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

Date

2002-02-01

Author

Mutlu, SH
Yetiş, Ülkü
Gurkan, T
Yılmaz, Levent

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

71
views

0
downloads

The aim of this study is to develop a membrane-based treatment scheme to remove colorants from the effluent of a baker's yeast plant. For this purpose microfiltration (MF), ultrafiltration (UF) and nanofiltraton (NF) membranes with differing molecular weight cut-offs (MWCOs) were tested. To evaluate the effectiveness of membrane processes in treating the waste stream, optical density (OD), COD, color measurements together with permeation fluxes were used. Effects of pretreatment methods (coagulation and coarse filtration) and feed composition on OD, color, COD were studied. In addition, gel filtration analysis was employed to characterize feed and permeate streams in terms of MW distribution of organics that are present. Maximum rejections obtained were 94%, 89% and 72% for OD, color and COD, respectively, when 0.8 pm microfiltration membrane and 400 Da NF membrane were used in series. It was also observed that addition of intermediate UF steps did not increase overall rejections and final permeate flux of NF membrane. Based on these observations, an efficient scheme was offered.

Subject Keywords

Ecological Modelling, Waste Management and Disposal, Pollution, Water Science and Technology

URI

https://hdl.handle.net/11511/47492

Journal

WATER RESEARCH

DOI

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

Collections

Department of Environmental Engineering, Article

Suggestions

OpenMETU
Core

Enzymatic extraction of activated sludge extracellular polymers and implications on bioflocculation Sesay, Ml; Özcengiz, Gülay; Sanin, Faika Dilek (Elsevier BV, 2006-04-01) This study examines enzyme hydrolysis, a mild, effective, but a rarely used method of extracellular polymer extraction, in removing polymers from mixed culture activated sludge flocs. Two carbohydrate specific enzymes (a-amylase and cellulase) and a protein specific enzyme (proteinase) are used during the study. First, the kinetic aspect is investigated, then enzyme dose optimization is carried out on laboratory grown activated sludge samples cultured at solids retention times (SRT) of 4 and 20 days. A more...
EFFECT OF CHROMIUM(VI) ON ACTIVATED-SLUDGE GOKCAY, CF; Yetiş, Ülkü (Elsevier BV, 1991-01-01) Hexavalent chromium, which is frequently encountered in the tannery effluents and in the electroplating wastes, is normally considered toxic to the activated sludge culture. Often a physico-chemical pretreatment prior to biological treatment is considered necessary. However, in this study it has been shown that an acclimatized activated sludge culture is fully capable of coping with the Cr(VI)-containing wastes and moreover the culture was significantly stimulated by up to 25 mg l-1 Cr(VI). None of the t...
Toxicity of 2,4-D acid to phytoplankton Okay, OS; Gaines, A (Elsevier BV, 1996-03-01) The toxic effects of 2,4-D on Phaedoactylum tricornutum (Bohlin) and Dunaliella tertiolecta (Butcher), two species of phytoplankton well suited to bioassay studies and responsive to pollutants, were studied by monitoring changes in growth in terms of cell populations, chlorophyll fluorescence and the rate of (CO2)-C-14 assimilation. Short term bioassays, batch and continuous cultures were studied. Pure 2,4-D acid appeared more toxic than the commercial amine form of the herbicide but this may have been due ...
EFFECT OF TEMPERATURE, PH AND DO CONCENTRATION ON FILTERABILITY AND COMPRESSIBILITY OF ACTIVATED-SLUDGE SURUCU, G; Sanin, Faika Dilek (Elsevier BV, 1989-11-01) This study investigates the effect of aeration basin temperature, pH and dissolved oxygen (DO) concentration on filterability and compressibility characteristics of activated sludge. Laboratory-scale semi-continuous reactors, fed with synthetic wastewater were used. Effects of temperatures of 15, 20, 25, 30, 35°C; pH values of 5.7, 7.2, 8.2, 9.0 and DO concentrations of 0.5, 1.0, 1.5, 2.0, 5.0 ml/l were studied by keeping all the other parameters constant in each case. Results indicated that as the operatin...
EFFECTS OF CU(II) ON A CHEMOSTAT CONTAINING ACTIVATED-SLUDGE Dilek, Filiz Bengü; Yetiş, Ülkü (Informa UK Limited, 1991-11-01) The purpose of this study was to evaluate the toxic effects of Cu(II) on a chemostat containing activated sludge. Different concentrations of Cu(II) (0.5, 1.0, 5.0, and 10.0 mgL-1) were maintained in a laboratory-scale completely mixed activated sludge unit, without recycle, treating simulated wastewater. The feed solution contained 650 mgL-1 protein (corresponding to 1300 mgL-1 COD) as a source of carbon. Experimental results indicated that the treatment efficiency was not adversely effected by the presenc...

Citation Formats

S. Mutlu, Ü. Yetiş, T. Gurkan, and L. Yılmaz, “Decolorization of wastewater of a baker’s yeast plant by membrane processes,” WATER RESEARCH, pp. 609–616, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47492.