organic pollutants present in sewage.

Because the media moves freely inside the aerated tank, the process is called Moving Bed Biofilm Reactor.


Why MBBR Was Selected for This Project

Several treatment technologies were evaluated before finalizing the design. The following factors were considered:

  • Available space for installation
  • Required treatment efficiency
  • Ease of operation
  • Energy consumption
  • Maintenance requirement
  • Stability during load variation

After detailed comparison, MBBR was selected because it offers the following advantages:

1. Compact Size

MBBR reactors require smaller tank volume compared to conventional systems because the biofilm carriers provide a very large surface area for bacterial growth.

2. High Treatment Efficiency

The system can remove more than 95% of organic pollutants, which ensures treated water meets environmental standards.

3. Stable Operation

Hotels generate different amounts of sewage at different times. MBBR can handle load variations without affecting performance.

4. Low Sludge Generation

Compared to activated sludge systems, MBBR produces less excess sludge, reducing disposal cost.

5. Easy Expansion

If future capacity increases, additional media or modules can be added without major civil work.

6. Low Maintenance

The system does not require complicated sludge recycling control, making it easier for hotel staff to operate.

Because of these advantages, MBBR technology was the best choice for the 100 KLD compact STP.


Design Basis for 100 KLD STP

Design Inlet Water Quality
Design Inlet Water Quality

The plant was designed based on the expected wastewater generation and its characteristics.

Design Capacity

100 KLD means:

100,000 litres per day

Average flow per hour:

100,000 / 24 ≈ 4.2 KL per hour

The system was designed with extra safety margin to handle peak flow.


Design Inlet Water Quality

ParameterValue
BOD200 – 250 mg/L
COD400 – 500 mg/L
TSS200 – 250 mg/L
pH6.5 – 7.5
Oil & GreaseModerate
ColiformHigh
TurbidityHigh

The plant was designed to reduce these values to safe limits.


Required Outlet Quality

ParameterTarget
BOD< 10 mg/L
COD< 50 mg/L
TSS< 10 mg/L
pH6.5 – 8.5
ColiformNon-detectable
Turbidity< 5 NTU

This quality is suitable for reuse.


Hydraulic Retention Time (HRT)

HRT is the time wastewater stays in the system.

For MBBR STP:

12 – 16 hours HRT was selected.

This ensures proper biological treatment.


MBBR Media Design

The performance of MBBR depends on media.

High-density polyethylene media was used.

Media Specifications

ParameterValue
MaterialHDPE
ShapeCylindrical
Specific surface areaHigh
Fill ratio50%
DensityNear water

Media provides surface for bacteria.

Higher surface area means better treatment.


Dissolved Oxygen Requirement

Bacteria need oxygen.

Air is supplied by blowers.

Required DO level:

2 mg/L

Fine bubble diffusers used.

This improves efficiency.


Tank Design

The STP includes several tanks:

  • Collection tank
  • Equalization tank
  • MBBR reactor
  • Clarifier
  • Filter feed tank
  • Treated water tank
  • Sludge tank

All tanks designed for compact layout.

Material used:

  • RCC
  • FRP
  • MS epoxy coated

Equalization Tank Design

Purpose:

  • Store wastewater
  • Balance flow
  • Prevent shock load

Features:

  • Air diffuser
  • Mixer
  • Level control

This ensures uniform flow to MBBR.


MBBR Reactor Design

Main treatment tank.

Contains:

  • Bio media
  • Diffuser
  • Air blower

Media fill = 50%

Aeration keeps media moving.

Bacteria grow on media.

Organic matter removed.


Secondary Clarifier Design

Purpose:

  • Separate solids
  • Clear water

Features:

  • Tube settler
  • Sludge hopper
  • Outlet weir

Settled sludge removed.

Clear water goes to filter.


Pressure Filter Design

Filter removes fine particles.

Dual media used:

  • Sand
  • Anthracite

Backwash system included.

Makes water clear.


Disinfection System Design

Two methods used:

  1. UV
  2. Chlorine

UV kills bacteria.

Chlorine gives residual protection.

Water safe for reuse.


Treated Water Storage Tank

Stores treated water.

From here water used for:

  • Flushing
  • Gardening
  • Cooling tower

Pump provided.


Sludge Handling System

Sludge collected from clarifier.

Sent to drying bed.

Water removed.

Dry sludge disposed.

Low sludge generation due to MBBR.


Automation and Control Panel

The plant includes PLC panel.

Functions:

  • Pump control
  • Blower control
  • Alarm system
  • Level sensor
  • Timer

Advantages:

  • Easy operation
  • Safe operation
  • Low manpower

Power Consumption

Approx power for 100 KLD:

8 – 12 kWh per day

Main load:

  • Blower
  • Pump
  • UV
  • Panel

Low energy design used.


Construction Type

Combination of:

  • Civil tanks
  • FRP units
  • MS coated tanks

Selected based on space.


Compact Modular Design Advantage

  • Fits in small space
  • Easy installation
  • Easy expansion
  • Less civil work

Ideal for hotels.


Process Flow and Installation of 100 KLD Compact Modular STP

Introduction

After finalizing the design and technology for the 100 KLD Sewage Treatment Plant, the next step was the execution of the project. This included civil construction, equipment manufacturing, supply, installation, piping, electrical work, and commissioning. Because the project was located in Kathmandu and the installation area inside the hotel premises was limited, the system had to be installed in a compact modular format without disturbing hotel operations.

The STP was designed to follow a multi-stage treatment process so that sewage can be converted into clean reusable water. Each stage of the plant removes specific impurities such as solid waste, organic matter, suspended particles, and harmful bacteria.

The treatment process of this STP includes:

  1. Screening Chamber
  2. Equalization Tank
  3. MBBR Biological Reactor
  4. Secondary Clarifier
  5. Pressure Sand Filter
  6. Activated Carbon / Dual Media Filter
  7. Disinfection System
  8. Treated Water Tank
  9. Sludge Handling System

Each stage plays an important role in achieving high-quality treated water.


Complete Process Flow of 100 KLD STP

Incoming sewage → Screening → Equalization → MBBR Reactor → Clarifier → Filter → Disinfection → Treated Water Tank → Reuse

Sludge → Sludge Tank → Drying Bed

This flow ensures removal of organic load, solids, and bacteria.


Stage 1 – Screening Chamber

The first step in sewage treatment is removal of large solid materials. Wastewater coming from toilets, kitchen, laundry, and washrooms may contain plastic, cloth, paper, food particles, and other solid waste. If these materials enter pumps and reactors, they can damage equipment.

Therefore, a screening chamber was installed at the inlet of the STP.

Functions of Screening

  • Removes large particles
  • Protects pumps
  • Prevents choking
  • Improves efficiency

A manual bar screen was used for easy cleaning.

The collected waste is removed daily.


Stage 2 – Equalization Tank

After screening, sewage flows into the equalization tank. The purpose of this tank is to collect wastewater and maintain a uniform flow to the treatment system.

Hotels do not generate wastewater at a constant rate. In the morning and evening, the flow is high, while at night it is low. Without equalization, the treatment plant would receive sudden load changes, which can affect biological activity.

Functions of Equalization Tank

  • Stores incoming sewage
  • Balances flow
  • Prevents shock load
  • Maintains constant feed
  • Reduces odor

The tank is provided with air diffusers to keep wastewater mixed and prevent settling.

A transfer pump sends wastewater to the MBBR reactor at a controlled rate.


Stage 3 – MBBR Biological Reactor

The MBBR reactor is the main treatment unit of the STP. In this tank, biological treatment takes place with the help of microorganisms.

Special plastic media is filled inside the reactor. These media pieces float in the tank and provide a large surface area for bacteria to grow.

Air is supplied from blowers through fine bubble diffusers. The air performs two functions:

  • Provides oxygen for bacteria
  • Keeps media in motion

Because the media moves continuously, the process is called Moving Bed Biofilm Reactor.

What Happens in MBBR Tank

  • Bacteria grow on media surface
  • Organic waste is consumed
  • BOD decreases
  • COD decreases
  • Smell reduces
  • Sewage becomes clear

The reactor was designed with 50% media filling to ensure high efficiency.

This stage removes most of the pollution.


Stage 4 – Secondary Clarifier

After biological treatment, the water flows into the clarifier tank. The purpose of this tank is to separate solid particles from water.

During biological treatment, some biomass and suspended solids are formed. These solids must be removed before filtration.

Functions of Clarifier

  • Settles suspended solids
  • Produces clear water
  • Collects sludge
  • Improves filter performance

A tube settler was installed inside the clarifier to increase settling efficiency.

Sludge settles at the bottom and is removed periodically.

Clear water flows to the filter.


Stage 5 – Pressure Sand Filter

Even after clarification, small particles may remain in the water. To remove these particles, a pressure sand filter was installed.

This filter contains layers of sand and gravel. Water passes through the media and suspended particles get trapped.

Benefits of Sand Filter

  • Removes fine solids
  • Improves clarity
  • Reduces turbidity
  • Protects next stage

Backwash system is provided to clean the filter.


Stage 6 – Activated Carbon / Dual Media Filter

After sand filtration, water enters the carbon filter. This filter removes color, odor, and dissolved organic impurities.

Activated carbon has high adsorption capacity.

Functions

  • Removes smell
  • Removes color
  • Improves taste
  • Removes chemicals

This stage produces polished water.


Stage 7 – Disinfection System

Even after filtration, bacteria and viruses may remain in water. Therefore, a disinfection system is required.

Two methods were used:

UV Disinfection

Ultraviolet light kills bacteria instantly.

Advantages:

  • No chemical taste
  • No residue
  • Fast action

Chlorination

Chlorine is added in small quantity.

Purpose:

  • Residual protection
  • Prevent bacteria growth in tank

After disinfection, water becomes safe for reuse.


Stage 8 – Treated Water Tank

Treated water is stored in a tank.

From here, water is reused for:

  • Toilet flushing
  • Gardening
  • Cooling tower
  • Cleaning
  • Washing

This reduces freshwater consumption.

A pump sends water to reuse lines.


Stage 9 – Sludge Handling System

Sludge collected from clarifier must be removed.

Sludge is sent to sludge tank.

From sludge tank it goes to drying bed.

Water evaporates.

Dry sludge disposed safely.

MBBR produces less sludge compared to other systems.


Installation Work at Site

The installation was done in phases.

Step 1 – Site Inspection

Engineers visited the site.

Space measured.

Wastewater checked.

Layout prepared.


Step 2 – Design and Drawing

Piping drawing made.

Tank size calculated.

Equipment selected.

Panel designed.

Approved by client.


Step 3 – Civil Construction

Tanks constructed.

Foundation made.

Pipe trench made.

Supports installed.

Civil work completed first.


Step 4 – Equipment Supply

Equipment supplied:

  • Blowers
  • Pumps
  • Filters
  • Media
  • Diffusers
  • Panel
  • UV

All equipment tested.


Step 5 – Mechanical Installation

Piping done.

Pump installed.

Blower installed.

Media filled.

Filter connected.


Step 6 – Electrical Work

Panel installed.

Cable connected.

Sensors fitted.

Auto control set.


Step 7 – Trial Run

Water filled.

Air started.

Pump started.

Media movement checked.

Leak checked.

System tested.


Step 8 – Biofilm Development

Biological treatment needs bacteria.

Initial seeding done.

Air supplied.

After few days biofilm formed.

Plant started working.


Challenges During Installation

Space limitation

Solved by modular design.

Transport to Kathmandu

Handled by planning.

Cold weather

Start-up adjusted.

Load variation

MBBR stable.

Odor control

Good aeration used.


Successful Commissioning

After testing, plant started running.

Output water tested.

Results within limit.

Plant handed over.

Training given.


Final Performance, Benefits and Results of 100 KLD Compact Modular STP

Introduction

After successful installation and commissioning of the 100 KLD MBBR based Sewage Treatment Plant, the system was tested under actual operating conditions. The objective of the plant was to treat the entire sewage generated by the hotel and produce high-quality treated water suitable for reuse. The plant was required to perform continuously, handle load variations, and meet environmental discharge standards without causing odor or operational problems.

During the trial run and regular operation, the STP showed stable performance and achieved excellent treatment efficiency. The treated water quality met the required limits, allowing safe reuse inside the premises. This resulted in significant savings in freshwater consumption and reduced environmental impact.

This section explains the performance results, water reuse data, environmental benefits, cost savings, maintenance requirements, and overall advantages of the installed system.


Performance Test Results of STP

After commissioning, wastewater samples were tested at inlet and outlet of the plant.

Inlet vs Outlet Quality

ParameterInletOutlet
BOD200 – 250 mg/L< 10 mg/L
COD400 – 500 mg/L< 50 mg/L
TSS200 – 250 mg/L< 10 mg/L
TurbidityHigh< 5 NTU
Oil & GreasePresentTrace
pH6.5 – 7.57 – 8
ColiformHighNil
OdorStrongNone
ColorDirtyClear

Result

  • Removal efficiency > 95%
  • Stable output
  • No smell
  • Safe for reuse

The plant successfully met discharge and reuse standards.


Daily Water Reuse from STP

One of the main purposes of installing the STP was to reuse treated water and reduce freshwater consumption.

Reuse Applications

UseWater Used per Day
Toilet flushing40 KL
Gardening25 KL
Cooling tower30 KL
Cleaning5 KL

Total reuse = 100 KL/day

This means the hotel saves 100,000 liters of fresh water every day.


Annual Water Saving

100 KL/day × 365 days

= 36,500 KL per year

This is a huge saving.

Because water cost is high, the STP pays back quickly.


Environmental Benefits of STP

Installing a sewage treatment plant provides many environmental advantages.

1. Prevents Water Pollution

Untreated sewage pollutes rivers and groundwater.

STP removes pollutants.

Environment stays clean.


2. Reduces Freshwater Use

Reusing treated water reduces demand.

Helps in water shortage areas.

Important for cities like Kathmandu.


3. Safe Disposal of Wastewater

Treated water meets standards.

No harm to soil or drains.

No legal problems.


4. Low Sludge Generation

MBBR produces less sludge.

Easy disposal.

Low cost.


5. Odor-Free Operation

Proper aeration prevents smell.

Suitable for hotel use.


6. Energy Efficient System

Compact design uses less power.

Blower and pump optimized.

Low running cost.


Cost Saving After STP Installation

Hotels usually buy water from tankers.

Cost per KL can be high.

By reusing 100 KL/day:

Saving = tanker cost × 100 KL

Monthly saving is large.

STP investment recovered in few years.


Maintenance Requirement of 100 KLD STP

The plant is designed for easy maintenance.

Daily Checks

  • Check blower
  • Check pump
  • Check water level
  • Check odor

Weekly Checks

  • Clean screen
  • Check filter pressure
  • Check chlorine
  • Check air supply

Monthly Checks

  • Backwash filter
  • Check media movement
  • Check panel
  • Remove sludge

Yearly Maintenance

  • UV lamp change
  • Pump service
  • Blower service
  • Sensor check

Proper maintenance keeps plant efficient.


Advantages of MBBR Based STP

MBBR system has many advantages compared to old methods.

High Efficiency

Removes BOD, COD, TSS effectively.


Compact Size

Needs less space.

Good for hotels.


Stable Operation

Works even if load changes.


Easy Operation

No complex control.


Low Sludge

Less disposal cost.


Expandable

More media can be added.


Long Life

Strong media lasts many years.


Why Compact Modular STP is Best for Hotels

Hotels need:

  • Small size
  • Clean operation
  • Low noise
  • Low smell
  • Easy maintenance

Modular STP provides all.

Can be installed in:

  • Basement
  • Utility area
  • Terrace
  • Outdoor plant room

Safety Features in Installed STP

  • Auto panel
  • Overload protection
  • Level sensor
  • Alarm system
  • Emergency stop
  • Proper earthing

Ensures safe operation.


Training Given to Staff

After commissioning, staff training done.

Training included:

  • How to start plant
  • How to stop plant
  • Cleaning screen
  • Backwash filter
  • Sludge removal
  • Panel operation

This helps smooth operation.


Future Expansion Possibility

If hotel capacity increases, STP can be expanded.

Options:

  • Add media
  • Add tank
  • Add filter
  • Add module

Modular design allows upgrade.


Common Questions About STP

What is STP?

Sewage Treatment Plant treats wastewater.


Why hotel needs STP?

To meet rules and reuse water.


What is MBBR?

Biological treatment using moving media.


Is treated water safe?

Yes, for flushing and gardening.


Does STP smell?

No, if designed properly.


How much power needed?

Low power for 100 KLD.


How long life?

15–20 years with maintenance.


Conclusion

The installation of the 100 KLD MBBR based Compact Modular Sewage Treatment Plant in Kathmandu is a successful example of modern wastewater treatment for hospitality projects. The plant was designed to handle the complete sewage load generated by the hotel while operating in a limited space and maintaining high treatment efficiency.

With the use of advanced MBBR technology, the system provides stable performance, low maintenance, and excellent treated water quality. The treated water is reused for flushing, gardening, and cooling tower applications, which significantly reduces freshwater consumption and operating cost.

The project demonstrates that compact modular STP systems are the best solution for hotels, commercial buildings, and residential complexes where space is limited but reliable wastewater treatment is required. By installing such systems, properties can meet environmental regulations, save water, reduce expenses, and contribute to sustainable development.

Frequently Asked Questions (FAQs)

The FAQs below answer the most common questions related to MBBR-based Sewage Treatment Plants for hotels and hospitality projects, and are written in an SEO-friendly format for better visibility in Google and AI search results.

Q1. What is MBBR technology and why is it preferred for hotel STP systems?

MBBR (Moving Bed Biofilm Reactor) is an advanced biological wastewater treatment process in which specially designed plastic media carriers move freely inside an aeration tank. These carriers provide a large surface area for beneficial microorganisms that break down organic waste present in sewage.
This technology is widely used in hotels because it offers:
Compact design suitable for limited space
High treatment efficiency
Stable performance during load variations
Low sludge production
Simple operation and maintenance
Lower operating cost compared to conventional systems
Due to these advantages, MBBR is one of the most reliable technologies for hotel wastewater treatment plants.

Q2. What is the treatment capacity of the STP installed at Lemon Tree Premier Hotel, Kathmandu?

The sewage treatment plant installed by V Aqua has a total design capacity of 100 KLD (Kilolitres per day), which means the system can treat up to 100,000 litres of wastewater daily.
This capacity is sufficient to manage sewage generated from:
Guest rooms and bathrooms
Hotel kitchen and restaurant
Laundry operations
Housekeeping activities
Staff facilities
The plant is designed to handle peak load conditions without affecting treatment quality.

Q3. What is the quality of treated water produced by the 100 KLD MBBR STP?

The compact modular MBBR system produces high-quality treated water suitable for reuse. Typical outlet parameters are:
BOD < 10 mg/L
COD < 50 mg/L
TSS < 10 mg/L
Coliform – Nil after UV disinfection
This treated water quality complies with Nepal Environmental Protection standards and also meets international reuse guidelines for non-drinking applications.

Q4. How is the treated water reused in the hotel?

The treated wastewater is reused within the hotel premises to reduce freshwater consumption. Common reuse applications include:
Toilet flushing systems
Landscape irrigation and gardening
Cooling tower make-up water
Floor washing and cleaning
Utility and maintenance use
With proper reuse planning, the hotel can save approximately 30,000 – 36,500 KL of fresh water every year, which significantly reduces water bills and environmental impact.

Q5. Can a compact modular STP be installed in hotels with limited space?

Yes, compact modular STP systems are specially designed for locations where space is restricted. These systems can be installed in:
Basement utility areas
Rooftop service zones
Mechanical plant rooms
Outdoor compact civil pits
The modular design allows future expansion by adding additional reactor tanks without major structural changes, making it ideal for growing hotels.

Q6. What maintenance is required for an MBBR-based STP?

The system is designed for low-maintenance and automated operation. A PLC-based control panel continuously monitors plant performance and provides alarms if any parameter goes out of range.
Typical maintenance schedule includes:
Daily visual inspection of tanks and pumps
Weekly check of blowers and dosing systems
Periodic backwashing of filters
UV lamp replacement after 8,000–10,000 hours
Sludge removal at regular intervals
V Aqua also offers Annual Maintenance Contract (AMC) services to ensure long-term smooth operation.

Q7. How does V Aqua STP help hotels meet Nepal environmental regulations?

V Aqua designs sewage treatment plants to meet or exceed the discharge limits defined under Nepal Environmental Protection Act (EPA) guidelines.
By installing a properly designed STP, hotels can:
Avoid pollution penalties
Maintain environmental compliance certificates
Meet government approval requirements
Improve sustainability rating
Demonstrate eco-friendly operations to guests
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Contact V Aqua Water Treatment Company

DetailInformation
Company NameV Aqua Water Treatment Company
Head OfficeDelhi, India
Websitewww.vaqua.in
Emailsales@vaqua.in
Phone / WhatsApp+91-9560654995, +91-7827654995
ProductsSTP (MBBR, SBR, MBR), ETP, WTP, RO Plants, ZLD Systems
Export MarketsIndia, Nepal, Bangladesh, Bhutan, Sri Lanka
CertificationsCertified Manufacturer

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