新型膜生物反应器预处理海水淡化过程中对膜污染的长期影响。
Long-term effect on membrane fouling in a new membrane bioreactor as a pretreatment to seawater desalination.
机构信息
Faculty of Engineering and IT, University of Technology, Sydney (UTS), PO Box 123, Broadway, NSW 2007, Australia.
The Centre for Marine Bio-Innovation, The School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia; The Singapore Centre on Environmental Life Sciences Engineering, Nanyang Technological University, Singapore.
出版信息
Bioresour Technol. 2014 Aug;165:60-8. doi: 10.1016/j.biortech.2014.03.098. Epub 2014 Mar 28.
Submerged membrane adsorption bio-reactors (SMABR) were investigated as a new pretreatment for seawater reverse osmosis (SWRO) desalination. They were tested with different doses of powder activated carbon (PAC) on-site for a long-term. The biofouling on the membrane was assessed in terms of DNA (cells) and polysaccharide distribution. MBR without PAC addition resulted in severe fouling on membrane. When PAC is added in the MBR, PAC could reduce the organic fouling. Hence the biofilm formation on membrane was reduced without any membrane damage. PAC also helped to remove low molecular weight (LMW) organics responsible for biofouling of RO membrane. A linear correlation between assimilable organic carbon (AOC) and LMW organics was observed. A small amount of PAC (2.4-8.0g of PAC/m(3) of seawater) was sufficient to reduce biofouling. It indicated that SMABR is an environmentally-friendly biological pretreatment to reduce biofouling for SWRO.
浸没式膜吸附生物反应器（SMABR）被研究作为反渗透海水淡化（SWRO）的一种新预处理方法。采用不同剂量的粉末活性炭（PAC）在现场进行了长期试验。通过 DNA（细胞）和多糖分布来评估膜上的生物污垢。在 MBR 中不添加 PAC 会导致膜严重结垢。当 PAC 添加到 MBR 中时，PAC 可以减少有机结垢。因此，在没有任何膜损伤的情况下，减少了生物膜在膜上的形成。PAC 还有助于去除导致 RO 膜生物结垢的低分子量（LMW）有机物。观察到可同化有机碳（AOC）和低分子量有机物之间存在线性相关性。少量的 PAC（每立方米海水 2.4-8.0g 的 PAC）足以减少生物污垢。这表明 SMABR 是一种环保的生物预处理方法，可减少 SWRO 的生物结垢。
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