Biological groundwater treatment for chromium removal at low hexavalent chromium concentrations

Mamais, Daniel; Noutsopoulos, Constantinos; Kavallari, I; Nyktari, Eleni; Kaldis, A; Panousi, Eleni; Nikitopoulos, George; Antoniou, K.; Nasioka, Maria

doi:10.1016/j.chemosphere.2016.02.124

Cited by 65 publications

(27 citation statements)

References 23 publications

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“…In case of aerobic system oxygen was the competitive electron acceptor to Cr(VI) resulting reduction of O2 to oxide ion resulted lacking of Cr(VI) reduction. [166] Anaerobic and anoxic conditions were employed to determine the Cr(VI) reduction ability in two sequencing bioreactors (SBR) fed with groundwater of 3L (total volume of reactor=5 L). The design parameters were 0.…”

Section: Biocharmentioning

confidence: 99%

Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Pradhan

Sukla

Sawyer

et al. 2017

Journal of Industrial and Engineering Chemistry

359

125

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Hexavalent chromium (Cr(VI)) in water is a proven carcinogen to different internal and external organs of the living organisms. There are different human activities incorporated to the anthropogenic sources in the environment enriching Cr(VI) of high concentration in the water system above the regulatory level. The physical, chemical and biological properties of chromium favour the dissolution in the water environment. This concerns the environmental researcher to tackle and mitigate. Chemical or biological techniques or a combination of the two have been used to remove Cr(VI) from polluted waters. Biological techniques include integrated bioremediation, such as the primary processes of direct bioreduction and biosorption, and secondary processes of microbial fuel cell, biostimulation, surface modified dry biomass and biochar adsorption, and engineered biofilm and cell free reductase. These techniques are used by a wide range of living organisms including bacteria, fungi, plants, plant leaves, plant nuts and algae. This group of living organisms transform and remove Cr(VI) from water during the cellular metabolisms, extracellular activities, physical and chemical adsorptions on the cell surface, and photosynthesis. Variation of different physical, chemical and environmental parameters affecting the efficiency of the bioremediation process have impacted on the design of bioreactors. There has been a recent development of a microbial fuel cell which use the proximity of Cr(VI) reduction as a cathode half cell for the generation of renewable energy and simulation of its' removal from water.

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Section: Biocharmentioning

confidence: 99%

Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Pradhan

Sukla

Sawyer

et al. 2017

Journal of Industrial and Engineering Chemistry

359

125

View full text Add to dashboard Cite

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“…Despite the extensive literature on the biological reduction of Cr(VI) to Cr(III) (Dong et al, ; Lai et al, ), there is limited literature on biological Cr(VI) removal from groundwater sources using contact times typically practiced at a water treatment facility. Previous studies were conducted with high Cr(VI) concentrations (i.e., in mg/L) (Lai et al, ) or with a long contact time (Mamais et al, ; Panousi et al, ). Furthermore, previous studies failed to evaluate the resiliency of the treatment process or characterize the residuals of the treatment process.…”

Section: Introductionmentioning

confidence: 99%

Resilient biological hexavalent chromium removal with a two‐stage, fixed‐bed biotreatment system

Upadhyaya¹,

Dunagan²,

Mattingly

et al. 2019

AWWA Water Science

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Hexavalent chromium (Cr(VI)) can be biologically reduced to nontoxic and easily separable trivalent chromium (Cr(III)) without generating concentrated wastes.Using a 6-25 gpm pilot-scale two-stage, fixed-bed (FXB), biologically active carbon (BAC) treatment system, approximately 75 μg/L Cr(VI) was consistently removed to less than 7 μg/L with a 10-min empty-bed contact time. Potential Cr(VI)-reducing bacteria, including members from the Dechloromonas and Acinetobacter genera, were present in the system. The system was resilient, and 91% Cr removal was observed when the system was challenged with a 24-h phosphoric acid feed shutdown, a 3-day system shutdown, spiking Cr(VI) to 100 μg/L, or operating intermittently with regular shutdown periods of hours to days. The system recovered within 6 h after a 26-h acetic acid feed shutdown. Readily settling backwash wastewater was generated with characteristics similar to municipal wastewater. Overall, the results indicated that a two-stage, FXB BAC system can provide an effective and robust option for Cr(VI) removal. K E Y W O R D Sbackwash, backwash wastewater, biological, bioreactor, fixed-bed, hexavalent chromium, microbial community, robustness

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“…This is not only because of its high organic load, but also because of the large volume generated. Only a few studies have been published using cheese whey for Cr(VI) reduction [16,22,[27][28][29][30][31][32][33] and most of these were performed for in-situ groundwater and soil remediation [22,[30][31][32][33], while the remainder took place in pilot-scale suspended growth systems (activated sludge technology) [16,[27][28][29]. Another low-cost carbon source that was examined for Cr(VI) reduction was liquid pineapple waste by Zakaria et al [20].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Treatment of Agro-Industrial and Industrial Wastewaters: Case Studies of Cr(VI)/Second Cheese Whey and Cr(VI)/Winery Effluents

Tatoulis

Michailides

Tekerlekopoulou

et al. 2018

Water

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Hexavalent chromium (Cr(VI)) was co-treated either with second cheese whey (SCW) or winery effluents (WE) using pilot-scale biological trickling filters in series under different operating conditions. Two pilot-scale filters in series using plastic support media were used in each case. The first filter (i.e., Cr-SCW-filter or Cr-WE-filter) aimed at Cr(VI) reduction and the partial removal of dissolved chemical oxygen demand (d-COD) from SCW or WE and was inoculated with indigenous microorganisms originating from industrial sludge. The second filter in series (i.e., SCW-filter or WE-filter) aimed at further d-COD removal and was inoculated with indigenous microorganisms that were isolated from SCW or WE. Various Cr(VI) (5-100 mg L −1) and SCW or WE (d-COD, 1000-25,000 mg L −1) feed concentrations were tested. Based on the experimental results, the sequencing batch reactor operating mode with recirculation of 0.5 L min −1 proved very efficient since it led to complete Cr(VI) reduction in the first filter in series and achieved high Cr(VI) reduction rates (up to 36 and 43 mg L −1 d −1 , for SCW and WW, respectively). Percentage d-COD removal for SCW and WE in the first filter was rather low, ranging from 14 to 42.5% and from 4 to 29% in the Cr-SCW-filter and Cr-WE-filter, respectively. However, the addition of the second filter in series enhanced total d-COD removal to above 97% and 90.5% for SCW and WE, respectively. The above results indicate that agro-industrial wastewater could be used as a carbon source for Cr(VI) reduction, while the use of two trickling filters in series could effectively treat both industrial and agro-industrial wastewaters with very low installation and operational costs.

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Biological groundwater treatment for chromium removal at low hexavalent chromium concentrations

Cited by 65 publications

References 23 publications

Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Resilient biological hexavalent chromium removal with a two‐stage, fixed‐bed biotreatment system

Simultaneous Treatment of Agro-Industrial and Industrial Wastewaters: Case Studies of Cr(VI)/Second Cheese Whey and Cr(VI)/Winery Effluents

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