Effect of the inlet–outlet positions on the hydraulic performance of horizontal subsurface-flow wetlands constructed with heterogeneous porous media

Suliman, F.; Futsæther, Cecilia Marie; Oxaal, Unni; Haugen, Lars Egil; Jenssen, Petter D.

doi:10.1016/j.jconhyd.2006.04.009

Cited by 42 publications

(21 citation statements)

References 22 publications

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“…Several features, such as wetland shape (Persson, 2000;Wörman and Kronnäs, 2005), inlet and outlet location (Persson et al, 1999;Suliman et al, 2006), wetland bottom topography (Kjellin et al, 2007;Lightbody et al, 2007) and vegetation distribution (Persson et al, 1999;Dal Cin and Persson, 2000;Serra et al, 2004;Kjellin et al, 2007;Keefe et al, 2010), can affect hydraulic characteristics of FWS wetlands. Persson et al (1999) and Persson (2000) showed that an island located near the wetland inlet enhanced the distribution of incoming water and thus the hydraulics.…”

Section: Introductionmentioning

confidence: 99%

Tracer behaviour and analysis of hydraulics in experimental free water surface wetlands

Bodin

Mietto

Ehde

et al. 2012

Ecological Engineering

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Section: Introductionmentioning

confidence: 99%

Tracer behaviour and analysis of hydraulics in experimental free water surface wetlands

Bodin

Mietto

Ehde

et al. 2012

Ecological Engineering

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“…The detailed description of the system is found in Heistad et al (2006) The construction was based on the same system elements as the LWA CWs but with improvements based on field experience. Major improvements include a more even distribution of septic tank effluent in the biofilter (Heistad et al, 2001) and a higher degree of filter media utilization by increased flow control (Suliman et al, 2006) in the smaller up‐flow filter unit. If this system performs well for pathogen reduction, it may contribute to a more widespread use of filter‐based systems in the future due to reduced investment costs and land requirements.…”

mentioning

confidence: 99%

Long‐term Hygienic Barrier Efficiency of a Compact On‐site Wastewater Treatment System

et al. 2009

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The long-term use of a filter-based, on-site wastewater treatment system increases nutrient discharge to receiving waters and may reduce its hygienic barrier efficiency. The main purpose of this research was to assess the hygienic barrier efficiency and the associated health risks of an on-site system that had exceeded its 5-yr design capacity with respect to phosphorus (P) removal. The system was investigated for bacteria and virus removal and assessed with respect to potential health risks in relation to reuse of effluent for irrigation. The system consists of a septic tank, a pressure-dosed vertical flow biofilter, and an up-flow filter unit with lightweight clay aggregates. The total P concentration in the effluent had increased gradually from initially <0.1 mg P L(-1) during the first 2 yr of operation to 1.8 mg P L(-1) after 5.3 yr. Escherichia coli was used as an indicator organism for fecal bacteria removal, whereas bacteriophages phiX174 and Salmonella typhimurium phage 28B (S.t. 28B) were used to model enteric virus removal. An overall decrease in E. coli removal occurred from a complete (approximately 5.6 log10) reduction during the first 3 yr of operation to 2.6 log10 reduction. The removal amounts of the bacteriophages phiX174 and S.t. 28B were 3.9 and 3.7 log10, respectively. Based on removal of S.t. 28B, the risks of rotavirus infection and disease for the investigated scenarios were above the acceptable level of 10(-4) and 10(-3), respectively, as defined by the World Health Organization.

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“…5). It has been shown that the hydraulic conductivity in wetlands increases with increased particle size, decreases as uniformity of particle size increases, and is more uniform in saturated sands [32][33]. Difference in particle size was discounted as the primary basis for the disparities in SHC because, apart from the fact that each sand batch was highly similar, group EF sand particles were slightly smaller than group BCD [2% more clay, 2.2% more fine sand, 2.6% less medium sand and 2.8% less coarse sand, but the SHC of group BCD was lower than that of group EF.…”

Section: Hydraulic Propertiesmentioning

confidence: 99%

Minor differences in sand physicochemistry lead to major differences in bacterial community structure and function after exposure to synthetic acid mine drainage

Welz

Ramond

Cowan

et al. 2014

Biotechnol Bioproc E

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The formation of environmentally toxic acidic waste from mining activities is a world-wide problem. Neutralization of this waste can be accomplished by physicochemical and/or biological means. In this short-term study, synthetic acid mine drainage was added to sandfilled mesocosms containing silica-dominated (quartz) sand. Glucose was added as a carbon source for microbial iron and/or sulphate reduction. Replicates contained two separate batches of sand obtained from the same quarry site. The investigations used to assess and compare the chemical and biological functioning of the replicates included system hydraulic conductivity measurements, sand chemistry, effluent chemistry and bacterial community fingerprinting. Minor differences in composition of the sand, including the levels of available nutrients and micronutrients, resulted in major differences in measured parameters. 2 Significant differences in effluent chemistry were found in systems containing different batches of sand. It was demonstrated that the characteristics of the sand and the presence of acid mine drainage impacted the bacterial community structure and function. The importance of the physical substrate on the selection of functional microbial communities in systems remediating AMD should not be under-estimated. The physical substrate should be carefully selected and it may be prudent to include small-scale comparative studies in each particular setting prior to full-scale implementation.

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Effect of the inlet–outlet positions on the hydraulic performance of horizontal subsurface-flow wetlands constructed with heterogeneous porous media

Cited by 42 publications

References 22 publications

Tracer behaviour and analysis of hydraulics in experimental free water surface wetlands

Tracer behaviour and analysis of hydraulics in experimental free water surface wetlands

Long‐term Hygienic Barrier Efficiency of a Compact On‐site Wastewater Treatment System

Minor differences in sand physicochemistry lead to major differences in bacterial community structure and function after exposure to synthetic acid mine drainage

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