营养缓释型生物填料的制备及在废水处理中的应用

 针对有毒抗（难）降解芳香族污染物生物处理时挂膜启动慢、降解速率低的缺陷，在新研制的营养缓释型填料中，添加该类污染物降解时微生物共代谢所需的一级基质，并加入活性炭、蔗渣作为控释剂形成营养缓释型改性填料，研究了所得改性填料的表面结构、营养缓释性能、挂膜及降解性能。结果表明，改性聚乙烯填料表面粗糙多孔，具有良好的营养缓释性能；同时，其微生物挂膜速率明显加快，挂膜所需时间缩短了3 d；在初始浓度为127mg/L的苯酚降解实验中，苯酚降解速率明显快于传统聚乙烯填料，在降解后的第8小时，改性填料苯酚去除率高达91.7%，比传统聚乙烯填料提高37.7%，脱氢酶活性更是普通填料的2倍以上。

Preparation and Application of Biomass Carrier with Slow Release of Nutrients

Biofilm water treatment technology were widely used in treating various wastewaters. However, a major drawback in bioreactors based on aerobic oranaerobic processes is the slow rate of biofilm formation due to the lack of biological affinity and activity of the biofilm carrier/packing, and the toxicity of the wastewater. In this paper the polypropylene biofilm carrier was modified by adding additives of hydroxyapatite(HAP) and starch as the co metabolism substrates, and activated carbon and bagasse as the release controlling agent. The result showed that the new carrier had rough surface with some inside holes.The biofilm formation time of the modified carrier was 3 days less than that of the common carrier, and the phenol removal rate during biodegradation increased clearly. At the 8th hour for degradation of 127 mg/L phenol from synthetic wastewater by using the modified carrier, the removal efficiency approached to 91.7%, 37.7% higher than that with the common carrier. And the dehydrogenase activity of the biomass on the modified carrier was twice as that on the common carrier.