As the largest pig breeding country in the world, China's pig breeding industry occupies a pivotal position in the development of modern economy. However, its breeding wastewater also poses a rather challenging environmental pollution problem. A million pig farms waste water excrement up to 100-150t, to purify these excrements and wastewater more difficult, but after the sewage treatment to long-term national discharge standards will require a lot of investment and high operating costs, also Increase the cost of pig raising.
The problems of excrement and urine pollution brought by these pig production can not be solved in time and effectively, which will restrict the scale and mode of development of pig farms to a certain extent, endangering the ecological security. At present, the problem of production focus has risen to people Social issues of general concern. In recent years, many large economic development provinces in our country are carrying out large-scale environmental pollution remediation in pig farms. Due to the forced relocation of pig farms in many areas, many areas have strictly forbidden areas and restricted areas, indicating to a certain extent Pig farm environmental pollution control situation will be the future pig farm to seek ways to develop one of the necessary ways.
Pig farm farming wastewater hazards
Serious pollution of surface water, groundwater, soil and ambient air caused by manure discharge from farms directly affects people's health. Untreated manure contains a large amount of pollutants. If such organic waste water is directly discharged into Or washed into the rivers and lakes with the rain pool, a large number of consumption of dissolved oxygen in water, so that black water smelly, resulting in water pollution.
Fecal sewage contains a large amount of n, p and other nutrients is one of the important causes of eutrophication of water bodies into the ponds and rivers to make the organism-contaminated aquatic organisms gradually death, serious lead to the loss of fish ponds and rivers Features.
Aquaculture sewage infiltration into the ground for a long time, so that the concentration of nitrate nitrogen or nitrite nitrogen in groundwater increased groundwater dissolved oxygen content decreased, increased toxic components, leading to deterioration of water quality, seriously endanger the quality of water around the living. High concentrations of sewage can lead to clogging of soil pores, resulting in soil permeability, permeability decreased and compaction, salinization, seriously reducing the quality of the soil, and even hurt crops, causing crop growth retardation or death.
Pig farm farming wastewater treatment ideas
Sewage discharged from the farm is organic wastewater, which has the best anaerobic fermentation effect. However, the treated sewage has not yet reached the optimal standard and can not be directly discharged. Appropriate amount is used for farmland. The fish pond is an excellent nutrient solution. Therefore, the sewage treatment in farms must be considered in combination with biology and ecology, which is the best and most economical way to promote each other's growth.
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