Photocatalytic treatment method of livestock and poultry breeding wastewater

Abstract

The invention aims to provide a photocatalytic treatment method of livestock and poultry breeding wastewater, which is quick and efficient, and has broad spectrum, low price, no secondary pollution to environment and water quality and high safety performance. According to the method, livestock and poultry breeding wastewater is introduced into a photocatalytic treatment device, and flows through the surface of a photocatalyst under a lighting condition in the device to perform heterogeneous photocatalysis, wherein the photocatalyst material is a nano-titanium dioxide loaded porous carrier.

Description

technical field [0001] The invention relates to a method for treating, sterilizing and disinfecting livestock and poultry breeding wastewater. technical background [0002] my country has a large population. With the improvement of the quality of life, the demand for meat, poultry, and eggs is also increasing, which has led to the rapid development of my country's intensive livestock and poultry farms. The ecological environment of livestock and poultry breeding has deteriorated, and pathogenic microorganisms The pollution is serious, which has caused huge economic losses to the breeding industry. At the same time, although the excrement of livestock and poultry can be used as fertilizer, the discharge and pollution of livestock and poultry waste brought by the farms are becoming more and more serious. A considerable part of these pollutants has not been After purification treatment, it directly enters rivers, lakes and seas through surface runoff, causing nitrogen and phospho...

AI Technical Summary

Problems solved by technology

These sterilization and disinfection methods have their own obvious limitations: physical methods such as ultraviolet light have no follow-up antivirus effect, and the treatment cost is high; ozone generation has high construction investment, large power consumption, high operating cost, and is prone to serious corrosion; liquid chlorine Disinfection is ineffective against certain viruses and spores, and it is prone to odor. Its disinfection effect is easily affected by water quality, water temperature, contact time, and pH value, and as time goes by, viruses in water have greater resistance to liquid chlorine disinfection In addition, the liquid chlorine dosing equipment has a complex structure, is easily corroded, and is more dangerous; sodium hypochlorite disinfection consumes relatively large power and salt, high operating costs, and its disinfection ability is weak, and it is easy to bring waste residue during the process; bleaching powder Disinfection produces strong irritating gas during the operation, which is not conducive to the health of operators. The concentration of disinfectant is not easy to control, and the residues after the reaction accumulate in the sewage tank and easily cause blockage of the sewer; the cost of chlorine dioxide disinfection is high, and the generated The ClO2- and ClO3- are harmful to health, and their safety needs to be further studied; in addition, almost all chlorinated disinfectants can interact with various organic substances such as humus in water to produce many carcinogenic, teratogenic, and mutagenic halogenated hydrocarbons Organoids