关键词: 鸡粪处理, 好氧发酵, 防腐涂层, 分段曝气

Abstract: The chicken manure treatment center of Shanghai Chuandong farm has a treatment capacity of 165.0 t/d, and adopts the trough-type aerobic composting mode in design. The limit indicators for organic matter content, total nutrient content and heavy metal content of the compost product are required to meet the standard of NY/T 525—2021 Organic Fertilizer. Novel technologies including novel anti-corrosion, stepped aeration with porous bricks, and multi-linked automatic control are adopted in the design of the chicken manure treatment center, which solves the problems of anti-corrosion of the steel structure for aerobic fermentation, stepped aeration of fermentation troughs, and insufficient oxygen supply to the compost body. The evaluation results of the trial operation showed that the aeration rates per cubic meter of compost body in the temperature-increasing stage, high-temperature stage and cooling-down stage of the fermentation trough were 0.1~0.2 m3/min, 0.2~0.3 m3/min and 0.1~0.2 m3/min, respectively. The oxygen content of the compost body was higher than 8%, and the NH? content in the fermentation compost body was lower than 80 mg/m3, all of which met the design requirements. The initial adhesion, sealing performance and anti-corrosion performance of the steel structure of the fermentation plant were good. After the test specimens underwent 48 hours of continuous neutral salt spray testing with 5% concentration, no rust, white spots or corrosion phenomena were observed.

Key words: chicken manure treatment, aerobic fermentation, antiseptic coating, segmented aeration