Treatment of methanol wastewater with two-stage and two-phase anaerobic process

The two-stage and two-phase anaerobic process (TSTP) composed of hydrolytic acidification reactor,first-order and second-order external circulation anaerobic reactors (EC) was taken to treat methanol wastewater. Test results show that TSTP process is quick start-up in 51 d, and the maximum VFA of hydrolytic acidification reactor effluent reaches 876 mg/L. Under the condition of volume loading of 6.56 kgCOD/m3·d, COD removal rate of the first-order EC reactor is about 85%, and under the condition of volume loading of 1.02 kgCOD/m3·d, COD removal rate of the second-order EC reactor is about 50%. When the inflow COD of TSTP process is between 7000-11000 mg/L, its effluent COD is lower than 600 mg/L. In the biological conversion process of methanol into methane,the production of acetic acids as an intermediate product can be ignored and the direct production of methane from methanol is predominant.

外循环厌氧法处理啤酒废水的研究

采用外循环(EC)厌氧反应器处理啤酒废水,考察了其处理效果和颗粒污泥的形成及其性能。结果表明,以好氧剩余污泥为接种污泥,采用低负荷、高去除率的启动方式,可使污泥很快实现颗粒化,所形成的颗粒污泥沉降性能良好,粒径主要集中在0.8～2.0mm。系统稳定运行期,当进水COD为2000～4000mg/L、碱度为1000～1500mg/L、温度为30～32℃、容积负荷为10～12kgCOD/(m3.d)时,系统对COD的去除率稳定在80%左右。外循环厌氧反应器处理啤酒废水的效果良好、运行稳定、抗冲击负荷能力强。

外循环厌氧反应器处理啤酒废水的试验研究

针对厌氧反应器的布水系统容易产生短流,在反应器内造成死区,从而减少反应器的有效容积的缺点,研究开发了外循环厌氧(EC)反应器并进行处理啤酒废水的试验研究．结果表明,外循环厌氧(EC)反应器采用旋流配水装置,布水均匀,存在明显的颗粒污泥区和污泥悬浮区,稳定运行时COD的容积负荷可达10～12 kg/m^3,COD去除率75%～80%左右,并具有启动速度快,颗粒污泥容易形成,耐冲击性负荷强等特点．

外循环厌氧反应器接种好氧污泥的启动研究

内蒙古自治区某啤酒厂的外循环厌氧反应器完成了首次启动后由于操作问题,导致系统运行崩溃。第2次接种后续生物接触氧化池的好氧污泥进行重新启动,经过20d的驯化,好氧污泥转变为活性较高的厌氧污泥;采用低负荷高去除率的方式运行40d后,塔内形成了部分颗粒污泥;之后,为了提高颗粒污泥量快速提高进水流量,COD去除率先突然下降然后缓慢升高。当进水流量达到最大时启动结束,此时塔内颗粒污泥量和COD去除率仍在缓慢上升。