Detail Engineering Design (DED) Domestic Wastewater Distribution and Treatment System in Sampangan, Bendan Ngisor, Petompon, Gajahmungkur District

Abstract

Environmental sanitation is one of the programs in the International Sustainable Development Goals (SDGs) 2030. Semarang Mayor Regulation No. 42 of 2013 on Semarang City Wastewater Masterplan has classified the domestic wastewater management system into two types, off-site and on-site operations. Gajahmungkur district is included in the off-site system. Sampangan, Bendan Ngisor, and Petompon are part of Gajahmungkur district that directly bordered by Kaligarang river. Most residents dispose of greywater into water bodies. This paper aims to present the results of the Detail Engineering Design (DED) domestic wastewater distribution and treatment system. The method of sampling wastewater used SNI 6989: 59: 2008. Based on the results, TSS values 236 mg/L, COD 331 mg/L, and BOD 116 mg/L. This result shows that the domestic wastewater produced is still above the Minister of Environment & Forestry Regulation No. 68 of 2016. The installation of wastewater used for the Gajahmungkur district consists of Grit Chamber, Collecting Wells, Anaerobic Baffled Reactor, Settling Tank, and Chlorination Tank. The type of domestic wastewater distribution system is a shallow sewer. This plan is divided into 11 blocks and serves a population of 20, 097 people. The planned budget for the costs required to make this plan is IDR35.016.315.000, 00.