Biodegradation of 1,1,2,2-tetrachloroethane in Upflow Anaerobic Sludge Blanket (UASB) reactor

Basu, Debolina; Gupta, Sudhir Kumar

doi:10.1016/j.biortech.2009.06.074

Cited by 20 publications

(4 citation statements)

References 15 publications

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“…They also found that unacclimated anaerobic sludge will also perform the reduction. A bench-scale UASB reactor was used to study the biodegradation of a simulated wastewater containing 1,1,2,2-tetrachlorethane (TeCA) (Basu and Gupta, 2010). A control reactor was run simultaneously and all reactors were operated at varied HRTs and OLRs.…”

Section: Treatability Studiesmentioning

confidence: 99%

Anaerobic Processes

Evans¹

2011

wer

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The anaerobic processes literature review contains a comprehensive discussion of articles published in 2010 with emphasis on biological wastewater treatment processes that exploit an environment devoid of oxygen. Anaerobic systems, like the upflow anaerobic sludge blanket (UASB) reactor and the anaerobic filter (AF), represent the traditional emphasis of anaerobic processes literature review. Anaerobic hydrogen production and anaerobic ammonia oxidation (anammox) have been incorporated more recently into this chapter of the literature review. This year's anaerobic processes literature review is divided into the following sections: integrated approaches, modeling advances, process technology, hydrogen production, microbiology, anammox, treatability studies, and inhibition of the anaerobic process. Integrated Approaches The integrated approaches section incorporates research concerning pretreatment and post-treatment steps used to enhance the anaerobic processes. Research regarding co-digestion of agricultural, municipal, and other wastes is included in this section. Additionally, evaluation of coupled technologies is considered; e.g. anaerobic digestion (AD) incorporated into ethanol facilities to enhance overall conversion of cellulose to useful products. Pretreatment. High crystalline cellulose was pretreated with N-methyl-morpholine-N-oxide (NMMO) at 90-120°C for 0.5-15 h in three different types of NMMO solutions (Jeihanipour et al., 2010). Pretreatment with NMMO resulted in complete digestion of cellulose after 15 d with a corresponding biogas yield of 415 L/kg-cellulose.The use of alkaline, solid-state pretreatment of corn stover with sodium hydroxide (NaOH) concentrations of 1%, 2.5%, 5.0%, and 7.5% was investigated for improving lignin degradation and biogas production potential (Zhu, Wan, et al., 2010). Lignin degradation increased from 9.1% to 46.2% for NaOH concentrations from 1% to 7.5%, respectively, and biogas yield peaked at 372.4 L/kg-volatile solids (VS) for an NaOH concentration of 5%. A study was conducted to evaluate the effect of thermal pretreatment at 70-90°C on biogas production, solubilization of organic compounds, the release of inorganic species, and the effect

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Section: Treatability Studiesmentioning

confidence: 99%

Anaerobic Processes

Evans¹

2011

wer

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“…Equipment is commercially available and engineering design requirements are generally well defined for building biofilm reactors. Numerous laboratory scale studies have examined the anaerobic treatment of individual chlorinated ethenes and ethanes in upflow anaerobic sludge blanket (Basu and Asolekar 2012a, b, c;Hwu and Lu 2008;Sponza 2003, Basu andGupta 2010;Liu et al 2003;Prakash and Gupta 2000), aerobic soil slurry (Frascari et al 2010), anaerobic fixed-bed (Wild et al 1995), aerobic packed-bed (Frascari et al 2014), anaerobic packed bed (Mijaylova-Nacheva and Canui-Chuil 2006), aerobic fluidized-bed (Segar et al 1997) and aerobic suspended growth bioreactors (Frascari et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Performance of an anaerobic, static bed, fixed film bioreactor for chlorinated solvent treatment

2015

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Anaerobic, fixed film, bioreactors bioaugmented with a dechlorinating microbial consortium were evaluated as a potential technology for cost effective, sustainable, and reliable treatment of mixed chlorinated ethanes and ethenes in groundwater from a large groundwater recovery system. Bench- and pilot-scale testing at about 3 and 13,500 L, respectively, demonstrated that total chlorinated solvent removal to less than the permitted discharge limit of 100 μg/L. Various planned and unexpected upsets, interruptions, and changes demonstrated the robustness and reliability of the bioreactor system, which handled the operational variations with no observable change in performance. Key operating parameters included an adequately long hydraulic retention time for the surface area, a constant supply of electron donor, pH control with a buffer to minimize pH variance, an oxidation reduction potential of approximately -200 millivolts or lower, and a well-adapted biomass capable of degrading the full suite of chlorinated solvents in the groundwater. Results indicated that the current discharge criteria can be met using a bioreactor technology that is less complex and has less downtime than the sorption based technology currently being used to treat the groundwater.

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“…The use of efficient biological reactors such as the upflow anaerobic sludge blanket (UASB) for organic matter degradation has been widely assessed and checked, leading to high COD removal efficiencies operating with low hydraulic retention times (HRTs) (Puyol et al, 2009;Basu and Gupta, 2010). The UASB reactor involves the anaerobic degradation of organic wastes using a biomass which is not attached to a support medium but which aggregates under favourable conditions to produce particles with good settlement characteristics.…”

Section: Introductionmentioning

confidence: 99%

Start-up and performance of UASB reactors using zeolite for improvement of nitrate removal process

Montalvo

Guerrero

Robles

et al. 2014

Ecological Engineering

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A first study on the use of Chilean natural zeolite of different particle sizes (0.5, 1 and 2 mm in diameter) in laboratory-scale batch denitrificant reactors was carried out with the aim of assessing the microbial communities adhered to this material. Molecular techniques such as fluorescence in situ hybridization (FISH) and denaturing gradient gel electrophoresis (DGGE) fingerprints revealed a high microbial diversity with a strong presence of Gammaproteobacteria (70% of the total microorganisms) in reactors with zeolite 0.5 mm in diameter. Archaea were only detected in the reactors with zeolite 1 mm in diameter. In addition, the acclimatization and start-up of two UASB reactors 2 (one without zeolite and the other with added zeolite 1 mm in diameter) were conducted following three consecutive and progressive stages using upward velocities from 0.10 to

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Biodegradation of 1,1,2,2-tetrachloroethane in Upflow Anaerobic Sludge Blanket (UASB) reactor

Cited by 20 publications

References 15 publications

Anaerobic Processes

Anaerobic Processes

Performance of an anaerobic, static bed, fixed film bioreactor for chlorinated solvent treatment

Start-up and performance of UASB reactors using zeolite for improvement of nitrate removal process

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