High effect flocculant compound bacteria were screened out with the product bacteria of flocculant in soil. Their system appraising study shows that two were actionomyces and the other was microzyme among the three ba...High effect flocculant compound bacteria were screened out with the product bacteria of flocculant in soil. Their system appraising study shows that two were actionomyces and the other was microzyme among the three bacteria. According to nSrDNA, the three bacteria were marked at a molecule level and the system growth tree was established, ensuring the position of compound bacteria at the molecule level. The purificant which was made of the compound bacteria has spreading value because of its excellent clearing effect for organic and inorganic polluted water.展开更多
Isotactic-and atactic-poly(N-propyl-2-vinylpyridinium bromide)QIP2VP and QAP2VP were used asflocculants for kaolin suspension.The effects of their molecular structure of floeculation were studied.Theresults are as fol...Isotactic-and atactic-poly(N-propyl-2-vinylpyridinium bromide)QIP2VP and QAP2VP were used asflocculants for kaolin suspension.The effects of their molecular structure of floeculation were studied.Theresults are as follows:(1)The ability of flocculation of QAP2VP is better than that of QIP2VP.(2)The flocculating efficiency of QAP2VP,but not QIP2VP,increased as the molecular weight in-creased.(3)In the range of lower degree of quaternization,the efficiency of flocculation increased as thedegree of quaternization of flocculants decreased.(4)An abnormal phenomenon,which is considered as the“homocharge stabilization”,was discoveredat a certain concentration of flocculants.(5)An equation of the relationship among the experimental parametars,such as sedimentation rate,sedimentation volume and turbidity,was derived.展开更多
为使生物法制备2,3-丁二醇的后续分离纯化过程顺利进行,研究了絮凝法预处理2,3-丁二醇发酵液。选用10种絮凝剂,以絮凝率和蛋白去除率为指标,分别考察了絮凝剂、质量浓度、pH值、温度和搅拌时间等条件对2,3-丁二醇发酵液的絮凝效果、浓...为使生物法制备2,3-丁二醇的后续分离纯化过程顺利进行,研究了絮凝法预处理2,3-丁二醇发酵液。选用10种絮凝剂,以絮凝率和蛋白去除率为指标,分别考察了絮凝剂、质量浓度、pH值、温度和搅拌时间等条件对2,3-丁二醇发酵液的絮凝效果、浓度及后续萃取过程的影响,得出较优絮凝条件:以氯化铁为絮凝剂,质量浓度为23 g/L,pH值5.1,温度为20—50℃,搅拌时间15 m in,静置20 m in。在此工艺条件下,2,3-丁二醇的絮凝率和蛋白去除率均可高达98%以上,为后续的分离纯化过程奠定基础。展开更多
基金the "973" Project of China ( No 2004CB418505) Innovation Foundation of Jilin University ( No419070200045)
文摘High effect flocculant compound bacteria were screened out with the product bacteria of flocculant in soil. Their system appraising study shows that two were actionomyces and the other was microzyme among the three bacteria. According to nSrDNA, the three bacteria were marked at a molecule level and the system growth tree was established, ensuring the position of compound bacteria at the molecule level. The purificant which was made of the compound bacteria has spreading value because of its excellent clearing effect for organic and inorganic polluted water.
文摘Isotactic-and atactic-poly(N-propyl-2-vinylpyridinium bromide)QIP2VP and QAP2VP were used asflocculants for kaolin suspension.The effects of their molecular structure of floeculation were studied.Theresults are as follows:(1)The ability of flocculation of QAP2VP is better than that of QIP2VP.(2)The flocculating efficiency of QAP2VP,but not QIP2VP,increased as the molecular weight in-creased.(3)In the range of lower degree of quaternization,the efficiency of flocculation increased as thedegree of quaternization of flocculants decreased.(4)An abnormal phenomenon,which is considered as the“homocharge stabilization”,was discoveredat a certain concentration of flocculants.(5)An equation of the relationship among the experimental parametars,such as sedimentation rate,sedimentation volume and turbidity,was derived.
文摘为使生物法制备2,3-丁二醇的后续分离纯化过程顺利进行,研究了絮凝法预处理2,3-丁二醇发酵液。选用10种絮凝剂,以絮凝率和蛋白去除率为指标,分别考察了絮凝剂、质量浓度、pH值、温度和搅拌时间等条件对2,3-丁二醇发酵液的絮凝效果、浓度及后续萃取过程的影响,得出较优絮凝条件:以氯化铁为絮凝剂,质量浓度为23 g/L,pH值5.1,温度为20—50℃,搅拌时间15 m in,静置20 m in。在此工艺条件下,2,3-丁二醇的絮凝率和蛋白去除率均可高达98%以上,为后续的分离纯化过程奠定基础。
