Effect of disk rotational speed on heavy metal accumulation by rotating biological contactor (RBC) biofilms

Costley, S; Wallis, F. M.

doi:10.1046/j.1472-765x.1999.00661.x

Cited by 9 publications

(3 citation statements)

References 12 publications

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“…The efficiency of various biosorption systems reported in the scientific literature for metal removal are highly variable and difficult to compare (Akhtar et al 2008;Bayramoglu et al 2006;Costley and Wallis 1999, 2001aDvorak et al 1992). As it was mentioned previously, the mechanism of metal biosorption is a complicated process and depends on a variety of factors including the ambient and environmental conditions such as pH and temperature; the initial concentration of metal ions and biomass; and competition of ions for biding sites (Das et al 2009a, b;Lottermoser et al 1999;Mathure and Patwardhan 2005).…”

Section: Discussionmentioning

confidence: 99%

“…High interfacial areas generated by the discs, simple and feasible design and operation, low land occupancy, low energy consumption, low cost of operation and maintenance, high reaction rate and treatment efficiency are the principal advantages of this type of reactor (Cortez et al 2008;Mathure and Patwardhan 2005). A number of studies reported the metal removal capacity of immobilised live microorganisms in a batch or continous systems using different type of reactors included rotary systems such as RBCs, with only one to three cations in solution (Akhtar et al 2008;Bayramoglu et al 2006;Travieso et al 2002;Costley and Wallis 1999, 2001aGyure et al 1987). A previous review (Malik 2004) stated that these biotreatment studies that demonstrated high efficiency for metal removal did not perform well in field trials.…”

Section: Introductionmentioning

confidence: 99%

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Biosorption of heavy metals in a photo-rotating biological contactor—a batch process study

Orandi

Lewis

2012

Appl Microbiol Biotechnol

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Metal removal potential of indigenous mining microorganisms from acid mine drainage (AMD) has been well recognised in situ at mine sites. However, their removal capacity requires to be investigated for AMD treatment. In the reported study, the capacity of an indigenous AMD microbial consortium dominated with Klebsormidium sp., immobilised in a photo-rotating biological contactor (PRBC), was investigated for removing various elements from a multi-ion synthetic AMD. The synthetic AMD was composed of major (Cu, Mn, Mg, Zn, Ca, Na, Ni) and trace elements (Fe, Al, Cr, Co, Se, Ag, Mo) at initial concentrations of 2 to 100 mg/L and 0.005 to 1 mg/L, respectively. The PRBC was operated for two 7-day batch periods under pH conditions of 3 and 5. The maximum removal was observed after 3 and 6 days at pH 3 and 5, respectively. Daily water analysis data demonstrated the ability of the algal-microbial biofilm to remove an overall average of 25-40 % of the major elements at pH 3 in the order of Na > Cu > Ca > Mg > Mn > Ni > Zn, whereas a higher removal (35-50 %) was observed at pH 5 in the order of Cu > Mn > Mg > Ca > Ni > Zn > Na. The removal efficiency of the system for trace elements varied extensively between 3 and 80 % at the both pH conditions. The batch data results demonstrated the ability for indigenous AMD algal-microbial biofilm for removing a variety of elements from AMD in a PRBC. The work presents the potential for further development and scale-up to use PBRC inoculated with AMD microorganisms at mine sites for first or secondary AMD treatment.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biosorption of heavy metals in a photo-rotating biological contactor—a batch process study

Orandi

Lewis

2012

Appl Microbiol Biotechnol

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“…112 The ability of modified Slovak zeolites to collect Cr III was measured by FAAS. 113 In the determination of Fe by FAAS 114 preconcentration by co-flotation with lead hexamethylenedithiocarbamate gave an LOD of 0.3 mg l 21 . A variety of electrode materials were able to preconcentrate Cd and Cu 115 to an extent comparable to that obtained with complexing agents (8-hydroxyquinoline, dithizone and rubeanic acid immobilized on filter paper).…”

Section: Preconcentrationmentioning

confidence: 99%

Atomic Spectrometry Update. Advances in atomic emission, absorption, and fluorescence spectrometry, and related techniques

Evans

Dawson²,

Fisher

et al. 2001

J. Anal. At. Spectrom.

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Biofilm establishment and heavy metal removal capacity of an indigenous mining algal-microbial consortium in a photo-rotating biological contactor

Orandi

Lewis

Moheimani

2012

Journal of Industrial Microbiology and Biotechnology

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An indigenous mining algal-microbial consortium was immobilised within a laboratory-scale photo-rotating biological contactor (PRBC) that was used to investigate the potential for heavy metal removal from acid mine drainage (AMD). The microbial consortium, dominated by Ulothrix sp., was collected from the AMD at the Sar Cheshmeh copper mine in Iran. This paper discusses the parameters required to establish an algal-microbial biofilm used for heavy metal removal, including nutrient requirements and rotational speed. The PRBC was tested using synthesised AMD with the multi-ion and acidic composition of wastewater (containing 18 elements, and with a pH of 3.5 ± 0.5), from which the microbial consortium was collected. The biofilm was successfully developed on the PRBC’s disc consortium over 60 days of batch-mode operation. The PRBC was then run continuously with a 24 h hydraulic residence time (HRT) over a ten-week period. Water analysis, performed on a weekly basis, demonstrated the ability of the algal-microbial biofilm to remove 20–50 % of the various metals in the order Cu > Ni > Mn > Zn > Sb > Se > Co > Al. These results clearly indicate the significant potential for indigenous AMD microorganisms to be exploited within a PRBC for AMD treatment.

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Effect of disk rotational speed on heavy metal accumulation by rotating biological contactor (RBC) biofilms

Cited by 9 publications

References 12 publications

Biosorption of heavy metals in a photo-rotating biological contactor—a batch process study

Biosorption of heavy metals in a photo-rotating biological contactor—a batch process study

Atomic Spectrometry Update. Advances in atomic emission, absorption, and fluorescence spectrometry, and related techniques

Biofilm establishment and heavy metal removal capacity of an indigenous mining algal-microbial consortium in a photo-rotating biological contactor

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