酒精废水部分亚硝化-厌氧氨氧化脱氮的可行性  

Removal of Nitrogen from Alcohol Wastewater by PN-ANAMMOX

作　　者：周正[1,2] 林兴[1,2] 王凡[1,2] 顾澄伟 沈婧 袁砚[1,2] 金润[1,2] 

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]苏州科技大学环境生物技术研究所,苏州215009 [3]苏州市吴江区环境应急与事故调查中心,苏州215200

出　　处：《环境科学》2017年第8期3377-3384,共8页Environmental Science

基　　金：国家重点研发计划项目(2016YFC0401103);国家自然科学基金项目(51478284;51408387);江苏省特色优势学科二期项目;江苏省水处理技术与材料协同创新中心项目

摘　　要：采用一体式部分亚硝化-厌氧氨氧化反应器研究了酒精废水脱氮的可行性.结果表明,在pH 7.8±0.5,温度30~35℃,好氧区ORP值120~150 mV的条件下,历时40 d成功地启动了一体式PN-ANAMMOX反应器,总氮去除速率由0.125kg·(m^3·d)^(-1)上升至0.75 kg·(m^3·d)^(-1)左右,说明接种成熟的亚硝化生物膜和厌氧氨氧化颗粒污泥可达到快速启动的效果;在酒精废水处理的研究中表明,酒精废水对PN-ANAMMOX反应器的影响主要是由其中可生物降解的TOC导致,短期内可生物降解TOC的加入,ANAMMOX反应区首先受到影响;酒精废水中100 mg·L^(-1)可生物降解TOC浓度可以使总氮去除速率由0.75 kg·(m^3·d)^(-1)降低至0.25 kg·(m^3·d)^(-1)左右,降低约66%,这种抑制是可以恢复的;采用不同浓度梯度酒精废水驯化PN-ANAMMOX反应器内功能菌群,随着进水浓度梯度的增加,总氮去除速率均出现了先下降再上升的趋势,通过延长HRT和适当提高PN阶段的溶解氧的方式,有利于反应器整体脱氮效能的提高,完全以酒精废水作为进水时,总氮去除速率稳定在0.65 kg·(m^3·d)^(-1)左右,脱氮效果较好,说明一体式PN-ANAMMOX可用于回用酒精废水的处理.An integrated partial nitrification anaerobic ammonia oxidation reactor was used to explore the feasibility of nitrogen removal from recycled ethanol wastewater. The results show that the integrated partial nitrification-anaerobic ammonia oxidation（ PNANAMMOX） reactor was started successfully after 40 d under the conditions of pH 7. 8 ± 0. 5,temperature 30-35℃,and aerobic ORP value 120-150 mV. The total nitrogen removal rate of 0. 125 kg·（ m^3·d）^（-1）increased to 0. 75 kg·（ m^3·d）^（-1）,Inoculation of mature nitrosated biofilms and anaerobic ammonium oxide granules can accelerate the start of the reactor. The effects of alcohol wastewater on the PN-ANAMMOX reactor were mainly caused by biodegradable TOC,The biodegradable TOC concentration of 100 mg·L^（-1）in alcohol wastewater can reduce the removal rate of total nitrogen from 0. 75 kg·（ m^3·d）^（-1）to 0. 25 kg·（ m^3·d）^（-1）,this inhibition can be restored. Different concentrations of alcohol wastewater were dosed into the PN-ANAMMOX reactor to acclimate the bacteria. The total nitrogen removal rate first decreased and then increased,as the influent concentration gradient increased,which was beneficial for improving the efficiency of nitrogen removal by extending the HRT and increasing the dissolved oxygen in the PN stage. Finally,the nitrogen removal rate stabilized at 0. 65 kg·（ m^3·d）^（-1）. These results show that PN-ANAMMOX can be used for the treatment of alcohol wastewater.

关 键 词：部分亚硝化 厌氧氨氧化 酒精废水 生物脱氮 可生物降解有机物 

分 类 号：X703.1[环境科学与工程—环境工程]