PERFORMANCE EVALUATION OF SEWAGE TREATMENT PLANT BASED ON SBR AND MBBR TECHNOLOGY
Swati Agnihotri
School of Environment and Natural Resources, Doon University, Dehradun, Uttarakhand, India -248001 , IN
Surindra Suthar
School of Environment and Natural Resources, Doon University, Dehradun, Uttarakhand, India -248001 , IN
Abid Ali Khan
School of Environment and Natural Resources, Doon University, Dehradun, Uttarakhand, India -248001 , IN
Keywords: Wastewater; SBR; MBBR; Sewage treatment; Efficiency.
Abstract
A huge gap exists in developing countries in the collection and treatment of domestic wastewater. Despite having multiple wastewater treatment facilities, the discharge of pollutants is still being done into natural water bodies, as the treatment facilities often work below design standards, thus creating a negative impact on the environment. In this study, a performance assessment of SBR (Sequential Batch Reactor) and MBBR (Moving Bed Bio Reactor) based wastewater treatment plant in Delhi, Gurgaon and Ludhiana is done. These plants are designed and constructed with an aim to manage wastewater so as to minimize or remove organic matter, solids and other pollutants before it enters a water body. In the present study samples were collected at inlet and outlet of the sewage treatment plant, and analysed for various Physico-chemical Parameters of 3 STP’s namely STP at Behrampur, Gurgaon- 120 MLD, STP at Delhi Gymkhana Club200 KLD and STP at Village Balloke, Ludhiana- 105 KLD. The parameters were evaluated and compared with the Central Pollution Control Board (CPCB) General Standards. The performance of each STP was evaluated in terms of Removal/Reduction Efficiency and it was revealed from the performance study that efficiency of the three STP’s under study was higher with respect to removal of TSS (Total Suspended Solids) 92-96.5% , BOD (Biochemical Oxygen Demand) 90.5-95% and COD (Chemical Oxygen Demand) 89-92%. in contrast to the removal of TDS (Total Dissolved Solids) 30-46% which was quite low. In comparison with each other, out of the three STP’s , the STP located at Behrampur, Gurgaon based on SBR technology showed better results for the effluent, its reduction efficiency for BOD is 95% and is highest among the other two STP’s. Overloading of the plant beyond its design capacity and poor maintenance practices were identified to be the main causes for the poor performance of the plant at Village Balloke. Given the cost of running the plant, it is essential that improvements are made to increase the performance.
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