The wastewater of the food industry is one of the sources of environmental pollution. It contains a high concentration of organic matter, dissolved solids, and suspended solids. This study aims to assess the effectiveness of the WWTP performance in one of the sausage industries located in Lembang, West Java. The methodology of this research is assessing the performance of WWTP by comparing the results of the laboratory effluent from the factory before and after processing, then checking the suitability of effluent results with the wastewater quality standard by the regulation of the Indonesia Minister of the Environment Number (No). 5 of 2014. 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 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. It shows that the performance of the WWTP is excellent. The processing results have met the quality standards set by the ministry of the environment.

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