I fully agree with the summing of the huge discussion by Sh Kapur (CSE) among the Sewerage/FSM Experts that we need to have the best of the following solution: -
1--For cities more than 10 lac ultimate design population (considering 30 years as design period), central sewerage system is ruled out unless and until our focus is augmentation of WWTP capacity including its rehabilitation and modification in treatment process to the extent possible. 
As for connecting the additional pockets to the existing sewer network, provisioning of additional STP /DEWATS is the solution.

To my mind de-centralized sewerage system is best solution keeping in mind the huge O & M cost of maintaining the Sewage Pumping Stations.
2--For small towns /cities with ultimate design population less than 1 lac which do not have ant WWTP. Presuming that all households except the slums/very poor households have working septic tanks with or without secondary treatment units (soakage well/soakage pit) --provision of FSTP with a proper coordinated system in place for collection of septage from each household periodically and its disposal only into the FSTP is the ideal solution. This can be executed over a period 9-12 months. 

Further I hope we all agree that an FSTP of this size would be affordable including CAPEX & OPEX (to be arranged by ULB/small town).


That's all from my side.

Thanking you all.

Mayor K Garg
Water Supply & Sanitation Expert

As a follow up to the Policy & Practice Forum 2023, last month at AAETI, an Informal Discussion Series was initiated to encourage learning and sharing.A lively discussion followed A summing up webinar is now slated for the topic of the discussion series 1 "Understanding Basics of FSTP and STP Treatment Systems – For Achieving Inclusive and Affordable Sanitation" To discuss what we know, identifying what more we need to know and do for achieving inclusive and affordable sanitation.
Date: May 31st, 2023
Timing: 14:30 – 16:30 Hrs (IST)

Kindly register and share with your peers. lnkd.in/dkBtRv76