Method and breeding sewage treatment system for treating breeding sewage through pulverized fuel ash

Abstract

The invention discloses a method and breeding sewage treatment system for treating breeding sewage through pulverized fuel ash. The breeding sewage treatment system for treating the breeding sewage through the pulverized fuel ash comprises a feces collection pond, a solid-liquid separation device, a slurrying tank, an adsorption treatment device, a sterilization device and a sludge collection pond. The adsorption treatment device comprises a first treatment tank, a second treatment tank, a third treatment tank, a fourth treatment tank and a fifth treatment tank which are connected in sequence.The breeding sewage enters the adsorption treatment device to be subjected to adsorption treatment with pulverized fuel ash slurry, pores inside the pulverized fuel ash are rich, the specific area islarge, the capability of adsorbing and flocculating pollutants is high, decoloration and deodorization can be effectively achieved, and organic matter, heavy metal ions, bacteria and other microorganisms, suspending colloid impurities and the like in water are removed; water is purified, secondary utilization of solid waste is achieved, the sewage treatment cost is lowered, after the breeding sewage is subjected to five stages of adsorption treatment, the COD value and chromaticity in the sewage can be effectively lowered, the effluent can be recycled, and the use quantity of water resourcesis reduced.

Description

technical field [0001] The invention belongs to the field of aquaculture sewage treatment, and in particular relates to a method for treating aquaculture sewage by using fly ash and a system for aquaculture sewage treatment. Background technique [0002] The aquaculture industry is a low-profit industry, and the aquaculture operators cannot afford the high-investment sewage treatment model. The direct discharge of a large amount of aquaculture sewage has caused water pollution problems to become increasingly serious. , the development of resource utilization of aquaculture wastewater has become crucial. The utilization of sewage resources in breeding plants is a scientific, commercial and pollution-free breeding method gradually developed with the advancement of science and technology. [0003] At present, the commonly used methods for aquaculture sewage treatment include chemical methods and biochemical methods, both of which have shortcomings. On the one hand, adding chem...

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Problems solved by technology

[0003] At present, the commonly used methods for aquaculture sewage treatment include chemical methods and biochemical methods, both of which have shortcomings. On the one hand, adding chemical flocculants is the main chemical method, which is prone to secondary pollution, such as polyacrylamide (PAM), its monomer It has neurotoxicity, teratogenicity, carcinogenicity, and mutagenicity. Its use is limited, and its synthesis conditions are harsh, its price is high, its storage period is short, and some are not easy to dissolve.

On the other hand, biochemical treatment of sewage mainly uses the metabolism of microorganisms to degrade organic matter in sewage into inorganic substances such as carbon dioxide, water, and sulfate, and the decomposition of organic matter is also a waste of resources

[0004] Fly ash is the main solid waste of coal-fired power plants. A large amount of fly ash is piled up and discarded, resulting in a serious waste of resources, which needs further improvement

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