Evaluation of Water and Wastewater Systems by Energy Aspect and Economic Costing.

本研究的目的是了解日本污水处理厂能源方面的实际状况，并根据场地规范调查可能的污水处理替代方案的选择/评估策略。采用经济成本法对污水处理系统的建设进行了可行性研究。结果，通过对日本污水处理厂的建设和运维的经济成本函数，显示了适用于现场规范的可行处理系统的评估策略。本研究的下一个目标是估计污水处理污染的经济成本。在本研究中，污水处理污染的经济成本估算被定义为“社会成本”。对几种污水处理系统的单位体积污水污染的社会成本进行了估计。将社会成本和治疗成本相加，得到综合成本。结果表明，利用社会成本估算方法可以很容易地识别出社会成本与水处理方案之间的关系。运用成本效益分析的评价方法，可以认识到污水处理系统的建设和维护成本对用户和管理部门的意义。

The purposes of this study are to learn actual states of the energy aspect on sewage works in Japan and to investigate a selecting/evaluating strategy of possible wastewater treatment alternatives in response to site specification. A feasibility study on constructing a wastewater treatment system is carried out, employing an economic costing function. As a result, an evaluated strategy of a feasible treatment system applicable to site specification is shown by use of an economic costing function of construction and O&M on sewage works in Japan.The next objective of this study is to estimate economic costs of pollution by sewage treatment. In this study, an economic cost estimation of pollution by sewage treatment is defined as "social cost." The social cost of pollution to unit volume of treated wastewater is estimated for several sewage treatment systems. By summing social cost and treatment cost, a synthetic cost is obtained. As a result, it is shown that the relationship between social costs and watewater treatment alternatives can be recognized with ease by use of the estimating method of social cost.The meaning of the construction and maintenance costs of a wastewater treatment system for users and an administrative can be recognized by use of the evaluation method of cost-benefit analysis.