scholarly journals Operation mode of a step-feed anoxic/oxic process with distribution of carbon source from anaerobic zone on nutrient removal and microbial properties

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yijun Shen ◽  
Dianhai Yang ◽  
Yang Wu ◽  
Hao Zhang ◽  
Xinxi Zhang
Keyword(s):  
Carbon Source ◽  
Nutrient Removal ◽  
Operation Mode ◽  
Microbial Properties ◽  
Anaerobic Zone

Study on Water Qualities Change along ECOSUNIDE Process

2011 ◽  
Vol 243-249 ◽  
pp. 4783-4787
Author(s):  
Yan Qiu Zhang ◽  
Ang Li ◽  
Yan Li
Keyword(s):  
Carbon Source ◽  
Total Nitrogen ◽  
Nutrient Removal ◽  
Operation Mode ◽  
Phosphorus Release ◽  
Ammonia Nitrogen ◽  
Total Phosphorous ◽  
Phosphorus Accumulation ◽  
Nutrient Removal Efficiency ◽  
Sludge Concentration

By distributing influent to different action zones, a high sludge concentration and high sludge concentration gradient were carried out in ECOSUNIDE treatment system. Carbon source was respectively supplied to anaerobic and anoxic tanks, meeting the demand of PAOs for phosphorus release and denirifiers for denitrification. The operation mode of muliple A/O (anoxic/oxic) was employed to avoid the inhibition of nitrate on nitrification and phosphorus accumulation, improving the nutrient removal efficiency without internal reflux. In the paper, the experiments were performed on ECOSUNIDE to investigate the change law of water qualities in the whole system by monitoring MLSS and every index including CODCr, ammonia nitrogen, total nitrogen and total phosphorous, etc. From the results, the removal rates of CODCr, ammonia nitrogen, total nitrogen and total phosphorous were 87.28%, 96.99%, 77.97% and 79.92% reseparately and there was a consistency of the removal rule for every kind of pollutant in the system.

FOG, not just for co-digestion: An evaluation of primary sludge and grease trap waste fermentation for a nutrient removal carbon source.

2014 ◽  
Vol 2014 (16) ◽  
pp. 799-807 ◽  
Author(s):  
Hunter Long ◽  
Ronald Latimer ◽  
Wendell Khunjar ◽  
Katya Bilyk ◽  
Charles Bott ◽  
...  
Keyword(s):  
Carbon Source ◽  
Nutrient Removal ◽  
Primary Sludge ◽  
Grease Trap Waste

Retrofitting conventional primary clarifiers to activated primary clarifiers to enhance nutrient removal and energy conservation in WWTPs in Beijing, China

2011 ◽  
Vol 63 (7) ◽  
pp. 1446-1452 ◽  
Author(s):  
Jia-wei Wang ◽  
Tian-zhu Zhang ◽  
Ji-ning Chen ◽  
Zhi-rong Hu
Keyword(s):  
Carbon Source ◽  
Energy Conservation ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
Test System ◽  
Biological Nutrient Removal ◽  
Aeration Tank ◽  
Secondary Effluent ◽  
Nitrogen And Phosphorus ◽  
Primary Sludge

Biological nutrient removal requires sufficient carbon source. Meanwhile, the removal of organic matter in wastewater requires energy consumption in the aeration tank. Carbon source for nutrient removal in most wastewater treatment plants with conventional primary clarifier (CPC) is generally insufficient in China. In order to increase carbon source and to save energy, a part of the CPC may be retrofitted as an activated primary clarifier (APC). In this paper, a pilot scale experiment was conducted to examine the performance of primary sludge fermentation and its effect on nitrogen and phosphorus removal. Results show that the primary sludge fermentation in APC has produced a similar VFA/TP ratio but a higher BOD5/TN ratio compared with those in the CPC effluent, and the TN concentrations in the secondary effluent are at 8.0, 10.8, and 17.4 mg/L, while TP is at 0.45, 1.10, and 2.28 mg/L when the pilot test system was fed with (1) the APC effluent, (2) 50% from the APC effluent and 50% from the CPC effluent, and (3) the CPC effluent, respectively. Results also indicate that the BOD5/TN ratio is a more sensitive factor than the VFA/TP ratio for nutrient removal and energy conservation for the APC fermentation.

An internal carbon source for improving biological nutrient removal

2009 ◽  
Vol 100 (1) ◽  
pp. 149-154 ◽  
Author(s):  
Pantelis Kampas ◽  
Simon A. Parsons ◽  
Pete Pearce ◽  
Sandrine Ledoux ◽  
Pete Vale ◽  
...  
Keyword(s):  
Carbon Source ◽  
Nutrient Removal ◽  
Biological Nutrient Removal

Mechanical Sludge Disintegration: Providing an Alternative Carbon Source for Nutrient Removal

2007 ◽  
Vol 28 (4) ◽  
pp. 471-477 ◽  
Author(s):  
P. Kampas ◽  
S.A. Parsons ◽  
P. Pearce ◽  
S. Ledoux ◽  
P. Vale ◽  
...  
Keyword(s):  
Carbon Source ◽  
Nutrient Removal ◽  
Alternative Carbon Source

Simultaneous removal of organic and strong nitrogen from sewage in a pilot-scale BNR process supplemented with food waste

2004 ◽  
Vol 49 (5-6) ◽  
pp. 257-264 ◽  
Author(s):  
S.R. Chae ◽  
S.H. Lee ◽  
J.O. Kim ◽  
B.C. Paik ◽  
Y.C. Song ◽  
...  
Keyword(s):  
Carbon Source ◽  
Food Waste ◽  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Pilot Scale ◽  
Biological Nutrient Removal ◽  
Biological Phosphorus Removal ◽  
External Carbon Source ◽  
N Removal ◽  
Biological Phosphorus

As the sewerage system is incomplete, sewage in Korea lacks easily biodegradable organics for nutrient removal. In this country, about 11,400 tons of food waste of high organic materials is produced daily. Therefore, the potential of food waste as an external carbon source was examined in a pilot-scale BNR (biological nutrient removal) process for a half year. It was found that as the supply of the external carbon increased, the average removal efficiencies of T-N (total nitrogen) and T-P (total phosphorus) increased from 53% and 55% to 97% and 93%, respectively. VFAs (volatile fatty acids) concentration of the external carbon source strongly affected denitrification efficiency and EBPR (enhanced biological phosphorus removal) activity. Biological phosphorus removal was increased to 93% when T-N removal efficiency increased from 78% to 97%. In this study, several kinds of PHAs (poly-hydroxyalkanoates) in cells were observed. The observed PHAs was composed of 37% 3HB (poly-3- hydroxybutyrate), 47% 3HV (poly-3-hydroxyvalerate), 9% 3HH (poly-3-hydroxyhexanoate), 5% 3HO (poly-3-hydroxyoctanoate), and 2% 3HD (poly-3-hydroxydecanoate).

The Use of a Biosolids Product as a Carbon Source for Biological Nutrient Removal

2015 ◽  
Vol 2015 (16) ◽  
pp. 702-710
Author(s):  
Jeanette Brown ◽  
Robert Sharp ◽  
Gregory Pace ◽  
Riasat Quadir ◽  
Liliana Duque ◽  
...  
Keyword(s):  
Carbon Source ◽  
Nutrient Removal ◽  
Biological Nutrient Removal
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