Resource treatment method for pig farm waste

Abstract

The invention discloses a pig farm waste recycling treatment method. The method comprises the following steps: step 1, drying dehydrated pig manure produced in a pig farm, and performing pyrolysis treatment at 300 DEG C to prepare dehydrated pig manure biochar; step 2, applying the dehydrated pig manure biochar to an anaerobic fermentation system of swine wastewater for anaerobic fermentation treatment; 3, evaluating the promotion effect of the addition of the dehydrated pig manure biochar on the fermentation efficiency of the pig manure wastewater by monitoring the soluble COD, the volatile fatty acid concentration and the biogas yield in the anaerobic fermentation process; the abundance of the resistance genes contained in the dehydrated pig manure before and after pyrolysis treatment is measured, and the reduction effect of the charcoal prepared through pyrolysis on the resistance genes in the dehydrated pig manure is evaluated; by comparing the abundance of the resistance genes in the swine wastewater fermentation liquor before and after the addition of the dehydrated pig manure biochar, the reduction effect of the addition of the dehydrated pig manure biochar on the swine wastewater fermentation resistance genes is evaluated. The method realizes green treatment of two kinds of pig farm wastes.

Description

technical field [0001] The invention belongs to the technical field of environmental waste treatment, and in particular relates to a pig farm waste resource disposal method. Background technique [0002] Pig farm waste has complex components and high pollution intensity. Exploring its resource disposal technology is of great significance to the sustainable development of the pig farming industry. Before entering the treatment unit, the waste from large-scale pig farms will be separated by a solid-liquid separation system and divided into dehydrated pig manure and pig wastewater. On the one hand, these two types of wastes have high pollution intensity and are difficult to deal with; on the other hand, they have high organic matter content and have strong potential for resource utilization. At the same time, due to the excessive use of antibiotics in the pig breeding industry, there are high-abundance resistance genes distributed in dehydrated pig manure and pig wastewater, a...

AI Technical Summary

Problems solved by technology

For the above-mentioned dehydrated pig manure treatment technology, there are mainly disadvantages such as poor pollutant reduction effect, low conversion efficiency of dehydrated pig manure resources, and large area occupied by technical equipment.

For the above-mentioned pig raising wastewater treatment technology, the disadvantage of aerobic treatment is high energy consumption, which cannot realize energy recovery; the disadvantage of ecological pond technology is that it occupies a large area, low treatment efficiency, and cannot realize energy recovery

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