Organics and nitrogen removal and sludge stability in aerobic granular sludge membrane bioreactor
Organics and nitrogen removal and sludge stability in aerobic granular sludge membrane bioreactor
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DOI：
10.1007/s00253-008-1466-6
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发表时间：
2008-05
影响因子：
5
通讯作者：
Jing-feng Wang;Xuan Wang;Zuguo Zhao;Jun-Wen Li
中科院分区：
文献类型：
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作者：
Jing-feng Wang;Xuan Wang;Zuguo Zhao;Jun-Wen Li
将好氧颗粒污泥技术与膜生物反应器（MBR）相结合，建立了新型好氧颗粒污泥膜生物反应器（GMBR）。GMBR对模拟废水具有良好的有机物去除和同步硝化反硝化（SND）性能。当进水总有机碳（TOC）为56.8- 132.6mg/L时，GMBR对TOC的去除率为84.7- 91.9%。当进水氨氮为28.1- 38.4mg/L时，氨氮去除率为85.4- 99.7%，总氮去除率为41.7- 78.4%。不同粒径污泥的批式实验表明：（1）好氧条件下絮凝污泥几乎不具有反硝化能力;（2）颗粒污泥的SND能力主要由颗粒污泥引起;（3）反硝化速率和总氮去除率随粒径的增大而提高。此外，对GMBR中污泥形态稳定性的研究表明，运行初期虽然有部分大于0.9 mm的颗粒污泥发生解体，但颗粒污泥能够保持其颗粒形态的稳定性，运行结束时，GMBR中稳定的颗粒污泥（大于0.18 mm）占总污泥浓度的56-62%。序批式活性污泥法（SBR）系统向膜生物反应器（MBR）系统运行方式的转变与大颗粒污泥的部分解聚密切相关。
Novel aerobic granular sludge membrane bioreactor (GMBR) was established by combining aerobic granular sludge technology with membrane bioreactor (MBR). GMBR showed good organics removal and simultaneous nitrification and denitrification (SND) performances for synthesized wastewater. When influent total organic carbon (TOC) was 56.8–132.6 mg/L, the TOC removal of GMBR was 84.7–91.9%. When influent ammonia nitrogen was 28.1–38.4 mg/L, the ammonia nitrogen removal was 85.4–99.7%, and the total nitrogen removal was 41.7–78.4%. Moreover, batch experiments of sludge with different particle size demonstrated that: (1) flocculent sludge under aerobic condition almost have no denitrification capacity, (2) SND capacity was caused by the granular sludge, and (3) the denitrification rate and total nitrogen removal efficiency were enhanced with the increased particle size. In addition, study on the sludge morphology stability in GMBR showed that, although some granular sludge larger than 0.9 mm disaggregated at the beginning of operation, the granular sludge was able to maintain the stability of its granular morphology, and at the end of operation, the amount of granular sludge (larger than 0.18 mm) stabilized in GMBR was more than 56–62% of the total sludge concentration. The partial disaggregation of large granules is closely associated with the change of operating mode from sequencing batch reactor (SBR) system to MBR system.