Aerobic digestion of starch wastewater in a fluidized bed bioreactor with low density biomass support

Rajasimman, M.; Karthikeyan, C.

doi:10.1016/j.jhazmat.2006.08.071

Cited by 61 publications

(26 citation statements)

References 13 publications

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“…Different reactor systems are used to treat textile effluent with different characteristics: like, submerged filtration using nano-membrane (Zheng et al 2013), Upflow anaerobic sludge bed reactor (UASB) coupled with adsorption process (Conceição et al 2013), fluidized bed reactor (Su et al 2011), microbial degradation (Agarry and Ajani 2011), combination of fixed and fluidized bed (Baban et al 2010), thermolysis , ultrafiltration (Dhodapkar et al 2007) and sequential anaerobic-aerobic treatments (Kapdan et al 2003)-to name a few. Different reaction criteria for COD removal have also been worked upon, like: ratio of volume of settled bed to bioreactor (Sokol 2003), use of catalyst system with thermolysis and coagulation treatment as well as solid content of influent (Rajasimman and Karthikeyan 2007). Biotreatment of textile wastewater required few potential indigenous microorganisms for biodegradation of COD (Agarry and Ajani 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The fluidized bed bioreactor is one of the most effective methods used in effluent treatment (Buffiére and Moletta 1999). Recently, industrial wastewaters have been treated by aerobic biological treatment in three-phase fluidized bed (Haribabu and Sivasubramanian 2014;Sabarunisha Begum and Radha 2014;Sokol 2012;Sokol and Woldeyes 2011;Rajasimman and Karthikeyan 2007;Ochieng et al 2003). Air stream is bubbled directly into the liquid, creating three phase in the aerobic treatment of wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…The role of solid media particles is to provide large surface area for microbes where they are retained from the growth. There is a formation of biofilm onto which microorganisms retain to digest organic waste (Rajasimman and Karthikeyan 2007;Sokol 2012). Moreover, three-phase inverse fluidized bed bioreactor (TPIFB) offers large specific support surface area, higher gas phase holdup and higher residence time in comparison to conventional fluidized bed.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

COD reduction of textile effluent in three-phase fluidized bed bioreactor using Pseudomonas aureofaciens and Escherichia coli

Sur

Mukhopadhyay

2017

3 Biotech

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This paper investigated the effect of mixed cultures of Pseudomonas aureofaciens and Escherichia coli and air as gas on degradation of chemical oxygen demand (COD) in three-phase inverse fluidized beds (TPIFBs) for textile effluents with initial COD of 1200 ppm (effluent 1) and 640 ppm (effluent 2). Investigators focused on the importance of different design of gas spargers of the TPIFB for checking its effect on COD reduction performance. For this purpose, four different gas spargers were fabricated for gas flow entry into bioreactor with different % open area: Gas sparger 1 (18% open area), sparger 2 (10.42% open area), sparger 3 (8.077% open area) and sparger 4 (1.53% open area). These percentage open area decided the amount of gas flow in a unit time in batch studies, which in turn rely mainly on superficial gas velocity. The reduction in COD was measured at two different superficial gas velocity (0.00343 and 0.004068 m/s) and at two ratio of static bed height to diameter (H/D) of 0.5 and 0.25 in an aerobic mode. Textile effluent 1 resulted in 98.07% COD reduction with sparger 3 and discharged at 23.14 ppm in 28 h. Textile effluent 2 resulted in 96.5% COD reduction with sparger 2 and discharged at 22.4 ppm in 22 h. The resulting COD values of Effluent 1 and effluent 2 were in range of discharge limit and resulted at a low gas velocity of 0.00343 m/s and low H/D ratio of 0.25. The gas holdup correlation was found to be e g = 0.0064 U g 0.98 .

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

COD reduction of textile effluent in three-phase fluidized bed bioreactor using Pseudomonas aureofaciens and Escherichia coli

Sur

Mukhopadhyay

2017

3 Biotech

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“…In optimum conditions, the COD removal of 67% was reported. Rajasimman and Karthikeyan (2007) used a fluidized bed bioreactor with low density particles to treat high organic concentration wastewater of starch industry. At the COD of 2250 mg L -1 and the hydraulic retention time of 24 h, the optimum COD removal of 93.8% was reported.…”

Section: Introductionmentioning

confidence: 99%

Assessing and simulation of membrane technology for modifying starchy wastewater treatment

et al. 2016

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In this study, a hydrophilic polyethersulfone membrane was used to modify the expensive and low efficient conventional treatment method of wheat starch production that would result in a cleaner starch production process. To achieve a cleaner production, the efficiency of starch production was enhanced and the organic loading rate of wastewater that was discharged into treatment system was decreased, simultaneously. To investigate the membrane performance, the dependency of rejection factor and permeate flux on operative parameters such as temperature, flow rate, concentration, and pH of feed were studied. Response surface methodology (RSM) has been applied to arrange the experimental layout which reduced the number of experiments and also the interactions between the parameters were considered. The maximum achieved rejection factor and permeate flux were 97.5% and 2.42 L min -1 m -2 , respectively. Furthermore, a fuzzy inference system was selected to model the nonlinear relations between input and output variable which cannot easily explained by physical models. The best agreement between the experimental and predicted data for permeate flux was denoted by correlation coefficient index (R 2 ) of 0.9752 and mean square error (MSE) of 0.0072 where defuzzification operator was center of rotation (centroid). Similarly, the maximum R 2 for rejection factor was 0.9711 where the defuzzification operator was mean of maxima (mom).

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“…A three-phase (gas-liquid-solid) FBBR has been successfully applied in aerobic biological treatment of industrial and municipal wastewaters [5][6][7][8]. The reactor outperforms other reactor configurations used in wastewater treatment such as the activated sludge system and packed-bed (or trickling-filter) reactor [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Inverse Fluidized Bed Biological Reactor for Treating High-Strength Industrial Wastewaters

Sokól̵¹,

Woldeyes²

2011

ACES

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The aim of this work was to investigate the aerobic degradation of high-strength industrial (refinery) wastewaters in the inverse fluidized bed biological reactor, in which polypropylene particles of density 910 kg/m 3 were fluidized by an upward flow of gas through a bed. Measurements of chemical oxygen demand (COD) versus residence time t were performed for various ratios of settled bed volume to reactor volume (V b /V R ) and air velocities u. The largest COD reduction, namely, from 54,840 to 2190 mg/l, i.e. a 96% COD decrease, was achieved when the reactor was operated at the ratio (V b /V R ) = 0.55, air velocity u = 0.046 m/s and t = 65 h. Thus, these values of (V b /V R ), u and t can be considered as the optimal operating parameters for a reactor when used in treatment of high-strength refinery wastewaters. In the treatment operation conducted in a reactor optimally controlled at (V b /V R ) = 0.55, u = 0.046 m/s and t = 65 h, the conversions obtained for all phenolic constituents of the wastewater were larger than 95%. The conversions of about 90% were attained for other hydrocarbons.

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Aerobic digestion of starch wastewater in a fluidized bed bioreactor with low density biomass support

Cited by 61 publications

References 13 publications

COD reduction of textile effluent in three-phase fluidized bed bioreactor using Pseudomonas aureofaciens and Escherichia coli

COD reduction of textile effluent in three-phase fluidized bed bioreactor using Pseudomonas aureofaciens and Escherichia coli

Assessing and simulation of membrane technology for modifying starchy wastewater treatment

Evaluation of the Inverse Fluidized Bed Biological Reactor for Treating High-Strength Industrial Wastewaters

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