Population description of a denitrifying microbial system

Davies, T.R.; Toerien, D.F.

doi:10.1016/0043-1354(71)90111-4

Cited by 10 publications

(2 citation statements)

References 3 publications

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“…The purpose of the denitrifying process is to totally remove toxic inorganic nitrogen compounds from the system as nitrogen gas form. A typical denitrifying reaction by bacteria requires anaerobic condition and organic carbon sources as an electron donor such as carbohydrate, alcohol or organic acids (Meiklejohn, 1940;Rhodes et al, 1963;Davies and Toerien, 1971;Rhee and Fuks, 1978;Blaszczyk et al, 1980). We recently found that bacteria on rice straw have denitrifying capability under aerobic conditions and the rice straw itself can be used as carbon sources for the reaction.…”

Section: Introductionmentioning

confidence: 99%

Application of Nitrifying and Denitrifying Processes to Waste Management of Aquatic Life Support in Space.

et al. 1999

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Since a biological filter with nitrifying bacteria was firstly applied to aquatic animal experiments in IML-2 mission, the reactor system has been further studied to combine both nitrifying and denitrifying reactions under aerobic environment allowing an efficient removal of inorganic nitrogen from animal wastes. The isolated denitrifying bacteria had an activity under aerobic condition with rice straw providing a metabolic carbon source for the reaction. The advantage of the aerobic biological filter having both nitrifying and denitrifying activities may allow to reduce the size of the life support system and also for its manageability. The paper reports characteristics of the biological filter systems used for the IML-2 mission and the improved combined filter system having both nitrifying and denitrifying activities, and discuss its application to space experiments.

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Section: Introductionmentioning

confidence: 99%

Application of Nitrifying and Denitrifying Processes to Waste Management of Aquatic Life Support in Space.

et al. 1999

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“…1). 탈질 과정에서의 외부탄소원 사용은 박테리아 성장을 촉진 하여 효율적인 질소오염원 제거를 가능하도록 하며 2,3) 탈질 속도와 경제성을 고려하여 탄수화물, 알코올, 유기산 염, 아미 노산류 4) 의 메탄올, 에탄올, 아세테이트, 당밀 5) , 아세트산 6) 등 이 사용되어지고 있다. 최근에는 다양한 부산물과 폐기물을 재활용하여 보다 환경 친화적이거나 박테리아 적응성과 안전 적 측면을 고려하여 처리장 특성에 적합한 외부탄소원을 적용 하려는 연구사례가 제시되고 있다.…”

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Performance and Microbial Community analysis on denitrification of electronic wastewater using various External Carbon Source

Song,

Kim,

Cha

et al. 2024

J Korean Soc Environ Eng

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Objectives:In the biological denitrification process of electronic wastewater, the denitrification performance of various types of external carbon sources and the changes in the bacterial community before and after denitrification were evaluated through NGS analysis.Methods:After selecting 6 types of external carbon sources, the concentration of nitrate nitrogen was analyzed for 6 hours under anoxic conditions with a C/N ratio of 4 to evaluate the denitrification rate, and the changes in the community distribution of bacteria before and after denitrification were confirmed through NGS analysis.Results and Discussion:As a result of comparing the denitrification performance of various external carbon sources, Ethylene glycol(EG) was the best at 79.9% after 6 hours, and the specific denitrification rate(SDNR) was 1.000mg NO3--N removal/g MLVSS·hr. The bacterial community change using NGS was distributed more than 90% of 10 phylums at the phylum level, and Proteobacteria, Saccharibacteria, and Chloroflexi were dominant, and among them, Saccharibacteria< and Chloroflexi were confirmed to be bacteria contributing to denitrification. At class and genus level, when a external carbon source was added, the number of γ-proteobacteria increased in all experimental conditions, but the distribution of denitrifying bacteria was less than 1.27%, indicating that various bacteria contributed to denitrification. Conclusion:In the case of Ethylene glycol(EG), it is judged that it can be used as an external carbon source, and there was no significant change in the community depending on the type of carbon source injected, and various bacteria such as <Saccharibacteria and Chloroflexi contributed to denitrification and eliminated nitrogen pollutants.

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Biologische und biochemische Prozesse der Wasserbehandlung – Fortschrittsbericht

Hänel

Sandring

1974

Acta hydrochim. hydrobiol.

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Im Berichtszeitraum 1971… 73 war die Literatur zu den aeroben Verfahren der Abwasserreinigung (Abwasserbodenbehandlung, Belebtschlamm‐, Tropfkörper‐ und Abwasserteichverfahren), zur weitergehenden Abwasserreinigung und zur Feinreinigung des Wassers auszuwerten. Ausgehend von der Tatsache, daß diese Reinigungsverfahren dem Wesen nach bekannt und durch neue biologische Verfahren nicht in Frage gestellt sind, werden nur trendmäßige Weiterentwicklungen vorgelegt.

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Population description of a denitrifying microbial system

Cited by 10 publications

References 3 publications

Application of Nitrifying and Denitrifying Processes to Waste Management of Aquatic Life Support in Space.

Application of Nitrifying and Denitrifying Processes to Waste Management of Aquatic Life Support in Space.

Performance and Microbial Community analysis on denitrification of electronic wastewater using various External Carbon Source

Biologische und biochemische Prozesse der Wasserbehandlung – Fortschrittsbericht

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