Batch biological denitrification using Arundo donax, Glycyrrhiza glabra, and Gracilaria verrucosa as carbon source

Övez, B.

doi:10.1016/j.procbio.2005.12.030

Cited by 74 publications

(31 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the past decades, considerable increase in nitrate concentration in groundwater has been observed in many countries, including China (Ovez 2006;Rocca et al 2007;Sierra-Alvarez et al 2007;Wang and Wang 2009). Concern over nitrate contamination is due to health problems related to methemoglobinemia in infants (blue baby syndrome) because nitrate converts to nitrite in the body and reacts with Fe(II) in hemoglobin to oxidize it to Fe(III), which limits the oxygen carrying capacity of blood.…”

Section: Introductionmentioning

confidence: 99%

Nitrate removal from groundwater using solid-phase denitrification process without inoculating with external microorganisms

Wang

2013

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Denitrification of groundwater was studied using a laboratory-scale reactor packed with biodegradable snack ware served as both carbon source and biofilm support for microorganisms. The complete removal of 50 mg/L of nitrate-nitrogen was achieved in a 23-day-old reactor with 2.1 h of hydraulic retention time without inoculating with any external microorganisms, which indicates that indigenous microorganisms in groundwater proliferate readily and result in stable biofilm formation onto biodegradable snack ware. Accumulation of nitrite and nitrate residue was detected when hydraulic retention time was lower than 2.1 h. The breakthrough of nitratenitrogen up to over 10 mg/L in the effluent water was observed with nitrate removal efficiency reducing to about 75 % when hydraulic retention time was lowered to 1.4 h. The highest rate of denitrification was observed with 1.5 h of hydraulic retention time. Dissolved organic carbon concentration in the effluent water ranged between 10 and 20 mg/L during the stable operation of the reactor, and nitrite-nitrogen concentration was never higher than 0.09 mg/L. Considering its relatively low price and high denitrification rate, biodegradable snack ware can become a good alternative for denitrification process.

show abstract

Section: Introductionmentioning

confidence: 99%

Nitrate removal from groundwater using solid-phase denitrification process without inoculating with external microorganisms

Wang

2013

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…In China, more than 50% of population uses groundwater as drinking water (Jin et al 2004). Recently, a considerable increase in nitrate concentration in groundwater has been observed in many countries including China (Ovez 2006;Rocca et al 2007;Sierra-Alvarez et al 2007;Wang and Wang 2009). Concern over nitrate contamination is due to health problems related to methemoglobinemia in infants (blue baby syndrome) and cancer of the alimentary canal and there is no other group of carcinogens that can produce such a wide variety of tumors by consuming nitrate-contaminated water (Vosoughifar et al 2005;Wang and Wang 2009).…”

Section: Introductionmentioning

confidence: 99%

Denitrification of nitrate-contaminated groundwater using biodegradable snack ware as carbon source under low-temperature condition

Wang

2011

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

A considerable increase in nitrate concentration in groundwater has been observed in many countries. This research focuses on nitrate removal using biodegradable snack ware (BSW) as both carbon source and biofilm support for denitrifiers. The denitrification efficiency of a laboratory-scale denitrification reactor packed with BSW was examined in a low-temperature condition. The nitrate removal efficiency supported by BSW decreased to approximately 40% at 12°C from nearly 100% at 25°C with 50 mg/L of nitrate-nitrogen in the influent and 2 h of hydraulic retention time (HRT). The complete nitrate removal was obtained when nitrate-nitrogen concentration was no more than 15 mg/L at 2 h of HRT and at 12°C. If the initial concentration of nitrate-nitrogen was 50 mg/L, 5 h of HRT was needed for the complete nitrate removal. Nitrite concentration in the treated water decreased evidently as HRT was increased from 2 to 5 h, or as nitratenitrogen concentration in the influent decreased to 15 mg/L from 50 mg/L. It was observed that varying HRT and nitrate concentration in the influent had no noticeable effect on dissolved organic carbon content in the effluent under the experimental conditions. This study indicated that the complete nitrate removal could be achieved readily even at 12°C using BSW as carbon source by changing HRT or the initial concentration of nitrate in the influent, which has some useful implications in environmental engineering practice.

show abstract

“…Biological denitrification has proved to be one of the most feasible, advanced, selective, and cost effective processes for removing nitrate by dissimilatory reduction (Song et al, 2005), which transforms it into nitrogen gas using biodegradable carbon compounds as the energy source (Ovez et al, 2006). Denitrification can be achieved either in suspended or attached growth systems.…”

Section: Introductionmentioning

confidence: 99%

Microbial Cellulose as Support Material for the Immobilization of Denitrifying Bacteria

Rezaee

Godini

Bakhtou

2008

Environ. Eng. Manag. J.

View full text Add to dashboard Cite

The purpose of this study was to investigate the immobilization of denitrifying bacteria on microbial cellulose (MC) for biological denitrification. A novel denitrifying bacterium, Pseudomonas stutzeri, was immobilized in microbial cellulose and introduced into an up flow packed bed reactor in order to remove nitrate from synthetic influent. The MC presented the high biomass concentration throughout the experiment, achieving 3.4 mg biomass/g support. The efficiency of the system for denitrification was tested under different running conditions. Complete biological denitrification of the synthetic effluent was achieved at low hydraulic residence times, less than 4 h, and high nitrate concentration (200 mg NO 3 -N/L). The immobilization of the bacterium in MC increased the adsorption capacity, decreased the cell leakage from the beads, resulted in higher activity of the immobilized cells, and allowed better operational control.

show abstract

Batch biological denitrification using Arundo donax, Glycyrrhiza glabra, and Gracilaria verrucosa as carbon source

Cited by 74 publications

References 24 publications

Nitrate removal from groundwater using solid-phase denitrification process without inoculating with external microorganisms

Nitrate removal from groundwater using solid-phase denitrification process without inoculating with external microorganisms

Denitrification of nitrate-contaminated groundwater using biodegradable snack ware as carbon source under low-temperature condition

Microbial Cellulose as Support Material for the Immobilization of Denitrifying Bacteria

Contact Info

Product

Resources

About