Zhou Jian, Wanyan De-Qing, Huang Yong, Liu Xin, Yuan Yi, Li Xiang, Yao Peng-Cheng, Yang Peng-Bing, Xue Peng-Cheng
School of Environmental Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, China.
Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215009, China.
Huan Jing Ke Xue. 2016 Nov 8;37(11):4302-4308. doi: 10.13227/j.hjkx.201604079.
A novel type of nitrate removal process was investigated in this study, which coupled nitrate reduction by zero-valent iron(ZVI) with anaerobic ammonia oxidation(AMAMMOX). The zero-valent iron dosage was 71 g·L. The inoculation volume of ANAMMOX granular sludge was 200 mg·L. The agitation rate and environment reaction temperature of the CSTR was set up to 150 r·min and 33℃±0.5℃, respectively. The pH of influent was maintained at 7.0-8.0.The result indicated that ANAMMOX bacteria could survive in nitrate and ZVI supplied system under neutral condition. The reactor was set up quickly with the nitrogen removal rate of 0.12 kg·(m·d) on the first 5 days, and maintained over 0.1 kg·(m·d) nitrogen removal ability with the effluent nitrite and ammonia concentrations below 2.0 mg·L and pH value higher than 8.0. The nitrogen loss was up to 89% under the condition of 30-40℃, pH 4-6.Too extreme pH and temperature conditions were not favorable for the coupling reactions.
本研究考察了一种新型的硝酸盐去除工艺，该工艺将零价铁（ZVI）还原硝酸盐与厌氧氨氧化（ANAMMOX）相结合。零价铁投加量为71 g·L。厌氧氨氧化颗粒污泥接种量为200 mg·L。连续搅拌釜式反应器（CSTR）的搅拌速率和环境反应温度分别设置为150 r·min和33℃±0.5℃。进水pH维持在7.0 - 8.0。结果表明，厌氧氨氧化菌能够在中性条件下的硝酸盐和零价铁供应体系中存活。反应器启动迅速，前5天的脱氮速率为0.12 kg·(m³·d)，并保持超过0.1 kg·(m³·d)的脱氮能力，出水亚硝酸盐和氨浓度低于2.0 mg·L，pH值高于8.0。在30 - 40℃、pH 4 - 6的条件下，氮损失高达89%。过于极端的pH和温度条件不利于耦合反应。
