Dear India Water Portal community,
GIZ, Deutsche Gesellschaft für Internationale Zusammenarbeit, together with a local NGO is preparing an adapted decentralized treatment concept for a project area of approximately 950 residents with a total domestic wastewater production of roughly 100 cubic meter per day which is discharging into a local pond (talab). A household survey, discharge measurements and hydrochemical analysis of the wastewater and the talab were already conducted.
The project is a pilot study for the implementation of the City Sanitation Plan (CSP) in the city of Raipur, Chhattisgarh. As the situation of untreated wastewater discharging into an urban waterbody which is used for bathing, cleaning of utensils and personal hygiene can be found all over India, the preparation is done in a sophisticated manner so it can be adapted in other Indian cities.
For the conceptual design I would like to get the experiences and lessons learned from the Indian Water Portal community to some of the following (tricky) questions to see how other projects/engineers tackled some of them:
- Do you know of a case study/project where a treatment unit was constructed adjacent to an urban water body and discharging into a stagnant water (eutrophication) body which is used for bathing?
- How can such a unit be integrated ecologically into the lake surroundings and be used as a educational interface?
- Which low tech treatment steps (e.g. rock filters, adsorption by different substrates/soils) could be used for the removal of phosphorus to minimize eutrophication effects, how are you experiences?
- Which soils (in India) are best suitable for the adsorption of phosphorus which could subsequently used as fertilizer?
- Which limits of pollutants (BOD, COD etc.), Indian guidelines should be used for the output of the treatment facility to a sensitive waterbody?
- What guideline should be used for the hydrochemical benchmark of such an urban waterbody?
- Could the washing of utensils and clothes, the personal hygiene which involves the use of phosphate containing soaps be moved from the pond to a community washing place?
Thank you very much for your support.
Warm regards,