Combined advanced photochemical technologies and biological processes for the treatment of multicomponent wastewater

该提案涉及建模、优化和开发结合高级氧化技术（aot）和生物工艺处理多组分废水，如市政、屠宰场、石化和可溶性聚合物废水。迄今为止，缺乏关于利用成本效益高的综合工艺有效处理实际废水的资料。由于个别化学、物理或生物过程在其有效性或经济可行性方面的限制，几乎没有一个过程本身是充分适用的。尽管aot的主要优点是其破坏性和非选择性以及高反应速率，但该处理方法的运营成本和资金成本很高。另一种处理方法是通过光化学预处理来提高废水的生物降解性。开发、优化、工程模型、动力学、协同效应，并最终设计用于实际废水处理的组合工艺是本研究计划的主要目标。本项目一期从经济性、接触次数、总体效率、协同效应、操作参数、工艺顺序等方面对UV/超声、UV/过氧化氢、UV/超声/过氧化氢等混合和组合aot进行了优化。一个中试工厂的声光反应器和另外两个已经设计和建造的紫外光反应器被用来检验这些过程。在该项目的下一阶段，优化的光化学工艺将与生物工艺相结合，使用活性污泥作为前处理、后处理或两者兼而有之。这项研究将提供有关如何最好地将光化学和生物过程结合起来处理实际废水的信息。为了优化这些工艺，分析了总成本、降解率、在每个反应器中的停留时间、总体效率、协同效应以及母体和中间副产物的浓度。最后，为了最大限度地减少组合过程的停留时间和总成本，开发了一种优化算法，并使用实验数据进行了验证。

This proposal deals with modeling, optimization, and development of combined advanced oxidation technologies (AOTs) and biological processes for the treatment of multicomponent wastewaters such as municipal, slaughterhouse, petrochemical, and soluble polymeric wastewater. To date, there is a lack of information on the efficient treatment of actual wastewaters using cost effective integrated processes. Due to the limitations of individual chemical, physical or biological processes in their effectiveness or economical feasibility, almost none is sufficiently applicable on its own. Although the main advantages of AOTs are their destructive and nonselective nature as well as their high reaction rates, the treatment imposes high operating and capital costs. An alternative treatment is the biodegradability enhancement of wastewater by a photochemical pre-treatment. The development, optimization, engineering models, dynamics, synergetic effects, and eventually the design of combined processes for the treatment of actual wastewaters are the main objectives of this research proposal. In the first phase of this project, the hybrid and combined AOTs such as UV/ultrasound, UV/hydrogen peroxide, and UV/ultrasound/hydrogen peroxide are optimized in terms of economics, contact times, overall efficiency, synergetic effect, operating parameters, and the sequence of the processes. A pilot plant sonophotoreactor along with two other UV photoreactors, already designed and constructed, are used to examine these processes. In the next phase of this project, the optimized photochemical processes are integrated with the biological process using activated sludge as either pretreatment, post-treatment, or both. This research will provide information on how best to combine photochemical and biological processes for the treatment of an actual wastewater. To optimize these processes, the total cost, degradation rates, residence time in each reactor, overall efficiency, synergetic effects, and the concentrations of the parent and intermediate by-products are analyzed. Finally, to minimize the retention time and the total cost of combined processes, an optimization algorithm is developed and validated using experimental data.