稻壳作为反硝化碳源在海水中的脱氮性能研究

摘要

Rice husk is a kind of denitrification carbon source. Its main nutrients composition,microstructure,pore structure,carbon release rate,and denitrification rate in seawater have been investigated. The results show that rice husk contains over-sized fibers,starch and crude protein,which can be utilized by microbes. The contained organic carbon is about 58%. Rice husk also contains lots of hydrophilic groups with rough and porous surface ,which is good for microbes to adhere and grow. The removing rate of nitrate from seawater reaches 59%,by using rice husk as deni-trification carbon source. Being a carbon source ,rice husk could continuously supply organic carbon ,meeting the continuous need of microbes.%以稻壳为反硝化碳源,研究了稻壳的营养组成、微观形貌、孔隙结构、在海水中的释碳速率以及作为反硝化碳源在海水中的脱氮效果.结果表明,稻壳中含有能被微生物利用的粗纤维、淀粉和粗蛋白等,总有机碳达到58%以上;稻壳含有大量亲水官能团,表面粗糙且拥有大量孔隙结构,非常利于微生物附着生长.以稻壳为反硝化碳源,海水中硝酸盐去除率可达59%,且具备较好的持续供碳能力,可满足其作为碳源被微生物持续利用的需求.