Effect of operating factors on the contaminants removal of a soil filter: multi-soil-layering system
Effect of operating factors on the contaminants removal of a soil filter: multi-soil-layering system
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DOI：
10.1007/s12665-015-4288-8
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发表时间：
2015-03
影响因子：
2.8
通讯作者：
Yidong Guan;Y. Zhang;Chun Zhong;Xiaofeng Huang;Jie Fu;Dongye Zhao
中科院分区：
文献类型：
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作者：
Yidong Guan;Y. Zhang;Chun Zhong;Xiaofeng Huang;Jie Fu;Dongye Zhao
作为一种土壤过滤器，多层土壤分层(MSL)系统与其他一些传统的基于土壤的系统相比具有几个优点，包括较高的水力负荷率(HLR)和较低的堵塞概率。然而，操作因素对MSL性能的影响还没有得到充分的认识，这在一定程度上限制了MSL的进一步应用。本文对关键的运行参数进行了全面的概述，包括堵塞和水力停留时间、曝气、介质组成和结构、温度和C/N比。特别是，堵塞和HLR被广泛讨论，因为在土壤过滤器的寿命中，它们可能比其他因素造成更大的恶化。目前，很少有关于在保持合理的HLR范围和尽量减少堵塞机会之间取得平衡的相关报告。为了填补这一研究空白，本文提出了两种可行的减少堵塞机会的方法，即系统悬浮和/或强化曝气，这将是节省时间和低成本的。此外，为了提高MSL的反硝化能力，提出了基于城市污水处理工艺的出水回用方案，从生化反应的角度提高了MSL的可控性。
As a soil filter, the multi-soil-layering (MSL) system has several advantages over some other conventional soil-based systems, including higher hydraulic load rate (HLR) and lower probability of clogging. However, the role of operating factors on the performance of MSL is insufficiently understood, and this limits its further application to some extent. The present paper provides a holistic overview of the crucial operating parameters, including clogging and HLR, aeration, media composition and structure, temperature, and C/N ratio. In particular, clogging and HLR are discussed extensively, since they could cause much greater deterioration over the lifetime of the soil filter than the other factors. There are currently few relevant reports regarding the balance between maintaining the reasonable range of HLR and minimizing less chance of clogging. To fill this research gap, this paper proposes two applicable ways to reduce the opportunity for clogging, namely, system suspension and/or enhanced aeration, which will be time-saving and low cost. In addition, to increase the denitrification capacity of MSL, effluent recirculation is proposed, a novel recommendation based on the municipal wastewater treatment processes, which could also improve the controllability of MSL from the perspective of biochemical reaction.