Effect of flow rate on heavy metal accumulation by rotating biological contactor (RBC) biofilms

Costley, S; Wallis, F. M.

doi:10.1038/sj.jim.2900812

Cited by 31 publications

(11 citation statements)

References 14 publications

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“…This trend is also verified with toxic and heavy metals substrates (Costley and Wallis 2000;Majumder and Gupta 2007;Sirianuntapiboon and Chuamkaew 2007).…”

Section: Hydraulic Retention Timesupporting

confidence: 50%

“…hydraulic retention time; SCOD: soluble chemical oxygen demand; SBOD 5 : 5-day soluble biochemical oxygen demand; TKN: total Kjeldahl nitrogen associated with the most efficient removal rates is required (Costley and Wallis 2000). A significant advantage offered by full-scale RBCs is to require short hydraulic retention periods (generally less than 1 h) (Benefield and Randall 1980).…”

Section: Hydraulic Retention Timementioning

confidence: 98%

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Rotating biological contactors: a review on main factors affecting performance

Cortez

Teixeira

Oliveira

et al. 2008

Rev Environ Sci Biotechnol

132

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Rotating biological contactors (RBCs) constitute a very unique and superior alternative for biodegradable matter and nitrogen removal on account of their feasibility, simplicity of design and operation, short start-up, low land area requirement, low energy consumption, low operating and maintenance cost and treatment efficiency. The present review of RBCs focus on parameters that affect performance like rotational speed, organic and hydraulic loading rates, retention time, biofilm support media, staging, temperature, influent wastewater characteristics, biofilm characteristics, dissolved oxygen levels, effluent and solids recirculation, stepfeeding and medium submergence. Some RBCs scale-up and design considerations, operational problems and comparison with other wastewater treatment systems are also reported.

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“…This trend is also verified with toxic and heavy metals substrates (Costley and Wallis 2000;Majumder and Gupta 2007;Sirianuntapiboon and Chuamkaew 2007).…”

Section: Hydraulic Retention Timesupporting

confidence: 50%

Section: Hydraulic Retention Timementioning

confidence: 98%

Rotating biological contactors: a review on main factors affecting performance

Cortez

Teixeira

Oliveira

et al. 2008

Rev Environ Sci Biotechnol

132

View full text Add to dashboard Cite

show abstract

“…The adapted nature of the indigenous AMD microorganisms to the high concentration of different metals, and the previously adsorbed metal ions, may have favoured multi-layered adsorption of metals which would account for the increased metal removal by the end of the reported study. A continuous progression of metal uptake occurs with multi-layered adsorption as binding sites begin to adsorb a second layer of ions (Costley and Wallis 2000).…”

Section: Discussionmentioning

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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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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“…It was stated [7] that RBC process was suitable for metal concentrations of up to 30 mg/L lead and 10 mg/L nickel and copper with minor reductions in treatment eYciency. The RBC system was reported [8] to operate successfully over an extended period of time with removal eYciencies of 34, 85 and 57% for Cd 2+ , Cu 2+ and Zn 2+ , respectively. The 3-stage RBC system to treat wastewater contaminated with Cd, Cu and Zn was reported to successfully remove the metals in the order Cu > Zn > Cd with removal capacities of 73, 42 and 33%, respectively [9].…”

Section: Introductionmentioning

confidence: 98%

Influence of nickel (II) and chromium (VI) on the laboratory scale rotating biological contactor

Taseli¹,

Gokcay

Gürol

2008

J Ind Microbiol Biotechnol

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High concentration of heavy metals is toxic for most microorganisms and cause strict damage in wastewater treatment operations and often a physico-chemical pretreatment prior to biological treatment is considered necessary. However, in this study it has been shown that biological systems can adapt to Ni (II) and Cr (VI) when their concentration is below 10 and 20 mg/L, respectively. The aim of this study was to evaluate the effect of Ni (II) and Cr (VI) on the lab-scale rotating biological contactor process. It was found that, addition of Ni (II) up to 10 mg/L did not reduce the chemical oxygen demand removal efficiency and on the contrary concentrations below 10 mg/L improved the performance. The influent Ni (II) concentration of 1 mg/L was the concentration where the treatment efficiency produced a maximum COD removal of 86.5%. Moreover, Ni (II) concentration above 10 mg/L was relatively toxic to the system and produced lower treatment efficiencies than the baseline study without Ni (II). Turbidity and suspended solids removals were not stimulated to a great extent with nickel. Addition of Ni (II) did not seem to affect the pH of the system during treatment. The dissolved oxygen concentration did not drop below 4 mg/L at all concentrations of Ni (II) indicating aerobic conditions prevailed in the system. Experiments conducted with Cr (VI) revealed that addition of Cr (VI) up to 20 mg/L did not reduce the COD removal efficiency and on the contrary concentrations below 20 mg/L improved the performance. The influent Cr (VI) concentration of 1 mg/L was the concentration where the treatment efficiency produced a maximum COD removal of 88%. Turbidity and SS removals were more efficient at 5 mg/L Cr (VI) concentration, rather than 1 mg/L, which lead to the conclusion that 5 mg/L Cr (VI) concentration is the optimum concentration, in terms of COD, turbidity and SS removals. Similar with Ni (II) experiments, addition of Cr (VI) did not significantly affect the pH value of the effluent. The DO concentration remained above 5 mg/L.

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Effect of flow rate on heavy metal accumulation by rotating biological contactor (RBC) biofilms

Cited by 31 publications

References 14 publications

Rotating biological contactors: a review on main factors affecting performance

Rotating biological contactors: a review on main factors affecting performance

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

Influence of nickel (II) and chromium (VI) on the laboratory scale rotating biological contactor

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