微能耗双罐并联加压控制蓝藻生长技术研究

Research on the technology of controlling the growth of cyanobacteria under dual-tank parallel pressurization with micro-energy consumption

为了研究微能耗双罐并联加压控藻船的控藻效果和机理,采用现场围隔试验,研究了加压蓝藻在不同风浪作用下的垂向分布情况、不同水深的光合生产力。结果表明,围隔试验控藻率达到98.7%;加压蓝藻在静水和风浪条件下垂向分布均为表层少下层多,静水中大部分沉淀于水底,悬浮蓝藻只占24.6%,在0.8 m水深、25 cm风浪作用下表层蓝藻仅增加了1.2百分点,自然蓝藻呈上多下少的垂向分布。加压蓝藻和自然蓝藻光合生产力相当,沿太湖水深逐步减少。由于加压蓝藻与自然蓝藻垂向分布的差异,加压蓝藻在水体垂向平均生产量小于自然蓝藻。

In order to study the algal control effect and mechanism of micro-energy consumption dual-tank parallel pressurized algae control ship,a field enclosure test was used to study the vertical distribution of pressurized cyanobacteria under different wind-wave actions and the photosynthetic productivity of different water depths.The results showed that the algae control rate reached 98.7%in the enclosure test.The vertical distribution of pressurized cyanobacteria under static water and wind-wave conditions was less on the surface and more on the lower layer.Most of the cyanobacteria in static water deposited on the bottom,and suspended cyanobacteria accounted for only 24.6%.When the water depth was 0.8 m and the wind-wave was 25 cm,the suspended cyanobacteria only increased by 1.2 percentage points.Natural cyanobacteria presented a vertical distribution with more on top and less on bottom.The photosynthetic productivity of pressurized cyanobacteria was similar to that of natural cyanobacteria,and it gradually decreased along the water depth of Taihu Lake.Due to the difference in vertical distribution between pressurized cyanobacteria and natural cyanobacteria,the average vertical production of pressurized cyanobacteria in water was lower than that of natural cyanobacteria.