Biological nutrient removal with an internal organic carbon source in piggery wastewater treatment

2000 ◽  
Vol 34 (3) ◽  
pp. 965-973 ◽  
Author(s):  
C Ra
Keyword(s):  
Wastewater Treatment ◽  
Carbon Source ◽  
Organic Carbon ◽  
Nutrient Removal ◽  
Biological Nutrient Removal ◽  
Piggery Wastewater ◽  
Organic Carbon Source

scholarly journals Alkalinity, and Not the Oxidation State of the Organic Substrate, Is the Key Factor in Domestic Wastewater Treatment by Mixed Cultures of Purple Phototrophic Bacteria

Resources ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 88
Author(s):  
Carol Nairn ◽  
Iván Rodríguez ◽  
Yolanda Segura ◽  
Raúl Molina ◽  
Natalia González-Benítez ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Carbon Source ◽  
Organic Carbon ◽  
Oxidation State ◽  
Rhodopseudomonas Palustris ◽  
Domestic Wastewater ◽  
Phototrophic Bacteria ◽  
Efficient Treatment ◽  
Domestic Wastewater Treatment ◽  
Organic Carbon Source

Domestic wastewater treatment by purple phototrophic bacteria (PPB) is based on the assimilative uptake of organics and nutrients into the bacterial biomass. Thereby, it strongly depends on the carbon/nutrients ratio of the wastewater. The physiological COD/N/P ratio for PPB growth in domestic wastewater makes the addition of an external organic carbon source necessary in order to allow for an efficient process. However, PPB need a source of alkalinity (as CO2) to grow on reduced organics that serves as an electron acceptor since biohydrogen production (an alternative electron sink) is inhibited by ammonium. A preliminary experiment showed that high nutrients-loading wastewater was limited by CO2 imbalance, leading to poor removal efficiencies. Subsequently, the effect of the oxidation state of the organics added as external organic carbon sources to PPB reactors treating low nutrients-loading domestic wastewater has been analyzed. Three organics were used as additives to PPB development in four consecutive batches: acetate (more oxidized), ethanol and butyrate (more reduced). The PPB population was settled and the general performance under the three situations, in terms of organics, N and P assimilation, and growth kinetics was not significantly different irrespective of the external organic carbon source. The reactors were dominated by PPB, though reduced organics allowed for dominance of Rhodopseudomonas palustris, whereas oxidized organics caused co-dominance of R. palustris and Rhodobacter capsulatus. Thereby, alkalinity (as bicarbonate), and not the oxidation state of the organics, is the key parameter for the efficient treatment of domestic wastewater by PPB.

Upgrading Wastewater Treatment Plants for Biological Nutrient Removal

1990 ◽  
Vol 22 (7-8) ◽  
pp. 53-60 ◽  
Author(s):  
B. Rabinowitz ◽  
T. D. Vassos ◽  
R. N. Dawson ◽  
W. K. Oldham
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
Design Flow ◽  
Biological Nutrient Removal ◽  
Nitrogen And Phosphorus ◽  
Conventional Activated Sludge ◽  
Recent Developments ◽  
Removal Technology ◽  
Biological Nitrogen

A brief review of recent developments in biological nitrogen and phosphorus removal technology is presented. Guidelines are outlined of how current understanding of these two removal mechanisms can be applied in the upgrading of existing wastewater treatment plants for biological nutrient removal. A case history dealing with the upgrading of the conventional activated sludge process located at Penticton, British Columbia, to a biological nutrient removal facility with a design flow of 18,200 m3/day (4.0 IMGD) is presented as a design example. Process components requiring major modification were the headworks, bioreactors and sludge handling facilities.

Experience with nutrient removal in a fixed-film system at full-scale wastewater treatment plants

1997 ◽  
Vol 36 (1) ◽  
pp. 129-137 ◽  
Author(s):  
Vibeke R. Borregaard
Keyword(s):  
Wastewater Treatment ◽  
Surface Area ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
High Specific Surface Area ◽  
Biological Nutrient Removal ◽  
Growth Processes ◽  
Total N ◽  
Attached Growth ◽  
On Line

In the upgrade of wastewater treatment plants to include biological nutrient removal the space available is often a limiting facor. It may be difficult to use conventional suspended growth processes (i.e. activated sludge) owing to the relatively large surface area required for these processes. Recent years have therefore seen a revived interest in treatment technologies using various types of attached growth processes. The “new” attached growth processes, like the Biostyr process, utilise various kinds of manufactured media, e.g. polystyrene granules, which offer a high specific surface area, and are therefore very compact. The Biostyr plants allow a combination of nitrification-denitrification and filtration in one and the same unit. The results obtained are 8 mg total N/l and an SS content normally below 10 mg/l. The plants in Denmark which have been extended with a Biostyr unit have various levels of PLC control and on-line instrumentation.

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
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