by Anggrika Riyanti (Thesis M.Sc Unesco-IHE, Delft, Netherland, 2015) Supervised by Ari Siswanto and M. Ridhah Taqwa

Sanitation in community of tidal lowlands area was poor. Major of households does not have sanitation facility for bathing, washing and toilets. Some of them still doing the activity in the Sekunder Pedesaan (SPD). Feses (blackwater) and wastewater from bathroom, kitchen and laundry (grey water) dispose directly into Sekunder Pedesaan (SPD) without treatment. This can cause degradation of river water. The purpose of this study is to determine sustainable and affordable sanitation system for tidal lowlands area and to obtain sanitation management with community involvement. This study use qualitative methods with case study in Mulya Sari and Banyu Urip village, Tanjung Lago, Banyuasin Regency, South Sumatera. Collecting data used observation, documentation, interiew and water sampling which was analyzed in a descriptive manner. Responden sample was taken by purposive with snowball sampling. Interview technic used in-depth interview. Determining the location and the sample collection of water technics with grab sampling refers to SNI 6989.57: 2008 and SNI 6989.59: 2008. Water sampling was done in two stages, namely the lowest tide and highest tide. Water sample analyze in Center for Environtmental Health Engineering and Disease Control Palembang (BTKLPP) Laboratory and Center for Health Laboratory Palembang.

Sanitation system being reviewed was water supply for MCK, black water treatment, grey water treatment, dan sewerage. Then Sanitation system reviewed based on affordability and sustainability aspects. The result showed that poor sanitation in Desa Mulya Sari dan Banyu Urip due to lack of people knowledge and understanding in managing sanitation. Lack of water supply caused 73-790 0 peOple used the river water for bathing, washing and toilets activity. Pit latrines, septic tanks were built yet qualified the health requirements by Ministry of Health. Waste water from bathroom, kitchen and laundry (grey water) discharged directly into the river or yard used open ground sewerage. This situation causes degradation of SPD water quality due to domestic waste water. The result of water quality analysis showed that there were parameters that exceeded the quality standard South Sumatra Governor Regulation No. 16 Year 2005 on River Water Quality that is DO, coliform, fecal coliform in the highest tide and BOD5, COD, fosfat in the lowest tide.

Evaluation of sanitation system based on affordability and sustainability aspects, the water supply system being selected from rain water harvesting is using plastic for rain water harvesting. Waste water treatment use on-site system, black water treatment with ferrosement septic tank, grey water treatment with constructed wetlands and sewerage using bamboo pipes. Community involvement is needed to reach sustainable sanitation. The result showed that the community has accepted to the sanitation system well. Management practices that can be applied are Community Led Total Sanitation (CLTS), pilot project, establishing local sanitation community and training in contruction, operation and maintainance.

Keywords : Sanitation system, Tidal lowlands, Sustainable