Fate of Selected Estrogens in two Laboratory Scale Sequencing Batch Reactors Fed with Different Organic Carbon Sources

This study investigated the effect of organic carbon source on ammonia oxidizing community in single sludge laboratory scale sequencing batch reactors (SBR). Two sequencing batch reactors performing simultaneous carbon oxidation and nitrification were operated. Operationally and functionally, these two reactors were identical, except that one reactor was fed peptone and sodium acetate, and the other was fed glucose and sodium acetate as external organic carbon sources. The peptone-fed reactor had 98.1±1.84% COD removal and 97.3±6.69% NH3-N oxidation. The glucose-fed reactor had 99.1±1.29% COD removal and 99.4±0.76% NH3-N oxidation. The reactor fed with peptone, a complex organic carbon source comprised of enzymatic digests of animal proteins, had greater diversity in both the heterotrophic bacterial community and the ammonia oxidizing bacteria community than in the reactor fed with glucose, a simple sugar as evidenced by automated ribosomal intergenic spacer analysis (ARISA) and terminal restriction fragment length polymorphism (TRFLP) experiments respectively.

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Assimilation of various organic carbon sources by Haematococcus strains

Acta Agronomica Hungarica ◽

10.1556/aagr.57.2009.2.14 ◽

2009 ◽

Vol 57 (2) ◽

pp. 231-237

Author(s):

M. Zych ◽

A. Stolarczyk ◽

K. Maca ◽

A. Banaś ◽

K. Termińska-Pabis ◽

...

Keyword(s):

Organic Carbon ◽

Organic Compounds ◽

Present Experiment ◽

Carbon Sources ◽

Growth Conditions ◽

Mixotrophic Growth ◽

Naturally Occurring ◽

Organic Carbon Sources ◽

Secondary Carotenoids ◽

Colour Changes

Differences in the assimilation of individual organic compounds (5 mM sugars and L-asparagine) under mixotrophic growth conditions were described for three naturally occurring Haematococcus strains.The effects of assimilation were measured by the growth intensity and size of algal cells, and the effect of colour changes in the cultures was observed. Some compounds caused the cell colouration to change from green to yellow, being the result of chlorophyll disappearance and the accumulation of yellow secondary carotenoids. In the present experiment none of the cultures turned red, thus excluding the intense accumulation of the commercially interesting carotenoid, astaxanthin.

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Effects of carbon sources on sludge performance and microbial community for 4-chlorophenol wastewater treatment in sequencing batch reactors

Bioresource Technology ◽

10.1016/j.biortech.2018.01.106 ◽

2018 ◽

Vol 255 ◽

pp. 22-28 ◽

Cited By ~ 41

Author(s):

Jianguo Zhao ◽

Yahe Li ◽

Xiurong Chen ◽

Yu Li

Keyword(s):

Wastewater Treatment ◽

Microbial Community ◽

Carbon Sources ◽

Batch Reactors ◽

Sequencing Batch Reactors

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Role of Organic Carbon Sources and Sulfate in Controlling Net Methylmercury Production in Riverbank Sediments of the South River, VA (USA)

Geomicrobiology Journal ◽

10.1080/01490451.2016.1247483 ◽

2017 ◽

Vol 35 (1) ◽

pp. 1-14 ◽

Cited By ~ 4

Author(s):

Krista M. A. Paulson ◽

Carol J. Ptacek ◽

David W. Blowes ◽

W. Douglas Gould ◽

Jing Ma ◽

...

Keyword(s):

Organic Carbon ◽

Carbon Sources ◽

The South ◽

Organic Carbon Sources ◽

Methylmercury Production

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Balancing yield, kinetics and cost for three external carbon sources used for suspended growth post-denitrification

Water Science & Technology ◽

10.2166/wst.2009.623 ◽

2009 ◽

Vol 60 (10) ◽

pp. 2485-2491 ◽

Cited By ~ 25

Author(s):

Y. Mokhayeri ◽

R. Riffat ◽

S. Murthy ◽

W. Bailey ◽

I. Takacs ◽

...

Keyword(s):

Wastewater Treatment Plants ◽

Carbon Sources ◽

The United States ◽

Batch Reactors ◽

Sequencing Batch Reactors ◽

Process Step ◽

Stringent Limit ◽

Receiving Waters ◽

Set Up

Facilities across North America are designing plants to meet stringent limit of technology (LOT) treatment for nitrogen removal. In the Mid-Atlantic region of the United States, this is in response to the Chesapeake Bay Agreement, which limit effluent total nitrogen discharges from wastewater treatment plants to between 3–5 mg/L. Since denitrification is crucial for the removal of nitrogen, maximizing this process step will result in a decrease in nutrient load to the receiving waters. Of particular interest is the use of an alternate external carbon source to replace the most commonly used carbon, methanol. Three external carbon sources were evaluated in this study including: methanol, ethanol and acetate at 13°C. The aim of this study was to evaluate the relative benefits and constraints for using these three carbon types. Laboratory scale Sequencing Batch Reactors (SBRs) were set up to grow and acclimate carbon free biomass to the specified substrate while in-situ Specific Denitrification Rates (SDNRs) were conducted concurrently. The results suggest that the SDNRs for acetate (31.0 ± 4.6 mgNO3-N/gVSS/hr) and ethanol (29.6 ± 5.6 mgNO3-N/gVSS/hr) are higher than that for methanol (10.1 ± 2.5 mgNO3-N/gVSS/hr). The yield coefficients in g COD/g COD were observed to follow a similar trend with values of 0.45 ± 0.05 for methanol, 0.53 ± 0.06 for ethanol and 0.66 ± 0.06 for acetate.

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