Effects of land use change and water reuse options on urban water cycle

The aim of this article was to study the effects of land use change and water reuse options on an urban water cycle. A water cycle analysis was performed on the Goonja drainage basin, located in metropolitan Seoul, using the Aquacycle model. The chronological e ects of urbanization were first assessed for the land uses of the Goonja drainage basin from 1975 to 2005, where the ratio of impervious areas ranged from 43% to 84%. Progressive urbanization was identified as leading to a decrease in evapotranspiration (29%), an increase in surface runo (41%) and a decrease in groundwater recharge (74%), indicating a serious distortion of the water cycle. From a subsequent analysis of the water reuse options, such as rainwater use and wastewater reuse, it is concluded that wastewater reuse seemed to have an advantage over rainwater use for providing a consistent water supply throughout the year for a country like Korea, where the rainy season is concentrated during the summer monsoon.     

曝气生物滤池在中水回用中的应用

介绍了一种新型曝气生物滤池的工艺原理、结构类型、特征及其在中水回用中的研究进展,探讨了曝气生物滤池技术在中水回用中的应用前景.     

膜生物反应器出水深度处理及回用技术

针对膜生物反应器对难生化降解物质去除率不高,出水中仍残留部分污染物,对水安全和回用造成一定影响这一不足,综述了膜生物反应器出水深度处理及回用技术,并指出了今后的发展方向.     

Initiating automotive component reuse in Malaysia

As the production of local vehicles increases, the impact of end-of-life vehicles (ELVs) wastes to the environment will also increase. ELVs recovery including reuse, remanufacture, and recycle apparently become a strategy in solving this environmental problem. This study identifies the existing conditions of automotive reuse in Malaysia by conducting some interviews in selected local automotive and automotive component manufacturers. Results from the interviews indicated that reuse of automotive components in newly manufactured vehicles has never been practiced by the selected companies. However, there is interest among respondents in developing automotive components for after-market reuse. Some strategies were proposed in this study to initiate automotive components reuse in the local automotive manufacturers including the establishment of the end-of-life directive, enhance research and development on design for reuse and increase reusability and economic benefits of reuse.     

Wastewater reclamation and reuse in China: Opportunities and challenges

The growing water stress both in terms of water scarcity and quality deterioration promotes the development of reclaimed water as a new water resource use. This paper reviewed wastewater reuse practices in China, and the opportunities and challenges of expanding reclaimed water use were analyzed. Rapid urbanization with the increasing of water demand and wastewater discharge provides an opportunity for wastewater reuse. The vast amount of wastewater discharge and low reclaimed water production mean that wastewater reuse still has a great potential in China. Many environmental and economic benefits and successful reclamation technologies also provide opportunities for wastewater reuse. In addition, the overall strategy in China is also encouraging for wastewater reuse. In the beginning stage of wastewater reclamation and reuse, there are many significant challenges to expand wastewater reuse in China including slow pace in adopting urban wastewater reuse programs, the establishment of integrated water resources management framework and guidelines for wastewater reuse programs, incoherent water quality requirements, the limited commercial development of reclaimed water and the strengthening of public awareness and cooperation among stakeholders.     

城市污水回用系统研究的整数规划模型

本文介绍研究工作中建立的城市污水回用系统规划的0—1整数规划数学模型、重点探讨了在规划的污水收集系统、污水处理厂位置、处理等级已确定的条件下,如何选择再生水回用对象、回用规模,追加的深度处理规模等经济合理、技术可行的再生水分配系统。通过某地区城市污水土地处理回用系统的实例研究,验证了所建模型的合理性与实用性。     

合肥化肥厂造气废水的处理

采用渠式磁化器与CFC型斜板沉淀器组合工艺,处理造气废水,该废水含SS285.5mg/L,CN~-8.06mg/L,S~(2-)1.61mg/L,处理后的水可循环回用。     

利用酒糟生产饲料蛋白的菌种选育

为了提高酒糟蛋白质的含量和粗纤维的降解,本研究选菌种３０株,以白酒糟为原料筛选出优质饲料蛋白菌株８５０２,８５０３和８５０５三株。用微生物液体发酵法,经研究发现,以８５０３和８５０５组成的多菌发酵体系,使酒糟初始蛋白含量由２３．０％。     

光合细菌和螺旋藻对黄泔水净化与利用初探

应用光合细菌将黄泔水中的有机物降解转化为无机氮磷后养殖螺旋藻。结果表明,在实验条件下光合细菌对黄泔水ＣＯＤｃｒ的去除率可达７０％,处理后的黄泔水用甲壳质絮凝澄清后加入螺旋藻并曝气进行培养,藻生长周期为２２ｄ,生长速率为２０－３０ｍｇ／Ｌ．Ｄ。藻体蛋白质含量平均为５２．６ｇ／１００ｇ游离氨基酸平均含量为２．４ｇ／１００ｇ。     

树脂吸附法处理邻甲苯胺生产废水的研究

在最佳工艺条件下,采用NDA-804树脂对邻甲苯胺生产废水进行吸附-脱附实验。原废水经吸附处理后,邻甲苯胺去除率和CODcr去除率均大于99％．树脂脱附率接近100％。高浓度脱附液可以回收邻甲苯胺,达到了废水治理与资源化的效果。