Sustainable Wastewater Management in Sumedang: Design, Treatment Technologies, and Resource Recovery

Abstract

In 2022, Regency Sumedang has a population of 1,159,400 people with a 762 people/km² density. With the increasing population, the quantity of wastewater generated is also expected to rise. High COD and BOD parameters in wastewater indicate the need to be treated before being discharged into the receiving water bodies. Aligned with SDGs point 6, the Communal Wastewater Treatment Plant (WWTP) planning for four districts in Kabupaten Sumedang aims to improve water quality, sanitation, and adequate and equitable cleanliness. In the planning of the WWTP, calculations are conducted, including population projections for 20 years, water requirements, wastewater production, and dimensioning units. Based on the wastewater flow rate calculation in Kabupaten Sumedang, the planned WWTP capacity is determined to be 287 L/second. The treatment unit chosen is the biological unit due to the BOD/COD ratio, indicating a figure of 0.51. The selected technologies include Bar Screens, Grease Traps, Equalization Tanks, Rotating Biological Contactors (RBC), Aerobic biofilters, Clarifiers, Sludge Drying Beds, and Chlorination. The selection of these units is expected to remove BOD and COD parameters by up to 95% and enhance resource recovery efforts, where the sludge cake exiting the sludge treatment unit can be utilised as raw material or a new, more beneficial energy source.