CAJ | 학술논문

采用交替限氧-厌氧和低充放比(30%)运行模式,在SBR反应器中成功启动全自养脱氮(CANON)工艺,启动过程经历常规硝化主导阶段、短程硝化主导阶段和全自养脱氮阶段,总氮去除速率和总氮去除效率分别达到(312±15)mg/(L·d)和(71.2±4.3)%.培养得到的污泥中颗粒污泥(粒径≥300μm)和絮状污泥(粒径<300μm)体积分别占污泥总体积的39%和61%.在自养脱氮性能恶化的SBR反应器进水中长期添加适量N2H4,反应器脱氮性能得以恢复甚至强化,反应器总氮去除速率升高到(480±34)mg/(L·d),颗粒污泥的比例增加到污泥总体积的51%.
채용교체한양-염양화저충방비(30%)운행모식,재SBR반응기중성공계동전자양탈담(CANON)공예,계동과정경력상규초화주도계단、단정초화주도계단화전자양탈담계단,총담거제속솔화총담거제효솔분별체도(312±15)mg/(L·d)화(71.2±4.3)%.배양득도적오니중과립오니(립경≥300μm)화서상오니(립경<300μm)체적분별점오니총체적적39%화61%.재자양탈담성능악화적SBR반응기진수중장기첨가괄량N2H4,반응기탈담성능득이회복심지강화,반응기총담거제속솔승고도(480±34)mg/(L·d),과립오니적비례증가도오니총체적적51%.
Complete autotrophic nitrogen removal over nitrite (CANON) process was successfully startedup with a low volumetric exchange ratio (30%) under alternative limited-oxygen/anaerobic mode in SBR, and the total nitrogen removal rate as well as the total nitrogen removal efficiency reached (312±15)mg/(L·d) and (71.2±4.3)%, respectively. The startup of CANON SBR experienced nitrification-leading phase, partitial-nitritation-leading phase and CANON phase in general. Granular biomass and floccular biomass were both found in SBR. The volume of granular biomass (radius≥300μm) and floccular biomass (radius<300μm) made up 39% and 61% of total sludge volume, respectively. The long-term N2H4 addition recovered and enhanced their autotrophic nitrogen removal capacity, with the total nitrogen removal rate increased to (480±34)mg/(L·d). The proportion of granular biomass increased to 51%of total sludge volume.