The use of subsurface constructed wetland for the treatment of tofu industrial wastewater in Semanan, Jakarta Barat
Abstract The tofu preparing industry, typically done by the little businesses, can be found in almost every city in Indonesia and is dominated by industrial house stairways. The largest industry does not have a unit of processing wastewater. The wastewater focus is as yet over the edge quality norm, which messed contamination up. Constructed wetlands are affordable and reliable green technologies to diminish water contamination by utilizing plants. This study aims to know the quality of tofu industrial wastewater in Semanan, Jakarta Barat and analyze the removal of pollutants. The performance of the horizontal flow type Sub-Surface Flow constructed wetland with Typha latifolia plant. The media used were soil, sand, and gravel with a Typha latifolia plant. Testing the quality of tofu wastewater in Constructed wetland every 7 days at inlet and outlet, the sample was taken for TSS, BOD, and COD concentration. This research showed that the reactor could decrease TSS by 91.17% on day 36, a decrease of BOD 89.30% on day 15, and COD 87.86% on day 36. Those plants can produce growth fertile. These results fulfil the requirement of the quality standards of the Decree of the Minister of Environment No. 05 of 2014.