Enhanced phosphorus biological removal from wastewater—effect of microorganism acclimatization with different ratios of short-chain fatty acids mixture

Chen, Yinguang; Liu, Yan; Zhou, Qi; Gu, Guowei

doi:10.1016/j.bej.2005.06.003

Cited by 42 publications

(11 citation statements)

References 34 publications

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“…The municipal wastewater treatment industry which is based on the exploitation of microorganisms in controlled and engineered systems depends on the metabolic activities of microorganisms which degrade the organic matter in wastewaters arriving to wastewater treatment plants containing selected and acclimatized populations of microorganisms (Eckenfelder 1989;Vargas et al 2000;Chen et al 2005).…”

Section: Merits and Demerits Of Bioremediationmentioning

confidence: 99%

A comprehensive overview of elements in bioremediation

Juwarkar

Singh

Mudhoo

2010

Rev Environ Sci Biotechnol

304

128

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Sustainable development requires the development and promotion of environmental management and a constant search for green technologies to treat a wide range of aquatic and terrestrial habitats contaminated by increasing anthropogenic activities. Bioremediation is an increasingly popular alternative to conventional methods for treating waste compounds and media with the possibility to degrade contaminants using natural microbial activity mediated by different consortia of microbial strains. Many studies about bioremediation have been reported and the scientific literature has revealed the progressive emergence of various bioremediation techniques. In this review, we discuss the various in situ and ex situ bioremediation techniques and elaborate on the anaerobic digestion technology, phytoremediation, hyperaccumulation, composting and biosorption for their effectiveness in the biotreatment, stabilization and eventually overall remediation of contaminated strata and environments. The review ends with a note on the recent advances genetic engineering and nanotechnology have had in improving bioremediation. Case studies have also been extensively revisited to support the discussions on biosorption of heavy metals, gene probes used in molecular diagnostics, bioremediation studies of contaminants in vadose soils, bioremediation of oil contaminated soils, bioremediation of contaminants from mining sites, air sparging, slurry phase bioremediation, phytoremediation studies for pollutants and heavy metal hyperaccumulators, and vermicomposting.

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Section: Merits and Demerits Of Bioremediationmentioning

confidence: 99%

A comprehensive overview of elements in bioremediation

Juwarkar

Singh

Mudhoo

2010

Rev Environ Sci Biotechnol

304

128

View full text Add to dashboard Cite

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“…The composition of SCFAs is an important factor for achieving higher removal efficiency during biological nutrient removal in WWTP and acetic and propionic acids have been considered as the better carbon sources [5,16,[23][24][25][26].…”

Section: Composition Of Scfasmentioning

confidence: 99%

Co-fermentation of waste activated sludge with food waste for short-chain fatty acids production: effect of pH at ambient temperature

Feng

Yan

Chen

2011

Front. Environ. Sci. Eng. China

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Effect of pH ranging from 4.0 to 11.0 on cofermentation of waste activated sludge (WAS) with food waste for short-chain fatty acids (SCFAs) production at ambient temperature was investigated in this study. Experimental results showed that the addition of food waste significantly improved the performance of WAS fermentation system, which resulted in the increases of SCFAs production and substrate reduction. The SCFAs production at pH 6.0, 7.0, 8.0, and 9.0 and fermentation time of 4 d was respectively 5022.7, 6540.5, 8236.6, and 7911.7 mg COD$L -1 , whereas in the blank tests (no pH adjustment, pH 8.0 (blank test 1), no food waste addition, pH 8.0 (blank test 2), and no WAS addition (blank test 3)) it was only 1006.9, 971.1, and 1468.5 mg COD$L -1 , respectively. The composition of SCFAs at pH from 6.0 to 9.0 was also different from other conditions and propionic acid was the most prevalent SCFA, which was followed by acetic and n-butyric acids, while acetic acid was the top product under other conditions. At pH 8.0 a higher volatile suspended solids (VSS) reduction of 16.6% for the mixture of WAS and food waste than the sole WAS indicated a synergistic effect existing in fermentation system with WAS and food waste. The influence of pH on the variations of nutrient content was also studied during anaerobic fermentation of the mixture of WAS and food waste at different pH conditions. The release of NH þ 4 -N increased with fermentation time at all pH values investigated except 4.0, 5.0 and in blank test one. The concentrations of soluble phosphorus at acidic pHs and in the blank test one were higher than those obtained at alkaline pHs. Ammonia and phosphorus need to be removed before the SCFAsenriched fermentation liquid from WAS and food waste was used as the carbon source.

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“…This transformation was using sodium acetate as an additional carbon source, in correspondence with a higher fraction of glycogen-accumulating organisms (GAOs) that dominated, and a lower glycogen transformation when phosphorus accumulating organisms (PAOs) played a dominant role with SBR-3, in which alkaline fermentation liquid contained a significant volume of propionic acid [32,33]. Moreover, the emission rate of N 2 O in SBR-2 was greater than in the other two SBRs (Fig.…”

Section: Comparison Of Denitrification Gas By-product (N 2 O) Across mentioning

confidence: 90%

Effect of the addition of organic carbon sources on nitrous oxide emission in anaerobic-aerobic (low dissolved oxygen) sequencing batch reactors

Chen

2010

Front. Environ. Sci. Eng. China

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The effect of additional organic carbon sources on the production of nitrous oxide (N 2 O) in anaerobicaerobic (low dissolved oxygen) real wastewater treatment system was investigated. In this paper, three laboratoryscale sequencing batch reactors (SBRs) (SBR-1, SBR-2 and SBR-3) were operating under an anaerobic-aerobic (low dissolved oxygen, 0.15-0.45 mg$L -1 ) configuration. The SBRs were 'long-term cultured' respectively with a single municipal wastewater sample, sodium acetate, and a waste-activated sludge alkaline fermentation liquid as the additional carbon sources of real wastewater. Off-gas analysis showed that N 2 O was emitted into the atmosphere during the aerobic (low dissolved oxygen) period in the three SBRs, and the order of N 2 O emission rate was SBR-2 > SBR-1 > SBR-3. It was observed that the higher poly-β-hydroxyvalerate fraction of polyhydroxyalkanoates, the lower glycogen transformation and less nitrite accumulation was in SBR-3, while the opposite behavior was observed in SBR-2. Further research indicated that the interaction of the factors above potentially affected the N 2 O emission in the anaerobic-aerobic (low dissolved oxygen) system.

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Enhanced phosphorus biological removal from wastewater—effect of microorganism acclimatization with different ratios of short-chain fatty acids mixture

Cited by 42 publications

References 34 publications

A comprehensive overview of elements in bioremediation

A comprehensive overview of elements in bioremediation

Co-fermentation of waste activated sludge with food waste for short-chain fatty acids production: effect of pH at ambient temperature

Effect of the addition of organic carbon sources on nitrous oxide emission in anaerobic-aerobic (low dissolved oxygen) sequencing batch reactors

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