浅水湖泊防控黑臭水体复氧技术  

Re-oxygenation technology for prevention and control of black water in shallow lakes

作　　者：刘海洪[1] 李先宁[1] 宋海亮[1] 

机构地区：[1]东南大学能源环境学院,南京210096

出　　处：《东南大学学报（自然科学版）》2015年第3期526-530,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家水专项太湖项目资助项目(2009ZX07101-011)

摘　　要：试验研究了复氧技术防控浅水湖泊黑臭水体发生的机理和复氧设备.研究发现,当太湖水在藻浓度1.0×10^8～5.0×10^8cells/L,水温约28℃时,静止过程中水中的CODM n、二甲基三硫醚浓度持续升高,6 d后发生明显的类湖泛的水体黑臭现象,表明采用人工复氧维持水中1.0mg/L溶解氧的方法可防控藻源性局部黑臭水体发生.研发出3种升流循环复氧装置,结果显示,Ⅲ型装置充氧及能量利用率性能最佳.中试试验显示,Ⅲ型中试溶解氧升高及扩散趋势与fluent模型相符,80 h时溶解氧平均值为3.65 mg/L,溶解氧平均上升速率为0.045 4 mg/（L·h）;升流循环复氧机在模拟黑臭水体应急处置时,48 h时影响半径可达到50 m.初步证明升流循环复氧装置可作为应急充氧设备,用于类似太湖的浅水湖泊黑臭水体的治理领域.The mechanism of re-oxygenation technology to control black water aggregation（ BWA）in a shallowlake was explored. Static experiments showthat under a temperature of 28 ℃ and the blue algae density of 1. 0 × 10^8 to 5. 0 × 10^8 cells / L,the concentration of CODM n,dimethyl trisulfide（ DM TS） in Taihu Lake continually rises,and finally becomes black and putrid after 6 d. It shows that artificial aeration to maintain dissolved oxygen（ DO） content exceeding 1. 0 mg / L in water can prevent and control the occurrence of black and putrid water. Three types of up-flowing cycle re-oxygenation（ UFCR） devices for shallowlake oxygenation are developed,and type Ⅲ is optimal. The simulated black water pilot test shows that the diffusion trend of the DO for the type Ⅲ device is consistent with the corresponding fluent software model. After 80 h,the concentration of DO is 3. 65 mg / L,and the average rising rate is 0. 045 4 mg /（ L ·h）. The influence radius of type Ⅲdevice can reach 50 m after 48 h when the UFCR is used to treat black and putrid water. This device can be used to prevent and control the emergence of black and putrid water in shallowlakes.

关 键 词：复氧装置 浅水湖泊 黑水团 富营养化 太湖 

分 类 号：X703.1[环境科学与工程—环境工程]