摘要
采用AO工艺,考察了在污泥减量过程中臭氧(O3)氧化对生物系统硝化和反硝化能力的影响。结果表明,在每克SS中O3投量为0.05 g时,氧化后污泥中的CODCr由37.5 mg/L增至700 mg/L,TN由4.86 mg/L增至36.6 mg/L,NH4+-N由0.353mg/L增至7.49 mg/L,NO3--N由2.19 mg/L增至5.15 mg/L。虽然氧化系统出水NH4+-N浓度略高于对照系统,但氧化系统NH4+-N的去除率大于98%,硝化能力基本没有受到O3氧化的影响。O3氧化污泥后增加的有机物作为附加的碳源循环至缺氧段,提高了反硝化的效果,当污泥氧化比例分别为10%、20%、30%时,进入缺氧段的CODCr/TN分别平均增至11.21、11.56、11.88,氧化系统的反硝化效果也随之分别提高5%、25%、37%。
Continuous experiment in lab scale anoxic-oxic（AO） process was carried out to investigate the effect of sludge ozonation on nitrification and denitrification. The results indicated that CODCr ,TN, NH4^＋ -N, NO3^- -N concentration of sludge increased after ozonation. The CODe, increased from 37.5 mg/L to 700 mg/L; the TN increased from 4.86 mg/L to 36.6 mg/L;the NH4^＋-N increased from 0. 353mg/L to7.49 mg/L;the NO3^--N increased from 2.19 mg/L to 5.15 mg/L at the ozone dose of 0.05 gO3/gSS. Though the effluent NH4^＋-N concentration of ozone reactor was a little higher than that of contrast reactor, the removal rate of NH4^＋-N reached more than 98 % and nitrification capabilities scarcely were altered by ozonation. Increasing organics from sludge ozonation could improve denitrification capacity when ozonated sludge was recycled to the anoxic zone. CODCr/TN ratio of the anoxic zone averaged 11.21,11.56,11.88 respectively and denitrification capacity of ozone reactor increased by 5,25 and 37% respectively by daily treating 10% ,20%and 30% of the reactor sludge,
出处
《环境污染与防治》
CAS
CSCD
北大核心
2006年第3期187-190,共4页
Environmental Pollution & Control
关键词
臭氧氧化
硝化
反硝化
AO工艺
Ozonation Nitrification Denitrification AO process
