Microalgae‐based biodiesel production in open raceway ponds using coal thermal flue gas: A case of West Bengal,India

India is one of the most populous countries and is the third largest greenhouse gas–emitting nation. Energy security is a serious issue for India as it relies heavily on fossil fuel imports. Biodiesel production using microalgae as feedstock can address both of these issues. In this study, the technical feasibility of microalgae‐based biodiesel production is carried out for a coal thermal power plant (i.e., Budge Budge Thermal Station) in the state of West Bengal, India, using a generic methodology. An oleaginous microalgae species that is tolerant toward flue gas was identified (i.e., Nannochloropsis sp). A 75‐acre open raceway microalgae production plant was designed keeping the costs, energy demand, and CO₂ emissions low. The open raceway pond can use 38 tons of CO₂, produce 19 tons of algal biomass, and treat 9320 m³ of wastewater per acre annually.     

Economic Feasibility Study for Phosphorus Recovery Processes

Phosphorus recovery from wastewater has become a necessity for sustainable development because phosphorus is a non-renewable essential resource, and its discharge into the environment causes serious negative impacts. There are no economic incentives for the implementation of phosphorus recovery technologies because the selling price of rock phosphate is lower than phosphorus recovered from sewage. The methodologies used to determine the feasibility of such projects are usually focused on internal costs without considering environmental externalities. This article shows a methodology to assess the economic feasibility of wastewater phosphorus recovery projects that takes into account internal and external impacts. The shadow price of phosphorus is estimated using the directional distance function to measure the environmental benefits obtained by preventing the discharge of phosphorus into the environment. The economic feasibility analysis taking into account the environmental benefits shows that the phosphorus recovery is viable not only from sustainable development but also from an economic point of view.     

农民工工伤保险先行赔付机制的可行性研究

由于我国现行工伤保险赔付机制的不完善,致使农民工在出现工伤之后由于企业没有缴费而得不到救助。为改变这种状况,现在政府推行的扩大工伤缴费覆盖面和简化工伤受理补偿的程序,固然能够取得一些成效,而配套实行先行赔付的机制,会更为便于操作和更为直接有效。这种机制的实质是,克服传统行政管理的不足,真正运用社会化的方式,实现工伤员工享受工伤补偿的普惠性,促使用人单位、政府和司法有关部门能够把工伤社会保障的责任切实承担起来。     

环境水体中油的采样工具的设计及其可行性研究

由于油在水中呈不均匀分布的特性,所以有关环境水体中油的采样工具,一直是环保部门关注的焦点。为此提出了“理想（或称假想）水柱”的概念,并依此设计出一种在环境监测工作中使用的便携式测水中油用采样器,适用于工业废水、生活污水及污染的地表水的采取。其特点是,一个底部可开闭的采样器,采样器中的采样瓶（包括瓶底衬盖、瓶底盖）与内拉杆、外套管通过螺纹联接,移动内拉杆、外套管,便可以方便地采取一定面积下的含油水柱。采样瓶装卸简单,运输方便,在实验室中可将其直接用作操作瓶。用这种采样器,计算结果将更接近真实情况。本装置已于９２ 年１２ 月３０日获国家发明专利,专利号：８９１０２４７１．９,证书号：１６３８１。     

Economic and financial analysis on rainwater harvesting for agricultural irrigation in the rural areas of Beijing

Since 2006, around 600 rainwater harvesting systems have been constructed for agricultural irrigation in Beijing. The financial and economic implications of using these systems are discussed less. It is important to understand the effectiveness of the investments spent on the rainwater harvesting systems. The paper aims to analyze economic and financial performance of the constructed rainwater harvesting systems in rural areas of Beijing through the method of cost benefit analysis. The economic analysis focuses on determining the contribution of rainwater harvesting systems to the development of society, carried out from the point of view of government. The financial analysis allows comparison of the financial implications of using groundwater with using rainwater for agricultural irrigation from the point of view of individual participant, namely the local farmers. The results show that the rainwater harvesting systems are economically feasible. This means rainwater harvesting have positive effects for society. However, the financial feasibility of rainwater harvesting systems depends on the charge for groundwater and on the size of the rainwater harvesting systems. If groundwater is not charged, the rainwater harvesting systems are not financially feasible. If groundwater is charged at 2 Yuan/m³, only large size systems are financially feasible while small and middle sizes systems are not financially feasible. Under these circumstances, only large systems can run smoothly, while farmers may not use the small and medium-size systems.     

环境监测业务服务外包可行性依据的探讨

经济发达地区企业众多,公众对于环境关注度高,环境监管力度大,环境监测业务量巨大,需要通过服务外包缓解监测业务的供需矛盾。但是开展服务外包的部分环境监测单位受环境监测工作性质的限制,对服务外包、分包和转包的定义不明,对服务外包的原则难以把握,服务外包的绩效并不明显。本文从服务外包、分包和转包的定义出发,探讨了环境监测服务外包的概念,对服务外包的类型进行了分类,初步提出了环境监测业务服务外包可行性的依据,并以昆山市为例,对各类监测业务服务外包的可行性进行了分析,由此为环境保护主管部门进行环境监测管理提供参考,也为环境监测的市场化发展提供一些有益的借鉴。     

人工湿地治理小流域污染可行性浅析

介绍了人工湿地系统的概念及其去污机理,结合实际案例,分析了工程实施后的经济效益和环境效益,进而探讨了人工湿地治理小流域污染的可行性。     

上海市污泥集装化运输可行性研究

随着上海市生活垃圾集装化运输系统的逐步完善和发展,上海市污泥的集装化运输逐渐被提上日程。本文通过对上海市中心城区的10座城市污水处理厂的污泥产量、污泥含水率、污泥运输道路和装卸环境等进行系统调研,综合分析和研究了上海市各污水处理厂污泥集装化运输的可行性,并进一步研究了污泥性质对集装化运输的影响。结果表明,上海市中心城区仅白龙港污水处理厂含水率约为60%的深度脱水污泥符合污泥集装化运输的要求;深度脱水污泥性质较为稳定,对各种钢材料的腐蚀性为0.00016~0.00125 mm/a,对集装化运输影响较小,但污泥释放的氨气浓度高达173.66 mg/m3,影响集装化运输,需采取水雾喷洒等措施进行控制。     

输配气场站采用太阳能发电的技术可行性研究

以成都市为例对四川地区的气象条件进行分析,根据日均气象辐射量计算太阳能的理论发电量,并根据某配气站实际电能消耗情况进行理论计算,对比得出：选择最大输出功率为24kW的山特3C3—30KSUPS作为逆变器,2组并联电压384V的电池组,太阳能电池板阵列面积达到187m。以上,可满足样本配气站的日常用电需求。     

磨溪天然气净化厂中水回用可行性探讨

文章对磨溪天然气净化厂外排废水的来源、水量、水质、处理工艺和达标情况进行了研究,探讨了工厂外排废水处理的中水回用的可行性,证明磨溪净化厂中水可用于厂内绿化,既可减少污染物排放,降低能耗,又可增加新鲜水资源,经济和环境效益明显。