Rearch On Pollution Prevention And Resource Utilization Of Excrement In Large-Scaled Livestock And Poultry Farms In Tianjin

With the rapid development of intensive livestock production, the problem of environmental pollution has become increasingly prominent, and urine brings is more and more outstanding. Because of tremendous amount of feces, urine, wastewater, odor and pathogenic microorganisms, new sources of pollution has brought about great pressure on environment, public health security and livestock farming's security. Large pollution concentrating and continuing discharge, which has already become an important local pollutant source. Large pollution concentrating and continuing discharge, which has already become an important local pollutant source.This paper in-depth analysis and evaluation of the Tianjin region of intensive livestock farming and breeding status of pollution control, resource utilization situation, Survey research methods with literature synthesis method. In view of loading fecal capacity of land treatment, the capacity of fecal loaded by soil was analyzed and the alarm signal of hazard that fecal polluted soil was classed. The result shows:the pig farms and cow farms are main source of the excrement urine,90% of manure discharged without treatment and disposal to farmland, the pollution situation is becoming increasingly serious. It is also the main source of the waste water, each year, about 30% of livestock manure ponds into the river, so that the city's increasing Eutrophication. Jixian district maximum load of manure land, environmental impact is more serious, and Dagang district is little effect. Study calculated f the city's manure land load, load warning the city of the land value of 0.5, the environmental impact of animal manure has demonstrated a certain level of environmental stress.Choose a representative survey of large-scale farms, RYililai Culture Co. Ltd.and Jialihe Culture Co. Ltd.are two large-scaled livestock breeding company, their successful experiment is import of advanced technology, instituted an efficient treatment model. The result shows:After a cleaning process of transformation, large-scale farms Manure excretion decreased significantly, to reduce the pollution of the surrounding environment, It also gives technical lines of collective recovery high concentration cow manures, almost reached 80% in Jialihe Culture Co. Ltd. And those technologies all have a significant effect without obvious seasonal difference.Aim at the state of pollution control current situation and feasibility of pollution control analyzing at present to Tianjin, I put forward to strategic countermeasure and technological route and scheme of the livestock plants for related departments reference.