A method for comprehensive treatment of excrement and sewage in large-scale dairy farms with water flushing

Abstract

The invention discloses a water-rinsing-dung type large-scale dung comprehensive treatment method for a diary cattle farm. The method comprises the following processes of: 1) feeding collected dung, cattle house rinsing water and the like into a dung collection furrow, performing grid interception, separation, conditioning and homogenization and solid-liquid separation, airing and using the solids as cattle house padding, and ensuring liquid to enter a temporary storage pool; 2) feeding a portion of liquid in the temporary storage pool into an anaerobic fermentation system for treating to be used as wastewater for performing backwash of the system, and feeding the other portion of liquid into a multilevel biological cleaning storage pond through a sewage storage pool and connecting the multilevel biological cleaning storage pond with a filling mixed pool for regulating water quality to reach the safe agricultural irrigation level; 3) delivering dry and clean dung into a dung heaping field and using the dry and clean dung as edible fungi culture mediums and earthworm culture mediums, or directly selling or selling to persons who work in the planting industry after the dry and clean dung is made into composted fertilizers or organic fertilizers by means of stack retting. The water-rinsing-dung type large-scale dung comprehensive treatment method has the advantages that a water using method is optimized, so that the steps of production and drainage, treatment and utilization of sewage are performed in a virtuous circle mode; the method is high in process universality, low in operation cost and long in service life, has high capability of buffering and purifying the sewage, and is capable of effectively improving environmental hygiene.

Description

technical field [0001] The invention relates to agricultural resources and environmental wastewater treatment technology, in particular to a method for comprehensive treatment of excrement of large-scale dairy farms by flushing manure with water. Background technique [0002] According to the Ministry of Agriculture's "National Advantageous Agricultural Products Regional Planning and Layout 2008-2015" statistics, at present, my country's per capita dairy product consumption is only equivalent to 1 / 4 of the world's average level and 1 / 12 of that of developed countries, and there is broad room for development. In recent years, with the increase in the demand for dairy products, driven by the dairy cattle advantage area, my country's dairy industry has continued to develop at a high speed, and a number of star enterprises and well-known brands have emerged, and have achieved remarkable results. The breeding volume is 14.4 million. According to the plan, it is estimated that by ...

AI Technical Summary

Problems solved by technology

At present, the problems in the collection and transportation of large-scale dairy farms with water flushing manure are: limited capacity of solid-liquid separation equipment, large water consumption, many water links, large amount of sewage produced and discharged, high concentration of organic matter in sewage, and suspended solids in sewage High concentration, high environmental risk for direct agricultural use

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