Tail water treatment method based on sulfur and oyster shells

Abstract

The invention relates to a tail water treatment method based on sulfur and oyster shells. The method is characterized in that the waste oyster shells are used as the substitute of limestone and used in the tail water treatment process, the mass ratio of sulfur particles to the oyster shell in a reactor is 1:0.7-1:0.8, the particle size of the sulfur particles is 1-8mm, and the waste oyster shells are crushed into particles with the particle size being 1-5mm. The tail water treatment method has the advantages that the oyster shells are used as the habitat of microorganisms, contain rich calcium carbonate and provide carbon sources for sulfur autotrophic type thiobacillus; the oyster shells also contain various inorganic trace elements such as sodium, barium, copper, iron, magnesium, manganese, nickel and strontium and provide nutrition for the survival of the microorganisms; the oyster shells physically structurally comprise cuticles, prismatic layers and nacreous layers, the foliated prismatic layers are the main part and contain a large number of micro-pores 0f 2-10 micrometers, high adsorption capacity is achieved, organic carbon sources are also attached to the oyster shells, and an autotrophic / heterotrophic synergistic denitrification function can be achieved; waste can be turned into wealth, deep nitrogen and phosphorus removing can be performed on tail water, and the method is low in cost.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a tail water treatment method based on sulfur / oyster shells. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, a large amount of nutrients such as nitrogen and phosphorus have entered the water body, resulting in eutrophication of the water body. In order to further control water body pollution, my country's investment in sewage treatment is also increasing. . [0003] At the same time, in order to improve the water environment quality of the receiving water body, the tail water in the sewage treatment plant needs advanced treatment, especially the advanced treatment of nitrogen and phosphorus. The current treatment method is mainly based on the denitrification deep bed filter. , needs to add carbon source, which increases the cost; compared with heterotrophic denitrification, denitrification has obvious advantag...

AI Technical Summary

Problems solved by technology

[0004] Among shellfish seafood, oysters are loved by consumers for their delicious taste and rich nutrition. However, a large number of oyster shells after consumption are discarded as garbage, which not only pollutes the environment but also causes a waste of resources.

Images