Trench type composting method for treating breeding sewage and solid wastes simultaneously

Abstract

The invention discloses a trench type composting method for treating breeding sewage and solid wastes simultaneously, which is used in the field of breeding waste treatment. The trench type composting method comprises the steps of collecting the breeding sewage of farms in a closed sewage pool via a concealed conduit, and colleting the solid wastes in a composting workshop near the sewage pool; leading the breeding sewage to a composting system by a water pump; adjusting the proportion of solid wastes to breeding sewage to auxiliary materials in the composting system, enabling the carbon nitrogen ratio to be (25-30):1 and water content to be 50-60%, moving the materials into a composting trench to undergo aerobic composting, and meanwhile, enabling the water pump to work to pump the breeding sewage in the sewage pool into the composting trench via a spray pipe above the composting trench; turning the breeding sewage and solid wastes in the composting trench, simultaneously aerating the composting trench via aeration openings formed at the bottom of the composting trench, exhausting the waste gases generated in the composting trench via a draught fan after collecting the waste gases, and carrying out dedusting and deodorization treatment. According to the invention, simple sewage treatment is changed into resource utilization of all breeding wastes, so that breeding waste treatment pressure is greatly reduced.

Description

technical field [0001] The invention is used in the field of aquaculture waste treatment, and in particular relates to a tank-type composting method for simultaneously treating aquaculture sewage and solid waste. Background technique [0002] Large-scale breeding is the necessity of the development of animal husbandry and the main symbol of the modernization of animal husbandry, so the trend of large-scale breeding of animal husbandry is irreversible. With the development of large-scale aquaculture, one of the consequences is the separation of aquaculture and planting links, and the generation and treatment of a large amount of aquaculture waste has become a major issue for the sustainable development of aquaculture. Relevant data show that the current annual production of livestock and poultry manure in my country is 2.5-3 billion tons (fresh weight), and this figure will increase with the further development of my country's livestock and poultry breeding industry. At pres...

AI Technical Summary

Problems solved by technology

If there is no suitable large-scale planting area around the farm to consume biogas slurry, then the biogas project is equivalent to "pollution source amplification" to a certain extent----a large amount of biogas slurry cannot be disposed of safely

[0004] At present, the main pollutants of aquaculture sewage are still organic matter and nitrogen and phosphorus substances. The main technical bottleneck of this high-concentration organic sewage treatment is that the concentration of sewage COD often exceeds the range that conventional biological treatment can bear, and the sewage has high concentrations of SS, nitrogen and phosphorus. etc. also make conventional biological treatment difficult to deal with

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