Recovery of protein from poultry processing wastewater using membrane ultrafiltration.
The feasibility of using ultrafiltration (UF) to recover protein from poultry processing wastewater (PPW) after primary treatment was investigated. By using polysulfone membrane with 30,000 molecular-weight-cut-off, almost all crude proteins in PPW were retained, subsequently reducing the chemical oxygen demand (COD) in the effluent to less than 200 mg L(-1). Similar to the processing of proteinaceous materials, the average fluxes reached only 100 Lm(-2) h(-1). By identifying the optimal values of key operation parameters, including pH, volumetric flow rate, and transmembrane pressure (6.74, 683 mL min(-1) and 14 psi, respectively) using response surface methodology (RSM), the flux was improved to higher than 200 Lm(-2) h(-1). Although severe membrane fouling was still inevitable after processing, flushing the membrane with a cleaning reagent was found capable of effectively restoring membrane performance.
Lo
Y Martin
YM
Department of Nutrition and Food Science, University of Maryland, 3102 Marie Mount Hall, College Park, MD 20742, USA. ymlo@umd.edu
Cao
Donghua
D
Argin-Soysal
Sanem
S
Wang
Jing
J
Hahm
Tae-Shik
TS
D000818:Animals; D005223:Fats; D005240:Feasibility Studies; D005525:Food-Processing Industry; D006863:Hydrogen-Ion Concentration; D008567:Membranes, Artificial; D008962:Models, Theoretical; D011200:Poultry; D011312:Pressure; D011506:Proteins / Q000302:isolation & purification*; D013997:Time Factors; D014462:Ultrafiltration / Q000295:instrumentation / Q000379:methods*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014877:Water Pollution, Chemical / Q000517:prevention & control
D005223:Fats; D008567:Membranes, Artificial; D011506:Proteins