Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4909972 | Journal of Water Process Engineering | 2017 | 15 Pages |
Abstract
In this study, chemical cleaning of home-made mullite ceramic membranes which are fouled during oily wastewater treatment was investigated. The high performance and low cost mullite membranes were prepared by local low cost kaolin clay using extrusion method and the characteristic of the fabricated membranes was studied by different methods such as SEM, XRD, mean pore size and porosity analysis. Four types of chemical cleaning agents were selected for chemical in place cleaning of the fouled mullite membrane: Acid (sulfuric acid (H2SO4)), surfactant (sodium dodecyl sulfate (SDS)), chelating agent (ethylene diamine tetra acetic acid (EDTA)) and alkaline (sodium hydroxide (NaOH)). The fouled membranes were cleaned with single, binary and ternary solution of these chemical agents with the concentrations of 5Â mM and 10Â mM under the best operating conditions. After first cleaning step, membranes cleaned with vinegar and sodium bicarbonate solution as a novel chemical cleaning agent and named as second cleaning step. Results showed that by using single component chemical agent, EDTA and SDS with concentration of 5 and 10Â mM were the best cleaning agents which have flux recovery about 31.265% and 57.778% respectively after two steps of cleaning. Binary solution of SDSÂ +Â EDTA with the concentration of 5Â mM was the best cleaning agent among binary and ternary cleaning solution agents which led to 41.802% and 65.163% flux recovery in the first and second cleaning steps of chemical clanging process respectively.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Ehsan Garmsiri, Yaser Rasouli, Mohsen Abbasi, Amir Abbas Izadpanah,