Rapid startup and high rate nitrogen removal from anaerobic sludge digester liquor using a SNAP process
Rapid startup and high rate nitrogen removal from anaerobic sludge digester liquor using a SNAP process
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DOI：
10.1007/s10532-011-9495-8
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发表时间：
2012-02-01
期刊：
影响因子：
3.6
通讯作者：
Furukawa, Kenji
中科院分区：
文献类型：
--
作者：
Qiao, Sen;Nishiyama, Takashi;Furukawa, Kenji
本研究采用单级自养脱氮反应器，填充新型丙烯酸纤维生物质载体材料（Biofix），用于污泥消化池液的脱氮。为了快速启动，在厌氧氨氧化生物质附着在Biofix载体上后不久，将传统活性污泥添加到反应器中，这使得传统活性污泥在厌氧氨氧化生物质周围形成生物膜保护层。在氮负荷率为0.46 kg-N/m(3)/天的合成废水处理下，1周内脱氮效率达到75%。到合成废水处理期结束时，氮负荷率为1.0 kg-N/m(3)/天时，最大氮去除率增加至0.92 kg-N/m(3)/天。实际消化池原液处理过程中也实现了较高的脱氮率，在氮负荷率为0.93 kg-N/m(3)/天的情况下，最高脱氮率为0.83 kg-N/m(3)/天。 Biofix载体上厚厚的生物膜使厌氧氨氧化菌能够在5-6 mg/l的高DO浓度下存活，从而产生稳定和高的脱氮性能。 FISH 和 CLSM 分析表明厌氧氨氧化菌共存并被铵氧化菌包围。
In this study, a single-stage autotrophic nitrogen removal reactor, packed with a novel acrylic fiber biomass carrier material (Biofix), was applied for nitrogen removal from sludge digester liquor. For rapid start-up, conventional activated sludge was added to the reactor soon after the attachment of anammox biomass on the Biofix carriers, which allowed conventional activated sludge to form a protective layer of biofilm around the anammox biomass. The Nitrogen removal efficiency reached 75% within 1 week at a nitrogen loading rate of 0.46 kg-N/m(3)/day for synthetic wastewater treatment. By the end of the synthetic wastewater treatment period, the maximum nitrogen removal rate had increased to 0.92 kg-N/m(3)/day at a nitrogen loading rate of 1.0 kg-N/m(3)/day. High nitrogen removal rate was also achieved during the actual raw digester liquor treatment with the highest nitrogen removal rate being 0.83 kg-N/m(3)/day at a nitrogen loading rate of 0.93 kg-N/m(3)/day. The thick biofilm on Biofix carriers allowed anammox bacteria to survive under high DO concentration of 5-6 mg/l resulting in stable and high nitrogen removal performance. FISH and CLSM analysis demonstrated that anammox bacteria coexisted and surrounded by ammonium oxidizing bacteria.