Zero-discharge comprehensive utilization system for waste of large-scale pig farm

Abstract

The invention discloses a zero-discharge comprehensive utilization system for the waste of a large-scale pig farm. The zero-discharge comprehensive utilization system comprises a collecting and preprocessing unit, an anaerobic fermentation unit, a biogas utilization unit, a biogas power generation unit, a heat recycling unit, a biogas slurry processing unit, an ozone generating system, an oxidizing unit and a biogas slurry circulating processing unit. The zero-discharge comprehensive utilization system has the advantages that the system is efficient, thorough, free of secondary pollution, capable of lowering pig cultivation environment protection cost, capable of creating high economic benefits, capable of saving water and capable of protecting ambient environments; pig manure is used forperforming anaerobic fermentation, generated biogas is used for generating power to reduce the production and living power consumption cost of the pig farm, the high power consumption cost problem ofa O3/UV advanced oxidation treatment process can be solved, and grid-connected power generation can be achieved to earn electricity fee income; processed biogas slurry tail water can be used for washing pig houses, water can be saved, pig epidemic diseases and pig house mosquitoes and flies can be reduced, and production efficiency is increased.

Description

technical field [0001] The invention relates to the field of animal breeding, in particular to a zero-discharge comprehensive utilization system for large-scale pig farm waste. Background technique [0002] With the implementation of the new environmental protection law in 2015, large-scale farms are facing unprecedented environmental pressure, and the treatment of manure and wastewater has become the focus of attention of the breeding industry. At present, the common waste disposal methods of large-scale pig farms are: 1. Direct return to the field. Although this method is simple to operate and low in cost, it is highly polluting. 2. Anaerobic fermentation. Pig manure is anaerobically fermented to produce biogas. The biogas is used for lighting and cooking. The biogas slurry is discharged into the nearby fish pond or irrigation, and the biogas residue is directly returned to the field. Although this method has treated the manure, but the biogas slurry still contains a re...

AI Technical Summary

Problems solved by technology

Although this mode can solve the problem of water discharge, the operating cost is high, and biological treatment is generally used, and the treatment effect is unstable

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