摘要
采用复合生物反应器,对应用臭氧氧化实现污泥减量进行了研究。2个相同的复合生物反应器平行运行,1个作为对照系统,1个作为氧化系统。反应器内装有半软性填料,投加量为10%。曝气池中悬浮污泥浓度为1 500 mg/L左右,生物膜浓度为2 000 mg/L左右。试验结果表明,随着臭氧氧化污泥比例的增加,污泥表观产率系数也随之降低,当臭氧投量为0.05 g O3/gSS,每天氧化的污泥分别为反应器内污泥的10%,20%,30%时,污泥表观产率系数分别减少28.2%,44.9%,75.8%。虽然随着污泥氧化比例的增大,氧化系统出水CODcr略有增加,但氧化系统仍能保持其生物处理能力,CODcr去除率在92%以上;2个系统之间氨氮的去除率相差不大,氧化系统的硝化能力基本没有受到臭氧氧化的影响。
Continuous experiments in a lab scale hybrid biological reactor was carried out to investigate the effect of sludge reduction by ozonation. Two reactors were in operation in parallel with MLSS in suspension 1 500 mg/L, MLSS attached 2 000 mg/L. One hybrid bioreactor was used as control and one with ozonation. The carrier used was semi-soft carrier with a volume of 10% of that of the reactor. The results indicated that the observed yield coefficient of the ozone reactor decreased with increasing fraction of the activated sludge by ozone treatment. The observed yield coefficient of the ozone reactor decreased by 28.2, 44.9 and 75.8% respectively by daily treating 10, 20 and 30% of the reactor sludge with a ozone dosage of 0.05 g O3/gSS. The effluent CODcr concentration of the ozone reactor slightly increased with increasing fraction of the activated sludge by ozone treatment, but the biological treatment performance of ozone reactor was maintained and the removal rate of CODcr reached more than 92%. The removal rate of NH4-N in the two reactors were slightly different and the nitrification capabilities were little altered by ozonation.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第5期799-803,共5页
Periodical of Ocean University of China
关键词
复合生物反应器
臭氧氧化
污泥表观产率系数
污泥减量
hybrid biological reactor
ozonation
microbial apparent yield coefficient
sludge reduction
