Simultaneous removal of C, N, P from cheese whey by jet loop membrane bioreactor (JLMBR).
The membrane bioreactor (MBR) used in this study consisted of a jet loop bioreactor (aerobic high rate system) and a membrane separation unit (microfiltration). Jet loop membrane bioreactor (JLMBR) system is a high performance treatment system. High organic loading rates can be achieved with a very small footprint. The JLMBR is a compact biological treatment system which requires much smaller tank volumes than conventional activated sludge system. Solid-liquid separation is performed with a membrane. The JLMBR system, of 35 L capacity, was operated continuously for 3 months with a sludge age of 1.1-2.8 days and chemical oxygen demand (COD) loads of 3.5-33.5 kg COD m(-3) day(-1). The mean concentration values of COD, total nitrogen (TN) and PO(4)3- in cheese whey (CW) were found as 78,680 mg L(-1), 1125 mg L(-1) and 378 mg L(-1), respectively. Ninety-seven percent COD removal rate was obtained at the sludge age (Thetac) of 1.6 days and volumetric loads of 22.2 kg COD m(-3) day(-1). TN removal was obtained as 99% at the loading rates of 17-436 g TN m(-3) day(-1). PO4(3-) removals were between 65 and 88% for the loading of 30-134 gPO4(3-) m(-3) day(-1). The system could simultaneously remove the COD, TN and PO(4)3- at high efficiencies. The sludge flocks were highly motile, dispersed and had poor settling properties.
Farizoglu
Burhanettin
B
Environmental Engineering Department, Engineering & Architecture Faculty, Balikesir University, 10100 Balikesir, Turkey. bfarizoglu@balikesir.edu.tr
Keskinler
Bulent
B
Yildiz
Ergun
E
Nuhoglu
Alper
A
D019149:Bioreactors; D002244:Carbon / Q000378:metabolism; D002611:Cheese; D019649:Food Industry; D007220:Industrial Waste; D008894:Milk Proteins; D009584:Nitrogen / Q000378:metabolism; D010710:Phosphates / Q000378:metabolism; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D018508:Water Purification / Q000379:methods; D000067816:Whey Proteins
D007220:Industrial Waste; D008894:Milk Proteins; D010710:Phosphates; D014874:Water Pollutants, Chemical; D000067816:Whey Proteins; D002244:Carbon; D009584:Nitrogen