利用藻-溞系统去除富营养水体中磷的研究  

Phosphorus Removal of Eutrophic Water by Algae-Daphnia System

作　　者：马金奉[1] 邓春生[1] 张广恪 张燕荣[1] 王妮珊[1] 刘美珠[1] 耿兵[1] 

机构地区：[1]中国农业科学院农业环境与可持续发展研究所,北京100081

出　　处：《中国农业科技导报》2014年第1期148-156,共9页Journal of Agricultural Science and Technology

基　　金：国家水体污染控制与治理专项(2012ZX07202-009)资助

摘　　要：微藻对水体有明显的净化作用,探讨了在开放条件下蛋白核小球藻及蛋白核小球藻-大型溞修复系统对污水中磷的去除效果。研究表明接种8 h蛋白核小球藻对磷达到过饱和吸收,过饱和吸收量是(3.12±0.39)×10-10mg/cell;接种量1.00×105cells/mL^3.72×106cells/mL无菌培养96 h对总磷的去除率达到75%;正常生长过程中藻细胞除磷量(饱和含磷量)为(1.46±0.05)×10-10mg/cell;在每日补充营养盐的开放环境下,72 h^216 h藻细胞除磷量(饱和含磷量)稳定在(1.50±0.50)×10-10mg/cell,微藻系统稳定运转时除磷量为(0.06±0.01)mg/(L·d),此时藻密度为1.11×106~3.79×106cells/mL。藻-溞修复系统表明,藻密度在9.28×105~1.60×106cells/mL范围内,藻溞数量比为3.02×106∶1时藻-溞修复系统能稳定运行。Microalgae has obvious effect on water purification, this paper explored phosphorus removal capacity of Chlorella pyrenoidosa in open system and purification effect of wastewater by Algae-Daphnia system. It was indicated that after incubated in sterile wastewater for 8 h, algae can achieve max amount of phosphorus absorption, （2.99±0. 45）×10^-10mg/cell. After incubated in sterile wastewater for 96 h, the rate of phosphorus removal reached to 75%, when inoculation quantity of algae was between 1.00×10^5 cells/mL and 3.72×10^6 eells/mL. The phosphorus removal capacity of each multiplied algae cell（ saturated phosphorus content） was （1.46±0.05）×10^-10 mg/cell in the sterile wastewater, and it was（1.50±0.50） ×10^-10 mg/cell in the open system from 72 h to 216 h, under the condition that nutrition was added to the system every day. The amount of phosphorus removal was （0.06±0.01）mg/（ L·d） , when the system worked well and algae＇s density was between 1.11×10^6 and 3.79×10^6 eells/mL. Algae-Daphnia system was constructed based on a controlled density of algae, at which Chlorella pyrenoidosa had great capacity of uptaking phosphorus. Algae-Daphnia system can work well by controlling the amount ratio of Chlorella/Daphnia at 3.02×10^6：1, when algae density was between 0.928×10^6 millions and 1.60×10^6 millions cells/mL.

关 键 词：富营养化 蛋白核小球藻 大型溞 生物操纵 除磷 

分 类 号：X524[环境科学与工程—环境工程]