The Evaluation of Physical, Biological, and Chemical Treatments on Piggery Wastewater: A study on pig farming in Sumogawe village, Semarang Regency, Central Java

Abstract

Pig farming is one of the protein sources for Indonesians, and Central Java is the fifth province producing pigs for consumption. As pig waste contains high organic compounds, waste treatment is required to avoid pollution. Previous studies indicate that pig waste is usually processed into biogas or fertilizer and treated by an anaerobic-aerobic process. However, studies on pig wastewater treatment by aerobic process solely are very limited. This research aims to evaluate pig wastewater treatment performance by a biological aerobic process using the application of Biogrow Media-2604 and Resin Seedling Bacteria-1103 produced by Nusa Alam Kreasindo company and chemical process. The wastewater was flown at the rate of 84.4 m3/d with a 48-hour retention time. Samples taken from the inlet, sixth aeration tank, and outlet were analyzed to determine the pH, TSS, BOD5, COD, and N-NH3. The result indicates that the biological aerobic process could reduce TSS to 64%, BOD5 to 90.81%, and COD to 89.06%. However, the aerobic process could not reduce N-NH3, which indicates the need for an anaerobic process. The application of PAC coagulant could decrease all pollutants to fulfill the quality standard regulated by the government. This indicates that applying the aerobic process solely is adequate to process pig wastewater.