Pig Farms Wastewater Treatment

The sources of pig wastewater mainly include cleaning water from farms. The manure removal process used in the farm includes dry manure removal and water flushing manure. The pollution load of wastewater produced by flushing manure is relatively high, with COD as high as 20,000 mg/L and NH3-N average of 600 mg/L; the pollution concentration of dry manure is relatively low and COD is as high as 2500-3000 mg/L, but the pollutant content is also very high. At the same time, the wastewater of pig farms contain a large amount of organic matter, nitrogen, phosphorus, suspended matter and pathogenic bacteria and produce foul odor, which has a great impact on environment. The wastewater needs to be treated according to the local wastewater discharge indicators.

The characteristics of pig farms wastewater:
1. COD, BOD5, NH3-N, P, SS are high, and contain a lot of suspended matter such as pig manure.
2. It is a higher concentration of organic wastewater. Since BOD5/COD>0.3, it can reach 0.6, which is easily biodegradable. This type of wastewater has good biochemical properties, and the use of biochemical treatment methods can achieve the ideal treatment effect.

Difficulty analysis
farms wastewater is characterized by high concentrations of organic matter, suspended matter and ammonia nitrogen, and unstable water quality. Most of the existing treatment methods have high operating costs, unstable treatment effects, and can not meet discharge standards.

Wastewater process
Solid-liquid separation is the basis of livestock wastewater treatment. Due to the high SS, it is necessary to set up a pretreatment process before biochemistry to remove most of the solid matter to reduce the load of subsequent processing. For liquid livestock and poultry manure wastewater, anaerobic technology should be used for harmless treatment, so anaerobic digestion is a widely used wastewater treatment process in livestock and poultry farms.

Organic wastewater treatment technology has been developed for a relatively long time, and a variety of treatment technologies and process routes have been formed, generally with the main purpose of removing organic matter. For the treatment of high-concentration organic nitrogen-containing wastewater, the more mature method is to use the UASB+2 level AO process, which can ensure a higher COD, removal rate, and a certain denitrification and phosphorus removal effect. In addition, the effluent after anoxic treatment contains more reducing substances and incompletely degraded organic matter, and further treatment is required. Aerobic biological treatment can make the anoxic effluent stably meet the discharge standard.

Shijiazhuang Zhengzhong Technology Co., Ltd. is a comprehensive high-tech enterprise with main business of wastewater project contracting, process section undertaking and water and wastewater treatment equipment manufacturing. The company has strong technical force and rich engineering experience. It has long been engaged in the overall wastewater engineering general contracting business in the breeding industry, urban sewage, biogas project, dairy wastewater and other fields, providing customers with all-round services such as engineering design, equipment manufacturing, and engineering construction. In the course of development, the company has continued to maintain the research and innovation of sewage treatment technology and equipment manufacturing technology, so that the company has the ability to solve sewage treatment in different industries. It can provide customers with customized sewage treatment processes, covering the fields of high-concentration organic wastewater treatment such as the pharmaceutical industry, wine industry, paper industry, kitchen waste, and landfill leachate. And based on the field of complete set of water and wastewater treatment equipment manufacturing, gradually forming a diversified product system centered on enamel assembly tanks, with an excellent reputation and a high market share in the industry.