Correlation between Phosphorus removal technologies and Phosphorus speciation in sewage sludge: focus on iron-based P removal technologies.

A soy protein manufacturing facility was faced with the challenge of reducing its effluent phosphorus (P) content from 20–50 mg L−1 down to <2 mg L−1 total P without increasing soluble salt levels to comply with discharge and receiving water requirements. A number of biological and chemical P removal technologies previously evaluated either failed to achieve the new standards or would have produced prohibitive amounts of residual sludge and unacceptably high effluent salt concentrations. Lime precipitation, utilising a novel crystallisation technology, was demonstrated through on-site pilot testing to meet the process objectives. It is capable of achieving the required P removal at pH 10 while not increasing soluble salts and producing rapid settling and filterable particles. Also, minimal carbonate removal was observed with residual solids generation being only 40% of a complete lime softening reaction. This paper describes the technical evaluation that led to the full-scale treatment system that was put into operation in late 2005.

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Full Scale Investigations on Enhanced Biological Phosphorus Removal – P-Release in the Anaerobic Reactor

Water Science & Technology ◽

10.2166/wst.1994.0331 ◽

1994 ◽

Vol 29 (7) ◽

pp. 153-156 ◽

Cited By ~ 1

Author(s):

D. Wedi ◽

P. A. Wilderer

Keyword(s):

Phosphorus Removal ◽

Full Scale ◽

Process Conditions ◽

Enhanced Biological Phosphorus Removal ◽

Biological Phosphorus Removal ◽

Anaerobic Reactor ◽

P Release ◽

Acinetobacter Sp ◽

Biological Phosphorus ◽

P Removal

Most of the fundamental processes responsible for enhanced biological phosphorus removal (EBPR) were obtained through laboratory tests under defined conditions with pure or enriched cultures. Acinetobacter sp. was identified as the most important group of bacteria responsible for bio-P removal. Full scale data showed, however, that laboratory results do not match full scale results well enough. There is a lack of data on the effects of sub-optimal process conditions such as inadequate availability of volatile fatty acids (VFA), high nitrate recycle, storm water inflow or low temperatures. In this paper the results of full scale experiments on P-release are presented and compared with theoretical values. Measurements at a full scale Phoredox-system showed a surprisingly low P-release in the anaerobic reactor. Only 4 to 10% of the phosphorus in the activated sludge was released in the bulk liquid. With laboratory batch-tests, a maximum of 20% of the P in the sludge could be released. It is assumed that under the prevailing process conditions either the fraction of Acinetobacter sp. was very small, or bacteria other than Acinetobacter sp. were responsible for the P-removal, or most of the phosphorus was bound chemically but mediated by biological processes.

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A rapid method to quantify the biomass of viable Acidithiobacillus ferrooxidans in iron-based bioleaching matrix of sewage sludge

Biochemical Engineering Journal ◽

10.1016/j.bej.2019.107360 ◽

2019 ◽

Vol 152 ◽

pp. 107360

Author(s):

Decheng Jin ◽

Lanlan Liu ◽

Guanyu Zheng ◽

Jianru Liang ◽

Lixiang Zhou

Keyword(s):

Sewage Sludge ◽

Rapid Method ◽

Acidithiobacillus Ferrooxidans ◽

Iron Based

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Enhanced biological phosphorus removal process implemented in membrane bioreactors to improve phosphorous recovery and recycling

Water Science & Technology ◽

10.2166/wst.2003.0023 ◽

2003 ◽

Vol 48 (1) ◽

pp. 87-94 ◽

Cited By ~ 21

Author(s):

B. Lesjean ◽

R. Gnirss ◽

C. Adam ◽

M. Kraume ◽

F. Luck

Keyword(s):

Phosphorus Removal ◽

Theoretical Calculations ◽

Enhanced Biological Phosphorus Removal ◽

Biological Phosphorus Removal ◽

P Limitation ◽

Batch Tests ◽

P Content ◽

On Line ◽

Biological Phosphorus ◽

P Removal

The enhanced biological phosphorus removal (EBPR) process was adapted to membrane bioreactor (MBR) technology. One bench-scale plant (BSP, 200-250 L) and two pilot plants (PPs, 1,000-3,000 L each) were operated under several configurations, including pre-denitrification and post-denitrification without addition of carbon source, and two solid retention times (SRT) of 15 and 26 d. The trials showed that efficient Bio-P removal can be achieved with MBR systems, in both pre- and post-denitrification configurations. EBPR dynamics could be clearly demonstrated through batch-tests, on-line measurements, profile analyses, P-spiking trials, and mass balances. High P-removal performances were achieved even with high SRT of 26 d, as around 9 mgP/L could be reliably removed. After stabilisation, the sludge exhibited phosphorus contents of around 2.4%TS. When spiked with phosphorus (no P-limitation), P-content could increase up to 6%TS. The sludge is therefore well suited to agricultural reuse with important fertilising values. Theoretical calculations showed that increased sludge age should result in a greater P-content. This could not be clearly demonstrated by the trials. This effect should be all the more significant as the influent is low in suspended solids.

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Biochemical processes mediated by iron-based materials in water treatement: Enhancing nitrogen and phosphorus removal in low C/N ratio wastewater

The Science of The Total Environment ◽

10.1016/j.scitotenv.2021.145137 ◽

2021 ◽

Vol 775 ◽

pp. 145137

Author(s):

YuanYuan Peng ◽

Shengbing He ◽

Fei Wu

Keyword(s):

Phosphorus Removal ◽

Nitrogen And Phosphorus ◽

Nitrogen And Phosphorus Removal ◽

Biochemical Processes ◽

Iron Based

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A Parametric Model for Biological Excess Phosphorus Removal

Water Science & Technology ◽

10.2166/wst.1983.0112 ◽

1983 ◽

Vol 15 (3-4) ◽

pp. 127-152 ◽

Cited By ~ 23

Author(s):

I P Siebritz ◽

G A Ekama ◽

G v R Marais

Keyword(s):

Activated Sludge ◽

Phosphorus Removal ◽

Parametric Model ◽

Municipal Waste ◽

Anaerobic Reactor ◽

New Process ◽

Fractional Mass ◽

Activated Sludge Processes ◽

P Removal

Biological excess phosphorus removal in nitrification-denitrification single sludge activated sludge processes is shown to be stimulated by having a concentration of rapidly biodegradable COD (Sbsa) ≧25 mg/ℓ in the anaerobic reactor; the magnitude of the P removal is determined by a P removal propensity factor (Pf) defined by the product of (Sbsa−25) and the fractional mass of sludge in the anaerobic reactor. Sbsa is rapidly depleted by nitrate entering the anaerobic reactor; in the Phoredox process treating municipal waste flows if the TKN/COD ratio of the influent is greater than about 0,08 mgN/mgCOD the process, if designed to ensure efficient nitrification, is unlikely to remove all the nitrate and nitrate is recycled to the anaerobic reactor whereupon P removal declines. A new process is proposed that protects the anaerobic reactor from the nitrate in the effluent; tests indicate that this process can give excess P removal for TKN/COD ratios up to 0,14 mgN/mgCOD.

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EFFECT OF THE REDOX POTENTIAL ON SLUDGE LIQUOR PHOSPHATATION IN BIOLOGICAL PHOSPHORUS REMOVAL TECHNOLOGIES

Water and Ecology ◽

10.23968/2305-3488.2019.24.3.26-37 ◽

2019 ◽

Vol 24 (3) ◽

pp. 26-37

Author(s):

Valentina Aleksandrovna Iurchenko ◽

◽

Oleksandr Volodymyrovych Smyrnov ◽

Mykhailo Anatolyevich Yesin ◽

Yuliia Stanislavovna Levashova ◽

...

Keyword(s):

Redox Potential ◽

Phosphorus Removal ◽

Biological Phosphorus Removal ◽

Removal Technologies ◽

Biological Phosphorus

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Improvment of nitrogen and phosphorus removal in the anaerobic-oxic-anoxic-OXIC (AOAO) process by stepwise feeding

Water Science & Technology ◽

10.2166/wst.2000.0363 ◽

2000 ◽

Vol 42 (3-4) ◽

pp. 89-94 ◽

Cited By ~ 16

Author(s):

H.Y. Chang ◽

C.F. Ouyang

Keyword(s):

Carbon Source ◽

Phosphorus Removal ◽

Removal Rate ◽

Feeding Strategy ◽

Synthetic Wastewater ◽

Biological Nutrient Removal ◽

Nitrogen And Phosphorus ◽

Nitrogen And Phosphorus Removal ◽

Kjeldahl Nitrogen ◽

P Removal

This investigation incorporated a stepwise feeding strategy into the biological process containing anaerobic/oxide/anoxic/oxide (AOAO) stages to enhance nitrogen and phosphorus removal efficiencies. Synthetic wastewater was fed into the experimental reactors during the anaerobic and anoxic stages and the substrates/nutrients were successfully consumed without recycling either nitrified effluent or external carbon source. An intrinsic sufficient carbon source developed during the anoxic stage and caused the NOx (NO2-N+NO3-N) concentration to be reduced from 11.85mg/l to 5.65mg/l. The total Kjeldahl nitrogen (TKN) removal rate was between 81.81%∼93.96% and the PO4-P removal ratio ranged from 93%∼100%. The substrate fed into the anaerobic with a Q1 flow rate and a Q2 into the anoxic reactor. The three difference experiments contained within this study produced Q1/Q2 that varied from 7/3, 8/2, and 9/1. The AOAO process saved nearly one-third of the energy compared with typical biological nutrient removal (BNR) system A2O processes.

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