Study On Wastewater Treatment Technology Of CY Oily Wastewater Biochemical Treatment Station

In recent years, along with the during crude oil production of oilfield sewage on the environment pollution is becoming more and more serious, and the Chinese government attaches great importance to environmental protection work in the background, which makes the treatment of oilfield wastewater has become more and more important.This thesis aims at the subordinate to the CY D oilfield oily wastewater biotreatment of wastewater treatment station of CY technology comprehensively, oily wastewater treatment station is the key environmental protection projects of D oil field, daily sewage treatment capacity of thirty thousand cubic meters, is the largest industrial wastewater D oilfield science station.The current D oilfield has entered the three phase of oil recovery, in order to improve the production efficiency, D oil co-occurrence stage most oil selection, through the three element composite system of polymer flooding technology for the exploitation of crude oil. However a lot of use makes the production output water containing polymer, a large number of complex oil technology three yuan compound drive, greatly increasing the difficulty of wastewater treatment. In addition, along with the increase of water consumption of oil flooding in D oilfield, sewage volume also increase, which increases the difficulty of wastewater treatment. Along with the national environmental protection laws and regulations system has become more and more strict, the current sewage treatment technology of oily wastewater treatment station of CY is not suitable for the needs of the current environmental protection and oil production.According to the current status of sewage in D oilfield, study deeply and effectively carry out the water quality of sewage treatment technology of high polymer bearing material is very important. This thesis is based on the actual situation of D oil field, first of all, through the Internet, library and related scientific research institutions and other channels, the collection and access to a large number of sewage treatment technology of oilfield scheme, methods and regulations data.And then through the relevant data of oilfield wastewater treatment technology at home and abroad, sums up the principles of technology and the advantages and disadvantages of. CY oily sewage biochemical sewage treatment station of the characteristics of combination of field survey, the data access technology by the related list.Finally the comprehensive features to consider CY oily wastewater treatment station status and all kinds of sewage of oilfield sewage treatment technology, so as to clear the characteristics of evaluation index system, choose the suitable evaluation methods. This paper uses AHP, optional technology of sewage treatment station of CY oily wastewater biochemical treatment analysis and optimization, to screen out the optimal wastewater treatment technology. In the hierarchical analysis method in the analysis of screening, oily wastewater treatment station to CY the current sewage treatment is most suitable for three kinds of technology set to plan layer; the realization of CY oily wastewater treatment station of the sewage discharge standards as the goal layer; the objective evaluation of three schemes of technical requirements, economic requirements, environmental requirements, policy as the requirements, establish the hierarchical model, and then constructing judgment matrix, according to each factor matrix scaling value to calculate the proportion, and finally through the priority level of total order calculate three kinds of water treatment technology, and get the evaluation result. According to the evaluation results, the final selection of wastewater treatment technology of MBBR enhanced biological treatment technology as CY oily wastewater treatment station and the success of the field test, to provide the theoretical basis for CY oily wastewater treatment station of the choice of wastewater treatment technology.