Studi awal pengolahan limbah dengan COD-BOD tinggi secara koagulasi-flokulasi

Widayati, Tunjung Wahyu and Mahreni, Mahreni and Herman, Herman and Catur SW, Muhammad (2013) Studi awal pengolahan limbah dengan COD-BOD tinggi secara koagulasi-flokulasi. In: Prosiding Seminar Teknik Kimia "Kejuangan" 2013 Pengembangan Teknologi Kimia untuk Pengolahan Sumber Daya alam Indonesia, 5 Maret 2013, Yogyakarta.

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Abstract Waste of chemical laboratory without dilution was analyzed and it was found that pH = 5.5 while (COD=171 717 mg/L) and BOD = 10500.1 mg/L) . This research carried out to reduce COD and BOD using flocculation and coagulation processes. Research has been done by mixing the waste with Alum in a flask equipped with a stirrer. Waste is stirred for 15 minutes at a constant speed of 150 rpm. After that the pH of the waste is increased by adding Calcium hydroxide Ca(OH)2 so as to achieve a certain pH. The addition of alum and Ca(OH)2 caused the formation of flock. The flock formed more and more, and left without stirring for 24 hours for maximum flock formation. Further separation of flock using a filter. The COD-BOD of the supernatant is analized. The purpose of the study to determine the pH and the ratio of alum:waste to the reduction of are greatly affect the reduction of COD/BOD. Reduction of COD/BOD highest achieved at pH 12.2 and the ratio of alum/waste is 1/0 (ml/ml) ( COD reduction = 96%; BOD reduction = 68.5%). COD and BOD of effluent is still higher than the COD/BOD water quality standards set by the government regulation and still require further processing. So that the water can be safely discharged into the environment. Recommended further processing is an electrochemical process. Keyword : Coagulation, flocculation, Chemical Laboratory, Waste water

Item Type: Conference or Workshop Item (Paper)
Subjects: Q Science > Q Science (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Date Deposited: 14 Dec 2018 06:50
Last Modified: 14 Dec 2018 06:50

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