Sequencing batch reactor biofilm system for treatment of milk industry wastewater

Sirianuntapiboon, Suntud; Jeeyachok, Narumon; Larplai, Rarintorn

doi:10.1016/j.jenvman.2005.01.018

Cited by 63 publications

(54 citation statements)

References 20 publications

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“…The selection of a biological treatment process is normally based on the quality of effluent needed to meet environmental protection agency standards, the characteristics and strength of the particular wastewater and operational costs. [1,2] Food processing industries such as milk processing produce considerable quantities of wastewaters, characterised by high concentration of chemical oxygen demand (COD), biochemical oxygen demand (BOD), and total Kjeldahl nitrogen up to 11 000, 5900 and 720 mg l −1 , respectively. [2] Consequently, these wastewaters are commonly treated biologically.…”

Section: Introductionmentioning

confidence: 99%

“…[1,2] Food processing industries such as milk processing produce considerable quantities of wastewaters, characterised by high concentration of chemical oxygen demand (COD), biochemical oxygen demand (BOD), and total Kjeldahl nitrogen up to 11 000, 5900 and 720 mg l −1 , respectively. [2] Consequently, these wastewaters are commonly treated biologically. [3,4] High-rate anaerobic systems seem to be cost effective and efficient in terms of sludge production and energy consumption, but the effluent quality does not comply with standards for discharge into natural water environments.…”

Section: Introductionmentioning

confidence: 99%

“…[1,4,7,8] An alternative approach using a sequencing batch reactor (SBR) process has exhibited an effective performance for organic carbon, nitrogen and phosphorus removal within a single reactor for domestic and industrial wastewaters. [1,2,9] Furthermore, the SBRs flexible operation allows mimicking of many processes in conventional continuous flow reactors and can yield superior performance. [10] SBRs have overcome many drawbacks and also differ from other suspended growth processes.…”

Section: Introductionmentioning

confidence: 99%

“…The clearest difference is the reactor volume variation with time, whereas it remains constant in the traditional continuous flow system. [11] Some studies [2,12] have reported an acceptable performance of SBRs in treating dairy industrial wastewater with varied concentration of COD and Total suspended solids (TSS). However, the SBR process still has some drawbacks such as the high excess sludge produced under high organic loading, high sludge volume index and lower removal efficiency due to the increase in biosludge.…”

Section: Introductionmentioning

confidence: 99%

“…[1,2] The applications of aerobic biofilm processes in food processing wastewater treatment have been developed to avoid the drawbacks in suspended growth processes. [1,2,7,13,14,19] In the attached growth process, microorganisms are attached on an inert support media. The reactor biomass concentration is high due to a longer sludge age.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Biological treatment of milk processing wastewater in a sequencing batch flexible fibre biofilm reactor

Abdulgader

Qian

Zinatizadeh

et al. 2009

Asia-Pacific J Chem Eng

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Biological treatment of dairy wastewater was investigated using a laboratory scale aerobic sequencing batch flexible fibre biofilm reactor (SBFFBR). The SBFFBR system was modified from a typical sequencing batch reactor system by using eight flexible fibre bundles with a very high specific surface area, which served as support for microorganisms. The reactor was operated under different influent chemical oxygen demand (COD) concentrations (610, 2041 and 4382 mg l −1 ) and constant hydraulic retention times of 1.6 days. The results have shown successful applicability of the SBFFBR system to treat this dairy wastewater. High COD removal efficiencies between 89.7 and 97% were achieved at average organic loading rates of 0.4 and 2.74 kg COD m −3 d −1 , respectively.  2009 Curtin

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Biological treatment of milk processing wastewater in a sequencing batch flexible fibre biofilm reactor

Abdulgader

Qian

Zinatizadeh

et al. 2009

Asia-Pacific J Chem Eng

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Sequencing batch reactor technology for biological wastewater treatment: a review

Singh

Srivastava

2010

Asia-Pacific J Chem Eng

142

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Wastewater treatment has been a challenge throughout the years due to varying influent characteristics and stringent effluent regulations. In response to this dilemma, a reliable, cost-effective and high-efficiency sequencing batch reactor (SBR) technology has been recently developed. SBRs are variations of the activated sludge process that operates on a fill-and-draw basis. It combines both aerobic-anaerobic phases in one unit and saves up to 25% of the aeration costs concomitant with low sludge production. Consequently, simultaneous nitrogen and phosphorus removal from the wastewater could be achieved by adjusting the actual operating cycle. This review paper discusses the technical description and operational flexibility of SBR for the treatment of wide range of effluent under different operational conditions, together with its modifications that could increase the effectiveness of SBR systems in the future.

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Matrices (re)loaded: Durability, viability, and fermentative capacity of yeast encapsulated in beads of different composition during long‐term fed‐batch culture

Gulli

Yunker

Rosenzweig

2019

Biotechnology Progress

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Encapsulated microbes have been used for decades to produce commodities ranging from methyl ketone to beer. Encapsulated cells undergo limited replication, which enables them to more efficiently convert substrate to product than planktonic cells and which contributes to their stress resistance. To determine how encapsulated yeast supports long-term, repeated fed-batch ethanologenic fermentation, and whether different matrices influence that process, fermentation and indicators of matrix durability and cell viability were monitored in high-dextrose, fed-batch culture over 7 weeks. At most timepoints, ethanol yield (g/g) in encapsulated cultures exceeded that in planktonic cultures. And frequently, ethanol yield differed among the four matrices tested: sodium alginate crosslinked with Ca 2+ and chitosan, sodium alginate crosslinked with Ca 2+ , Protanal alginate crosslinked with Ca 2+ and chitosan, Protanal alginate crosslinked with Ca 2+ , with the last of these consistently demonstrating the highest values. Young's modulus and viscosity were higher for matrices crosslinked with chitosan over the first week; thereafter values for both parameters declined and were indistinguishable among treatments. Encapsulated cells exhibited greater heat shock tolerance at 50 C than planktonic cells in either stationary or exponential phase, with similar thermotolerance observed across all four matrix types. Altogether, these data demonstrate the feasibility of re-using encapsulated yeast to convert dextrose to ethanol over at least 7 weeks. K E Y W O R D Salginate, chitosan, fermentation, immobilization, yeast encapsulation

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Sequencing batch reactor biofilm system for treatment of milk industry wastewater

Cited by 63 publications

References 20 publications

Biological treatment of milk processing wastewater in a sequencing batch flexible fibre biofilm reactor

Biological treatment of milk processing wastewater in a sequencing batch flexible fibre biofilm reactor

Sequencing batch reactor technology for biological wastewater treatment: a review

Matrices (re)loaded: Durability, viability, and fermentative capacity of yeast encapsulated in beads of different composition during long‐term fed‐batch culture

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