Application of the multi soil layering (MSL) system to treat laboratory wastewater

Laboratory wastewater must be managed and handled properly so as not to damage the environment. The management was carried out starting from the separation and labeling of the wastewater according to its character, to processing it with a wastewater treatment plants (WWTP). The chemical waste resulting from the analysis which was classified as hazardous (B3) wastewater was separated and processed by a third party who has the authority, while the wastewater from washing glass utensils from the sink was channeled to the laboratory wastewater treatment plants (WWTP). The application of the Multi Soil Layering (MSL) system to treat laboratory wastewater from the Baristand Industry Padang was carried out by making a 2 x 3 x 2meters sedimentation tank, two 3 x 3 x 2.5meters MSL system tanks, two 0.5 x 0.6 x 0.5meter control tanks and a 2 x 3 x 1meters tank for a fish pond. The processing results revealed that the WWTP with the MSL system was effectively used to treat wastewater from that laboratory. The analysis results showed a high reduction efficiency which was able to reduce the pollutant parameters BOD, COD, TSS, Fatty Oil and Ammonia 95%, 88%, 89%, 64%, and 81%, respectively, which had met quality standards, and could reduce metal ions that were still present in laboratory wastewater.