An experimental study on aerobic denitrification with polyvinyl alcohol as a carbon source in biofilms

1995 ◽  
Vol 32 (8) ◽  
pp. 235-242 ◽  
Author(s):  
D.-Y. Bang ◽  
Y. Watanabe ◽  
T. Noike
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Surface Layer ◽  
Carbon Source ◽  
Organic Carbon ◽  
Polyvinyl Alcohol ◽  
Dissolved Oxygen ◽  
Aerobic Denitrification ◽  
Dissolved Oxygen Concentration ◽  
Organic Carbon Source

Aerobic denitrification occuring in the biofilms attached to a partially submerged RBC, was investigated. Denitrification using polyvinyl alcohol (PVA) as a organic carbon source, was well proceeded by aerobic RBC systems at 25 °C. At an influent C/N ratio of around 1.2, the maximum net-denitrification efficiency was about 78% at a TOC loading of 2g/m2/d. In a chemostat experiment, aerobic denitrification was well proceeded under the dissolved oxygen concentration of 3 to 6 mg/L. The PVA-decomposing bacteria, nitrifiers, and denitrifiers co-existed in the biofilm, but the population of PVA-decomposing bacteria and denitrifiers in the surface layer was 1 to 2 orders of magnitude higher than those in the middle and bottom layers. It may indicate that the surface layer had a higher denitrifying activity. The nitrogen mass balance obtained using the experimental data clearly indicates a reasoning for aerobic denitrification.

Study on Biological Nitrogen Removal Performance of Aerobic Denitrification Treating Power Plant Wastewater

2013 ◽  
Vol 726-731 ◽  
pp. 2589-2593
Author(s):  
Tao Yang ◽  
Pei Ying Wu ◽  
Zhan Sheng Zhao ◽  
Hua Wei Xu ◽  
Gao Zhi Lv
Keyword(s):  
Power Plant ◽  
Carbon Source ◽  
Organic Carbon ◽  
Activated Sludge ◽  
Nitrogen Removal ◽  
Sodium Acetate ◽  
Aerobic Denitrification ◽  
Biological Nitrogen Removal ◽  
Organic Carbon Source ◽  
Biological Nitrogen

Enriched domestication in SBR was used to improve the proportion of aerobic denitrifiers in activated sludge, and actual power plant wastewater was treated, which proved the existence of aerobic denitrification. But at the later stage, because of carbon deficiency, aerobic denitrifiers were inhibited and NO3--N accumulated. Sodium acetate used as external organic carbon source was added when reaction carried on 3.5 hours to improve the COD/NH4+-N ratio from 6.5 to 10, effluent NO3--N concentration was 3.6 mg\L, average removal efficiency of TN was 90%, which could improve the aerobic denitrification performance of whole system effectively.

Thermal Ageing of Some Insulating Fluids in Contact with Insulation Paper and Copper

2018 ◽  
Vol 68 (12) ◽  
pp. 2881-2885
Author(s):  
Iosif Lingvay ◽  
Gabriela Oprina ◽  
Livia Carmen Ungureanu ◽  
Alexandra Pica ◽  
Valerica Stanoi
Keyword(s):  
Experimental Data ◽  
Dissolved Oxygen ◽  
Copper Foil ◽  
Atmospheric Oxygen ◽  
Thermal Ageing ◽  
Dissolved Oxygen Concentration ◽  
Mineral Oils ◽  
Synthetic Ester ◽  
Cu2o Film ◽  
Transformer Oils

The behaviour of copper and insulation paper in various electrical insulating fluids (transformer oils) exposed to thermal ageing at 110�30C for 1000 hours in closed vessels (without access to atmospheric oxygen) has been studied. The processing of the comparative experimental data revealed in all cases that the concentration of dissolved oxygen in the investigated oils decreases exponentially during the heat treatment. In the presence of the copper foil, the oxygen is almost depleted (the dissolved oxygen concentration is approaching zero), indicating a higher affinity of the copper to oxygen than the affinity to oxygen of the investigated oils. In the presence of the copper foil and / or of the insulation paper, the degradation processes of the mineral oils have a pronounced character, explained by the catalytic activity of the Cu2O film that has been formed and by the paper degradation, respectively. A high thermo-oxidative stability was noticed in the case of natural triglyceride oils, particularly for the synthetic ester-based oil.

Effects of an organic carbon source on the coupling of sulfur(thiosulfate)-driven denitration with Anammox process

2021 ◽  
pp. 125280
Author(s):  
Zihe Liu ◽  
Wenmin Lin ◽  
Qijin Luo ◽  
Yuancai Chen ◽  
Yongyou Hu
Keyword(s):  
Carbon Source ◽  
Organic Carbon ◽  
Organic Carbon Source ◽  
Anammox Process

Effect of different frequencies of the addition of Brachionus plicatilis on the performance of Litopenaeus vannamei in a nursery biofloc system with rice bran (anaerobic and aerobic) as an organic carbon source

Aquaculture ◽  
2021 ◽  
pp. 736669
Author(s):  
Rildo José Vasconcelos de Andrade Brazil ◽  
Elizabeth Pereira dos Santos ◽  
Gisely Karla de Almeida Costa ◽  
Clarissa Vilela Figueiredo Campos ◽  
Suzianny Maria Bezerra Cabral da Silva ◽  
...  
Keyword(s):  
Carbon Source ◽  
Organic Carbon ◽  
Rice Bran ◽  
Litopenaeus Vannamei ◽  
Brachionus Plicatilis ◽  
Organic Carbon Source

Changes in organic carbon source and storage with sea level rise-induced transgression in a Chesapeake Bay marsh

2021 ◽  
pp. 107550
Author(s):  
Rachel Van Allen ◽  
Kathryn M. Schreiner ◽  
Glenn Guntenspergen ◽  
Joseph Carlin
Keyword(s):  
Carbon Source ◽  
Organic Carbon ◽  
Sea Level Rise ◽  
Chesapeake Bay ◽  
Sea Level ◽  
Organic Carbon Source ◽  
And Storage

Mixotrophic and heterotrophic cultivation of microalgae using winery wastewater as organic carbon source

2021 ◽  
Author(s):  
Marco S. Lucas ◽  
Leonilde Marchão ◽  
Pedro B. Tavares ◽  
José Peres
Keyword(s):  
Carbon Source ◽  
Organic Carbon ◽  
Winery Wastewater ◽  
Heterotrophic Cultivation ◽  
Organic Carbon Source
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