Reading guidance：Taiyuan city sewage treatment plant into operation 6, the Beijiao municipal sewage treatment plant, River northwest of the central sewage treatment Co. Ltd., Yangjiapu sewage purification plant sewage

    Taiyuan city sewage treatment plant into operation 6, the Beijiao municipal sewage treatment plant, River northwest of the central sewage treatment Co. Ltd., Yangjiapu sewage purification plant sewage treatment amount accounted for more than 80%. According to the detailed rules for the implementation of the national "comprehensive renovation of city environment index 11th Five-Year" quantitative assessment, will use the "city sewage the treatment rate of" instead of "city sewage treatment rate" as the city sewage treatment situation quantitative assessment indicators, "one of the important goals of environmental protection during the 11th Five-Year" Taiyuan city to achieve, is the city centralized sewage treatment rate should be increased from 50.4% to more than 90%. Therefore, the Beijiao municipal river, northwest of the central. Yangjiapu sewage treatment plant respectively were upgraded or expanded, and the planning of new sewage treatment plant. All projects after the completion of 4 sewage treatment plants. Capacity of about 560 thousand T. Taiyuan City daily sludge generated about 500t, the annual production of wet sludge nearly 200 thousand T.  
   Yangjiapu sewage purification of total nitrogen, total phosphorus and total potassium sludge, the average mass fraction of 2.78%, respectively, 2.65%, 0.65%; Beijiao sewage treatment plant sludge in total nitrogen, total phosphorus, total potassium average concentration was 1.87%, respectively, 0.811%, 0.678%; River northwest of the central sewage purification of total nitrogen, total phosphorus in sludge Co., total the average potassium concentration was 2.24%, respectively, 1.30%, 0.654%, to meet the quality of sludge used in land improvement, landscaping mud and other purposes. In addition to sludge in Beijiao waste water treatment plant in nickel, other heavy metals content does not exceed the "pollutant emission standards of urban sewage treatment plant (GB 18918 - 2002) agricultural limits. Some of the elements from the perspective of attention resources of heavy metals, the new standard of" urban sewage treatment plant pollutant discharge standard "(gb18918 - 2002) in the agricultural pollution control standard limit control indicators" in agricultural sludge Pollution Control Standards > (GB 84 - 4284), as an indispensable trace element for plant growth of copper, zinc control standards relaxed a lot.  The heavy metals in the sludge may still exist some risks in the land use of the heavy metal lead and chromium content showed a rising trend, especially the content of nickel in Beijiao sewage treatment plant sludge exceeds the limit, from the source control of industrial waste water into Beijiao. Many sewage treatment plants, drainage monitoring departments should intensify monitoring management of industrial waste water drainage the enterprise, so as to achieve the "sewage discharged into the city sewer water quality standards" (CJ 343 - 2010) before discharge. At the same time should be applied, those entering the human food chain of crops, do not allow the use of sludge as fertilizer. Should establish strict use, management, monitoring and monitoring system, the region of interest in soil and groundwater, surface water, crops and other related factors and changes, to ensure the safety and effectiveness.
    Therefore, if the work of sludge treatment and disposal in Taiyuan city to do, need to do (1) according to the existing national standards, industry standards and selection of sludge treatment and disposal technology; (2) the concentrated sludge of aerobic composting treatment, and after appropriate processing after Yuan Linpei made soil, can realize sludge stabilization and reduction, harmless, organic combination of resources, is an important means to implement the circular economy and the concept of sustainable development, has broad prospects for development, provides a new idea for city sludge treatment and disposal; (3) the drainage monitoring work, strengthen the drainage permit system. The high concentration of industrial waste water discharge enterprises to make the first treatment, the treated waste water to achieve "sewage discharged into the city sewer water quality standards" (CJ 343 - 2010) before discharge. At the same time, should also increase the sludge monitoring and management efforts; (4) of sludge Centralized disposal. Sludge disposal equipment costs higher, each city should plan to construction of sludge disposal center, to avoid duplication; (5) positive development of sludge disposal of new technology, new materials and new equipment, and gradually make the disposal of sludge as resources like sewage treatment, industrialization.
 
 

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