Small Scale Constucted Wetland Treatment Systems 在线电子书 pdf 下载 txt下载 epub 下载 mobi 下载 2024

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Wallace, S. 作者

Intl Water Assn

译者

2006-11 出版日期

304 页数

$ 209.50 价格

Pap

丛书系列

9781843397281 图书编码

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发表于2024-11-13

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Small Scale Constucted Wetland Treatment Systems 在线电子书 epub 下载 mobi 下载 pdf 下载 txt 下载 2024

Small Scale Constucted Wetland Treatment Systems 在线电子书 pdf 下载 txt下载 epub 下载 mobi 下载 2024

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The expanding use of decentralized wastewater management has resulted in an increased interest in small-scale wetland treatment systems. However, there is limited information available on the use, distribution of and performance of these small-scale systems. The purpose of this study was to address this knowledge gap by developing criteria for the feasibility, design, operation, and maintenance of small-scale wetland treatment systems. Information on 1,789 existing small-scale wetland treatment systems in 19 countries was collected. This data indicates that 81% of small-scale constructed wetlands use subsurface flow. The median size range for free water surface (FWS) wetlands was 389 m^3/day (103,000 gpd), while for vegetated submerged bed (VSB) wetlands it was only 2.6 m^3/day (687 gpd). Monitoring data from the assembled small-scale wetland database was used to develop sizing criteria for FWS and VSB wetlands. Loading rates and corresponding effluent quality were developed for BOD, TSS, TKN, phosphorus, and fecal coliform bacteria. Where there was adequate data, the variation in monthly vs. annual average effluent concentration was assessed to provide a factor-of-safety approach to wetland sizing. Information on internal processes, hydraulic design, operation, maintenance, cost, and industrial applications of constructed wetlands is also presented in this report.

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