Site visit done by: Sumit Kumar Gautam, Naveen Kumar, Ridhima Gupta
Date of visit: 9 August, 2017
Scale of service: (Melaka Tengah and Western of Alor Gajah) 300,000 PE
| Area: 11.4 Ha
Outlet/end products: Effluent in Sg. Ayer Batu river and Dried sludge in trenching site
Opex of the plant: 200,000 RM per annum (INR 32,00,000)
Sludge treatment time (approx.): 8 hrs
|This centralised sludge treatment facility is highly mechanised plant as 50% of the opex is towards the electricity bills (equipped with 119 pumps). The plant treats the fecal sludge removed from septic tanks and also sludge from small sewage treatment plants. The plant dpeloys 3 feed steps biological scrubbers to remove the odour. The sludge is thickened to at least 20% dried sludge in dewatering units (mechanical compressors) after mixing the polymers and coagulants to enhance the solid recovery.
As shown in below schematics, the tankered sludge is first passed through two coarse screens. The scum collection tank removes any oil and grease which is pumped to sand bed. The screened sludge is temporarily stored in sludge holding tank.
|The system is expected to provide treated water that would be used for horticulture purposes to maintain green area of 0.5 Acres. This would help in saving about 8000 litres of fresh water. Water quality report at the inlet and outlet of the DWWTs will be furnished in due course.
Mr. James Oliver Warren