Abstract
Among agricultural and rural pollution sources, rural domestic refuse, domestic sewage, crop straw and livestock manure are recyclable renewable resources, which can alleviate non-point source pollution in agricultural and rural areas, and also produce huge economic, environmental and social benefits. Taking Tianjin as an example, the production and comprehensive benefits of these four types of pollution sources are evaluated by building models. The results showed that in 2016, the production of domestic waste, domestic sewage, crop straw and livestock manure in Tianjin were 1.31 million tons, 38.9 million tons, 3.74 million tons and 1.53 million tons. Through comprehensive utilization, these pollution sources can produce a total economic benefit of about 2.36 billion yuan, which can reduce greenhouse gas emissions by 1.94 million tons. The total amount of N and P emissions from manure to soil can be reduced by 10.8 thousand tons. In order to improve the utilization rate of renewable resources and control non-point source pollution in agricultural and rural areas, this paper proposes to construct BMPs system, control the source and end of pollution sources from engineering and non-engineering measures. Finally, some suggestions are put forward to improve the ecological environment of agriculture and rural areas.
Published Version
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