Government regulations for STP in India - Sewage Treatment Plant Manufacturers

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July 19, 2022by Netsol Water2

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.

Treated Sewage Standards by STP

The treated sewage by a sewage treatment plant 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 Ammoniacal Nitrogen <5mg/l
6 Total Nitrogen <5mg/l
7 Fecal Coliform <100 MPN/100 ml

CPCB New Norms for Treated Sewage Standards by STP

Which are the Indian standards for sewage disposal?

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

Sewage Treatment Plant Manufacturer

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)

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