Sewage water treatment method of large-scale pig farm

Abstract

The invention discloses a sewage water treatment method of a large-scale pig farm. The method comprises the steps of 1), dry collection of excrement; 2), putting together of excrement and sewage; 3),solid and liquid separation of the excrement and the sewage; 4),anaerobic fermentation and degradation treatment of the sewage; 5), returning to field of the processed water which is used for plantingrice or zizania aquatica; 6), harvesting of the rice or the zizania aquatica which is used for feeding pigs in the pig farm. By means of the method, the sewageof the pig farm can be effectively treated, the processing effect is good, the integration of culturing and planting is achieved, and circulation agriculture is achieved, which is environmentally-friendly and free from pollution; culturingcost of the pig farm can be reduced to increase operating benefits of the pig farm. According to the method, sows are fed by using harvested zizania aquatica which is planted by using processed waterof the pig farm as the base fertilizer and the applied fertilizer, constipation of pregnant sows can be relieved, lactation of lactating sows is improved, weaning litter weight of piglets is increased, and feed cost is saved.

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