一段式短程硝化-厌氧氨氧化生物脱氮技术与工艺

分别从一段式短程硝化-厌氧氨氧化技术的原理、影响因素、工艺反应器形式及应用等几个方面进行阐述,归纳了温度、p H、基质浓度、DO等对该工艺的影响;总结了一段式短程硝化-厌氧氨氧化反应器的启动特征;比较了颗粒污泥和生物膜两类生物载体系统的脱氮效能;最后分析了一段式短程硝化-厌氧氨氧化技术存在的问题及发展趋势。

STUDY ON SULFATE RADICAL DEGRADING ORGANIC MATTER IN SECONDARY EFFLUENTS

Advanced oxidation technology as a further treatment after secondary treatment is one of the approaches to treat secondary effluents for meeting the standard of reuse water.This study is based on the sulfate radicals' applications in advanced oxidation technology,discussing the effects of degrading refractory organic pollutants from secondary effluents by sulfate radicals produced by persulfate(PS) and peroxymonosulfate(PMS) induced by energy stimulation (heat and UV) and transition metal catalysis (Fe、Ag (Ⅰ)、Co (Ⅱ) 、Fe (Ⅱ)).The experimental results demonstrate that sulfate radical—advanced oxidation technology can effectively degrade dissolved organic carbon(DOC) in secondary effluents.Ag (Ⅰ) + PS in transition metal catalysis system expressed the highest removal efficiency (93％) of DOC in secondary effluents,80 ℃ + PS of energy stimulation system also showed a fine removal efficiency(88％) of DOC.However,energy stimulation system is better than transition metal catalysis system when the aspect of catalyst's concentration and general degradation effects was considered.