RECYCLED BRICK AND CONCRETE AGGREGATES FROM CONSTRUCTION AND DEMOLITION WASTE MIXED AS SUBSTRATES IN CONSTRUCTED WETLAND FOR TREATMENT OF MICRO-POLLUTED WATER AND ITS APPLICATIONS

LI Yunqing; LI Haiyan; LIU Zhaoying; ZHANG Yihui; JIAN Meipeng; WU Liyuan; LI Kun

doi:10.13205/j.hjgc.202407013

Volume 42 Issue 7

Jul. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(7): 120-128

LI Yunqing, LI Haiyan, LIU Zhaoying, ZHANG Yihui, JIAN Meipeng, WU Liyuan, LI Kun. RECYCLED BRICK AND CONCRETE AGGREGATES FROM CONSTRUCTION AND DEMOLITION WASTE MIXED AS SUBSTRATES IN CONSTRUCTED WETLAND FOR TREATMENT OF MICRO-POLLUTED WATER AND ITS APPLICATIONS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(7): 120-128. doi: 10.13205/j.hjgc.202407013

Citation:

LI Yunqing, LI Haiyan, LIU Zhaoying, ZHANG Yihui, JIAN Meipeng, WU Liyuan, LI Kun. RECYCLED BRICK AND CONCRETE AGGREGATES FROM CONSTRUCTION AND DEMOLITION WASTE MIXED AS SUBSTRATES IN CONSTRUCTED WETLAND FOR TREATMENT OF MICRO-POLLUTED WATER AND ITS APPLICATIONS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(7): 120-128. doi: 10.13205/j.hjgc.202407013

Citation:

LI Yunqing, LI Haiyan, LIU Zhaoying, ZHANG Yihui, JIAN Meipeng, WU Liyuan, LI Kun. RECYCLED BRICK AND CONCRETE AGGREGATES FROM CONSTRUCTION AND DEMOLITION WASTE MIXED AS SUBSTRATES IN CONSTRUCTED WETLAND FOR TREATMENT OF MICRO-POLLUTED WATER AND ITS APPLICATIONS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(7): 120-128. doi: 10.13205/j.hjgc.202407013

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RECYCLED BRICK AND CONCRETE AGGREGATES FROM CONSTRUCTION AND DEMOLITION WASTE MIXED AS SUBSTRATES IN CONSTRUCTED WETLAND FOR TREATMENT OF MICRO-POLLUTED WATER AND ITS APPLICATIONS

doi: 10.13205/j.hjgc.202407013

LI Yunqing¹,
LI Haiyan^1,2,
LIU Zhaoying¹,
ZHANG Yihui³,
JIAN Meipeng^{1,2
,
,},
WU Liyuan^1,2,
LI Kun^2,4

1. Beijing Energy Conservation & Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2. Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
3. Beijing Yizhuang Environmental Technology Group Co., Ltd., Beijing 100176, China;
4. Radio, Film & TV Design and Research Institute, Beijing 100045, China

Received Date: 2023-07-06
Available Online: 2024-12-02

Abstract

Abstract

To improve the purification capacity of recycled aggregates from construction and demolition waste for actual micro-polluted water, a mixture of recycled brick aggregate (RBA) and recycled concrete aggregate (RCA) in two proportions was used as substrates to construct two vertical flow constructed wetland (VFCW) systems, namely CW1 (80% RBA+20% RCA) and CW2 (50% RBA+50% RCA). A control group with natural aggregates (zeolite, lava rock, limestone) as substrates was set up. The results showed that the TP removal efficiencies during the stable operation period of CW1 and CW2 were 57.5% and 42.7%, respectively, which were 38.9% and 24.1% higher compared to the control group. The NH₃-N, TN, and COD removal effect of CW2 with an increased proportion of RCA was close to that of the system with natural aggregates, with removal efficiencies of 70.2%, 16.9%, and 63.5%, respectively, achieving the effect of treating pollution with waste materials. The calculation of the Nemerow pollution index further demonstrated that increasing the proportion of RCA was conducive to improving the comprehensive pollution control efficiency of the systems with recycled aggregates, which was better than the systems with traditional natural aggregates. The environmental risk assessment indicated that the environmental risk level of effluent each pollutant in the recycled aggregate systems during the stable operation phase was at a desirable level, with a low impact on the receiving water. The economic analysis showed that the CW2 had the lowest cost and significant benefits. The VFCWs using a mixture of 50% RBA and 50% RCA as the substrate was successfully applied in the Wenyu River Wetland Park in Beijing. When the influent water quality exceeded the limit of the Class Ⅳ of Environmental Quality Standards for Surface Water (GB 3838—2002), the effluent NH₃-N, TP, and COD of each outlet point all met the Class Ⅲ water quality standard.
- construction and demolition waste,
- recycled aggregates,
- vertical flow constructed wetland,
- water purification,
- demonstration applications

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References(29)

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