Biological denitrification in drinking water using Glycyrrhiza glabra and Arunda donax as the carbon source

Övez, B.; Özgen, Sibel; Yüksel, Mithat

doi:10.1016/j.procbio.2006.02.015

Cited by 91 publications

(28 citation statements)

References 25 publications

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“…-N was bio-oxidated to nitrate (Huang et al 2012). On the other hand, when denitrification was influenced, the removal of TN was limited (Ovez et al 2006). Both A. donax (VFW1) and Canna (VFW2) had strong and welldeveloped roots that provided good conditions for nitrifiers and denitrifiers to enhance nitrification (Huang et al 2012), so the removal rates of NH 4 ?…”

Section: Resultsmentioning

confidence: 99%

Correlation Among Soil Enzyme Activities, Root Enzyme Activities, and Contaminant Removal in Two-Stage In Situ Constructed Wetlands Purifying Domestic Wastewater

Chu

et al. 2016

Bull Environ Contam Toxicol

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Two-stage in situ wetlands (two vertical flow constructed wetlands in parallel and a horizontal flow constructed wetland) were constructed for studying domestic wastewater purification and the correlations between contaminant removal and plant and soil enzyme activities. Results indicated the removal efficiency of NH4 (+) and NO3 (-) were significantly correlated with both urease and protease activity, and the removal of total phosphorus was significantly correlated with phosphatase activity. Chemical oxygen demand removal was not correlated with enzyme activity in constructed wetlands. Plant root enzyme (urease, phosphatase, protease and cellulose) activity correlation was apparent with all contaminant removal in the two vertical flow constructed wetlands. However, the correlation between the plant root enzyme activity and contaminant removal was poor in horizontal flow constructed wetlands. Results indicated that plant roots clearly played a role in the removal of contaminants.

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Section: Resultsmentioning

confidence: 99%

Correlation Among Soil Enzyme Activities, Root Enzyme Activities, and Contaminant Removal in Two-Stage In Situ Constructed Wetlands Purifying Domestic Wastewater

Chu

et al. 2016

Bull Environ Contam Toxicol

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“…Although these techniques effectively remove nitrate from contaminated water, they are very expensive to implement in pilot-scale programs, limiting their potential application. Of these technologies, the most versatile and widely used is biological denitrification [8] which uses an anoxic environment to completely remove nitrate; the chemically bound oxygen in nitrate acts as a terminal electron acceptor, liberating nitrogen (N 2 ) gas without generating brine as a by-product [9,10,11]. However, membrane filtration has been increasingly used to remove various contaminants from water [12][13][14][15][16].…”

Section: Figure 1 Nitrate Concentrations In Groundwater From 27 Watementioning

confidence: 99%

Nitrate Removal From Water Using Surface-Modified Ultrafiltration Membranes

Habuda-Stanić¹,

Nujić²,

Santo³

2014

e-GFOS

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Elevated nitrate concentrations in natural water sources are a worldwide concern due to the extensive levels of soil N-fertilization. This study investigates three commercially available polyethersulfone (PES) ultrafiltration (UF) membranes with different molecular weight cut-offs (5, 10, and 30 kDa), which we modified with a cationic surfactant, cetylpyridinium chloride to improve their nitrate removal. The nitrate removal efficiency of these membranes was examinated as functions of initial nitrate concentration, pH, and permeate flux. The best nitrate removal efficiency was obtained with a 5 kDa surface-modified UF membrane.Key words: nitrate removal, UF membrane, permeate flux, cetylpyridinium chloride, membrane surfacemodificaton UKLANJANJE NITRATA IZ VODE POVRŠINSKI MODIFICIRANIM ULTRAFILTRACIJSKIM MEMBRANAMASažetak: Pojava povećanih koncentracija nitrata u prirodnim vodama diljem svijeta najčešće je posljedica prekomjerne uporabe mineralnih gnojiva u poljoprivredi. U ovom radu ispitana je mogućnost primjene tri komercijalno dostupne površinski modificirane polietersulfonske (PES) ultrafiltracijske (UF) membrane s različitim graničnim molekulskim masama (5, 10 and 30 kDa). Površinska modifikacija UF membrana načinjena je primjenom surfaktanta cetilpiridin klorida. Učinkovitost uklanjanja nitrata ispitana je ovisno o početnoj koncentraciji nitrata, pH vrijednosti otopine i fluksu permeata. Najbolji učinak postignut je primjenom površinski modificirane membrane s graničnom molekularnom masom od 5 kDa.

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“…In recent decades, many research projects have been conducted for developing effective biological denitrification processes with some of them aimed at removing nitrate from contaminated groundwater [12][13][14][15]. However, the unresolved issues of poor retention of both the microbial biomass and the electron donor have delayed their full-scale applications.…”

Section: Introductionmentioning

confidence: 99%

Preliminary study of groundwater denitrification using a composite membrane bioreactor

Zhang

Cao

Fei

et al. 2011

Front. Environ. Sci. Eng. China

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A composite membrane bioreactor (CMBR) integrating the immobilized cell technique and the membrane separation technology was developed for groundwater denitrification. The CMBR had two well mixed compartments with one filled with the nitratecontaining influent and the other with a dilute ethanol solution; the compartments were separated by the composite membrane consisting of a microporous membrane facing the influent and an immobilized cell membrane facing the ethanol solution. Nitrate and ethanol molecules diffused from the respective compartments into the immobilized cell membrane where nitrate was reduced to gaseous nitrogen by the denitrifying bacteria present there with ethanol as the carbon source. The microporous membrane was attached to one side of the immobilized cell membrane for retention of the disaggregated bacteria. Relative to the single dose of external ethanol, the twodose supplementation produced better treatment results as evidenced by the lower concentrations of NO -3 -N and ethanol (as measured by total organic carbon) of the effluent. The batch treatment in CMBR removed most of the nitrate in the influent and attained a stable denitrification rate of 0.1 g$m -2 $h -1 for most of the 96-h cycles during the 30-cycle study. The effluent was essentially free of ethanol and nitrite nitrogen.

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Biological denitrification in drinking water using Glycyrrhiza glabra and Arunda donax as the carbon source

Cited by 91 publications

References 25 publications

Correlation Among Soil Enzyme Activities, Root Enzyme Activities, and Contaminant Removal in Two-Stage In Situ Constructed Wetlands Purifying Domestic Wastewater

Correlation Among Soil Enzyme Activities, Root Enzyme Activities, and Contaminant Removal in Two-Stage In Situ Constructed Wetlands Purifying Domestic Wastewater

Nitrate Removal From Water Using Surface-Modified Ultrafiltration Membranes

Preliminary study of groundwater denitrification using a composite membrane bioreactor

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