XHIT型中孔煤质炭饱和态特性及热再生回用效能

Saturation Characteristics and Thermal Regeneration Efficiency of Innovative Mesoporous Carbon XHIT in Bio-Enhanced Activated Carbon Process

对XHIT型中孔煤质炭构建的生物增强活性炭中试(处理体积流量1.0 m^3/h)净水效能、饱和炭(S-XHIT)特性、热再生条件及再生炭(TR-XHIT)回用效能进行了研究。结果表明,XHIT累计可处理水量和CODMn总量分别为96.06 m^3/kg(562 d)和121.0 mg/g。S-XHIT表面生物量达到44.52 mmol/g,比表面积(SBET)、总孔容(VT)和中孔容(Vme)的降低率分别为33.90%、54.77%和59.85%。热解失量和响应曲面实验表明,热再生优化炭化和活化温度分别为600℃(15 min)和820℃(120 min),该条件下TR-XHIT的失量率为10.77%;SBET、VT和Vmes分别达到1018 m^2/g、0.8856 cm^3/g和0.5326 cm^3/g。基于RT-XHIT构建的BEAC中试工艺体系累计可处理水量和有机污染物总量分别为65.18 m^3/kg(404 d)和91.75 mg/kg。

Purification performance,saturation carbon(S-XHIT)characteristics,thermal regeneration conditions and regenerated carbon(TR-XHIT)recycling efficiency of pilot of bio-enhanced activated carbon(treatment volume flow rate was 1.0 m^3/h)constructed by the innovative mesoporous carbon XHIT were studied.The results showed that,the cumulative water treatment capacity and total CODMn of XHIT were 96.06 m^3/kg(562 d)and121.0 mg/g.S-XHIT surface biomass reached 44.52 mmol/g,the reduction rate of specific surface area(SBET),total pore volume(VT)and mesoporous volume(Vme)was 33.90%,54.77%and 59.85%respectively.Results of pyrolysis weightlessness and response surface design indicated that,the thermal regenerated optimization carbonization and activation temperature was 600℃(15 min)and 820℃(120 min)respectively,under this conditions,the weight-loss rate of TR-XHIT was 10.77%,and its SBET,VT,and Vme were 1018 m^2/g,0.8856 cm^3/g and 0.5326 cm^3/g,respectively.The cumulative water treatment capacity and total organic pollutants of the BEAC pilot process constructed by TR-XHIT were 65.18 m^3/kg(404 d)and 91.75 mg/kg respectively.