Agro-food wastewaters as external carbon source to enhance biological phosphorus removal

2011 ◽  
Vol 166 (2) ◽  
pp. 559-567 ◽  
Author(s):  
F.J. Fernández ◽  
M.C. Castro ◽  
J. Villasenor ◽  
L. Rodríguez
Keyword(s):  
Carbon Source ◽  
Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
External Carbon Source ◽  
Biological Phosphorus ◽  
Enhance Biological Phosphorus Removal

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).

Effects of injection of acetic acid and propionic acid for total phosphorus removal at high temperature in enhanced biological phosphorus removal process

2014 ◽  
Vol 69 (10) ◽  
pp. 2023-2028 ◽  
Author(s):  
C. Y. Ki ◽  
K. H. Kwon ◽  
S. W. Kim ◽  
K. S. Min ◽  
T. U. Lee ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbon Source ◽  
Removal Efficiency ◽  
Total Phosphorus ◽  
Phosphorus Removal ◽  
Treatment Plant ◽  
Biological Phosphorus Removal ◽  
External Carbon Source ◽  
Removal Process ◽  
Biological Phosphorus

In summer, wastewater treatment plant total phosphorus (TP) removal efficiency is low in South Korea. The reason is because of high temperatures or significant fluctuation of inflow characteristics caused by frequent rainfall. Hence, this study tried to raise TP removal efficiency by injecting fixed external carbon sources in real sewage. Polyphosphate accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs) compete to occupy microorganisms at high temperature. Propionate is known to restrain GAOs. Thus, acetate and propionate were chosen as the external carbon source in this study to find out the suitable volume and ratio of carbon source which ensured the dominance of PAOs. An external carbon source was supplied in the anaerobic reactor of the biological phosphorus removal process at high temperature (above 25 °C). TP removal efficiency was improved by injecting an external carbon source compared to that without an external carbon source. Also, it remained relatively stable when injecting an external carbon source, despite the variation in temperature. TP removal efficiency was the highest when injecting acetate and propionate in the proportion of 2:1 (total concentration as chemical oxygen demand (COD) is 12 mg/L in influent).

Enhancing biological phosphorus removal with glycerol

2010 ◽  
Vol 61 (7) ◽  
pp. 1837-1843 ◽  
Author(s):  
Q. Yuan ◽  
R. Sparling ◽  
P. Lagasse ◽  
Y. M. Lee ◽  
D. Taniguchi ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Carbon Source ◽  
Activated Sludge ◽  
Phosphorus Removal ◽  
Volatile Fatty Acids ◽  
Waste Activated Sludge ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
External Carbon Source ◽  
Biological Phosphorus

An enhanced biological phosphorus removal process (EBPR) was successfully operated in presence of acetate. When glycerol was substituted for acetate in the feed the EBPR process failed. Subsequently waste activated sludge (WAS) from the reactor was removed to an off-line fermenter. The same amount of glycerol was added to the WAS fermenter which led to significant volatile fatty acids (VFA) production. By supplying the system with the VFA-enriched supernatant of the fermentate, biological phosphorus removal was enhanced. It was concluded that, if glycerol was to be used as an external carbon source in EBPR, the effective approach was to ferment glycerol with waste activated sludge.

Morphology, In-Situ characterization with rRNA targetted probes and respiratory quinone profiles of enhanced biological phosphorus removal sludge

1998 ◽  
Vol 38 (8-9) ◽  
pp. 69-76 ◽  
Author(s):  
I. M. Sudiana ◽  
T. Mino ◽  
H. Satoh ◽  
T. Matsuo
Keyword(s):  
Carbon Source ◽  
Activated Sludge ◽  
Microbial Communities ◽  
Phosphorus Removal ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
In Situ Characterization ◽  
Respiratory Quinone ◽  
Biological Phosphorus

The microbial communities in activated sludge acclimated with either acetate or glucose as the major carbon source under phosphorus limited or rich conditions were investigated morphologically, phylogenetically and chemotaxonomically. The sludge with a minimized polyphosphate content was dominated by tetrad shaped bacteria, which were suspected to be ‘glycogen accumulating bacteria (GAOs) or G bacteria’ The sludge containing high polyphosphate was dominated by cluster forming coccus bacteria. Quinone analyses suggested that all the sludge tested contained various ubiquinones and menaquinones, of which the ubiquinones Q-8 and Q-10 were dominant. Analyses with rRNA targeted probes showed that beta sub class of Proteobacteria was most predominant in all sludges tested. Morphological, phylogenetic and chemotaxonomic investigation all indicated that both high and low P sludges are microbiologically diverse.

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