稻壳作为反硝化碳源在海水中的脱氮性能研究

Research on the denitrification capacity of rice husk as denitrification carbon source in seawater

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。

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 denitrification carbon source. Being a carbon source,rice husk could continuously supply organic carbon,meeting the continuous need of microbes.