CONSTRUCTION OF A NEW WATER METABOLIC SYSTEM BASED ON APPROPRIATE SEPARATION OF WATER COLLECTING AND DISCHARGE AREA

本研究的目的是提出城市水代谢系统的设计和建设，通过水资源的优化利用和一次用水的再利用，以适当的质量和数量支持各种用水。因此，完成了以下研究课题。(1)污水深度处理系统的发展提出了厌氧流化颗粒床生物反应器系统作为污水深度处理系统。该体系能有效地去除氮磷化合物。此外，通过引入第二反硝化池并向絮凝污泥中投加反硝化剂，最终出水总氮和总磷的浓度分别为0.5 ~ 1.0mg/l和0.01 ~ 0.05mg/l。因此，富营养化潜力可以大大降低。(2)自然净化系统与先进的废水处理系统合作;当先进的污水处理系统 ...更多信息 采用混凝等先进的污水处理工艺处理污水处理厂的出水，藻类生长势（AGP）由120- 200 μ gCHLa/l降至50 μ gCHLa/l以下。当混凝出水在水库中储存40天后，藻类生物量与AGP值相比非常低（20- 5.50 μ gCHLa/l），这表明富营养化潜力的降低增强了自然净化能力。(3)通过土壤渗滤改善水质：蓄水池出水经土壤渗滤后，SS、TOC和总氮均能被物理和生物去除，尤其是硝化反硝化过程对含氮物质的去除率达90%以上，自然净化系统与污水深度处理工艺相结合，实现了中水回用。此外，土壤入渗过程提高了水质。少

The objective of this study wa to propose the design and construction of urban water metabolic system which supports various water consumption with appropriate quality and quantity by an optimal use of water resource with reuse of once used water. Therefore, the following subjects of research was accomplished.(1) Development of advanced wastewater treatment system ; The authors had proposed an anaerobic fluidized pellet bed bioreactor system as an advanced sewage wastewater treatment system. This system could be effectively nitrogenous and phosphorus compounds. In addition, by the introduction of 2nd denitrification tank and with feeding to flocculated sewage sludge, the concentration of total nitrogen and total phosphorus in the final effluent was between 0.5 and 1.0mg/l, and between 0.01 and 0.05mg/l respectively. Consequently, eutrophication potential could be greatly decreased.(2) Natural purification system in cooperation with an advanced wastewater treatment system ; When the adv … More anced wastewater treatment process such as coagulation process was applied to the effluent from sewage treatment works, the algal growth potential (AGP) was decreased to less than 50mug CHLa/l from 120-200mugCHLa/l. Moreover, when the effluent from the coagulation process was stored in the reservoir at 40 day of retention time, the amount of algal biomass was extremely low (20-5.50mugCHLa/l) comparing the value of AGP.This result indicated that the decrease of eutrophication potential enhanced the natural purification capacity.(3) Improvement of water quality by soil infiltration ; When the effluent from the storing reservoir was infiltrate into the soil, SS,TOC and total nitrogen could be removed physically and biologically, especially nitrogenous substances was removed above 90% by nitrification and denitrification process.Consequently, the natural purification system combined with the advanced wastewater treatment process enabled the reuse of once used water. Moreover, the soil infiltration process enhanced the water quality. Less