摘要
采用多级A/O工艺(MsAO)和生物膜强化多级A/O工艺(BEMsAO)对煤气化废水进行处理,研究其对煤气化废水中典型污染物的去除特征。结果表明,当进水COD为546.9~2 221 mg/L时,MsAO和BEMsAO对COD均有较好的去除效果,去除率分别为91.67%和89.03%,去除负荷分别为514.9 g/(m^3·d)和364.6 g/(m^3·d);进水NH4^+-N的质量浓度为195.4~520.3 mg/L时,MsAO出水的NH_4^+-N的质量浓度平均为149.4 mg/L,去除率为63.42%。BEMsAO出水的NH_4^+-N的质量浓度平均为1.32 mg/L,去除率为99.48%,BEMsAO对NH_4^+-N的去除效果优于MsAO,NH_4^+-N的平均去除率提高了36.06%。当水力负荷由0.08 m3/(m^2·d)逐步升高到0.11 m^3/(m^2·d)时,MsAO中NH_4^+-N的去除率显著降低;尽管水力负荷增加了37.5%,但BEMsAO中NH_4^+-N的去除率始终维持在99.00%以上,BEMsAO耐负荷冲击能力优于MsAO。
Multi-stage AgO process （MsAO） and biofilm enhanced multi-stage AgO process （BEMsAO） was used to treat coal gasification wastewater, and the removal characteristics of typical pollutants were researched. The results showed that when the COD ofinfluent was 546.9-2 221 mg/L, MsAO and BEMsAO present good performance of COD removal, the removal rate was 91.67% and 89.03% respectively, and the removal of volume load was 514.9 g/（m3· d） and 364.6 g/（m3· d）, respectively. When the mass concentration of NH4＋-N of influent reached 195.4-520.3 mg/L, the NH4＋-N removal rate by BEMsAO was better than MsAO, the removal rate was 99.48% and 63.42% respectively which was enhanced about 36.06%, and the average mass concentration of NH4＋-N of effluent was 1.32 mg/L and 149.39 mg/L, respectively. When the hydraulic loading rate increased from 0.08 m3/（m2· d） to 0.11 m3/（m2·d）, the NH4＋-N removal rate by MsAO decreased significantly, although the hydraulic loading rate increased 37.5%, the NFL＋-N removal rate by BEMsAO always remained above 99.00%. The resistance to load impact of BEMsAO process is clearly better than MsAO process.
作者
黄达
杨永哲
高壮
岳山
HUANG Da YANG Yongzhe GAO Zhuang YUE Shan(School of Environmental and Municipal Engineering, Xi＇an University of Architecture and Technology, Xi＇an 710055, China)
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第8期114-118,共5页
Technology of Water Treatment
基金
高等学校博士学科点专项科研基金(20116120110008)
陕西省自然科学基础研究计划重点项目(2010JZ008)
关键词
多级A/O工艺
生物膜强化多级A/O工艺
煤气化废水
脱氮
multi-stage A/O process
biofilm strengthen multi-stage A/O process
coal gasification wastewater
nitrogen removal
