厌氧酸化-二级PSB流化床工艺处理高浓度有机废水

采用厌氧酸化+二级光合细菌(PSB)流化床的组合工艺对植物压榨发酵废水进行降解实验,一级流化床(PSB1)中填料为轻质多孔炭渣,二级流化床(PSB2)为活性炭,扰动方式分别采用机械流化和机械气动组合流化,稳定运行40d。结果表明,进水酸化12h后CODCr由80000~120000mg/L降至63000~95000mg/L,进而由系统出水回流稀释至8000~12000mg/L,进入二级流化床反应器,PSB1白天厌氧光照、夜间微好氧,PSB2白天微好氧、夜间好氧,停留48h,CODCr降至295.8~384mg/L,稳定实现96.2%以上的CODCr去除率,TN去除率为71.3%。

ANAEROBIC ACIDIFICATION-AEROBIC AND DOUBLE PHOTOSYNTHETIC BACTERIA FLUIDIZED BEDS TO TREAT HIGH CONCENTRATION ORGANIC WASTEWATER

The anaerobic acidification-aerobic photosynthetic bacteria fluidized beds are adopted to treat the ferment wastewater of plants pressing in lab scale. The first photosynthetic bacteria fluidized bed is backfilled with light carbon residue with porous, the second one is backfilled with activated carbon, mechanical agitation and mechanical agitation-air agitation are used, stable operation for 40 d. The result shows that the COD_ Cr will be decreased from 80 000 ～ 120 000 mg/L to 63 000 ～ 95 000 mg/L during acidifying the wastewater for 12 h, after diluted to 8 000 ～ 12 000 mg/L by domestic sewage entering into fluidized bed reactors and then staying for 48 h under anaerobic in the daytime and microaerobic at night, the COD_ Cr decreased to 295.8～ 420 mg/L, COD_ Cr removal rate is up to 95.8% so the removal rate of TN is 71.3%.