An integrated gravity-driven ecological bed for wastewater treatment in subtropical regions: Process design, performance analysis, and greenhouse gas emissions assessment

Zhang, Peng; Huang, Guohe; An, Chunjiang; Fu, Haiyan; Gao, Pan-Feng; Yao, Yao; Chen, Xiujuan

doi:10.1016/j.jclepro.2018.12.027

Cited by 58 publications

(20 citation statements)

References 53 publications

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“…However, the production of OPC is associated with high emissions of carbon dioxide, with one ton of carbon dioxide emitted for each ton of OPC that is produced [4][5][6]. Given that carbon dioxide contributes massively to the formation of greenhouse gases that promote global warming, OPC is not a sustainable material [7]. Better living standards have been achieved globally, thanks to the advances in industry and urbanism.…”

Section: Introductionmentioning

confidence: 99%

“…Better living standards have been achieved globally, thanks to the advances in industry and urbanism. However, these advances have been accompanied by issues of how to best manage industrial and domestic waste [7,8]. This has prompted worldwide initiatives to make waste management more effective, particularly in terms of waste recycling and reuse, as well as to search for viable alternatives to produce sustainable materials (e.g., 'green' concrete, which are materials produced from recycling of landfill waste) [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Glass Silica Waste Nano Powder on the Mechanical and Microstructure Properties of Alkali-Activated Mortars

et al. 2020

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The recycling of millions of tons of glass bottle waste produced each year is far from optimal. In the present work, ground blast furnace slag (GBFS) was substituted in fly ash-based alkali-activated mortars (AAMs) for the purpose of preparing glass bottle waste nano-powder (BGWNP). The AAMs mixed with BGWNP were subsequently subjected to assessment in terms of their energy consumption, economic viability, and mechanical and chemical qualities. Besides affording AAMs better mechanical qualities and making them more durable, waste recycling was also observed to diminish the emissions of carbon dioxide. A more than 6% decrease in carbon dioxide emissions, an over 16% increase in compressive strength, better durability and lower water absorption were demonstrated by AAM consisting of 5% BGWNP as a GBFS substitute. By contrast, lower strength was exhibited by AAM comprising 10% BGWNP. The conclusion reached was that the AAMs produced with BGWNP attenuated the effects of global warming and thus were environmentally advantageous. This could mean that glass waste, inadequate for reuse in glass manufacturing, could be given a second life rather than being disposed of in landfills, which is significant as concrete remains the most commonplace synthetic material throughout the world.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Glass Silica Waste Nano Powder on the Mechanical and Microstructure Properties of Alkali-Activated Mortars

et al. 2020

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“…Durán et al [20] proposed the fuzzy Activity-Based Costing (ABC) method, which can appropriately allocate water treatment costs to the products that generate these activities and waste, and enhance the sustainable development of water resources from an economic perspective. Zhang et al [21] focused on water treatment technology with the intention of making the wastewater produced by agricultural production activities in the subtropical regions sustainable.…”

Section: Introductionmentioning

confidence: 99%

Spatial Heterogeneity of the Impact Factors on Gray Water Footprint Intensity in China

Zhang

Wang

et al. 2020

Sustainability

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The gray water footprint intensity represents the amount of freshwater resources that need dilution of pollutants per unit of economic output, which indicates the relationship among water pollution, water resources and economy. In this paper, the gray water footprint of 31 provinces (autonomous regions) in China was estimated based on different water bodies. The spatial pattern and spatial agglomeration characteristics of gray water footprint in China from 2000 to 2014 were explored from the perspective of spatial autocorrelation. By extending the Stochastic Impacts by Regression on Population, Affluence, and Technology (STIRPAT) model, the impact of the total population, urbanization rate, per capita output value, the proportion of the tertiary industry, environmental pollution control intensity and R&D investment intensity on the degree of gray water footprint intensity are explored, with ridge regression analysis to solve the problem of collinearity affecting factors. Meanwhile, the Geographically Weighted Regression (GWR) model is used to detect the spatial heterogeneity and spatio-temporal variation characteristics of the factors influencing gray water footprint intensity among regions. The study found that from 2000 to 2014, the gray water footprint of 31 provinces and cities in China was unstable; the domestic gray water footprint accounted for the largest proportion; the agricultural gray water footprint was mainly derived from nitrogen fertilizer, and the industrial and domestic gray water footprint was mainly derived from ammonia nitrogen. Water pollution varies from east to west. The total intensity of gray water footprint shows a downward trend, which is related to economic development and improvement of technological level. There is a positive correlation between the urbanization rate and the intensity of the gray water footprint. The total population, the per capita output value, the proportion of the tertiary industry, the intensity of environmental pollution control, the intensity of R&D input and the intensity of the gray water footprint are negatively correlated, and the influencing factors boast obvious spatial heterogeneity. The purpose is to reveal the key factors influencing gray water footprint intensity to ensure the sustainable development of economy, resources and environment through the formulation of regional differences in regulation and control policies.

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“…In recent years, many studies have examined various physical, chemical, and biological processes for greywater reclamation (Yu et al, 2011;Chen et al, 2017;Zhang et al, 2019). Typical physical treatment processes may include coarse sand filtration, soil filtration, or membrane filtration, followed by disinfection (An et al, 2016;McBean et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Biological Treatment for Greywater Reclamation

Chen¹,

Wu²,

Young³

et al. 2020

J ENVIRON INFORM LET

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Greywater reclamation is generally recognized as a viable solution to mitigate the challenges caused by water scarcity, increasing wastewater production, and increasingly stringent wastewater discharge permits. Biological processes may provide lower capital and operating costs, and less sludge production, than comparable physicochemical processes. This paper provides a general overview of the biological treatment processes currently available for greywater reclamation, including: rotating biological contactors, sequencing batch reactors, anaerobic sludge blanket bioreactors, constructed wetlands, membrane bioreactors, and hybrid membrane bioreactors. The advantages, disadvantages, and limitations of each of these technologies were examined in detail. The challenges of using reclaimed greywater were also examined in relation to the long-term sustainability of greywater reclamation. On balance, membrane-based processes were found to be among the most promising technologies for decentralized greywater reclamation, due largely to the quality of their treated water and compact size.

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An integrated gravity-driven ecological bed for wastewater treatment in subtropical regions: Process design, performance analysis, and greenhouse gas emissions assessment

Cited by 58 publications

References 53 publications

Influence of Glass Silica Waste Nano Powder on the Mechanical and Microstructure Properties of Alkali-Activated Mortars

Influence of Glass Silica Waste Nano Powder on the Mechanical and Microstructure Properties of Alkali-Activated Mortars

Spatial Heterogeneity of the Impact Factors on Gray Water Footprint Intensity in China

Biological Treatment for Greywater Reclamation

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