Research On Sectional Optimality For Single-tank And Model Of Energy

It is one of effective approaches to develop simple high-efficient municipal wastewater treatment techniques to accelerate development of municipal wastewater treatment Plants of China. But the simpleness isn't equivalency with roughness, it is optimal integration of time space and energy configuration. Based on experience summarization of research and practice on simple wastewater treatment technique for a long time, by analysis of spatial relationship of several continuous removal phosphorus and denitrification process, combination with new theory on removal phosphorus and denitrification, a kind of new simple wastewater treatment technique called single-tank division is brought forward in paper. In single-tank, the cycle reactor is used for basic form of single-tank, the division of single-tank is not only independence but also relation each other, it is constructed into multilevel cycle reactors in series. It is achieved that all hydraulic return flow automatically in single-tank by hydraulic condition of cycle reactor. There were characteristics of several process on space sequence influent and return flow modality and so on in single-tank, and it is advantage integration of several process.Three parameters which was operated and controlled easily was selected in single-tank: influent ratio of anoxic area HRT. The optimal capability of single-tank was experimented by actual low- concentration municipal wastewater, the optimal control parameters for the single-tank are that equals to 10d, the influent ratio of anoxic area equals to 0.8, and HRT of aerobic area equals to 12h. For removal phosphorus and denitrification as low-concentration influent condition, these parameters have direction meaning for actual project.As different influent substrate concentration, influence of DO is not obvious for rate of substrate utilization, but there was a level discrepancy of maximum specific rate of substrate utilization in Monod equation. By the theory of energy metabolism to analysis, certainly, we realize that it is constant, but because of the energy limit of metabolism, energy metabolism become to limiting factor for metabolism process, so it is uncertain that kinetics parameter in Monod equation. The view offers an approach to optimize system parameter and energy configuration of aeration. On the basis of our research, the basic equation of activated sludge growth is brought into conversation of energy in metabolism, and the relationship is built between mass and energy, finally, it is constructed that energy metabolism kinetics equation. By experimentation, it is measuredthat parameters in equation. The equation constructed as follows:Relationship is built between parameters of energy and system in energy metabolism kinetics equation in micro-field. According to actual wastewater quality, by energy metabolism kinetics equation, it can be optimized that parameters of system, sequentially, it can be optimized that treatment process and energy configuration. So it is significant that energy metabolism kinetics equation on theory and practice.Energy adjustment model can be used to explain the influence of energy for maximum specific rate of substrate utilization as energy become to limiting factor. It was built that relevant activated sludge system model by brought energy adjustment model into conservation of mass of system under stability condition in paper. The model can be used to optimize design. The activated sludge system model as follows:It is offered that testing method on saturation energy constant of energy adjustment model in this paper, and the parameters was gained by experimentation under actual wastewater quality condition, the parameters as follow:We consider that it is basis that energy metabolism kinetics equation and energy adjustment model to optimize whole activate sludge system, and it is significant.