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Browsing by Author "Zhao, Y.Q."

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An alternative arrangement of gravel media in tidal flow reed beds treating pig farm wastewater

Sun, Guangzhi ; Zhao, Y.Q. ; Allen, Stephen (Springer, 2007-01)

The effect of using coarse grain in the upper layer of a gravel-based reed bed is investigated. The aim for testing the “anti-sized” arrangement of gravel media is to seek a solution for the practical problem of medium ...
Alum sludge-based constructed wetland system for enhanced removal of P and OM from wastewater : concept, design and performance analysis

Babatunde, A.O. ; Zhao, Y.Q. ; Zhao, X.H. (Elsevier, 2010-08)

The concept, design and performance analysis of a four-stage novel constructed wetland system (CWs) capable of enhanced and simultaneous removal of phosphorus (P) and organic matter (OM) from wastewaters is described. Alum ...
Anti-sized reed bed system for animal wastewater treatment : a comparative study

Zhao, Y.Q. ; Sun, Guangzhi ; Allen, Stephen (Elsevier, 2004-07)

Two separate sets of reed bed systems were operated in parallel for the purpose to study a comparative behaviour of high strength animal wastewater treatment. Each system consisted of five-stage gravel-based reed beds. The ...
Application of constructed wetland for urban lake water purification : trial of Xing-qing Lake in Xi’an city, China

Cui, F. ; Zhou, Q. ; Wang, Y. ; Zhao, Y.Q. (Taylor & Francis, 2011-06)

A comprehensive review of the current water pollution status in China has indicated that the urban lakes in Chinese cities have suffered from serious pollution and in high risk of eutrophication although the pollution ...
Characteristics and mechanisms of phosphate adsorption on dewatered alum sludge

Yang, Y. ; Zhao, Y.Q. ; Babatunde, A.O. ; Wang, L. ; Ren, Y.X. ; Han, Y. (Elsevier, 2006-09)

The adsorption characteristics of phosphate adsorption on the dewatered alum sludge were identified as a function of pH and ion strengths in solution. In addition, adsorption mechanisms were investigated by conducting batch ...
Characterization of aluminium-based water treatment residual for potential phosphorus removal in engineered wetlands

Babatunde, A.O. ; Zhao, Y.Q. ; Burke, A.M. ; Morris, M.A. ; Hanrahan, J.P. (Elsevier, 2009-10)

Aluminium-based water treatment residual (Al-WTR) is the most widely generated residual from water treatment facilities worldwide. It is regarded as a by-product of no reuse potential and landfilled. This study assessed ...
Co-conditioning of the anaerobic digested sludge of a municipal wastewater treatment plant with alum sludge : benefit of phosphorus reduction in reject water

Yang, Y. ; Zhao, Y.Q. ; Babatunde, A.O. ; Kearney, P. (Water Environment Federation, 2007-12)

In this study, alum sludge was introduced into co-conditioning and dewatering with an anaerobic digested activated sludge to examine the role of the alum sludge in improving the dewaterbility of the mixed sludge and also ...
Comprehensive analysis of step-feeding strategy to enhance biological nitrogen removal in alum sludge-based tidal flow constructed wetlands

Hu, Y.S. ; Zhao, Y.Q. ; Zhao, X.H. ; Kumar, J.L.G. (Elsevier, 2012-05)

Step-feeding strategies have been extensively studied and comprehensively analyzed in this study for a four-stage alum sludge-based tidal flow constructed wetlands (AlS-TFCWs) system. Enhanced total nitrogen removal of 83% ...
Conditioning of aluminium-based water treatment sludge with Fenton’s reagent : effectiveness and optimising study to improve dewaterability

Tony, Maha A. ; Zhao, Y.Q. ; Fu, J.F. ; Tayeb, Aghareed M. (Elsevier, 2008-06)

Alternative conditioning of aluminium-based drinking water treatment sludge using Fenton reagent (Fe2+/H2O2) was examined in this study. Focuses were placed on effectiveness and factors to affect such novel application of ...
Constructed wetlands for environmental pollution control : a review of developments, research and practice in Ireland

Babatunde, A.O. ; Zhao, Y.Q. ; O'Neill, M. ; O'Sullivan, B. (Elsevier, 2008-01)

For the purpose of synthesizing a compendium of efforts aimed at environmental pollution control through the use of constructed wetlands systems (CWs) in Ireland, a detailed review of CWs was undertaken. Emphasis was placed ...
Constructed wetlands using aluminium-based drinking water treatment sludge as P-removing substrate : should aluminium release be a concern?

Babatunde, A.O. ; Kumar, J.L.G. ; Zhao, Y.Q. (RSC Publishing, 2011-06)

This study investigated an important issue of aluminium (Al) release in a novel reuse of Al-based water treatment sludge (Al-WTS) in constructed wetland system (CWs) as alternative substrate for wastewater treatment. Al-WTS ...
Constructive approaches towards water treatment works sludge management : an international review of beneficial re-uses

Babatunde, A.O. ; Zhao, Y.Q. (Taylor & Francis, 2007-03)

Till date, virtually all known drinking water processing systems generate an enormous amount of residual sludge, and what else to do with this rapidly increasing 'waste' stream in an economic and environmentally sustainable ...
Decolouration of H2SO4 leachate from phosphorus-saturated alum sludge using H2O2 and advanced oxidation processes in phosphorus recovery strategy

Zhao, X.H. ; Zhao, Y.Q. (Taylor & Francis, 2009-11)

As a part of attempt for phosphorus (P) recovery from P-saturated alum sludge, which was used as a low-cost P-adsorbent in treatment reed bed for wastewater treatment, decolouration of H2SO4 leachate obtained from previous ...
Development of alum sludge-based constructed wetland : an innovative and cost-effective system for wastewater treatment

Zhao, Y.Q. ; Babatunde, A.O. ; Zhao, X.H. ; Li, W.C. (Taylor & Francis, 2009-05)

This paper describes (in a summarised manner) a research attempt to integrate the dewatered alum sludge, a residual by-product of drinking water treatment process, into a constructed wetland (CW) system for the purpose of ...
Dewatered alum sludge : a potential adsorbent for phosphorus removal

Yang, Y. ; Tomlinson, D. ; Kennedy, S. ; Zhao, Y.Q. (IWA Publishing, 2006-06)

Alum sludge refers to the by-product from the processing of drinking water in Water Treatment Works. In this study, groups of batch experiments were designed to identify the characteristics of dewatered alum sludge for ...
Diurnal fluctuations in oxygen release from roots of Acorus calamus Linn in a modeled constructed wetland

Dong, C. ; Zhu, W. ; Gao, M. ; Zhao, L.F. ; Huang, J.Y. ; Zhao, Y.Q. (Taylor & Francis, 2011-01)

The detailed mechanisms of oxygen release from the roots of plants in constructed wetlands (CW) remains unclear. This study investigated the variation of root oxygen release rate, and the effect of photosynthesis during ...
Diurnal fluctuations in root oxygen release rate and dissolved oxygen budget in wetland mesocosm

Dong, C. ; Zhu, W. ; Zhao, Y.Q. ; Gao, M. (Elsevier, 2011-05)

To assess the role of plants for oxygen offering in constructed wetlands, this study experimentally evaluated the amount of root oxygen release rate using mass balance method. The mass balance calculation is based on the ...
Effectiveness of a drinking-water treatment sludge in removing different phosphorus species from aqueous solution

Razali, Melanie ; Zhao, Y.Q. ; Bruen, Michael (Elsevier, 2007-07)

Drinking-water treatment sludge (DWTS) produced at water treatment plants is an inescapable by-product and has long been treated as a waste for landfill. In this study, a series of batch adsorption tests were conducted ...
Effects of livestock wastewater variety and disinfectants on the performance of constructed wetlands in organic matters and nitrogen removal

Hu, Y.S. ; Kumar, J.L.G. ; Babatunde, A.O. ; Zhao, X.H. ; Zhao, Y.Q. (Springer, 2011-09)

Background, aim and scope: Treatment performance of constructed wetlands (CWs) is largely dependent on the characteristics of the wastewater. Although livestock wastewater is readily biodegradable in general, its variety ...
Enhanced removal of organic matter and ammoniacal-nitrogen in a column experiment of tidal flow constructed wetland system

Sun, Guangzhi ; Zhao, Y.Q. ; Allen, Stephen (Elsevier, 2005-01-26)

This study investigated the efficiency of a four-stage tidal flow constructed wetland system for the removal of organic matter and ammoniacal-nitrogen from diluted piggery wastewater. The results demonstrated that the ...