Performance of Food Industry Wastewater Treatment Plant (WWTP) by Combining Anaerobic, Aerobic, and Ozonation Process Ira Ryski Wahyuni (a*), Imam Rozali Fathar (b), Assyifa Junitasari (a)
a) Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung. Jl. A.H. Nasution No 105 Bandung, West Java, 40614, Indonesia
*ira_ryski[at]uinsgd.ac.id
b) CV. Lumas Multi Sarana (Citrabening), Jl, Neptunus Barat I Blok A15 No. 2 Bandung, West Java, 40286, Indonesia
Abstract
The wastewater of the food industry is one of the sources of environmental pollution. It contains high concentration of organic matters, dissolved solids, and suspended solids. In this study, the effectiveness assessment of the WWTP performance in one of the sausage industries located in Lembang, District of West Bandung, West Java was conducted. The parameters observed were BOD5, COD, TSS, pH, oil/grease, ammonia (NH3-N), total coliform. The WWTP is designed with a combination of anaerobic, aerobic and ozonation treatments. The initial process in the WWTP is pH control. This stage ensures that the optimal pH is in the range of 7.5 to 8.5 by adding a sodium bicarbonate solution. This stage is principal to ensure microorganisms can grow and develop properly and to avoid the potential for H2S poisoning as a result of the accumulation of sulfur elements in wastewater. The next process is the anaerobic process which aims to reduce COD, BOD5, TSS concentration. Then proceed with the aerobic process, in this stage, aeration is conducted by injecting air through a fine bubble air diffuser and adding aerobic bacteria to the aeration tank. The next process is ozonation which is known to have radical properties (easy to react with surrounding compounds). Therefore, it works as a strong oxidizing agent to oxidize organic compounds, sterilize high content of microorganisms, eliminate odors and colors in meat processing industry wastewater. The results show that the WWTP performance has a high-efficiency value in treating food industry wastewater. The efficiency is 89% for BOD removal, 97% for COD removal, and 100% for TSS removal.
