酶氧前处理新工艺节能减排效果评估

将酶氧前处理新工艺与传统碱氧前处理工艺在水、电、汽消耗及废水的可生化性方面进行了对比，结果表明，新工艺的废水色度低，COD降低34.09%，节水25.63%，节约蒸汽33.77%，节电9.82%，综合节能32.70%。同时新工艺处理后的棉型织物各项指标（白度、毛效、棉籽壳去除率、退浆率、强力等）均达到半制品质量要求。此外，还分别就H2O2和NaOH对PVA在溶液均相体系中的作用进行分析，发现NaOH对PVA大分子基本没有降解作用，在热碱作用下，绝大多数的PVA发生溶胀以溶胶状态留在溶液中，而H2O2处理后的PVA溶液，均降解为分子量10,000以下的小分子有机物，其中分子量在1,000以下的小分子有机物含量占到55.6%，易于后续的废水处理，因此该工艺推广应用前景广阔。

Evaluation of energy conservation and emissions reduction of enzyme oxygen pretreatment

The new technique on enzyme oxygen pretreatment of cotton fabric was investigated. Compared with the conventional alkali oxygen pretreatment, the new enzyme oxygen pretreatment could save 25.63% water , 33.77% steam, 9.82% electricity and save 32.70% standard coal, reduce 34.09% COD and the color of waste water was light. The whiteness, capillary effect, cottonseed shell removal rate, desizing rate and strength of the fabric with the new technique had met the desiration of semi-finished goods. The effects of hydrogen peroxide and NaOH on polyvinyl alcohol (PVA) in homogeneous solution were investigated. The result shows that NaOH had not any effect on the degradation of PVA besides sweling. However, after treated with H2O2 , PVA was degraded to small molecular organics and the molecular weight was less than 10,000. The amount of small molecular organics, molecular weight less than 1000, reached 55.6%. This enabled the subsequent treatment easy. The new technique has wide and potential application in the future in dyeing and finishing field.