Investigation of sludge viscosity and its effects on the performance of a vacuum rotation membrane bioreactor

Date

2014-03-04

Author

KOMESLİ, Okan Tarık
Gökçay, Celal Ferdi

Metadata

Show full item record

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

Item Usage Stats

191
views

0
downloads

Sludge characteristics of a full-scale vacuum rotation membrane (VRM) bioreactor having plate-type membranes with 0.038 m nominal pore size and 540 m(2) surface area were investigated. The VRM plant is composed of an aeration tank and a filtration chamber. The sludge floc size distribution, as determined microscopically, was mainly between 0 and 100 m in the filter chamber with very little difference in size distribution between summer (20-25 degrees C) and winter (10-15 degrees C) seasons. Small floc size encountered in the filtration chamber was evident due to excessive shear administered by the rotation action and vigorous agitation by the scouring air. The mixed liquor suspended solids (MLSS) was variable between 5.23 and 14.10 g/L in the VRM tank and sludge behaved plastic. Viscosity ranged between 2.39 and 30 cP in the VRM tank in relation with MLSS concentration and temperature. Above 20 cP inter-plate spaces rapidly clogged leading to major clean-up.

Subject Keywords

Waste Management and Disposal, Water Science and Technology, Environmental Chemistry, General Medicine

URI

https://hdl.handle.net/11511/50748

Journal

ENVIRONMENTAL TECHNOLOGY

DOI

https://doi.org/10.1080/09593330.2013.840655

Collections

Department of Environmental Engineering, Article

Suggestions

OpenMETU
Core

Comparison of methods for estimating carbonaceous BOD parameters Uludag-Demirer, S; Demirer, Göksel Niyazi; Bowers, AR (Informa UK Limited, 2001-08-01) The performance of seven different methods (Differential, Fujimoto, Thomas, Graphical, Integral, Log-Difference, and Nonlinear Regression) for estimating first-stage, carbonaceous biochemical oxygen demand (CBOD), curve parameters, namely k and L-0 were compared using synthetic data generated by Monte Carlo simulation technique. The comparison of the methods was made based on their efficiency in retrieving the original values of k and L-0 which were selected to generate the synthetic data. In the first part...
Pollution characteristics, mechanism of toxicity and health effects of the ultrafine particles in the indoor environment: Current status and future perspectives Ali, Muhammad Ubaid; Lin, Siyi; Yousaf, Balal; Abbas, Qumber; Munir, Mehr Ahmed Mujtaba; Rashid, Audil; Zheng, Chunmiao; Kuang, Xingxing; Wong, Ming Hung (Informa UK Limited, 2020-10-01) Ultrafine particles (UFPs) with an aerodynamic diameter of <0.1 mu m are emerging as the most dominant and abundant particulate matter. Human exposure to these particles has increased dramatically, especially in the indoor environment as most of the population spend 80 to 90% time in the indoor environment. Due to the small size, it is believed that these particles will impose more dangerous and aggressive health impacts. However, knowledge of UFPs is still lacking as most of the previous studies focused on...
Use of membrane bioreactors in treatment and re-use of domestic wastewaters Komesli, Okan Tarık; Gökçay, Celal Ferdi; Department of Environmental Engineering (2006) This study was carried out to investigate performance of a Vacuum Rotating Membrane (VRM) type membrane bioreactor (MBR). During the study, the VRM plant was erected from scratch and operated in METU campus. The plant was composed of two tanks. First one was about 100 m3 and it was used for biological treatment; the second tank, about 30 m3, was used as filter chamber. The permeate flow rate was adjusted between 6 and 8.5 m3/h giving a hydraulic retention time (HRT) of 18 hours during the study. In the aera...
Investigation of phase inversion behavior of cellulose- ionic liquid solutions in relationship with membrane formation Durmaz, Elif Nur; Çulfaz Emecen, Pınar Zeynep; Department of Chemical Engineering (2017) Cellulose membranes were produced from ionic liquid solutions by phase inversion technique and thermodynamic and kinetic aspects of the process were investigated to relate these to membrane morphology and performance. In thermodynamics part, polymer-solvent, polymer-nonsolvent and polymer-solvent-nonsolvent interactions were examined experimentally, together with Hansen solubility parameter estimations. Kinetics part consisted of measuring phase inversion rate. Obtained membranes were characterized by their...
Evaluation of PCB dechlorination pathways in anaerobic sediment microcosms using an anaerobic dechlorination model Demirtepe, Hale; Kjellerup, Birthe; Sowers, Kevin R.; İmamoğlu, İpek (Elsevier BV, 2015-10-15) A detailed quantitative analysis of anaerobic dechlorination (AD) pathways of polychlorinated biphenyls (PCBs) in sediment microcosms was performed by applying an anaerobic dechlorination model (ADM). The purpose of ADM is to systematically analyze changes in a contaminant profile that result from microbial reductive dechlorination according to empirically determined dechlorination pathways. In contrast to prior studies that utilized modeling tools to predict dechlorination pathways, ADM also provides quant...

Citation Formats

O. T. KOMESLİ and C. F. Gökçay, “Investigation of sludge viscosity and its effects on the performance of a vacuum rotation membrane bioreactor,” ENVIRONMENTAL TECHNOLOGY, pp. 645–652, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/50748.