藻酸盐固定化颗粒耐久性研究  

Investigation on Stability of Alginate-immobilized Beads

作　　者：聂荣[1,2] 翟建平[3] 

机构地区：[1]江苏省交通科学研究院环境工程研究所 [2]南京大学环境学院环境工程系,污染控制与资源化研究国家重点实验室,南京210093 [3]南京大学环境学院环境工程系,污染控制与资源化研究国家重点实验室

出　　处：《农业环境科学学报》2008年第1期338-341,共4页Journal of Agro-Environment Science

基　　金：国家“863”计划课题(2002AA601012-4)

摘　　要：针对藻酸盐载体耐久性差的缺点,选用了3种不同的方法(补充Ca、添加Ba和减少包埋量)来提高藻酸盐固定化颗粒的耐久性。结果表明,Ca2+的流失是引起藻酸盐凝胶强度下降的主要因素。减少包埋生物量仅能短期提高藻酸盐载体的耐久性,而补充Ca2+、添加Ba2+不但能使固定化颗粒长时间保持稳定,且加固后的固定化颗粒具有良好的生化性能。固定化污泥能快速稳定地去除富营养化湖水中的磷,并能实现磷的回收,这有利于推进磷资源的可持续利用。The study was to improve the rheological stability of immobilized activated sludge beads for wastewater treatment. Three methods （calcium recruitment, barium accession and cell reduction） were applied to improve the mechanical stability of alginate immobilized beads. It was shown that the replacement of calcium from alginate gel was the main factor causing alginate gel dissolving in media. Calcium alginate immobilized sludge beads without any amendment were disintegrated in 10 days wastewater treatment. Cell reduction immobilized sludge beads showed more stable mechanical stability in 15 days and 19 days （50% and 75% cell reduction respectively）, but performed less biological activity. Either calcium recruitment or barium accession immobilized activated sludge beads demonstrated a high biological and rheological stability, the reinforced beads were not out of shape, and had good bioactivity during the 20 days wastewater treatment. Phosphorus could be removed and recovered effectively rapidly from eutrophicated water using alginate-immobilized sludge. The investigation offered a new opportunity for phosphorus recovery and phosphorus sustainability.

关 键 词：海藻酸钙 海藻酸钡 耐久性 磷回收 污水处理 

分 类 号：X703.5[环境科学与工程—环境工程]