Remediation of synthetic greywater in mesocosm—Scale floating treatment wetlands

Abed, Suhail N.; Almuktar, Suhad A.A.A.N.; Scholz, Miklas

doi:10.1016/j.ecoleng.2017.01.043

Cited by 60 publications

(25 citation statements)

References 69 publications

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“…However, the existence of P. australis in the purification of SGW significantly (p < 0.05) decreased the pH value of the outflow compared to the inflow pH. The drop in pH can be explained by the production of carbon dioxide during rhizome breathing and/or organic acids [14], which are by-products of biodegradation of organic substances in water by microorganisms [52,53].…”

Section: Resultsmentioning

confidence: 97%

“…Biofilms that developed on the root and rhizome systems of P. australis and on the vessel walls led to improved biological decomposition enhancing the removal of TSS, turbidity and colour [14,56]. The correlations between turbidity and TSS, turbidity and colour, and TSS and colour were positive and significant; r = 0.783 (p = 0.013), r = 0.767 (p = 0.016), and r = 0.767 (p = 0.016), respectively.…”

Section: Turbidity Total Suspended Solids and Colour Evaluationsmentioning

confidence: 99%

“…2c-e). However, there was a nutrient imbalance for LC-SGW, which was not sufficient for the organisms' survival and consequently limited PO 4 -P removal [13,14]. Therefore, the outflow from treated SGW systems was agitated in this study before sampling to encourage solids to suspend or dissolve [16,38].…”

Section: Nutrient Assessmentsmentioning

confidence: 99%

“…Among different treatment technologies, constructed wetlands have been a widely accepted option for treatment and recycling of greywater [7,14] due to their ability to meet the requirements of public health, aesthetics, sustainability, technical design and affordability [8]. However, removal of phosphorus is only modest in constructed wetlands [15].…”

Section: Introductionmentioning

confidence: 99%

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Phytoremediation performance of floating treatment wetlands with pelletized mine water sludge for synthetic greywater treatment

Abed

Almuktar

Scholz

2019

J Environ Health Sci Engineer

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Purpose Buckets containing floating reed (Phragmites australis) simulated floating treatment wetlands (FTWs) and were used to improve the remediation performance of synthetic greywater (SGW). The aim of the study was to investigate the behaviour of FTWs for treatment of key contaminants within artificial greywater. Methods Pelletized ochre based on acid mine water sludge was introduced to selected FTWs, because of its capability in sequestration phosphorus and other trace elements. The impact of the following four operational variables were tested in the experimental set-ups of the FTWs (four replicates each): pollutant strength (high-(HC) and low-(LC) concentrations), treatment time (2-or 7-days of hydraulic retention time (HRT)), presence or absence of macrophytes (P. australis) and cement-ochre pellets.Results The results showed that 5 − day biochemical oxygen demand (BOD) and chemical oxygen demands (COD) were significantly (p < 0.05) reduced in all wetlands. Nitrate-nitrogen (NO 3 -N) concentrations were significantly (p < 0.05) higher, and those measurements for PO 4 -P were significantly (p < 0.05) lower than the corresponding ones determined for the influent. The existence of ochre pellets with P. australis significantly (p < 0.05) decreased B, Cd, Cr, Cu, Mg, Ni and Zn concentrations, but increased Al, Ca, Fe and K concentrations in the effluent, with the exception of sodium (Na). Conclusions The FTW performances can be improved by utilising ochre-cement pellets to increase the pH of greywater. The presence of P. australis acts as a buffer to neutralise the pH of SGW. Rhizomes and biofilms mitigate increases in turbidity, TSS and colour values.

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Section: Resultsmentioning

confidence: 97%

Section: Turbidity Total Suspended Solids and Colour Evaluationsmentioning

confidence: 99%

Section: Nutrient Assessmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phytoremediation performance of floating treatment wetlands with pelletized mine water sludge for synthetic greywater treatment

Abed

Almuktar

Scholz

2019

J Environ Health Sci Engineer

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“…Thus, many traditional and innovative methods with physical, chemical and biological processes have been applied to alleviate eutrophication and improve water quality over the past decades [14,15]. Among those methods, eco-technologies (i.e., artificial floating islands) have been widely applied around the world due to low cost, easy maintenance, safe and high-efficiency [16,17]. An enhanced artificial floating island is a soilless planting structure that was constructed with the floating mats, aquatic plants, artificial biofilm carrier and related ecological communities (e.g., algae, biofilms, zooplankton and small invertebrates).…”

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confidence: 99%

An Enhanced System with Macrophytes and Polyurethane Sponge as an Eco-Technology for Restoring Eutrophic Water: A Pilot Test

Wang

Yin

Cai

et al. 2019

Water

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Water eutrophication is one of the most serious environmental problems in urban lakes and ponds due to the excessive nutrients. To deal with this problem, the development of methods for supporting ecological rehabilitation has been undertaken. Meanwhile, the trophic interactions during rehabilitation also have been analyzed. In this study, a new technique was employed to solve the water eutrophication problems in an urban pond. To evaluate the water eutrophication at a pilot scale, an enhanced artificial floating-type biological treatment system (FBTS) composed of a floating bed, macrophyte, artificial biofilm carrier (polyurethane sponge) and aerator could be used as equipment for urban pond remediation. In addition, FBTS was employed to decrease the total nitrogen (TN), ammonia-nitrogen (NH3-N), total phosphorus (TP) and chemical oxygen demand (COD) in water. Meanwhile, the changes of water qualities were monitored in the remediation process, and differences in phytoplankton functional group diversity were also registered. Cyanobacteria would decrease after the removal of P, and the diatom assemblage composition changed. The dominant species Cyanophyta were transformed to co-existed with Bacillariophyta, Pyrrophyta and Chlorophyta due to the improvement of water quality. Consequently, this new FBTS could be a promising eco-technology for the removal of nitrogen and phosphorus from eutrophic water, and even could promote the phytoplankton succession.

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Phytoremediation Using Aquatic Plants

Fletcher

Willby

Oliver

2020

Concepts and Strategies in Plant Sciences

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Remediation of synthetic greywater in mesocosm—Scale floating treatment wetlands

Cited by 60 publications

References 69 publications

Phytoremediation performance of floating treatment wetlands with pelletized mine water sludge for synthetic greywater treatment

Phytoremediation performance of floating treatment wetlands with pelletized mine water sludge for synthetic greywater treatment

An Enhanced System with Macrophytes and Polyurethane Sponge as an Eco-Technology for Restoring Eutrophic Water: A Pilot Test

Phytoremediation Using Aquatic Plants

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