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Simultaneous removal of C, N, P from cheese whey by jet loop membrane bioreactor (JLMBR)
Ist Teil von
Journal of hazardous materials, 2007-07, Vol.146 (1), p.399-407
Ort / Verlag
Amsterdam: Elsevier B.V
Erscheinungsjahr
2007
Quelle
MEDLINE
Beschreibungen/Notizen
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 (
Θ
c) 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. PO
4
3− removals were between 65 and 88% for the loading of 30–134
g
PO
4
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.