scholarly journals Effects of Sludge Retention Times on Nutrient Removal and Nitrous Oxide Emission in Biological Nutrient Removal Processes

2014 ◽  
Vol 11 (4) ◽  
pp. 3553-3569 ◽  
Author(s):  
Bo Li ◽  
Guangxue Wu
Keyword(s):  
Nitrous Oxide ◽  
Nutrient Removal ◽  
Nitrous Oxide Emission ◽  
Biological Nutrient Removal ◽  
Removal Processes

Comparison of phosphorus removal characteristics between various biological nutrient removal processes

1997 ◽  
Vol 36 (12) ◽  
pp. 61-68 ◽  
Author(s):  
Eun Lee Sang ◽  
Soo Kim Kwang ◽  
Hwan Ahn Jae ◽  
Whoe Kim Chang
Keyword(s):  
Adverse Effect ◽  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Phosphorus Release ◽  
Biological Nutrient Removal ◽  
Phosphorus Concentration ◽  
Bench Scale ◽  
Removal Processes

Bench scale experiments were carried out with four biological nutrient removal(BNR) units, A/O, A2/O, Phostrip and P/L units, to investigate the behavior of phosphorus in the system and to compare the characteristics of phosphorus removal in four experimental BNR units. The influent COD/T-P ratio was varied from 22 to 64 by changing COD concentration while maintaining phosphorus concentration constant. In general sidestream BNR units such as Phostrip and P/L units outperformed mainstream BNR units such as A/O and A2/O units in terms of phosphorus removal. While phosphorus release and uptake in A/O and A2/O units became less significant at low influent COD/T-P, the phosphorus release in A2/O unit was further influenced by nitrate in return sludge and thus A2/O unit required even higher influent COD/T-P ratio for luxury uptake of phosphorus. The luxury uptake of phosphorus in Phostrip and P/L units were not affected by influent COD/T-P ratio and the adverse effect of nitrate in return sludge on anaerobic phosphorus release in P/L process was not significant due to the sludge blanket in P-stripper.

Operating Experience with Biological Nutrient Removal at the Johannesburg Bushkoppie Works

1988 ◽  
Vol 20 (4-5) ◽  
pp. 51-62 ◽  
Author(s):  
A. R. Pitman ◽  
B. C. Trim ◽  
L. van Dalsen
Keyword(s):  
Nutrient Removal ◽  
Operating Experience ◽  
Biological Nutrient Removal ◽  
Successful Performance ◽  
Substrate Quality ◽  
Process Configuration ◽  
Removal Processes ◽  
Aeration Process ◽  
The City ◽  
Sludge Settleability

Various factors are important for the successful performance of biological nutrient removal processes. This paper reviews the performance of the new Bushkoppie Plant in Johannesburg in relation to other nutrient removal plants in the city and from these experiences, highlights important aspects to be considered in the design and operation of these plants. These are substrate quality, denitrification, sludge settleability, aeration, process configuration and sludge handling and disposal.

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