A device and method for advanced treatment of livestock and poultry wastewater in a three-layer trickling filter

Abstract

The invention relates to a method for the deep treatment of livestock and poultry wastewater by using a three-layer trickling filter. According to the method, the livestock and poultry wastewater enters from a charging opening of a centrifuge, suspensions of different densities are subjected to sedimentation layering, and separated sewage enters the trickling filter; water distribution is carried out in the trickling filter by a rotating water distribution disc, the sewage is firstly subjected to aerobic treatment by a biological annular layer, pollutants in the sewage are then subjected to physical adsorption and ion exchange by a molecular sieve layer, the sewage is subjected to retreatment by a gravel layer and water leading, then, the sewage is subjected to precipitation in a precipitation layer, and precipitated sewage is led into an eddy-flow-sieving purification pool under the action of a hydraulic pump; in the eddy-flow-sieving purification pool, more hydroxyl radical.OHs are generated by a nanoscale O3 bubble and ultraviolet sterilizing lamp and a semiconductor loaded filler, so that the O3 oxygenolysis of organic matters is enhanced, the advanced oxidation effect is improved, the generation rate of.OH is effectively increased, and the treatment process is completed. The invention further discloses a device for implementing the method.

Description

technical field [0001] The invention relates to a device for removing pollutants such as suspended solids, colloids, organic matter, nitrogen and phosphorus in livestock and poultry wastewater, and more specifically relates to a device for advanced treatment of livestock and poultry wastewater by a three-layer trickling filter. [0002] The present invention also relates to a method for treating livestock and poultry wastewater by using the above-mentioned device. Background technique [0003] With the rapid growth of population, the advancement of livestock and poultry breeding and feeding technology, intensive farming has developed rapidly, and the resulting problem of livestock and poultry breeding wastewater has become more and more prominent. Untreated livestock and poultry wastewater contains a large amount of suspended particles and colloids, resulting in the physical characteristics of low transparency and high turbidity; at the same time, it contains a large amount ...

AI Technical Summary

Problems solved by technology

Untreated livestock and poultry wastewater contains a large amount of suspended particles and colloids, resulting in the physical characteristics of low transparency and high turbidity; at the same time, it contains a large amount of organic matter and nutrients such as N and P, and the pollution load is very high, so it is directly discharged to In rivers, lakes and reservoirs, it can lead to eutrophication of the water body, and it can also cause the gradual death of sensitive aquatic organisms. In severe cases, the water body will turn black and smelly, causing persistent organic pollution

If it is not treated in time, it will gradually go deep into the ground, increasing the concentration of nitrate nitrogen or nitrite nitrogen in the groundwater, reducing the dissolved oxygen content, multiplying the toxic components in the water body, and deteriorating the water quality. Therefore, it is necessary to find a fast, practical and effective solution. Methods Advanced treatment of wastewater at the end of the aquaculture industry to reduce the negative impact of economic prosperity on the environment and nature

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