高浓度淀粉废水水解--好氧循环一体化处理工艺的初步研究

A new recycling hydrolytic-aerobic combined process was developed to treat the high concentration organic wastewater. Simulated wastewater containing 10g·L-1 starch with a CODcr value of 10000 mg·L-1 was used. At first, the hydrolytic degradation and aerobic degradation process were examined in two batch reactors, respectively. In the stand-alone hydrolytic process, starch in the wastewater almost disappeared after 11 h treatment, but CODcr remained as high as 5803 mg·L-1 after two days. In the aerobic process, the biodegradation rate of starch was much slower during the first 11 h than that in the hydrolytic process, although the CODcr removal efficiency reached 89.6% and more than 90% starch could be degraded after 37.5 h. To determine the interaction effects of the two processes, a series of hydrolytic-aerobic combinations were examined in details. Hydrolytic process played an important role in the whole recycle combination process as it could improve the biodegradability of the high concentration     

多阶段曝气SBR法处理淀粉废水

采用多阶段曝气SBR法处理模拟淀粉废水,研究温度和缺氧曝气时间比对处理效果的影响。结果表明,SBR法在室温下就能高效地处理淀粉废水。多阶段SBR法中的缺氧反应可以促进淀粉水解酸化成小分子有机酸,提高了废水的可生化性,但对COD的去除不明显;曝气反应对COD的去除起主要作用。水解／好氧时间比的设置应由废水性质来决定。对于处理淀粉浓度6．0gm、相应COD值为6690mg／L的废水,“4h搅拌＋8h曝气”组合是最高效的,反应24h,COD去除率高达96．8％,出水COD仅215mg／L;而对于处理淀粉浓度8．0g/L、相应COD值为8920mg／L的废水,“6h搅拌＋12h曝气”组合是最高效的。只需处理30h,COD去除率高达94．4％,出水COD仅547mg／L。     

间歇式水解－好氧循环工艺处理聚乙二醇废水

引言 聚乙二醇(polyethylene glycol,简称 PEG)属于聚醚类高分子化合物,具有良好的溶解性、吸湿性、热稳定性,广泛应用于许多工业领域中.