Cyanide removal from cassava mill wastewater using Azotobactor vinelandii TISTR 1094 with mixed microorganisms in activated sludge treatment system

Kaewkannetra, Pakawadee; Imai, Tsuyoshi; García‐García, Francisco J.; Chiu, T.Y.

doi:10.1016/j.jhazmat.2009.06.162

Cited by 71 publications

(44 citation statements)

References 31 publications

(37 reference statements)

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“…Maximum power density of 1206.78 mW/m 2 and maximum current density of 8.6 mA/m 2 were observed after 14 days of MFC operation ( Figure 6). Our results are in accordance with Kaewkannetra et al [30], where a maximum power density of 1771 mW/m 2 was observed when cassava mill wastewater was used as substrate. It is clear from Figure 5 that electricity production occurs in three distinct phases, the ascending, stationary, and declining phase [30].…”

Section: Electricity Production By Employing Mfcsupporting

confidence: 93%

“…Our results are in accordance with Kaewkannetra et al [30], where a maximum power density of 1771 mW/m 2 was observed when cassava mill wastewater was used as substrate. It is clear from Figure 5 that electricity production occurs in three distinct phases, the ascending, stationary, and declining phase [30]. In the present study, the ascending phase was of 8 day incubation, stationary phase was 16 days, and declining phase was 4 days.…”

Section: Electricity Production By Employing Mfcsupporting

confidence: 93%

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Metabolism of Chicken Feathers and Concomitant Electricity Generation by Pseudomonas aeruginosa by Employing Microbial Fuel Cell (MFC)

Chaturvedi

Verma

2014

Journal of Waste Management

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Keratinolytic potential of Pseudomonas aeruginosa strain SDS3 has been evaluated for the metabolism of chicken feathers. Results indicated that strain SDS3 showed complete metabolism of 0.1 and 0.5% (w/v) chicken feathers in minimal medium. Feathers were metabolized up to 80% at 1% (w/v) concentration. Maximum soluble protein (480.8±17.1 g/mL) and keratinase (15.4±0.25 U/mL) were observed in the presence of 1% chicken feathers after five days of incubation. The effect of carbon and nitrogen sources showed that feather degradation was stimulated by complex carbon/nitrogen sources such as starch, malt extract, tryptone, and beef extract and was inhibited by simple carbon and nitrogen sources. Electricity production by employing chicken feathers as a substrate in microbial fuel cell (MFC) was evaluated. It was observed that maximum voltage corresponding to 141 mV was observed after 14 days of incubation. Maximum power density of 1206.78 mW/m 2 and maximum current density of 8.6 mA/m 2 were observed. The results clearly indicate that chicken feathers can be successfully employed as a cheap substrate for electricity production in MFC. This is the first report showing employment of chicken feathers as substrate in MFC.

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Section: Electricity Production By Employing Mfcsupporting

confidence: 93%

Section: Electricity Production By Employing Mfcsupporting

confidence: 93%

Metabolism of Chicken Feathers and Concomitant Electricity Generation by Pseudomonas aeruginosa by Employing Microbial Fuel Cell (MFC)

Chaturvedi

Verma

2014

Journal of Waste Management

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“…Dash et al [2] have recently reviewed and compared methods that have been investigated for the removal of cyanide from wastewater. Although biodegradation is usually the preferred technique for treating wastewater due to its cost-effectiveness and environmental friendliness, there is little information on the use of bioprocesses for treatment of cyanide-laden wastewater (e.g., [6][7][8]). Cyanide is toxic to microorganisms, particularly in high concentrations [1], which leads to a low biodegradation rate and restricts the potential of bioprocesses for efficiently removing cyanide and its compounds.…”

Section: Introductionmentioning

confidence: 99%

Removal of cyanide from wastewater by adsorption onto pistachio hull wastes: Parametric experiments, kinetics and equilibrium analysis

Moussavi

Khosravi

2010

Journal of Hazardous Materials

143

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“…These processes are associated with the discharge of large amounts of water, hydrocyanic acid, and organic matter. The cyanide content of cassava plants varies with the plant variety and soil conditions and may range between 75 and 1000 mg kg -1 of CN and large amounts of natural cyanogenic glycosides found in cassava are released during the production of starch from cassava tubers (11). These cyanogenic glycosides can be enzymatically hydrolysed into cyanide, which is often found in the waste water discharged from cassava processing industries.…”

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confidence: 99%

Degradation of soil cyanide by single and mixed cultures of Pseudomonas stutzeri and Bacillus subtilis

Nwokoro

Dibua

2014

Archives of Industrial Hygiene and Toxicology

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Summary The aim of this investigation was to study whether certain bacteria could be used for cyanide degradation in soil. The bacteria Pseudomonas stutzeri and Bacillus subtilis were selected based on their good growth in a minimal medium containing 0.8 mg mL-1 potassium cyanide (KCN). In this study we tested their ability to reduce cyanide levels in a medium containing 1.5 mg mL-1 of KCN. Although both microorganisms reduced cyanide levels, Pseudomonas stutzeri was the more effective test organism. Later on, the selected cultures were grown, diluted and their various cell concentrations were used individually and in combination to test their ability of cyanide degradation in soil samples collected around a cassava processing mill. Bacillus subtilis caused degradation of soil cyanide from 0.218 mg g-1 soil immediately with an inoculum concentration of 0.1 (OD600nm) to 0.072 mg g-1 soil after 10 days with an inoculum concentration of 0.6 (OD600nm) implying a 66.9 % reduction. Pseudomonas stutzeri cell concentration of 0.1 (OD600nm) decreased soil cyanide from 0.218 mg g-1 soil initially to 0.061 mg g-1 soil after 10 days with an inoculum concentration of 0.6 (OD600nm) (72 % reduction). The mixed culture of the two bacteria produced the best degradation of soil cyanide from 0.218 mg g-1 soil sample with a combined inoculum concentration of 0.1 (OD600nm) initially to 0.025 mg g-1 soil with a combined inoculum concentration of 0.6 (OD600nm) after 10 days incubation resulting in an 88.5 % degradation of soil cyanide. The analysed bacteria displayed high cyanide degradation potential and may be useful for efficient decontamination of cyanide contaminated sites.

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Cyanide removal from cassava mill wastewater using Azotobactor vinelandii TISTR 1094 with mixed microorganisms in activated sludge treatment system

Cited by 71 publications

References 31 publications

Metabolism of Chicken Feathers and Concomitant Electricity Generation by Pseudomonas aeruginosa by Employing Microbial Fuel Cell (MFC)

Metabolism of Chicken Feathers and Concomitant Electricity Generation by Pseudomonas aeruginosa by Employing Microbial Fuel Cell (MFC)

Removal of cyanide from wastewater by adsorption onto pistachio hull wastes: Parametric experiments, kinetics and equilibrium analysis

Degradation of soil cyanide by single and mixed cultures of Pseudomonas stutzeri and Bacillus subtilis

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