title: The influence of zeolite (clinoptilolite) on the performance of a hybrid membrane bioreactor.
abstract: This work aims to investigate the effect of clinoptilolite on the performance of membrane bioreactor (MBR). The control membrane bioreactor without clinoptilolite (CMBR) and the hybrid membrane bioreactor with clinoptilolite (HMBR), in two parallel simultaneous MBRs within long and short term filtration experiments, were studied. Sludge properties, transmembrane pressure (TMP) rise as an index for membrane fouling and nutrient removal from synthetic wastewater in the CMBR and HMBR were compared. In HMBR, sludge properties improvement such as 22.5% rise in MLSS, 7% more accumulation of large particles, reduction of soluble microbial products (SMP) to half of this value in CMBR, no increase in sludge volume index (SVI) and 66% TMP reduced. The results of short term filtration showed that the trend of TMP increase in terms of flux will be slower in HMBR. Improvement of biological wastewater treatment quality and ease of membrane operation are concluded from this study.
authors.affiliation: School of Chemical Engineering, College of Engineering, University of Tehran, Iran. Electronic address: m_rezai@alumni.ut.ac.ir.
authors.forename: M
authors.initials: M
authors.lastname: Rezaei
authors.affiliation: School of Chemical Engineering, College of Engineering, University of Tehran, Iran. Electronic address: mmehrnia@ut.ac.ir.
authors.forename: M R
authors.initials: MR
authors.lastname: Mehrnia
mesh_terms: D019149:Bioreactors; D003470:Culture Media; D008567:Membranes, Artificial; D010316:Particle Size; D012722:Sewage; D017641:Zeolites / Q000737:chemistry*
chemical_list: D003470:Culture Media; D008567:Membranes, Artificial; D012722:Sewage; C083175:clinoptilolite; D017641:Zeolites
keywords: Clinoptilolite; MBR; Short-term filtration; Sludge property; Zeolite