Application of Rumex dentatus L in treating livestock and poultry breeding waste water

Abstract

The invention relates to application of Rumex dentatus L in treating livestock and poultry breeding waste water, which concretely comprises the following steps of: planting Rumex dentatus L on a packed bed of a subsurface flow constructed wetland; forming a subsurface flow constructed wetland system, introducing the livestock and poultry breeding waste water; and treating the livestock and poultry breeding waste water by utilizing the wetland system. Through a great deal of test researches for a long period of time, people find that the Rumex dentatus L can effectively reduce contents of pollutants, such as CODcr, ammonia nitrogen, total phosphorus, total nitrogen, and the like in the livestock and poultry breeding waste water, tolerate higher concentration of the pollutants and be used for purifying the livestock and poultry breeding waste water, therefore, the invention provides a novel plant resource capable of being used for treating pollution of livestock and poultry breeding waste water, which aims to solve the problem of insufficient plant variety resources in the constructed wetland treatment technique. The provided plant resource has the characteristics of lower planting cost and operational cost, favorable effect, strong operability, and the like.

Description

technical field [0001] The invention relates to the application of Rumex dentata in treating livestock and poultry breeding wastewater, and belongs to the technical field of livestock and poultry breeding wastewater biodegradation treatment. Background technique [0002] With the rapid development of animal husbandry, my country's livestock and poultry breeding industry, especially the intensive and large-scale breeding industry, has become one of the main sources of environmental pollution in our country. Because the aquaculture wastewater has the characteristics of high organic matter, N, P content and high veterinary drug residues, it is necessary to use a combination of aerobic, anaerobic and natural treatment technologies to treat aquaculture wastewater in actual production. In recent years, with the increasingly prominent energy problems, people have combined the development and utilization of biomass energy with the wastewater treatment process of aquaculture to impro...

AI Technical Summary

Problems solved by technology

In recent years, with the increasingly prominent energy problems, people have combined the development and utilization of biomass energy with the wastewater treatment process of aquaculture to improve the economic benefits of wastewater treatment. Although the COD of treated wastewater can reach the standard, its N, The P content still cannot meet the discharge standard ("Discharge Standard of Pollutants for Livestock and Poultry Breeding Industry" (GB18596-2001))

Although the waste water that does not meet the N and P standards can be used for farmland irrigation, flushing pens, etc., due to the characteristics of non-continuity, seasonality and limitation of agricultural water use, most of the waste water still needs to be discharged directly to natural water bodies. It is one of the main sources of non-point source pollution in rural areas.

If the discharged wastewater is to fully meet the standards, not only the large-scale construction of treatment facilities, but also the high investment and operating costs are obviously unaffordable for many farming enterprises operating at low profits in my country.

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