摘要
采用ASBR反应器,通过改变进水COD/NH_4^+-N值,研究了COD/COD/NH_4^+-N对厌氧氨氧化与反硝化耦合反应的影响.结果表明:在COD为300mg/L,NO2--N为145mg/L时,COD/COD/NH_4^+-N是影响厌氧氨氧化对耦合反应脱氮贡献及COD/NH_4^+-N去除率的主要因素,但不会对NO2--N去除率产生影响.当COD/COD/NH_4^+-N值在1~3.25时,厌氧氨氧化对耦合反应的脱氮贡献率基本稳定在73.03%;当COD/COD/NH_4^+-N值在3.75时,厌氧氨氧化对耦合反应脱氮的贡献率开始由71.76%下降至约55%;当COD/COD/NH_4^+-N值在4.25~5.25时,厌氧氨氧化与反硝化的脱氮贡献率基本相等;当COD/COD/NH_4^+-N值在6.5~12.5时,反硝化的脱氮贡献率随着COD/COD/NH_4^+-N值的增大由51.69%增大到79.62%.耦合反应器中活性污泥的颗粒化程度不断增强,颗粒污泥的粒径主要分布在0.6~1.5mm范围内,污泥沉降性能良好.
An anaerobic sequencing batch reactor（ASBR） was operated to investigate the effect of COD/COD/NH4＋-N on carbon and nitrogen removal via anaerobic ammonium oxidation and denitrification by gradually increasing influent ammonia concentration. The results showed that when COD and NO2--N were 300 and 145mg/L, respectively, COD/COD/NH4＋-N was the main factor affecting the nitrogen removal contribution by anammox process. However, the ratio of COD/COD/NH4＋-N had no significant effect on nitrite remove. When COD/COD/NH4＋-N was 13.25, the nitrogen removal contribution rate made by anammox process was 73.03%. When COD/COD/NH4＋-N was 3.75, it declined from 71.76% to 55%. When COD/COD/NH4＋-N was 4.255.25, anammox and denitrification played equal role in nitrogen removal. When COD/COD/NH4＋-N was 6.512.5, the nitrogen removal contribution rate made by denitrification process increased from 51.69% to 79.62%. Anammox granulation became stronger and stronger in the reactor, and the granular diameter was mainly between 0.61.5mm. The settling performance of sludge was good.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2016年第3期759-767,共9页
China Environmental Science
基金
国家自然科学基金项目(51278258
51478229)
山东省自然科学基金项目(BS2015HZ007)
山东省高等学校科技计划项目(J15LC61)
青岛市应用基础研究项目(13-1-4-203-jch)
关键词
厌氧氨氧化
反硝化
COD/NH4+-N
生物脱氮
anaerobic ammonium oxidation
denitrification
COD/NH4＋-N
biological nitrogen removal
