Study on Pretreatment Process of Piggery Wastewater

A large amount of piggery wastewater is produced from the pig farm, which contains a great amount of ammonia nitrogen, organic matter and pathogenic bacteria. The wastewater that is stinking and blackened can cause great harm to the environment if not treated in time. In this experiment, piggery wastewater was pretreated by adding flocculant to investigate the effect of the flocculant type, adding amount and settling time on the experiment results. The results indicated that it can effectively remove the pollutants by adding 25 ppm of nonionic F140 (PAM) and 100 ppm of polyaluminum chloride (PAC) to the piggery wastewater.