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Manufacturer of STP, ETP, Industrial RO, Sewage treatment plant in noida, delhi call-9650608473
Sewage treatment plant in noida,ETP, Industrial RO delhi call-9650608473

Contact Info

  • 0120-2350053
  • 91+ 9650608473
  • 91+ 9650795306
indian standards for sewage treatment plant, effluent discharge standards for sewage treatment plant in india, sewage treatment plant rules

What are the Government regulations for STP in India?

According to the CPCB's legislative regulations, numerous infrastructures such as apartments, commercial construction projects, educational institutions, townships, and area development projects that meet specified conditions must include sewage treatment plants.To ensure effective and safe operation of the machinery, the guideline regulations address factors such as STP site, STP technology to adopt, STP functioning, and STP maintenance.

The CPCB has established the following guidelines for STPs:

1. The Technology of STP

The approved STP technologies to go with are-

A. Activated Sludge Process(ASP) (only when above 500 KLD sewage is generated).

B. Membrane Bio Reactor(MBR)

C. Moving Bed Bio Reactor(MBBR)

2. STP Unit Requirements

Individual units in sewage treatment plants perform various sewage treatment procedures. The following are the units and their criteria in accordance with the guidelines.

S.No.

Unit

Activated Sludge Process(ASP)

Sequential Batch Reactor(SBR)

Membrane Bio Reactor(MBR)

Moving Bed Bio Reactor(MBBR)

1.

Equalization Tank

Minimum
Holding Period of 8
hours.

Same as ASP

Same as ASP

Same as ASP

2.

Anoxic Tank

Return activated sludge should be pumped to anoxic tank for de-nitrification.

Not required

Same as ASP

Same as ASP

3.

Aeration Tank

Dissolved Oxygen in an excess of 4 mg/L has to be maintained in the Aeration Tank.

Same as ASP

Same as ASP

Same as ASP

4.

Membrane Tank

Not required

Not required

Membranes should be replaced regularly as per its manufacturer’s specifications

Not required

5.

Sludge Holding Tank

Sludge holding should be mandatorily provided for holding excess sludge before its dewatering.

Same as ASP

Same as ASP

Same as ASP

6.

Final Treated Water Holding Tank

Capacity of the tank should be enough to hold water for 2 days minimum.

Same as ASP

Same as ASP

Same as ASP

7.

Sludge Drying Bed

Instead of sludge drying bed, horizontal centrifuge system should be used for >500KLD STPs.

For <500 KLD STPs, belt press or screw press system should be used.

Same as ASP

Same as ASP

Same as ASP

 

3. Mechanical Equipment Requirement for STP

The Bar Screen Chamber and Oil & Grease Chamber of STPs installed should have obvious and simple access.

In addition, the equipment should be submersible and easy to remove/dismantle anytime repair is required.To decrease noise pollution, STP air blowers should have vibration mounts and acoustic enclosures.

4. STP's location

STPs should be placed beneath driveways, play areas, or clubhouses, and far away from residential areas to avoid causing any inconvenience to residents.Furthermore, STP should not be installed in any building's basement. To reduce complications caused by rain flooding, odour, or sound, access to the STP room should be from the ground level or upper basement via well-designed pathways or headroom, rather than from the lowest basement.

5. Treated Sewage Standards

The treated sewage should meet the following standards.

S. No.

Parameter

Required Standards

1

pH

6.5-8.5

2

BOD(5th day)

<10mg/l

3

COD

<50mg/l

4

Suspended Solids

<10mg/l

5

Ammonical Nitrogen

<5mg/l

6

Total Nitrogen

<5mg/l

7

Fecal Coliform

<100 MPN/100 ml

6. Sensor installation guidelines

Sensors for monitoring sewage parameters such as BOD, COD, TSS, flow, and pH are required.The following are the CPCB's suggested sensor types and communication protocols.

 

Parameter

Measurement Type

Sensor Type

Communication protocol

 

 

pH

Inline

Ion Selective Glass Electrodes

RS 485 Communication with Modbus

 

 

TSS

Inline

Turbidity to TSS correlation with
Nephelometric technique

RS 485 Communication with Modbus

 

 

BOD

Inline

UV-Vis Spectrophotometry
& combustion(Double beam
with entire spectrum scanning

RS 485 Communication with Modbus

 

 

COD

Inline

UV-Vis Spectrophotometry
& combustion(Double beam
with entire spectrum scanning

RS 485 Communication with Modbus

 

 

Flow

Inline

Electromagnetic Flow Measurement

RS 485 Communication with Modbus

 

7. STP's Caution Board

At STP areas, proper cautionary signboards should be shown, and safety standards should be observed.For maintenance personnel and the general public, "Danger" Sign Boards should be put at the STP area.

At the taps providing sewage water, the phrase "water not appropriate for drinking" should also be marked.

8. Use of treated sewage

The treated water should be used for toilet flushing, which should be done with a dual plumbing system.

9. STP Modular Operations

STPs that operate in a modular manner should be developed/constructed in smaller units so that they can be used according to the load or occupancy of people. The occupancy in the early stages of major projects where a higher capacity of STPs is required is unable to meet the operational parameters of the STP. As a result, the element should be considered throughout the design phase.

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