Research progress on livestock wastewater treatment technology

Abstract

Livestock wastewater is composed of animal excreta and the water used to clean the hog housing sheds. It contains high concentrations of organic matter, ammonia, phosphorus and suspended solids and is one of the important pollution sources of the breeding industry. This review reported on the most recent wastewater treatment technologies in the breeding industry, including aerobic biological treatment technology, anaerobic biological treatment technology, natural treatment technology and in-depth treatment technology. Some new processes such as simultaneous nitrification and denitrification, short-cut nitrification, anammox and membrane bioreactor were analyzed and summarized. Finally, suggestions and prospects were put forward for the application and research and development of aquaculture wastewater treatment technology.