Sewage Treatment Line Monitoring System And Key Equipment

Integrated oxidation ditch can integrate functions such as aeration deposition, separating mud and water, and polluted mud circumfluence without a separate second-depositing ditch. It is more advanced and it needs less area requirement. But the major chemicophysical method, which is used to treat sewage in most of integrated oxidation ditch currently, is turning-rinse aeration. The obvious disadvantage of the method is high-energy requirement. At the same time, since the automatic control of the whole system is not realized, manual work instead, the maintenance for the system is very complicated and inefficient. Moreover, it cannot be avoided that the index of the water quantity is unstable.This thesis has discussed the work flow and design method of biology processing system of integrated oxidation ditch with activated sludge method as kernel technology, and proposed a new aeration method——micropore areation, to reconstruct original technique system. we can greatly improve aeration efficiency and save energy. Furthermore, we designed the second generation Micropore aeration equipment which is made up for the defaults of the pre-Micropore aeration equipment.We construct the whole control system for the integrated oxidation ditch by using the model of sewage treatment DSC, which is based on CAN bus. We have made a detailed explanation for the structures and functions of different parts of the system respectively. Introduce of the CAN bus is included too.This thesis also explain how to buid up the whole automatic control system of sewage treatment which is based on the hardware of the corporation of YanHua and how to debug these hardware. At last I mainly dicussed how to develop the communication and control program with the DLL provided by YanHua and the protocol of DeviceNet.