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A strain of the high-accumulating bacterium P5 was isolated from the pond sludge. The bioreactor of immobilized cell was made up with cinder grain as the carrier. The experimental results show that under the optimal operating conditions, the phosphorus removal rate was 99.30% and the removal rate of CODCr was 92.14% to simulated wastewater with 20mg/L phosphorus (PO43−-P) for 30 minutes and the phosphorus...
The paper achieved identifying the Agricultural Non-point Source Pollution Critical Source Area in Xingkai Lake watershed using pollution index method with the help of RS and GIS. The conclusions were that: (1) the high pollution risk area mainly clustered in the border of ZhiYi, Baipaozi, Xingkaihu and Liumao Towns and the west southern area of Yangmu Town, and the serious soil erosion and high livestock...
An annual study had been conducted on the physical and chemical factors, as well as water quality assessment, of 4 different types of reservoirs along the Yangtze River watershed in China during the period of 2006–2008. The reservoir water temperature range during the year was 5.5–31.0 °C, an average of 16.5 °C; There was obvious temporal and spatial variation in DO, DO was sufficient in all water...
In this paper, water environment influence is simulated effectively from Beilun fifth stage engineering construction based on precise flow field of Beilun harbor. owing to piled wharf structure, engineering construction on non-pollution ecology hydrodynamic environment influence is small, only engineering local has certain influence; During the influence of suspended solids is primary, and affect...
The factors which influence the coal mining environment security assessment are analyzed, based on the statistical data and field survey results. The method of AHP is adopted to establish an environmental security assessment index system. Then the security management and rehabilitation measures of mine environment are proposed.
The construction of urban ecological security is much concerned with the continuous urbanization process. This paper established an urban ecological security evaluation system by employing PSR(Pressure-Status-Response)method, on the basis of the previous studies about ecological security evaluation by other researchers. The weight of each index was defined utilizing the AHP(Analytical Hierarchy Process)...
An evaluation index system was established to assess wastewater reclamation and reuse project. Considering the different characteristics and main factors of the centralized and decentralized wastewater reclamation and reuse engineering, the index system includes 13 individual indices in five categories: water quantity, water quality, techniques, economy and management. After the index system having...
According to the Xixi wetland conservation project, Xixi National Wetland Park is divided to 3 functional zones, the 4000 patches in the park is categorized to 7 patch types, and the usage of landscape metrics at both the class level and the landscape level studies characteristics of the landscape spatial pattern. The results indicate: there are numerous patches in the park, landscape richness is...
Based on the water quality investigation data from August in 2009 to July in 2010, the water environment quality of Zhanjiang Mangrove Nature Reserve was assessed using single water quality parameter model, integrated water quality index model, organic pollution index model and eutrophication assessment model. The results showed that the key pollutants were dissolved inorganic nitrogen (DIN), dissolved...
Based on environment statistics data from 1992–2008, the changing tendency, types, causes and directly economic losses of national environmental pollution accidents were analyzed, and the high risk areas of water and air pollution accidents were studied by using Supermap. The results indicated that the number of annual environmental accidents was maximally 3001 times in 1994 and minimally 462 times...
The pollutants, which were brought by the living and producing of the village in Lake Baiyangdian, would have some effects on surrounding water quality. During May 2009 to March 2010, the research evaluated and analyzed the eutrophication state of five selected sampling points. Experimental result indicated that, the water around the village appeared eutrophication phenomenon overall, fish and poultry...
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