Treatment of anti-osmotic drug based pharmaceutical effluent in an upflow anaerobic fluidized bed system

Saravanane, R.; Murthy, D. V. S.; Krishnaiah, K.

doi:10.1016/s0956-053x(00)00109-4

Cited by 27 publications

(13 citation statements)

References 16 publications

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“…If reactors lack the desired biocatalysts, they need to be bioaugmented to obtain efficient degradation. By addition of exogenous optimally constructed bacteria (11,43) or functionally adapted bacterial consortia (18) and communities (47), enrichment of the total gene pool can be obtained. Likewise, a reactor can be augmented by in situ gene transfer (42).…”

mentioning

confidence: 99%

Natural Genetic Transformation in Monoculture Acinetobacter sp. Strain BD413 Biofilms

Hendrickx

Hausner

Wuertz

2003

Appl Environ Microbiol

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Horizontal gene transfer by natural genetic transformation in Acinetobacter sp. strain BD413 was investigated by using gfp carried by the autonomously replicating plasmid pGAR1 in a model monoculture biofilm. Biofilm age, DNA concentration, and biofilm mode of growth were evaluated to determine their effects on natural genetic transformation. The highest transfer frequencies were obtained in young and actively growing biofilms when high DNA concentrations were used and when the biofilm developed during continuous exposure to fresh medium without the presence of a significant amount of cells in the suspended fraction. Biofilms were highly amenable to natural transformation. They did not need to advance to an optimal growth phase which ensured the presence of optimally competent biofilm cells. An exposure time of only 15 min was adequate for transformation, and the addition of minute amounts of DNA (2.4 fg of pGAR1 per h) was enough to obtain detectable transfer frequencies. The transformability of biofilms lacking competent cells due to growth in the presence of cells in the bulk phase could be reestablished by starving the noncompetent biofilm prior to DNA exposure. Overall, the evidence suggests that biofilms offer no barrier against effective natural genetic transformation of Acinetobacter sp. strain BD413.

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mentioning

confidence: 99%

Natural Genetic Transformation in Monoculture Acinetobacter sp. Strain BD413 Biofilms

Hendrickx

Hausner

Wuertz

2003

Appl Environ Microbiol

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“…The efficiency of sulfate and COD removal was improved substantially with the use of adapted sludge. One hundred percent sulfate removal efficiency was obtained in half the time required with the non-adapted sludge [4,7,13,18,21]. Better nitrate removal efficiency was achieved in less time as a consequence of the increase in nitrate reduction velocity with adapted sludge [2].…”

Section: Resultsmentioning

confidence: 97%

“…There are a few reports on the anaerobic treatment of the pharmaceutical effluent [4,15]. The anaerobic degradation of different constituents of antibiotic and synthetic drug-based effluents were recently carried out, using methanogenic organisms, sulfatereducing organisms, nitrate-reducing organisms and iron-reducing organisms [21].…”

Section: Introductionmentioning

confidence: 99%

Comparative anaerobic treatment of wastewater from pharmaceutical, brewery, paper and amino acid producing industries

Rodrı́guez-Martı́nez

Martínez-Amador

Garza-Garcı́a

2005

J IND MICROBIOL BIOTECHNOL

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This study concerned the anaerobic treatment of five different industrial wastewaters with a diverse and complex chemical composition. The kinetics of biotransformation of this wastewater at different chemical oxygen demand (COD) were studied in a batch reactor. Wastewater from an amino acid producing industry (Fermex) and from a tank that received several types of wastewaters (collector) contained 0.83 g l(-1) and 0.085 g l(-1) sulfate, respectively. During the study period of 20 days, methane formation was observed in all types of wastewaters. Studies on COD biodegradation showed the reaction velocity was higher for Fermex wastewater and lower for collector wastewater, with values of 0.0022 h(-1) and 0.0011 h(-1), respectively. A lower methanogenic activity of 0.163 g CH4 day(-1) g(-1) volatile suspended solids (VSS) and 0.20 g CH4 day(-1) g(-1) VSS, respectively, was observed for paper producing and brewery wastewater. Adapted granular sludge showed the best biodegradation of COD during the 20-day period. The sulfate-reducing activity in pharmaceutical and collector wastewater was studied. A positive effect of sulfate-reducing activity on methanogenic activity was noted for both types of wastewaters, both of which contained sulfate ions. All reactions of methane generation for the tested industrial wastewaters were first-order. The results of this study suggest that the tested wastewaters are amenable to anaerobic treatment.

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“…Among the several types of reactors that have been developed the most popular anaerobic reactor configuration today in use is the hybrid up flow anaerobic sludge blanket (HUASB) reactor. Other anaerobic systems utilized for pharmaceutical wastewater treatment include up flow anaerobic filter [4,5], continuous stirred tank reactor [6], fixed-film fixed-bed reactor [7], up flow anaerobic sludge blanket reactor [8] and fluidized-bed reactor [9]. These biological treatment processes are ineffective in color removal and they require post-treatment methods.…”

Section: Introductionmentioning

confidence: 99%

Post treatment of antibiotic wastewater by adsorption on activated carbon

Mullai¹,

Rajesh²

2018

AIP Conference Proceedings

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Abstract.The most common method of treating industrial wastewater involves biomethanation in anaerobic digesters. This biological treatment process is ineffective in color removal and it requires post-treatment methods. The color is the first contaminant in wastewater which affects the water bodies in several ways. As the anaerobically digested antibiotic wastewater was found with color, an attempt was made to remove color using granulated activated carbon as an adsorbent. Experiments were carried out in batch reactors to find out the color removal efficiency of the wastewater at four different dosages such as 25, 50, 75 and 100 mg of adsorbent material at each of the four different initial concentrations of effluent like 1956, 1450, 1251 and 1040 mg COD/L. The steady state values of color removal efficiencies were 96.6, 97.64, 98.64 and 99.63%, respectively, using 100 mg of activated carbon under shaking condition at the end of the 120 th min. The effect of contact time on the percentage of color removal was also studied. It was observed that the adsorption of effluent obtained equilibrium at 120 minutes. The equilibrium data fitted well with the Langmuir and Freundlich isotherms.

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Treatment of anti-osmotic drug based pharmaceutical effluent in an upflow anaerobic fluidized bed system

Cited by 27 publications

References 16 publications

Natural Genetic Transformation in Monoculture Acinetobacter sp. Strain BD413 Biofilms

Natural Genetic Transformation in Monoculture Acinetobacter sp. Strain BD413 Biofilms

Comparative anaerobic treatment of wastewater from pharmaceutical, brewery, paper and amino acid producing industries

Post treatment of antibiotic wastewater by adsorption on activated carbon

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