Farming sewage mainly includes urine, feed residues, residual manure and washing water, and in some places it also includes domestic wastewater generated during the production process. It is a high concentration organic sewage with a large content of suspended solids and ammonia nitrogen. After this untreated sewage enters the natural water body, the content of suspended solids, organic matter and microorganisms in the water increases, changes the physical, chemical and biological composition of the water body, and deteriorates the water quality.
The sewage also contains a large number of pathogenic microorganisms that will spread through the water body and endanger the health of humans and animals. Farming sewage has the typical "three highs" characteristics, that is, high organic matter concentration, COD as high as 3000-12000mg/l, ammonia nitrogen as high as 800-2200mg/l, suspended SS is dozens of times higher than the standard, the color is deep, and it contains a lot of bacteria and organic phosphorus. The main characteristics of farm sewage are large drainage, concentration, and strong hydraulic shock load; high concentration of organic matter, fast hydrolysis and acidification, good biodegradability, and good sedimentation performance. The sewage is often accompanied by disinfectant water, heavy metals, residual veterinary drugs, and various Pollutants such as zoonotic pathogens.

Holy shield wastewater treatment equipments can meet the following standards:""Emission Standard of Pollutants for Livestock and Poultry Breeding Industry" GB18596-2001,GB/T 25499-2010 Urban Wastewater Reclamation, Green Land Irrigation Water Quality"Emission Standard of Pollutants for Urban Sewage Treatment Plants" GB18918-2002"。According to customer requirements, the design process can meet local standards,Provide personalized sewage solutions for free.