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Towards the development of a novel construction solid waste (CSW) based constructed wetland system for tertiary treatment of secondary sewage effluents
Date Issued
2011-06
Date Available
2011-08-26T13:55:03Z
Abstract
This study was conducted to examine the possibility of using construction solid waste (CSW), an inevitable by-product of the construction and demolition process, as the main substrate in a laboratory scale multi-stage constructed wetland system (CWs) to improve phosphorus (P) removal from secondary sewage effluent. A tidal-flow operation strategy was employed to enhance the wetland aeration. This will stimulate aerobic biological processes and benefit the organic pollutants decomposition and nitrification process for ammoniacal-nitrogen (NH4+-N) removal. The results showed that the average P concentration in the secondary sewage effluent was reduced from 1.90 mg-P/L to 0.04 mg-P/L. CSW presents excellent P removal performance. The average NH4+-N concentration was reduced from 9.94 mg-N/L to 1.0 mg-N/L through nitrification in the system. The concentration of resultant nitrite and nitrate in the effluent of the CSW based CWs ranged from 0.1 to 2.4 mg-N/L and 0.01 to 0.8 mg-N/L, respectively. The outcome of this study has shown that CSW can be successfully used to act as main substrate in CWs. The application of CSW based CWs on improving N and P removals from secondary sewage effluent presents a win-win scenario. Such the reuse of CSW will benefit both the CSW disposal and nutrient control from wastewater. More significantly, such the application can transfer the CSW from a ‘waste’ to ‘useful’ material and can ease the pressure of construction waste solid management. Meanwhile, the final effluent from the CSW-based CWs can be used as non-potable water source in landscape irrigation, agriculture and industrial process.
Sponsorship
Not applicable
Other Sponsorship
Department of Science and Technology of Shaanxi Province, China
National Science and Technology Project for Water Pollution Control
National Natural Science Foundation of China
Type of Material
Journal Article
Publisher
Taylor & Francis
Journal
Journal of Environmental Science and Health, Part A
Volume
46
Issue
7
Start Page
758
End Page
763
Copyright (Published Version)
Taylor & Francis Group, LLC
Subject – LCSH
Construction and demolition debris
Constructed wetlands
Sewage--Purification--Nutrient removal
Web versions
Language
English
Status of Item
Peer reviewed
ISSN
1093-4529 (Print)
1532-4117 (Online)
This item is made available under a Creative Commons License
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