Life cycle assessment of integrated wastewater treatment systems with constructed wetlands in rural areas

2017 ◽  
Vol 148 ◽  
pp. 527-536 ◽  
Author(s):  
Carlos A. Lutterbeck ◽  
Lourdes T. Kist ◽  
Diosnel R. Lopez ◽  
Filipe V. Zerwes ◽  
Ênio L. Machado
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Constructed Wetlands ◽  
Rural Areas ◽  
Wastewater Treatment Systems

scholarly journals Life-cycle assessment of decentralized solutions for wastewater treatment in small communities

2021 ◽  
Author(s):  
N. Lourenço ◽  
L. M. Nunes
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Activated Sludge ◽  
Constructed Wetlands ◽  
Economies Of Scale ◽  
Environmental Benefits ◽  
Impact Categories ◽  
Standard Life ◽  
The Impact

Abstract This study benchmarks vermifiltration (VF) as secondary wastewater treatment in three nature-based decentralized treatment plants using life-cycle assessment. The comparison is justified by the comparatively easier and cheaper operation of VF when compared to more traditional technologies, including small rate infiltration (SRI), constructed wetlands (CW), and activated sludge (AS). Standard life cycle assessment was used and applied to three case studies located in southern Europe. Material intensity during construction was highest for VF, but impacts during operation were lower, compensating those of the other phases. Impacts during the construction phase far outweigh those of operation and dismantling for facilities using constructed wetlands and activated sludge, when the number of served inhabitants is small, and due to lack of economies of scale. VF used as secondary treatment was shown to contribute to reducing the environmental impacts, mainly in constructed wetlands and activated sludge. The replacement of CW by VF seems to bring important environmental benefits in most impact categories, in particular in the construction phase. The replacement by VF in facilities with SRI seems to result in the improvement of some of the impact categories, in particular in the operation phase. As for dismantling, no conclusive results were obtained.

scholarly journals Comparative life cycle assessment of aerobic treatment units and constructed wetlands as onsite wastewater treatment systems in Australia

2021 ◽  
Author(s):  
Giovani Rodolfo Alatrista Gongora ◽  
Ray Hangyong Lu ◽  
Ali El Hanandeh
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Aerobic Treatment ◽  
Treatment Unit ◽  
Global Warming Impact ◽  
Onsite Wastewater ◽  
Onsite Wastewater Treatment Systems ◽  
Onsite Wastewater Treatment ◽  
Wastewater Treatment Systems

Abstract Life Cycle Assessment was used to evaluate onsite wastewater treatment systems (OWTS): aerobic treatment unit (ATU) with reinforced concrete (C.ATU) and HDPE (H.ATU) tank; and constructed wetland (CW) with three biochar concentrations in the substrate (0%; 10, and 20% v:v), dubbed CW.BC0, CW.BC10 and CW.BC20, respectively. CML 2001 in SimaPro® was used to evaluate the impacts of the treatment of 1 m3 wastewater. The OWTS were compared on their overall environmental performance scores (OEP). ATUs have higher impacts on human toxicity, eutrophication, freshwater and marine ecotoxicity. The CW.BC20 has the lowest global warming impact (GWP) while CW.BC0 has the highest. Electricity consumption was the largest contributor to the impacts of the ATUs. PVC pipes, coir peat, geomembrane, and electronic devices were the biggest contributors to the impacts of the CWs. The OEP of the CWs were almost a third of the ATUs’ (6.07E-03). Changes in electricity sources were tested according to the 2030-Australian targets; increasing renewables share improves the OEP of ATUs by 39%; nevertheless, CWs continue to outperform the ATUs. Variations in biochar biodegradation has small effect on the OEP of CWs; being relevant only to GWP. This study provides a reference to policy makers for better evaluation of OWTS.

scholarly journals Correction to “Life-Cycle Assessment of Gingko-Wood Three-Dimensional Membrane for Wastewater Treatment”

ACS Omega ◽  
2020 ◽  
Vol 5 (42) ◽  
pp. 27733-27733
Author(s):  
Faiza Niaz ◽  
Qasim Khan ◽  
Mustafa Ali ◽  
Wenxing Shen
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Three Dimensional

Life Cycle Assessment of Urban Wastewater Treatment

2014 ◽  
Vol 535 ◽  
pp. 346-349
Author(s):  
Mei Wang ◽  
Ming Yang ◽  
Jun Liu ◽  
Jian Fen Li
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Wastewater Treatment Plant ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Urban Wastewater ◽  
Urban Sewage ◽  
Urban Wastewater Treatment ◽  
Whole Life Cycle

Effect and benefits of a product or service could be analyzed and evaluated by life cycle assessment during the whole life cycle. Urban sewage treatment plants could improve and control urban water pollution escalating, but it also had certain harm to environment. Effect and benefits of urban wastewater treatment plant A and B were analyzed and evaluated, 13 factors were selected, and comprehensive benefits were researched quantificationally using the method of analytic hierarchy process. It found that urban wastewater treatment plant A who applied A/O process had better benefits than urban wastewater treatment plant B who applied BIOLAK process.

History and Current Situation of Night Soil Treatment Systems and Decentralized Wastewater Treatment Systems in Japan

2010 ◽  
Vol 5 (4) ◽  
Author(s):  
X.M. Yang ◽  
A. Morita ◽  
I. Nakano ◽  
Y. Kushida ◽  
H. Ogawa
Keyword(s):  
Wastewater Treatment ◽  
Rural Areas ◽  
Urban Areas ◽  
Domestic Wastewater ◽  
Soil Treatment ◽  
Decentralized System ◽  
Decentralized Wastewater Treatment ◽  
Rapid Economic Growth ◽  
Unique System ◽  
Wastewater Treatment Systems

In Japan, night soil, or black water, was formerly used as fertilizer for agriculture. However, during the rapid economic growth that took place after 1960, chemical fertilizers began to be adopted for agriculture and night soil was almost abandoned. How to treat the excess of night soil then became a big challenge to tackle. From that time a variety of night soil treatment technologies have been developed and the Japanese government has actively promoted the construction of night soil treatment facilities all over the country. As measures for domestic wastewater treatment, sewerage systems were spread in high-density urban areas, while a decentralized system called johkasou was diffused in rural areas with low population density. Johkasou is a unique system that was devised in Japan and mainly treats domestic wastewater on-site. Night soil treatment systems and decentralized wastewater treatment systems used in Japan are introduced in this paper, in the hope that the experience acquired in Japan will contribute to improve the sanitation conditions in other countries.

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