以月桂醇聚醚硫酸酯钠(AES)、月桂醇聚醚硫酸酯铵(AESA)为例:通过污泥耗氧速率的变化了解表面活性剂对活性污泥的抑制情况;用磁力搅拌表面曝气法代替震荡培养法测试了城镇污水处理厂的活性污泥对表面活性剂的生物降解能力;用污泥负荷表...以月桂醇聚醚硫酸酯钠(AES)、月桂醇聚醚硫酸酯铵(AESA)为例:通过污泥耗氧速率的变化了解表面活性剂对活性污泥的抑制情况;用磁力搅拌表面曝气法代替震荡培养法测试了城镇污水处理厂的活性污泥对表面活性剂的生物降解能力;用污泥负荷表征表面活性剂的初级生物降解速率,便于计算用活性污泥法处理表面活性剂至其起泡性能消失所需的时间。实验结果表明,AES、AESA浓度≥200 mg·L^(-1)时对活性污泥中部分微生物有抑制作用。当AES、AESA浓度≤100 mg·L^(-1)时,用城镇污水处理厂的活性污泥好氧处理的初级生物降解速率分别为0.06 kg AES.(kg MLSS·d)^(-1)、0.06 kg AESA.(kg MLSS·d)^(-1);用活性污泥法好氧处理20小时后的CODCr去除率分别为75.7%、79.9%;AESA的可生物降解性优于AES。展开更多
Some methods have been developed to use CO2 as the raw material to produce degradable polymeric materials.The terpolymer of carbonate（PPGC） synthesized with the terpolymerization of CO2,propylene oxide and γ-butyro...Some methods have been developed to use CO2 as the raw material to produce degradable polymeric materials.The terpolymer of carbonate（PPGC） synthesized with the terpolymerization of CO2,propylene oxide and γ-butyrolactone（GBL）.GBL offered an ester structural unit making the copolymer easier to hydrolyze.Hence, PPCG should be of good degradability.In order to study its degradability,the polymer PPCG was used as materials for drag loading.The drug-loaded microspheres were obtained by the W/O/W type emulsions method. The microspheres were spherical in shape with smooth surfaces and good dispersion. The drug loading and encapsulation efficiency were 36.7% and 78.6%, respectively. The degradative behave was studied by SEM, XRD and drug release curves in different degradation medium were obtained.It was found that these microspheres could be degraded at faster speed in the basic media, while could not be degraded in the acidic media.The higher pH value of the medium was,the faster the initial degradative speed was.展开更多
文摘以月桂醇聚醚硫酸酯钠(AES)、月桂醇聚醚硫酸酯铵(AESA)为例:通过污泥耗氧速率的变化了解表面活性剂对活性污泥的抑制情况;用磁力搅拌表面曝气法代替震荡培养法测试了城镇污水处理厂的活性污泥对表面活性剂的生物降解能力;用污泥负荷表征表面活性剂的初级生物降解速率,便于计算用活性污泥法处理表面活性剂至其起泡性能消失所需的时间。实验结果表明,AES、AESA浓度≥200 mg·L^(-1)时对活性污泥中部分微生物有抑制作用。当AES、AESA浓度≤100 mg·L^(-1)时,用城镇污水处理厂的活性污泥好氧处理的初级生物降解速率分别为0.06 kg AES.(kg MLSS·d)^(-1)、0.06 kg AESA.(kg MLSS·d)^(-1);用活性污泥法好氧处理20小时后的CODCr去除率分别为75.7%、79.9%;AESA的可生物降解性优于AES。
文摘Some methods have been developed to use CO2 as the raw material to produce degradable polymeric materials.The terpolymer of carbonate（PPGC） synthesized with the terpolymerization of CO2,propylene oxide and γ-butyrolactone（GBL）.GBL offered an ester structural unit making the copolymer easier to hydrolyze.Hence, PPCG should be of good degradability.In order to study its degradability,the polymer PPCG was used as materials for drag loading.The drug-loaded microspheres were obtained by the W/O/W type emulsions method. The microspheres were spherical in shape with smooth surfaces and good dispersion. The drug loading and encapsulation efficiency were 36.7% and 78.6%, respectively. The degradative behave was studied by SEM, XRD and drug release curves in different degradation medium were obtained.It was found that these microspheres could be degraded at faster speed in the basic media, while could not be degraded in the acidic media.The higher pH value of the medium was,the faster the initial degradative speed was.
