为了优化煤制气废水关键污染物去除方式，采用四级生物强化反应器进行中试研究，分析了工艺启动过程与反应器沿程水质变化特征，探讨了水力停留时间、外加碳源对同步硝化反硝化（SND）效率和处理效果的影响。结果表明：在ρ(NH4+-N)=126～165 mg/L、ρ(TN)=139～178 mg/L、ρ(总酚)=286～352 mg/L、ρ(COD)=1 340～2 296 mg/L的进水条件下，反应器历时27 d完成了微生物的驯化与固定化；在水力停留时间HRT=62 h并且实施限氧曝气的条件下，C1～C4反应室均可实现SND，反应器出水NH4+-N(氨氮)、TN（总氮）、总酚和COD（化学需氧量）浓度分别为0.12～1.25、79.1～109、17.8～26.7、128～196 mg/L；在HRT为38.8～62 h内，缩短HRT可显著提高反应器TN〖JP2〗去除效果；HRT=62 h条件下的TN去除率与SND率分别为38.9%和37.3%，HRT=38.8 h条件下的TN去除率与SND率分别达到53.0%和51.2%；300 mg/L 浓度下的5种甲醇外加方式均可进一步提升TN去除效果，方式Ⅱ运行条件下的TN去除效果最佳，TN去除率与SND率分别达到92.8%和94.4%；方式Ⅰ、Ⅱ、Ⅲ、Ⅳ〖JP3〗均可通过共代谢作用提升COD去除效果，方式Ⅰ运行条件下的COD去除率最高，达到91.8%。

Abstract:[WT5”BZ]In order to optimize the key pollutant removal mode of coal gasification wastewater,a bio-augmentated reactor composed of 4 tandem units was used to conduct pilot scale tests. The start-up procedure and water quality variation characteristics along the reactor were analyzed. In addition,the influences of hydraulic retention time and additional carbon source on the simultaneous nitrification & denitrification(SND)efficiency and removal effect were also discussed. The results indicate that under the influent quality of ρ(NH4+-N)126 to 165 mg/L,ρ(TN)139 to 178 mg/L,ρ(total phenol)286 to 352 mg/L and ρ(COD)1 340 to 2 296 mg/L,the microbial acclimation and immobilization of the reactor were completed in 27 days. Under the oxygen-limiting aeration condition and HRT 62 h ,SND was achieved in all the reaction chambers from C1 to C4,and the mass concentrations of NH4+-N,TN,total phenol,COD in the last effluent were respectively 0.12-1.25,79.1-109,17.8-26.7，128-196 mg/L. The TN removal effect of the reactor was enhanced by HRT reduction in the HRT range from 38.8 h to 62 h. The TN removal rate and SND efficiency were 38.9% and 37.3% when the HRT=62 h. For comparison,the TN removal rate and SND efficiency were 53.0% and 51.2% when the HRT=38.8 h. The TN removal effect could be all further enhanced by the 5 modes of carbon source dosing with 300 mg/L. The reactor achieved highest TN removal rate under the dosing mode of Ⅱ. The coresponding TN removal rate and SND efficiency were 92.8% and 94.4%. The COD removal effect could be enhanced by the modes of Ⅰ,Ⅱ,Ⅲ and Ⅳ,and the COD removal rate achieved the maximum value of 91.8% under the condition of mode Ⅰ.