RESEARCH OF THE PNEUMOHYDRAULIC AERATOR OXIDIZING ABILITY
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Abstract
Pneumohydraulic aeration is usually carried out by joint supplying the liquid and gas phases under excess pressure to various devices. These devices are similar in design to ejectors and fuel injectors. The bubble formation mechanism during pneumohydraulic aeration is still not entirely clear and therefore does not have any general theory. The bubble formation mechanism during pneumohydraulic aeration is still not entirely clear and therefore does not have any general theory. It is possible to answer the difficult question, what is the mechanism of dispersion in a pneumohydraulic aerator, using theoretical studies on similar or close devices, which are pneumatic and hydraulic nozzles, in addition to ejectors. Pneumohydraulic aerators are promising aeration devices for biological wastewater treatment processes because they have high oxidizing capacity, low clogging degree, the ability to control the hydrodynamics in the facility, the simplicity of its creation, high aeration quality and they have no excessive energy costs for its implementation. This indicates that the developed pneumohydraulic aerator is efficient and competitive, and also it has optimal dimensions for using in a multifunctional independent power station, which is developed and investigated ISTU.
Subject of research. Iinvestigation of the pneumohydraulic aerator oxidative capacity. This aerator was developed at the Irkutsk National Research Technical University and it has dimensions that are optimal for the investigated multifunctional independent power station.
Materials and methods. The experiments were carried out using a designed test bench, where pure water was saturated with oxygen. The experimental technique was specially developed for the stand.
Results: It is shown that the optimal oxygen concentration for the process of organic substances oxidation on a model medium, which is 9.58 mg/dm3, is achieved at a distance of 0.1 m from the aerator nozzle at an ambient temperature of 16 oC. The mixing capacity of the rotating pneumohydraulic aerator makes it possible to maintain microorganisms in active sludge in suspension. Such characteristics allows the aerator to has optimal dimensions for use in a multifunctional independent power station.
Conclusions: Having developed an aerator, it can said that it allows to saturate the liquid with atmospheric oxygen without using of additional energy-intensive installations while simultaneously mixing it. Due to this process the dissolved oxygen spreads more efficiently throughout the volume and maintains the microorganisms in suspension. It makes possible to consider the aerator more efficient and competitive among other devices for liquid aeration and to recommend it for implementation at sewage treatment stations in biological wastewater treatment plants. The important point is aerator dimensions are optimal for use in autonomous stations for wastewater treatment and disposal, as well as in a in a multifunctional independent power station.
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References
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