摘要
采用MUCT工艺作为处理高氮磷浓度酿造废水好氧处理单元,考察装置分别处于全程硝化与短程硝化两阶段时对氮、磷元素的处理效果。全程硝化阶段,考察水力停留时间以及在缺氧Ⅰ池投加碳源改变C/N条件下工艺对酿造废水处理效果的影响,结果表明,当水力停留时间HRT为10 h、缺氧Ⅰ区C/N为6时,工艺对装置的处理效果最优,原水阶段氨氮、总磷平均去除率分别能达到66.17%和74.03%。短程硝化阶段,缩短HRT至8 h、控制DO质量浓度在0.5~0.8 mg/L,以亚硝态氮积累率(NAR)作为区分全程与短程硝化两阶段的指标,最终在混合液回流比为150%、硝化液回流比为250%、回流污泥比为90%时,成功启动短程硝化;原水阶段,NAR稳定在60%左右,氨氮去除率在50%以上,TP平均去除率达到77.94%,最高达91.59%。
MUCT process is used as an aerobic treatment unit to treat with brewing wastewater with high concentrations of nitrogen and phosphorus.In the whole-cut nitrification stage,the effects of different HRT and C/N in anoxic I tank are investigated.The results show that the process presents the best treatment effect with average removal rates of ammoniacal nitrogen and total phosphorus in raw water stage reaching 66.17%and 74.03%,respectively when HRT is 10 h and C/N in anoxic I tank is 6.As for short-cut nitrification stage,HRT is shortened to 8 h,the concentration of DO is controlled at 0.5-0.8 mg·L^(-1),and the accumulation rate of nitrite nitrogen(NAR)is used as the index to distinguish whole-cut nitrification from short cut nitrification.Finally,the short-cut nitrification is successfully started up when the reflux ratio of mixed liquor is 150%,the reflux ratio of nitrification liquid is 250%,and the reflux sludge ratio is 90%.In the raw water stage,NAR remains around 60%stably,the removal rate of ammoniacal nitrogen exceeds 50%,and the average removal rate of total phosphorus reaches 77.94%with the highest at 91.59%.
作者
冯强
陈亚平
杨开明
母宣贻
蒙美旭
FENG Qiang;CHEN Ya-ping;YANG Kai-ming;MU Xuan-yi;MENG Mei-xu(College of Civil Architecture and Environment,Xihua University,Chengdu 610039,China;Sichuan Academy of Environmental Sciences,Chengdu 610040,China)
出处
《现代化工》
CAS
CSCD
北大核心
2021年第11期159-163,共5页
Modern Chemical Industry
基金
四川省科技计划项目(2019JDZH0002)。
关键词
MUCT
酿造废水
处理效果
全程硝化
短程硝化
MUCT
brewing wastewater
treatment effect
whole-cut nitrification
short-cut nitrification
