PRASETYO HERMAWAN1) dan SUHARYANTO2)
In many industries, water purification methods like flocculation and coagulation are often inappropriate because of the high cost and low availabity of chemical coagulants. The concern for environmental and ecological issues encourages the use of the biodegradable coagulant in waste water and industrial effluent treatments. Bio-coagulants from moringa oleifera seeds are preferred because of their effective natural purifying agent, especially for easily handling and more economical alternative in countries where the plants are available. This bio-coagulant has been investigated to treat water effluent from beam house processes, a series of jar tests were conducted to determine the parameters involved during coagulation-flocculation process. The operating parameters were the effect of biocoagulant dosage and pH of water waste. The treatment by adding 20 ml (400 mg/L) dosage of moringa oleifera biocoagulant to the natural waste water at pH 8,26 and adding 2,5ml (50 mg/l) of PE flocculant resulted in 156,2 NTU turbidity reduction, and 0,06 unit decreasing of pH and 14 ml volume of sludge.
Keywords: biocoagulant, moringa oleifera seed, beam house liquid waste