用营养缓释型生物填料强化好氧水处理过程(英文)  

BIOMASS CARRIER WITH SLOW RELEASE OF NUTRIENTS FOR ENHANCED AEROBIC PROCESS

作　　者：海景[1] 程江[1] 肖立军[1] 皮丕辉[1] 文秀芳[1] 杨卓如[1] 

机构地区：[1]华南理工大学化工与能源学院

出　　处：《陕西科技大学学报（自然科学版）》2008年第2期24-28,共5页Journal of Shaanxi University of Science & Technology

基　　金：广东省自然科学基金(04020114)

摘　　要：在普通聚乙烯生物填料中添加适量的羟基磷灰石(HAP)、淀粉、蔗渣、活性炭和磁粉,形成营养缓释型生物填料(改性填料),研究了所改性填料的表面结构、润湿性能、营养缓释性能和挂膜性能.结果表明,改性聚乙烯填料较普通聚乙烯填料水接触角减小26%,具有较好的营养缓释性能,挂膜时间缩短了3 d;好氧生物处理中完全去除125.5 mg/L的酚,采用普通聚乙烯填料需19 h,而采用改性填料只需13 h,填料改性后的机械强度符合长期使用要求.The conventional polyethylene （PE） biofilm carrier was modified by additives of hydroxyapatite （HAP）. starch, bagasse, activated carbon and magnetic powder, for improving its hydrophilicity and providing nutrients for attached microbes in aerobic treatment of toxic wastewater. The slow release rate of nutrients may be controlled by the amount of bagasse and activated carbon supplemented in the carrier. The contact angle of the modified po- lyethylene surface decreased from 80° （with respect to polyethylene itself） to 59°. and the period of biofilm formation on the modified carrier with acclimated sludge reduced from 7 days （on PE carrier without additives） to 4 days. The results also showed that the biological degradation of phenol was enhanced by use of biofilm carriers supplemented with additives for slow release of nutrients. The biodegradation process was reduced from 19 h to 13 h for complete removal of 127. 5 mg/L phenol from synthetic wastewater by ,using the modified carrier. The strength performance assay demonstrated that the modified carrier was suitable for long operation in practical application.

关 键 词：酚生物降解 亲水性 生物填料 营养 缓释 

分 类 号：X703.5[环境科学与工程—环境工程]