Towards the development of a novel construction solid waste (CSW) based constructed wetland system for tertiary treatment of secondary sewage effluents
|Title:||Towards the development of a novel construction solid waste (CSW) based constructed wetland system for tertiary treatment of secondary sewage effluents||Authors:||Yang, Y.
|Permanent link:||http://hdl.handle.net/10197/3106||Date:||Jun-2011||Online since:||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.||Funding Details:||Not applicable||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||Keywords:||Construction solid waste; Constructed wetland; Nutrient removal; Reuse; Tertiary treatment||Subject LCSH:||Construction and demolition debris
|DOI:||10.1080/10934529.2011.571621||Other versions:||http://dx.doi.org/10.1080/10934529.2011.571621||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Urban Institute Ireland Research Collection|
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection
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