Development of a septage management system and business model in Sawahlunto City (Indonesia)

Domestic wastewater management in Sawahlunto City is done by local system. About 75.5% of houses use septic tanks, 4.1% are discharged into drainage channels, 4.5% are discharged into rivers, 15.9% have unknown location of domestic waste disposal. This study used primary data obtained from distributing questionnaires to 100 respondents, interviews with stakeholders and field observations. Secondary data was obtained from related agencies. Evaluation of existing conditions through 5 aspects and determination of development strategy through SWOT analysis (Strengths, Weakness, Opportunities, Threats) and business model selection using business model canvas. The result obtained an average desludging production rate of 0.4 litres/person/day. About 64% of respondents stated that they have never drained their septic tanks and 56% of respondents did not know about septage treatment plants (IPLT). The SWOT analysis shows that it is in quadrant II, which means that the development strategy includes drafting regulations on Domestic Wastewater Management, transferring the authority of desludging management to the PUPR office, disseminating information on an ongoing basis and collaborating with the private sector in the distribution of CSR (Corporate Social Responsibility). Based on the business model canvas assessment, for the short term the Business Model is co-composting and for the long term the Business Model is Scheduled desludging management. Another alternative is to use faecal sludge as briquettes that can be a substitute fuel for coal in Sawahlunto City.