Perancangan Reaktor Biogas Berbasis Lumpur Tinja di Asrama Dinas Lingkungan Hidup Kecamatan Jagakarsa Kota Jakarta Selatan

Abstract

The inadequate sewage treatment capacity in Jakarta and the lack of public attention to proper sewage treatment are one of the problems faced today. The high population number results in an increase in waste produced by human activities, including faecal waste. This design was made with the aim of designing a faecal mud-based biogas reactor design for its use as an energy source for residents of the Asrama Dinas Lingkungan Hidup South Jakarta. The type of biogas reactor to be designed is selected using the Multi-criteria Decision Analysis (MCDA) selection method with selection criteria in the form of land area, construction costs, gas production, and service life. In the existing condition, the land area is 9 m x 5 m and the total production of sewage sludge for the residents of RT 1 RW 9 is 0.03704 m3/day, a fixed-domed reactor or concrete fixed dome tank is chosen to be designed at the design location. The selected biogas reactor with a capacity of 14 m3 can treat sewage sludge and produce biogas of 19647.25 kg/day. The results of the sewage sludge into biogas energy for cooking needs are expected to help the local people's economy. The high population of Jakarta residents results in high domestic waste generation as well. On the other hand, the capacity of the sewage treatment plant (IPLT) in Jakarta is inadequate and the level of public awareness of sewage treatment in accordance with the regulation is still lacking. This design is carried out to contribute to provide solutions to the problems. The solution offered is the design of a sewage sludge-based biogas reactor that can be used as an energy source for residents of the South Jakarta Environmental Agency Dormitory. At the beginning of the design, three alternative biogas reactor designs were determined. The selection of the most suitable reactor is carried out using the Multi-criteria Decision Analysis (MCDA) method with criteria related to the availability of space, construction costs, gas production, and service life. With the existing condition of residents of RT 01 RW 09 Asrama Dinas Lingkungan Hidup South Jakarta which has an available land area of 9 m x 5 m and a total production of 0.03704 m3/day of sewage sludge, the type of fixed-domed reactor or fixed-domed concrete tank was chosen to be designed in design location. The capacity of the selected reactor is 14 m3 and can treat sewage sludge by producing biogas of 19647.25 kg/day. In addition to reducing the amount of sewage sludge that is processed at the sewage treatment plant, the results of utilizing sewage sludge into biogas are expected to help the economy of the dormitory residents.