The rapid development of Chinese rural economy has led to an increasingly serious environmental pollution in rural areas, especially the random discharge of sewage to pollute water sources and endanger the health of villagers. This article combines the existing resources and needs in rural areas to study and establish a rural sewage ecological treatment system involving septic tanks, interception wells, improved integrated treatment equipment and waterlogging ponds, and takes Liutian Village in Shaanxi Province as an example. The system is based on the functional and practical principles from the rainwater and sewage collection system to drainage system, treatment system and recovery system. Ecological, economic and effective solutions are adopted in all aspects after comparative analysis. The input cost of the whole treatment system is relatively low, the effect is better and the functions are more. The sewage treated by this system meets the national emission standards. For rural sewage treatment, the system has good economic, social and ecological value and has broad application and promotion prospects.
In order to solve the problem that the current rural environment value-added benefits are difficult to estimate, based on the emergy theory, this paper built a rural environmental value-added evaluation system with resources, development, space and environmental protection as the main elements, including 18 sub-indicators. This study also quantitatively evaluated the value-added situation of ecological environment in Queshan Village, Shanxi Province, from 2010 to 2015, and put forward development strategies. It is found that from 2010 to 2015, the resource factor decreased from 0.02 to 0.00, the development factor decreased from 0.16 to 0.06, the space factor increased by 0.19 from 0.07, the environmental protection factor decreased from 0.21 to 0.05, and the composite index decreased from 0.61 to 0.31. The results show that the ecological environment of Queshan Village was negative in the evaluation period, and the development showed an imbalance law and an unsustainable development trend. This method constructs a quantitative analysis system for rural environmental value-added evaluation, and has certain theoretical and practical value in rural planning guidance and evaluation.
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