Decolorization of wastewater of a baker's yeast plant by membrane processes

Mutlu, Sevcan; Yetış, Ülkü; Gürkan, Türker; Yılmaz, Levent

doi:10.1016/s0043-1354(01)00252-4

Cited by 64 publications

(33 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, large quantity of molasses wastewater, 13-15 L for every liter ethanol produced [1], is generated from these processes. There are basically two types of molasses wastewaters: the high strength process wastewater which originates from yeast separators and processes such as centrifuges and rotary vacuum filters, and the low and medium strength process wastewater which originates from floor washing and equipment cleaning [2]. Molasses wastewater is characterized by dark brown color and high organic loading.…”

Section: Introductionmentioning

confidence: 99%

Variables affecting melanoidins removal from molasses wastewater by coagulation/flocculation

Liang

Wang

Zhou

et al. 2009

Separation and Purification Technology

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Variables affecting melanoidins removal from molasses wastewater by coagulation/flocculation

Liang

Wang

Zhou

et al. 2009

Separation and Purification Technology

View full text Add to dashboard Cite

“…The other is low strength process wastewater or diluted wastewater that originates from the floor washing and equipment cleaning. It has low concentration of COD, BOD and color [31,34,37,48].…”

Section: Introductionmentioning

confidence: 99%

Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

Jiranuntipon

Chareonpornwattana

Damronglerd

et al. 2008

J Ind Microbiol Biotechnol

View full text Add to dashboard Cite

The presence of melanoidins in molasses wastewater leads to water pollution both due to its dark brown color and its COD contents. In this study, a bacterial consortium isolated from waterfall sediment was tested for its decolorization. The identification of culturable bacteria by 16S rDNA based approach showed that the consortium composed of Klebsiella oxytoca, Serratia mercescens, Citrobacter sp. and unknown bacterium. In the context of academic study, prevention on the difficulties of providing effluent as well as its variations in compositions, several synthetic media prepared with respect to color and COD contents based on analysis of molasses wastewater, i.e., Viandox sauce (13.5% v/v), caramel (30% w/v), beet molasses wastewater (41.5% v/v) and sugarcane molasses wastewater (20% v/v) were used for decolorization using consortium with color removal 9.5, 1.13, 8.02 and 17.5%, respectively, within 2 days. However, Viandox sauce was retained for further study. The effect of initial pH and Viandox concentration on decolorization and growth of bacterial consortium were further determined. The highest decolorization of 18.3% was achieved at pH 4 after 2 day of incubation. Experiments on fresh or used medium and used or fresh bacterial cells, led to conclusion that the limitation of decolorization was due to nutritional deficiency. The effect of aeration on decolorization was also carried out in 2 L laboratory-scale suspended cell bioreactor. The maximum decolorization was 19.3% with aeration at KLa = 2.5836 h -1 (0.1 vvm).

show abstract

“…Various pretreatment methods such as chemical coagulation [11][12][13][14][15], electrocoagulation [16,17], adsorption [18], and ozonation [19], before the membrane technology, had been used to remove NOM and to mitigate fouling [20]. Due to the low cost and easy use of chemical coagulation, it is commonly applied and researched.…”

Section: Introductionmentioning

confidence: 99%

Integrated Ultrafiltration Membranes and Chemical Coagulation for Treatment of Baker’s Yeast Wastewater

H¹,

Sadeghi²,

Rajaeieh³

et al. 2017

J Membr Sci Technol

View full text Add to dashboard Cite

An integrated system ultrafiltration membrane-coagulation has been employed for removal of chemical oxygen demand (COD) and turbidity from baker's yeast effluents. Fouling in the membrane is a common problem; chemical coagulation has been used as a pre-treatment method to mitigate fouling. Poly aluminum chloride (PACl), aluminum sulfate and lime had been used as coagulants. The results indicated that PACl exhibited higher removal efficiency than other coagulants. Two-stage coagulation and combination of coagulants were also investigated. The removal efficiency of COD and turbidity were achieved 68% and 81% by two-stage coagulation by PACl-lime, respectively. The effects of operating conditions on the ultrafiltration process for two types of hollow fiber membranes polyvinylidene fluoride (PVDF) and polypropylene (PP) on permeate flow rate, turbidity and COD removal of wastewater were further investigated. The results showed that by increasing the feed pressure, flow rate and feed temperature the permeate flow rate increased and the removal efficiency decreased. Under optimum conditions, PVDF membrane showed higher performance but compromised the flux compared to PP membrane.

show abstract

Decolorization of wastewater of a baker's yeast plant by membrane processes

Cited by 64 publications

References 18 publications

Variables affecting melanoidins removal from molasses wastewater by coagulation/flocculation

Variables affecting melanoidins removal from molasses wastewater by coagulation/flocculation

Decolorization of synthetic melanoidins-containing wastewater by a bacterial consortium

Integrated Ultrafiltration Membranes and Chemical Coagulation for Treatment of Baker’s Yeast Wastewater

Contact Info

Product

Resources

About