Analisis Spasial dan Penerapan Metode AHP dalam Pengembangan Infrastruktur Publik untuk Pengelolaan Air Limbah Domestik di Kawasan Spesifik Perairan (Studi Kasus : Kelurahan Belawan Bahagia Kecamatan Medan Belawan)

Abstract

Sanitation problems in specific water areas are an issue of current concern. The provision of sanitation infrastructure, especially domestic wastewater, is one of the basic needs of society and has a strategic role in improving the quality of health and welfare of the community. Belawan Bahagia Sub-district is a water residential area with the densest population density in Medan Belawan District, namely 22,865 people per Km2. Belawan Bahagia Subdistrict, as a coastal residential area, is also an area with a very high level of tidal flood vulnerability. The intensity of tidal floods occurs twice every month. This research aims to determine appropriate domestic wastewater management technology in Belawan Bahagia Sub-district. Analysis was carried out based on technical, social, environmental, institutional and financial aspects using the Analytical Hierarchy Process (AHP) method. The results of the analysis are then integrated spatially based on the level of tidal flood vulnerability in each environment in Belawan Bahagia Sub-district. The research results show that floating pods technology and a dry toilet system with separate containers are the most suitable technologies to be implemented in Bahagia Sub-district with a score for floating pods of 0.845 and dry toilets with separate containers of 0.661. The factors that form the basis for selecting these two technologies are their ability to provide services and respond to weather conditions, namely tidal floods. Efficiency of raw materials and a good waste minimization concept are also considerations in selecting this technology. Biofiltration and Tripikon-S technology can only be applied in areas with a moderate level of vulnerability. Meanwhile, Septictank and Anaerobic Baffled Reactor (ABR) technology are alternative technologies that can only be applied in areas with a low level of vulnerability so they cannot be applied at all in Belawan Bahagia Sub-district.