Anh T N Q, Harada H, Fujii S, Anh P N, Lieu P K, Tanaka S
Graduate School of Global Environmental Studies, Kyoto University, Yoshida-honmachi, Sakyo, Kyoto 606-8501, Japan E-mail:
Department of Environmental Science, Hue University of Sciences, 77 Nguyen Hue, Hue City, Vietnam.
Water Sci Technol. 2016;73(1):69-77. doi: 10.2166/wst.2015.463.
Characteristics of waste and wastewater management can affect material flows. Our research investigates the management of waste and wastewater in urban areas of developing countries and its effects on phosphorus flow based on a case study in Hue Citadel, Hue, Vietnam. One hundred households were interviewed to gain insight into domestic waste and wastewater management together with secondary data collection. Next, a phosphorus flow model was developed to quantify the phosphorus input and output in the area. The results showed that almost all wastewater generated in Hue Citadel was eventually discharged into water bodies and to the ground/groundwater. This led to most of the phosphorus output flowing into water bodies (41.2 kg P/(ha year)) and ground/groundwater (25.3 kg P/(ha year)). Sewage from the sewer system was the largest source of phosphorus loading into water bodies, while effluent from on-site sanitation systems was responsible for a major portion of phosphorus into the ground/groundwater. This elevated phosphorus loading is a serious issue in considering surface water and groundwater protection.
废弃物与废水管理的特点会影响物质流。我们的研究基于越南顺化古都的案例研究，调查了发展中国家城市地区的废弃物与废水管理及其对磷流的影响。为深入了解生活废弃物与废水管理情况并收集二手数据，我们采访了100户家庭。接下来，开发了一个磷流模型，以量化该地区的磷输入与输出。结果表明，顺化古都产生的几乎所有废水最终都排入了水体以及地面/地下水。这导致大部分磷输出流入水体（41.2千克磷/（公顷·年））和地面/地下水（25.3千克磷/（公顷·年））。下水道系统的污水是水体中磷负荷的最大来源，而现场卫生系统的废水则是进入地面/地下水的磷的主要来源。考虑到地表水和地下水保护，这种磷负荷升高是一个严重问题。
