在合成螯合剂存在的情况下好氧颗粒的形成。
Formation of aerobic granules in the presence of a synthetic chelating agent.
作者信息
Nancharaiah Yarlagadda V, Joshi Hiren M, Krishna Mohan Tulsi V, Venugopalan Vayalam P, Narasimhan Sevilimedu V
机构信息
Water and Steam Chemistry Division, Chemistry Group, Bhabha Atomic Research Centre, BARC Facilities, Kalpakkam, India.
出版信息
Environ Pollut. 2008 May;153(1):37-43. doi: 10.1016/j.envpol.2007.11.017. Epub 2007 Dec 31.
This paper examines the development of aerobic granular sludge in the presence of a synthetic chelating agent, nitrilotriacetic acid (NTA), in sequencing batch reactors (SBR). The growth of seed sludge at 0.26 mM, 0.52 mM and 1.05 mM of NTA was found to be significantly lower as compared to that in the absence of NTA. Aerobic granulation was significantly enhanced in the three SBRs (R2, R3 and R4), which were fed with 0.26 mM, 0.52 mM and 1.05 mM of NTA as a co-substrate, in comparison to the acetate-alone fed SBR (R1). After 2 months of operation, the mean diameter of the biomass stabilized at 0.35 mm in R1 (acetate alone), as compared to 2.18 mm in R4 (1.05 mM NTA+acetate). NTA degradation was established in SBRs, with almost complete removal during the SBR cycle. Batch experiments also showed efficient degradation of NTA by the aerobic granules.
本文研究了在序批式反应器（SBR）中，合成螯合剂次氮基三乙酸（NTA）存在的情况下好氧颗粒污泥的发育情况。与不存在NTA的情况相比，发现种子污泥在0.26 mM、0.52 mM和1.05 mM的NTA浓度下的生长显著降低。与仅投喂乙酸盐的SBR（R1）相比，在以0.26 mM、0.52 mM和1.05 mM的NTA作为共底物投喂的三个SBR（R2、R3和R4）中，好氧颗粒化显著增强。运行2个月后，R1（仅乙酸盐）中生物质的平均直径稳定在0.35 mm，而R4（1.05 mM NTA + 乙酸盐）中为2.18 mm。在SBR中确定了NTA的降解，在SBR循环期间几乎完全去除。批次实验还表明好氧颗粒对NTA有高效降解作用。
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