Behaviors of Intercellular Materials and Nutrients in Biological Nutrient Removal Process Supplied with Domestic Wastewater and Food Waste

2004 ◽  
Vol 76 (3) ◽  
pp. 272-279 ◽  
Author(s):  
So-Ryong Chae ◽  
Hyeong-Seok Jeong ◽  
Jae-Lim Lim ◽  
Seok-Tae Kang ◽  
Hang-Sik Shin ◽  
...  
Keyword(s):  
Food Waste ◽  
Nutrient Removal ◽  
Domestic Wastewater ◽  
Biological Nutrient Removal ◽  
Removal Process

Nutrient removal using anaerobically fermented leachate of food waste in the BNR process

2003 ◽  
Vol 47 (1) ◽  
pp. 159-165 ◽  
Author(s):  
C.Y. Lee ◽  
H.S. Shin ◽  
S.R. Chae ◽  
S.Y. Nam ◽  
B.C. Paik
Keyword(s):  
Food Waste ◽  
Nutrient Removal ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Molecular Size ◽  
Synthetic Wastewater ◽  
Biological Nutrient Removal ◽  
Operation Conditions ◽  
Removal Efficiencies ◽  
Molecular Size Distribution

Nutrients removal efficiencies highly depend on the presence of biodegradable organic carbon in the biological nutrient removal (BNR) process but most domestic wastewater in Korea has shown a low C/N ratio and has a small amount of biodegradable COD (chemical oxygen demand). On the other hand, about 11,577 tons of food waste that contains a lot of organic material has been produced in Korea per day. The feasibility and applicability of anaerobically fermented leachate of food waste (AFLFW) as an external carbon source was examined in the laboratory-scale BNR process at different operation conditions with synthetic wastewater and domestic sewage. As the addition of AFLFW increased, the average removal efficiencies of SCOD, T-N, T-P changed from 96%, 60%, and 2% to 90%, 77%, and 67%, respectively. From anoxic nitrate utilization tests, it was observed that once the readily biodegradable COD (especially VFAs) was depleted, the denitrification rate reduced from 8.2 mg NO3-N/g VSS/hr to 0.7 mg NO3-N/g VSS/hr. From the molecular size distribution test, it was concluded that about 60% of soluble COD in effluent, which was considered to originate from AFLFW, had a large molecular size (> 30kDa) that was not used by microorganisms.

Evaluation of influent prefermentation as a unit process upon biological nutrient removal

2003 ◽  
Vol 47 (11) ◽  
pp. 9-15 ◽  
Author(s):  
T. McCue ◽  
R. Shah ◽  
I. Vassiliev ◽  
Y.-H. Liu ◽  
F.G. Eremektar ◽  
...  
Keyword(s):  
Nutrient Removal ◽  
Domestic Wastewater ◽  
Pilot Scale ◽  
Biological Nutrient Removal ◽  
P Availability ◽  
Unit Process ◽  
Design Engineers ◽  
N Removal ◽  
Technical Basis ◽  
P Removal

The objective of this NSF sponsored research was to provide a controlled comparison of identical continuous flow biological nutrient removal (BNR) processes both with and without prefermentation in order to provide a stronger, more quantitative, technical basis for design engineers to determine the potential benefits of prefermentation to EBPR in treating domestic wastewater. Specifically, this paper focused upon the potential impacts of primary influent prefermentation upon BNR processes treating septic domestic wastewater. This study can be divided into two distinct phases - an initial bench-scale phase which treated septic P-limited (TCOD:TP>40) wastewater and a subsequent pilot-scale phase which treated septic COD-limited (TCOD:TP<40) wastewater. The following conclusions can be drawn from the results obtained to date.•Prefermentation increased both RBCOD, SBCOD and VFA content of septic domestic wastewater.•Prefermentation resulted in increased biological P removal for a highly septic, non-P limited (TCOD:TP<40:1) wastewater. However, in septic, P-limited (TCOD:TP>40:1) wastewater, changes in net P removal due to prefermentation were suppressed by limited P availability, even though P release and PHA content were affected.•Prefermentation increased specific anoxic denitrification rates for both COD and P-limited wastewaters, and in the pilot (COD-limited) study also coincided with greater system N removal.

scholarly journals New Biological Nutrient Removal Process Using Denitrifying Phosphate-Accumulating Organisms.

2002 ◽  
Vol 25 (12) ◽  
pp. 751-755 ◽  
Author(s):  
Satoshi TSUNEDA ◽  
Johwan AHN ◽  
Tomotaka DAIDOU ◽  
Takashi OHNO ◽  
Akira HIRATA
Keyword(s):  
Nutrient Removal ◽  
Biological Nutrient Removal ◽  
Removal Process
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