A complicated problem for big city governments today is the increasing volume of solid waste, due to population growth and mobility so that the waste load will also increase, especially in metropolitan cities such as Makassar City. To reduce the rate of organic waste generation, which is 60%, is to use organic waste as compost, both liquid and solid. The purpose of this study was to compare the effectiveness of composting with EM4 and MOL activators. The results of the study with the addition of EM4 activator, MOL activator and without the addition of activator from the first day to the fourteenth day the compost structure was different. The addition of MOL produces a slightly coarser structure compared to the addition of EM4, while the compost without activator still smells like wet waste. The quality (C/N) of compost, the addition of 100 ml of EM4 was in the optimum level, while the addition of 100 ml of MOL was less than optimum.
One alternative to solving the problem of wastewater treatment is to treat wastewater using Moringa seeds as a natural coagulant. Moringa seeds contain the bioactive compound rhamnosyloxy-benzil isothiocyanate, which is able to adsorb and neutralize mud and metal particles contained in suspension waste with dirt particles floating in water, so it is very potential to be used as a natural coagulant to clean water.This research was conducted to determine the method of wastewater treatment by using Moringa Oleifera Seeds for Phosphate (PO4) Content in Hospital Wastewater, and calculating the difference in weight variations of Moringa oleifera seeds (1000, 1500, and 2000 mg / L) with deposition time (15 minutes). This type of research is quantitative research with true experimental research. The research design used was randomized control-group pretest-posttest design.The results showed that in the range of observations made, the weight of Moringa seed powder as an effective coagulant was 2000 mg / L hospital wastewater with a deposition time of 15 minutes capable of removing phosphate levels by 28.77%.
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