Effects of physical clogging on the performance of a lab-scale vertical subsurface flow constructed wetland system and simulation research

Yang, Mengyao; Lu, Mingzhi; Bian, Hongfeng; Sheng, Lianxi; He, Chunguang

doi:10.1016/j.ecolind.2017.05.058

Cited by 20 publications

(2 citation statements)

References 21 publications

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“…Thus, to obtain a greater absorption of salts using CWt, CWp and CWl in substrate with gravel #2, the depth of the substrate layer must be shallower than that used here, which was proved by the trenches opened at different points of the CWs. However, this would imply in a reduction in the useful life, a behavior that should be better investigated for each species of macrophyte and type of support medium, as proved by Yang et al (2018). who observed a gradual accumulation of the total suspended solids from the influent within substrates, with a concentration of solids accumulated within the system following 180 days of operation of 4.68 g, (2.38 kgm -2 ) and an accumulation rate of 4.76 kg m -2 year -1 ).…”

Section: Physical and Chemical Attributes Of Raw Sewage (Rs) Influent And Effluent Of Cultivated Beds (Cw)mentioning

confidence: 99%

Performance of constructed wetland system using different species of macrophytes in the treatment of domestic sewage treatment

Sandri

Reis

2021

Reveng

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The objective is to assess the initial performance of a constructed wetland system and the development of the macrophyte species cattail(Typha spp.) (CWt), piripiri (Cyperus giganteus) (CWp), and white garland lily (Hedychium coronarium Koehne) (CWl) and an suncultivated (UNc) on the treatment of sewage from toilets and from a restaurant. Changes in hydrogen potential, electrical conductivity, total suspended solids, total solids, biochemical oxygen demand, chemical oxygen demand, turbidity, nitrate, ammonium nitrogen, total phosphate, hydraulic retention time (HRT), and potential evapotranspiration (PET) and the development and adaptation of macrophytes were measured. The surface area of ??each constructed wetland (CW) had a surface area of 16.25 m2 and average volume treated of 0.40 m3 d-1, with continuous variable horizontal subsurface flow equally fed with sewage previously treated in three septic tanks in series, with an individual useful volume of 5.100 L. The PET in CWt, CWp and CWl was higher than that of UNc. The highest pH values were obtained in the effluent of CWp, CWt, and CWl. The use of macrophytes did not influence the EC, TS, BOD5,20, COD, and nitrate were lower and ammonium nitrogen and total phosphate were higher in the effluent of CWs and UNc in relation to the influent. The efficiency indexes that showed a very strong Pearson correlations (> 90%) were pH correlated with N-NH4+, turbidity correlated with COD, TS correlated with EC, and BOD5,20 and COD correlated with NO3-.Piripiri and cattails showed the best development of plants in the second half of CW.

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Section: Physical and Chemical Attributes Of Raw Sewage (Rs) Influent And Effluent Of Cultivated Beds (Cw)mentioning

confidence: 99%

Performance of constructed wetland system using different species of macrophytes in the treatment of domestic sewage treatment

Sandri

Reis

2021

Reveng

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“…Unfortunately, SWISs have the disadvantage of poor performance if clogging occurs. Clogging can be divided into four types: physical clogging (caused by suspended solids) (Yang, 2018;Alem, 2015); bioclogging (caused by accumulated biofilms) (Newcomer, 2016;Hua, 2014); chemical clogging (caused by chemical materials such as carbonate and iron oxide ) (Larroque, 2011; Weidner, 2012); and gas clogging (caused by gas bubbles) (Heilweil, 2013). Currently, researchers are devoted to the study of physical clogging, bioclogging and chemical clogging, but little is known about gas clogging.…”

Section: Introductionmentioning

confidence: 99%

Transport of pore-water oxygen with/without aeration in subsurface wastewater infiltration system

Wang

et al. 2019

WSA

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In this study, three subsurface wastewater infiltration systems (SWISs) at different aeration were set up to study the transport of pore-water oxygen and quantify the amount of trapped gas. Bromide and dissolved oxygen were introduced into SWISs as partitioning tracer and non-partitioning tracer, respectively. A model named CXTFIT based on the convection diffusion equation was used to describe the shape of breakthrough curves for bromide and dissolved air in column experiments. In CXTFIT code, the parameter β obtained from the bromide test ranging from 0.2940 to 0.7600 indicates that the physical non-equilibrium model was relatively suitable for dissolved air transport. Retardation factors obtained by CXTFIT code indicate 2–20% porosity filled with gas. Tracing the transport of air and determining the percentage of porosity filled with trapped gas has lain a foundation for further study on gas clogging in SWISs.

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Experiment research on physical clogging mechanism in the porous media and its impact on permeability

et al. 2020

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Effects of physical clogging on the performance of a lab-scale vertical subsurface flow constructed wetland system and simulation research

Cited by 20 publications

References 21 publications

Performance of constructed wetland system using different species of macrophytes in the treatment of domestic sewage treatment

Performance of constructed wetland system using different species of macrophytes in the treatment of domestic sewage treatment

Transport of pore-water oxygen with/without aeration in subsurface wastewater infiltration system

Experiment research on physical clogging mechanism in the porous media and its impact on permeability

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