Emergy as embodied energy based assessment for local sustainability of a constructed wetland in Beijing

被引:103
作者
Chen, B. [1 ,2 ]
Chen, Z. M. [1 ]
Zhou, Y. [3 ]
Zhou, J. B. [1 ]
Chen, G. Q. [1 ]
机构
[1] Peking Univ, Dept Mech, Natl Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China
[2] Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Sci & Pollut, Beijing 100875, Peoples R China
[3] Transform Ecoenvironm Solut Ltd, Beijing 100078, Peoples R China
关键词
Emergy as embodied solar energy; Sustainability; Constructed wetland; Wastewater treatment; WASTE-WATER TREATMENT; SELF-ORGANIZATION; SYSTEMS; TRANSFORMITY; FLOW; PERSPECTIVES; CONSUMPTION; EFFICIENCY; BIOSPHERE; ECOLOGY;
D O I
10.1016/j.cnsns.2007.05.035
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
Ecological treatment engineering has been widely accepted as an artificially designed work to deal with the deteriorating ecological environment with low energy and resource consumption. To measure the energy and resource consumption and environmental support contained in the constructed wetland as a kind of ecological treatment engineering, emergy as embodied solar energy based assessment is performed and relative emergy-based indices including emergy yield ratio (EYR), emergy load ratio (ELR), emergy sustainability index (ESI), net economic benefit index (Np), and renewable percentage index (Pr), are also modified to evaluate the local sustainability of the constructed wetland in this paper. A case study on Longdao River constructed wetland compared with those of some earlier conventional treatment systems indicate that more local renewable resources and less ecological cost are involved, thus promoting the economic benefit due to less energy and resource consumption and simultaneously lowering the environmental stress of the treatment system on the local areas. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:622 / 635
页数:14
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