Evaluation of Long-Term Wastewater Treatment Performances in Multi-Soil-Layering Systems in Small Rural Communities
Evaluation of Long-Term Wastewater Treatment Performances in Multi-Soil-Layering Systems in Small Rural Communities
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小型农村社区多土壤分层系统的长期废水处理性能评估
DOI：
10.1155/2019/1214368
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发表时间：
2019
影响因子：
2.2
通讯作者：
Masunaga Tsugiyuki
中科院分区：
文献类型：
--
作者：
Sato Kuniaki;Wakatsuki Toshiyuki;Iwashima Noriko;Masunaga Tsugiyuki
多层土壤（MSL）废水处理系统由呈砖状排列的土壤单元（土壤混合物块，SMB）组成，周围是可渗透的沸石层或大小均匀的交替颗粒，可实现高水力负荷率。本研究评估了已在小型农村社区运行 17 至 20 年的 MSL 系统的性能。该系统自安装以来已经过去了20年，但有机物处理性能仍然很高。氮去除率高于传统土壤系统。其中两个 MSL 系统继续表现出较高的除磷性能，而第三个系统的吸附能力相对较低，需要进一步研究。处理性能很大程度上取决于 MSL 系统的结构。看来，改善结构以提高 SMB 中废水与土壤之间的接触效率对于提高处理性能非常重要。现有废水处理系统与 MSL 系统的结合使用，可以有效地长期防止环境污染。
Multi‐soil‐layering (MSL) wastewater treatment systems consist of soil units (soil mixture blocks, SMB) arranged in a brick‐like pattern surrounded by permeable layers of zeolite or alternating particles of homogeneous sizes that allow for a high hydraulic loading rate. This study evaluated the performances of MSL systems that have been operating for 17 to 20 years in small rural communities. Even though 20 years had passed since this system was installed, high organic matter treatment performance continued. Nitrogen removal was higher than with conventional soil systems. Two of the MSL systems continued to show high phosphorus removal performances, whereas in the third system, the adsorbing capacity was relatively low, requiring further investigation. Treatment performances were largely dependent upon the structure of the MSL systems. It appeared that improving the structure to enhance the contact efficiency between the wastewater and the soil in SMB was important for enhancing treatment performances. The combined use of existing wastewater treatment systems with the MSL system was effective for preventing environmental pollution over a long period.
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DOI：
10.1088/1757-899x/107/1/012016
发表时间：
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期刊：
IOP Conference Series: Materials Science and Engineering
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影响因子：
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