Research of COD and BOD Removal Efficiency in Tempeh Industrial Wastewater Treatment using Aerated Activated Sludge
L. Nurdini1, Hendriyana2, W.G. Nur Asti. D3, A. Febriyani Putri4

1Lulu Nurdini, Universitas Jenderal Achmad Yani, Indonesia. 

2Hendriyana, Universitas Jenderal Achmad Yani, Indonesia. 

3W.G Nur Asti. D, Universitas Jenderal Achmad Yani, Indonesia.

4A. Febriyani Putri, Universitas Jenderal Achmad Yani, Indonesia.

Manuscript received on 10 January 2020 | Revised Manuscript received on 06 February 2020 | Manuscript Published on 20 February 2020 | PP: 229-231 | Volume-9 Issue-3S January 2020 | Retrieval Number: C10500193S20/2020©BEIESP | DOI: 10.35940/ijitee.C1050.0193S20

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Abstract: Tempeh is the most popular food in Indonesia. The process of making tempeh requires a lot of water. The preliminary analysis of tempeh wastewater showed that the value of COD, BOD and pH are 26693 mg/l, 11204 mg/l and 3,99. This results actually do not meet the Minister of Environment regulation No.5 (2014) about quality standard of wastewater treatment for industry. The quality standard for COD, BOD and PH for tempeh wastewater are 100-300 mg/l, 50-150 mg/l, and 6-9. So, the tempeh industrial wastewater must be processed before being discharged into the environment. The aim of this study is to determine the activated sludge ability to reduce COD, BOD, and also pH value in tempeh industrial wastewater. Tempeh industrial wastewater treatment carried out in aerated batch reactor using wastewater composition 10%, 15%, and 25% (v/v) of tempeh wastewater in 500 ml as a research variables. The wastewater while the hidraulic retention time is 48 hours. The highest COD, BOD removal efficiency occured at 25% (v/v) wastewater composition each for 74,58%, 79,27%. The COD and BOD concentration after treatment are 7625,79 mg/l and 4555,7 mg/l. And pH at 25% (v/v) wastewater composition is 6,92. pH value after treatment meet quality standard of industrial wastewater from Minister of Environment regulation No.5 (2014), but COD and BOD do not meet the standards.

Keywords: COD, BOD, Activated Sludge.
Scope of the Article: Industrial Engineering