An Innovative Double-Layer Microsphere Used as Slow-Release Carbon Source for Biological Denitrification

As lack of organic carbon source is a key problem for biological denitrification, hemp fiber, PBS, PLA and PE were selected as raw materials, then four kinds of slow-release carbon source composite materials were prepared by 35A-double-screw extruder and used for biological denitrification. Their performan- ces were detected through static and continuous experiments. The results showed that in the static experiments, release carbon abilities of HB20 and HB40 were both not good, their CODMnwere 5.42 and 12.83mg/L respectively; In the continuous experiments, NO3-N removal rate of HLE decreased from 57.9% to 13.1% within 30 days. HBE could cause a continuous release of dissolved organic compound. In the operation of 66 days, above 96.0% NO3-N was removed and NO2-N level was below 0.02mg/L when influent NO3-N =30.0mg/L and HRT=24h. HBE was the most suitable carbon source carrier material for biological denitrification.

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Excess cell mass as an internal carbon source for biological denitrification

Bioresource Technology ◽

10.1016/j.biortech.2009.10.049 ◽

2010 ◽

Vol 101 (6) ◽

pp. 1787-1791 ◽

Cited By ~ 26

Author(s):

Prashant M. Biradar ◽

S.B. Roy ◽

S.F. D’Souza ◽

A.B. Pandit

Keyword(s):

Carbon Source ◽

Cell Mass ◽

Biological Denitrification

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Enhanced biological denitrification in the cyclic rotating bed reactor with catechol as carbon source

Bioresource Technology ◽

10.1016/j.biortech.2015.04.019 ◽

2015 ◽

Vol 189 ◽

pp. 266-272 ◽

Cited By ~ 24

Author(s):

Gholamreza Moussavi ◽

Seyed Javad Jafari ◽

Kamyar Yaghmaeian

Keyword(s):

Carbon Source ◽

Biological Denitrification

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Application of Bio-Carrier in a Ecological Floating Bed for Removal of Nitrogenous Pollutants: A Review

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.2064 ◽

2012 ◽

Vol 518-523 ◽

pp. 2064-2067 ◽

Cited By ~ 1

Author(s):

Yin Mei Wang

Keyword(s):

Carbon Source ◽

Ion Beam ◽

Beam Irradiation ◽

Ion Beam Irradiation ◽

Immobilized Bacteria ◽

Biological Denitrification

The article reviewed the advanced methods of ecological floating bed including usage of non-biodegradable bio-carrier, choosen of excellent plants, ion-beam irradiation, immobilized bacteria and aeration. Based on the review, the authors present the idea using biodegrable materials as bio-carrier, which not only could enhance the biomass in the ecological floating bed, but also could overcome the insufficience in carbon source for biological denitrification.

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Effect of thermal hydrolysis sludge supernatant as carbon source for biological denitrification with pilot-scale two-stage anoxic/oxic process and nitrogen balance model establishment

Biochemical Engineering Journal ◽

10.1016/j.bej.2018.08.013 ◽

2018 ◽

Vol 139 ◽

pp. 132-138 ◽

Cited By ~ 8

Author(s):

Yuqi Wu ◽

Kang Song ◽

Yinghe Jiang ◽

Xiaoyan Sun ◽

Lu Li

Keyword(s):

Carbon Source ◽

Nitrogen Balance ◽

Pilot Scale ◽

Balance Model ◽

Thermal Hydrolysis ◽

Two Stage ◽

Biological Denitrification

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The Selection of Natural Solid-phase Slow-release Organic Carbon-source Materials for the Denitrification Permeable Reactive Barriers (PRB)

Energy Procedia ◽

10.1016/j.egypro.2011.10.910 ◽

2011 ◽

Vol 11 ◽

pp. 4786-4793

Author(s):

Jing Liuxin ◽

Cheng Li ◽

Jiang Tingliang ◽

Li Di ◽

Feng Haigang ◽

...

Keyword(s):

Carbon Source ◽

Organic Carbon ◽

Slow Release ◽

Solid Phase ◽

Permeable Reactive Barriers ◽

Organic Carbon Source ◽

Reactive Barriers ◽

Source Materials ◽

Selection Of

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Denitrification with isopropanol as a carbon source in a biofilm system

Water Science & Technology ◽

10.2166/wst.1994.0547 ◽

1994 ◽

Vol 30 (11) ◽

pp. 69-78 ◽

Cited By ~ 7

Author(s):

Yongwoo Hwang ◽

Hiroshi Sakuma ◽

Toshihiro Tanaka

Keyword(s):

Carbon Source ◽

Nitrate Removal ◽

Growth Yield ◽

Pilot Scale ◽

Denitrification Rate ◽

Hydrogen Donor ◽

Microbial Oxidation ◽

Biological Denitrification ◽

Batch Tests

Several batch tests and pilot-scale investigations on biological denitrification with isopropanol were performed. Isopropanol was converted to acetone by microbial oxidation during denitrification. Isopropanol itself little contributed to denitrification in practice while the converted acetone played a role of a main hydrogen donor. A larger quantity of nitrite intermediate was formed by using methanol compared to the case of isopropanol. The measured requirement of isopropanol was 2.0 mg mg−1 NO3-N, and was 2/3 of methanol. The oxygen equivalent of isopropanol for nitrate removal was almost the same as that of methanol. The denitrifier net growth yield for isopropanol was greater than for methanol. In order to maximize the denitrification rate, it is essential to convert isopropanol to acetone rapidly by accurate dosing for nitrogen load because the denitrification rate was accelerated by using acetone only. Excessive dose of isopropanol can cause a decrease in the denitrification rate as well as an increase of BOD in the effluent.

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