Influence of the stone organization to avoid clogging in horizontal subsurface-flow treatment wetlands

Morales, Luis E. Mendoza; Franco, M.; Garvi, Dolores; Martínez, Julián Lebrato

doi:10.1016/j.ecoleng.2013.01.008

Cited by 18 publications

(6 citation statements)

References 16 publications

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“…After three operational years, the same enhanced performance was observed in the present study, which indicated that the optimized multilayer configuration can promote stable and positive effect on pollutants removal. The corresponding values were slightly lower that values observed three years ago, especially for CW1, which may due to solid accumulation and clogging (Blazejewski & Murat-Blazejewska, 1997;Morales et al, 2013). Additionally, higher pollutants removal abilities after June may be due to higher temperature (Fig.…”

Section: Water Quality and Pollutants Removalmentioning

confidence: 72%

“…Theoretically, substrate configuration can be improved by placing finer media with low hydraulic conductivity on the top and coarser media with high hydraulic conductivity at the bottom, which should prevent short-circuit of water flow on the surface and decrease dead zones at the bottom. It is believed that this substrate configuration enables a natural and even water flow, which prevents insalubrious clogging of the CWs (Knowles et al, 2011;Morales et al, 2013). Furthermore, the uniform water flow pattern would improve pollutants biodegradation due to high biofilm/pollutant contact possibility.…”

Section: Introductionmentioning

confidence: 99%

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Effect of multilayer substrate configuration in horizontal subsurface flow constructed wetlands: assessment of treatment performance, biofilm development, and solids accumulation

Ding

Lyu

Bai

et al. 2017

Environ Sci Pollut Res

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This study investigates the influence of multilayer substrate configuration in horizontal subsurface flow constructed wetlands (HSCWs) on their treatment performance, biofilm development, and solids accumulation. Three pilot-scale HSCWs were built to treat campus sewage and have been operational for 3 years. The HSCWs included monolayer (CW1), three-layer (CW3), and six-layer (CW6) substrate configurations with hydraulic conductivity of the substrate increasing from the surface to bottom in the multilayer CWs. It was demonstrated the pollutant removal performance after a 3-year operation improved in the multilayer HSCWs (49-80%) compared to the monolayer HSCW (29-41%). Simultaneously, the multilayer HSCWs exhibited significant features that prevented clogging compared to the monolayer configuration. The amount of accumulated solids was notably higher in the monolayer CW compared to multilayer CWs. Further, multilayer HSCWs could delay clogging by providing higher biofilm development for organics removal and consequently, lesser solids accumulations. Principal component analysis strongly supported the visualization of the performance patterns in the present study and showed that multilayer substrate configuration, season, and sampling locations significantly influenced biofilm growth and solids accumulation. Finally, the present study provided important information to support the improved multilayer configured HSCW implication in the future.

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Section: Water Quality and Pollutants Removalmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Effect of multilayer substrate configuration in horizontal subsurface flow constructed wetlands: assessment of treatment performance, biofilm development, and solids accumulation

Ding

Lyu

Bai

et al. 2017

Environ Sci Pollut Res

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“…On the other hand, sediment is rich in humus and a large number of microbes which are responsible for absorption, migration and transformation of pollutants during operation (Fu et al, 2013;Martinez et al, 2013). However, the present research is focused on how to prevent clogging (De la Varga et al, 2013;Pozo-Morales et al, 2013) and the mechanisms underlying the substrate clogging (Ye et al, 2014;Hua et al, 2013).…”

Section: Introductionmentioning

confidence: 94%

Organic matter transplant improved purification performance of newly built constructed wetlands

Guo

Zhang

et al. 2015

Ecological Engineering

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“…Therefore, they can be used in powder or coarse form as low-cost adsorbent compared to zeolite and TiO 2 (Figure 7a, b). Generally, gravels, sand stones, activated carbon and pebbles are common materials used in underground flow wetland to construct gravel bed to filter suspended solids from wastewater and allow biofilm attachment on them (Pozo-Morales et al, 2013). However, Shih and Chang (2015) utilized waste oyster shells as a bio-medium ( Figure 7a) to purify domestic wastewater.…”

Section: Biofilter Medium For Wastewater Treatmentmentioning

confidence: 99%

Mini-review of waste shell-derived materials’ applications

Hart

2020

Waste Manag Res

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This mini-review reports curbing waste shells (i.e. seashells, eggshells, snail shells, etc.), environmental health issues and liabilities by using them as material for heterogenous catalysts, blended cement manufacture, concrete aggregate, ceramics and plastics additives, biofilter medium and biomedical applications. The traditional materials used in the manufacture of these products could be relatively cheap; however, there are considerable environmental issues (i.e., ecological damage, disruption of eco-system and air contamination) as well as intense energy consumption associated with the exploitation of depleting natural resources. Waste shells are a renewable and cheap alternative, and will simultaneously decrease manufacturing cost while reducing their burden on the environment. This paper emphasizes environmental sustainability by summarizing articles published on various applications of waste shell-derived biomaterials. The properties of waste shell-derived biomaterials are presented and discussed. The materials’ properties suggest they are similar to limestone and their biological–natural origin and the high calcium carbonate content with a trace amount of other mineral elements makes them highly favorable for cement production, heterogenous catalysts and hydroxyapatite manufacture for biomedical and wastewater treatment applications. The purpose of this work is to offer new perspectives and direction for future research on waste shell-derived biomaterials while existing areas of applications demanding scale up are highlighted.

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Influence of the stone organization to avoid clogging in horizontal subsurface-flow treatment wetlands

Cited by 18 publications

References 16 publications

Effect of multilayer substrate configuration in horizontal subsurface flow constructed wetlands: assessment of treatment performance, biofilm development, and solids accumulation

Effect of multilayer substrate configuration in horizontal subsurface flow constructed wetlands: assessment of treatment performance, biofilm development, and solids accumulation

Organic matter transplant improved purification performance of newly built constructed wetlands

Mini-review of waste shell-derived materials’ applications

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