Towards stable operation of a dynamic membrane bioreactor(DMBR):Operational process,behavior and retention effect of dynamic membrane
Release time:2024-08-09
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- Affiliation of Author(s):
- 环境与市政工程学院
- Journal:
- Journal of Membrane Science
- Key Words:
- 中文关键字：Dynamic membrane bioreactor，英文关键字：Dynamic membrane bioreactor
- Abstract:
- An experimentalstudywasconductedforcharacterizingthewholeoperationalcycleofadynamic membrane bioreactor(DMBR).Withanylonmeshof25 μm poresizeassupportmaterial,the filtration flux wassuddenlyhalvedwithin5min,indicatingarapidcakelayerformation.Thenthe flux declined graduallyandbecamestableat t¼4 h,indicatingthematurationofthedynamicmembrane(DM)for stable operation.Byperiodicalbottomaeration,the flux keptstableuntil t¼24 hbeforephysicalcleaning should beconductedforDMregeneration.Insuchanoperationalcycle,effluent turbidityabout3NTU wasonlydetectedatthestart,droppedtoabout0.5NTUafter5minandkeptlowerafterwards.Effective and stableremovalofchemicaloxygendemand(COD),ammonia,phosphoruswasachievedinthe 2-month continuousoperationperiod.Althoughairbackwashingbroughtabouteffectiverecoveryofthe flux, additionalsurfacebrushingcouldfurtherremovethe “irremovablefouling”. Bymorphologicaland physicochemicalanalysis,itwasidentified thattheDMcouldretain15.3%ofCODand10.6%ofpoly- saccharides fromtheactivatedsludge,aswellascertainamountofprotein-likeandhumic-likesub- stances. ThesemembranefoulingsubstancesshouldberemovedbyphysicalcleaningforDMre- generation.
- Note:
- 王晓昌
- Co-author:
- 田文瑞,HuuHaoNgo
- First Author:
- chenrong,王晓昌,huyisong
- Indexed by:
- Journal paper
- Volume:
- 卷：498
- Issue:
- 期：
- Page Number:
- 页：20-29
- Translation or Not:
- no
- Date of Publication:
- 2016-01-01