一种大水体太阳能自动增氧装置的研发与试验

研发一种大水体太阳能自动增氧装置，为大水体的缺氧、水体污染提供一种解决方法。太阳能自动增氧装置由太阳能光伏发电系统、检测与智能增氧系统、自动化驱动系统组成。光伏发电系统充分利用太阳能资源，解决了电能消耗问题；检测与智能增氧系统实现了增氧过程中氧溶解浓度检测和智能感应运行；自动化驱动系统通过智能感应信号和电子差速控制系统实现增氧机原地转向、转弯和直行3种运动模式的移动，增加了增氧面积。使用太阳能自动增氧装置增氧试验表明，80 min内1 m水深处溶氧量增加0.79 mg/L，2 m水深处溶氧量增加0.78 mg/L，3m水深处溶氧量增加0.77 mg/L，4 m水深处溶氧量增加0.78 mg/L；改善水质试验表明能有有效提高水体溶氧，降低氮磷含量；养殖试验表明，增加鲤产量35.3%、鲢鳙产量31.2%。

Development and Testing of an Automatic Aeration Device in Large Water Body Based on Solar Energy

A decrease in dissolved oxygen (DO) accompanies deteriorating water quality in reservoirs and lakes. Mechanical aeration is the traditional means of mitigating hypoxia and, while effective, it is expensive, requires an external power supply and stationary aeration can result in low oxygen transfer efficiency. In this study, we developed an automatic aeration device, based on traditional mechanic aeration, and tested its effectiveness. Unlike the traditional aerators, this new automatic aeration device is powered by solar energy rather than an external energy supply. In addition to a solar photovoltaic power system, the aeration system includes a DO measurement system, an intelligent aeration system and an automatic drive. The aeration rate is controlled by an intelligent aeration system coupled to the DO sensors. An automatic driving system moves the aerator toward low DO water and increases the area and efficiency of oxygen transfer. Aerator testing showed that the DO concentration at different depths in the large water body clearly increased and the DO level was more uniform at different depths. Within 80 min, the dissolved oxygen at four water depths (1m, 2m 3m, 4m) increased by 0.79 mg/L, 0.78 mg/L, 0.77 mg/L and 0.78 mg/L, respectively. Aeration also reduces TP and TN and thus can reduce nutrient levels as well as increasing DO in fishponds. Finally, using the automatic aerator increased fish growth rate by 35.3% for common carp and by 31.2% for silver and big head carps. This research and demonstration project helps address both the hypoxia and pollution problems in large water bodies and can increase aquaculture production.