生态环保视域下城市环境工程污水治理措施

当今时代,我国经济发展更上一层楼,各大城市发展面貌焕然一新,为了能够在最大程度上促进城市建设的发展,最主要的工作就是做好污水治理工作。目前对于工业废水和生活污水的排放标准不断提高,在治理方面也提出了更加严格的要求。随着工业和城市的不断发展,城市每天都有大量的污水被排放掉,为了有效做好污水的处理能力和实现可持续发展,一定要重视城市环境的治理工作,利用更好的方式在最大程度上提高水资源的利用率。基于此,本文重点针对生态环保视域下城市环境工程污水治理措施展开研究。

水中悬浮物测定对污水治理措施选择的作用

污水中悬浮物众多,包括泥沙、黏土、微生物、有机物、重金属颗粒等,不同悬浮物含量的污水污染所采取的污水治理措施各不相同,实际污染治理需结合水中悬浮物测定采取有针对性的污水处理措施,因此,对于选择污水治理措施而言,水中悬浮物测定的准确性极为重要。但实际测定中,工作人员常遇进水抽滤困难、悬浮物测定出现负值的现象。为提高水中悬浮物测定精度,本文基于国标测试方法,即重量法,从该方法全流程入手,进行探讨,以试验的形式提出提高水中悬浮物测定精度的策略,以此为相关检测人员提供质控实践措施。

生态环保视域下城市环境工程污水治理措施研究

目前,国家的经济发展进入了一个新的阶段,各个城市都有了崭新的发展面貌,要想最大限度地推动城市的发展,最重要的工作就是做好污水处理工作。随着我国城市污水排放控制水平的提高,城市污水的治理水平也要有相应的提升。在工业化和城市化的发展过程中,每天都会产生很多的污水,要想更好地提高污水的处理能力,从而达到可持续发展的目的,就必须注重对城市环境进行治理,通过更好的方法,最大限度地提升水资源的利用率。因此,本文从生态保环保的角度出发,提出了一系列适合我国国情的污水处理方法。

环境工程中污水治理问题及其对策

城市建设的发展过程中环境相关保护工程不断增加,其要求也越来越高,涉及方面逐渐详细,其中污水处理就是当前环境工程中治理和保护的重点对象.污水处理对于水资源的利用以及环境的保护都具有重要意义,是作为我国环境可持续发展的必然要求以及重要基础,据此,本文将主要围绕环境工程中污水治理问题及措施展开研究讨论.

Composition and distribution of main pollution trace element in water environment of mining subsidence

The impact on these water bodies of the surrounding coal production activities and the power plant through research the content and characteristics of harmful trace elements in coal contained in these water bodies.F,Hg,Se and As these four trace ele- ments increased 0.92%,0.78%,0.70% and 0.81% respectively in Datong mining subsi- dence pool from November 2004 to November 2006;the four elements increased 1.58%, 1.23%,1.08% and 0.92% respectively in Xie'er mining subsidence pool;the four ele- ments increased 1.16%,1.06%,1.02% and 1.01% respectively in Pansan mining sub- sidence pool.The conclusions show that the absolute values of F,Hg,Se and As in mining subsidence pool are relate with their background value,while the increase in their concen- tration and their environment of mine and electricity plant surrounded are closely linked.

Bioremediation potential of spirulina:toxicity and biosorption studies of lead

This study examines the possibility of using live spirulina to biologically remove aqueous lead of low concentration (below 50 mg/L) from wastewater. The spirulina cells were first immersed for seven days in five wastewater samples containing lead of different concentrations, and the growth rate was determined by light at wavelength of 560 nm. The 72 h-EC50 (72 h medium effective concentration) was estimated to be 11.46 mg/L (lead). Afterwards, the lead adsorption by live spirulina cells was conducted. It was observed that at the initial stage (0–12 min) the adsorption rate was so rapid that 74% of the metal was bio- logically adsorbed. The maximum biosorption capacity of live spirulina was estimated to be 0.62 mg lead per 105 alga cells.

Mercury pollution in the Chongqing part of the Three Gorges Reservoir area and its remediation and prevention

Mercury pollution in the Three Gorges Reservoir area of P.R.China merits special attention.We investigated into the current situation in the Chongqing part of the Reservoir area,identified the pollution sources and proposed some suggestions for the remediation and prevention of mercury pollution in this area.Atmospheric mercury in Chongqing was mainly from coal burning and releases of mercury-containing products such as various types of lights and fever thermometers.Urban drainage in Chongqing and Changshou,and runoffs from the high mercury background area in the lower reaches of the Wujiang River contributed most of the mercury in the water of the Yangtze River.A majority of the blame should be laid on mercury and gold mining in the Wujiang valley.We suggested foresting sloping lands to relieve soil erosion and prevent mercury-bearing soil from running into rivers,educational activities to discourage use of mercury-containing products and improved infrastructure to collect mercury-containing wastes for reducing mercury releases,more facilities for treating wastewater and solid waste to accommodate increased requirements of discharge,and growing selected perennial plants in mercury-contaminated land to absorb the mercury in soil.We also suggested concerted operation of a dedicated water-quality monitoring system,reinforced legislation and an effective administrative mechanism to ensure lasting efforts are invested in curbing mercury releases and restoring mercury contaminated land and water in the Reservoir area.

Study on agricultural structure and non-point source pollution: a case in Dapu Town of Yixing City

The water body of Taihu Lake has been eutrophicated because of area-source pollution. 83% of the total nitrogen and 84% of the total phosphorus of the pollutant that have washed into Taihu Lake originated from the fertilizer of crop land, rural animal husbandry and living sewage and rubbish in rural area. The goal of adjusting agricultural structure is to improve agricultural development, and to increase the peasants＇ income by planting non-grain crop, centralizing animal husbandry, and intensifying aquaculture, etc. It is necessary to research on the influences of agriculture industrial structure on area-source pollution. This paper studies a case of Dapu Town in Yixing City, which is a typical drainage place beside Taihu Lake. On the basis of the analysis on the status quo of area-source pollution and agriculture industrial structure in Dapu Town, the conflicts between them are discussed. Non-grain crop production with a great deal of fertilizer and developing aquaculture with a great deal of organic pollutant, which are directly discharged, make area-source pollution more serious and accelerate the eutrophication in Taihu Lake. This paper suggests taking corresponding technological measures and policies, which have been tested in Dapu Town and demonstrated in Taih, Lake area.

Research on ground water pollution by ieacheate of waste dump of open pit coal mine

On the basis of investigation and research on the pollution source and pollution pathway of Yujiagou area,by the ground water quality analysis and the leaching and soaking experiments of the gangue,reliable data were obtained.The experiment results prove that these inorganic salt elements are easily dissolved by the water.The main pollu- tion factors in the ground water are consisted with the main pollution factor in the leading water of the gangue.By synthetically analyzing,a conclusion is shown that the salts in the leacheate of the waste dump of open pit coal mine are the primary pollution source for groundwater of Yujiagou area.An assessment is made about the degree of pollution of the ground water in the study area.