IS 5523 : 2019

Sewage Treatment — Guide for Selection of Treatment Type

WEF MOP 8
CurrentFrequently UsedCode of PracticeEnvironmental · Drainage, Sewerage and Sanitary Fittings
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Summary

IS 5523 guides selection of sewage treatment technology. SBR and MBBR are most popular in India (2024) for compact footprint and good effluent quality. CPCB BOD limit is <10 mg/L.

Guide for selecting appropriate sewage treatment process based on effluent requirements, population, and available land.

Key Values
CPCB BOD limit<10 mg/L
CPCB TSS limit<20 mg/L
SBR land0.1-0.2 m²/person
Practical Notes
! SBR/MBBR need 10x less land than oxidation ponds.
! Design for 20-year projected population.
! CPCB tightened standards to BOD<10, TSS<20.
Cross-Referenced Codes
IS 2065:1996Code of Practice for Plumbing Services
→
IS 10500:2012Drinking water specification (second revision...
→
sewage treatmentSTPwastewaterSBRMBBRactivated sludge