Abstract
Submerged ceramic membrane bioreactors (SCMBRs) are more efficient combinations of traditional activated hazardous sludge and new membrane separation processes in wastewater treatment. Suspended solids are separated from hazardous effluent using microfilter ceramic membranes in SCMBRs. A high loaded wastewater was treated using an SCMBR employing a homemade tubular ceramic membrane in laboratory scale. Hydraulic Retention Time (HRT) was 32 h and COD range was varied from 2000 to 5000 mg/l. COD removal was evaluated to be more than 90% after a week and the lab scale SCMBR showed desired performance for the wastewater treatment. Mixed Liquor Suspended Solid (MLSS) was increased from 2000 to 4000 mg/L during the SCMBR operation time.
Highlights
Wastewater management and development of new processes to treat different wastewaters have found considerable attentions to save the environment and supply growing requests on water [1,2,3,4]
For a transmembrane pressure (TMP) of 0.2 bar, initial sharp decay is not the case indicating there is no serious membrane pore blockage and membrane surface fouling can be removed by means of aeration
In the case of other studied TMPs, at the early period of filtration, the flux reduces sharply due to the rapid membrane pore blockage and the significant biomass and dust deposition
Summary
Wastewater management and development of new processes to treat different wastewaters have found considerable attentions to save the environment and supply growing requests on water [1,2,3,4]. Ceramic microporous membranes have been used for this propose because of their advantages like good chemical stability, favorable mechanical strength, stability at high temperatures, good antimicrobial ability, and high separation efficiency [26]. Ceramic membrane bioreactors have been used for wastewater treatment in the food industry, purification of alkaline cleaning solutions in the dairy industry, and clarification and purification of drinking water [27,28,29,30]. These purification and/or treatment result in reusing wastewaters and/or extending usage period before discharging them and saving the environment, energy, water, and chemicals [31].
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