Name： Complete solutions of oilfield wastewater
Oilfield mainly includes oilfield produced water, drilling wastewater and other types of oily wastewater in the station. There are many kinds of treatment ways because of oilfield production, environment and other factors. When the oilfield needs water injection, the oilfield wastewater will reinject into stratum after treatment, and at this time, suspended solids, oil and other indexes in water must be strictly controlled to avoid damage to the stratum. If the oily wastewater supply water for steam generator or bioler, the ion content of calcium, magnesium that easy to scaling, total degree of mineralization and oil content in water must be strictly controlled. When the wastewater has to be discharged after treatment, the wastewater needs to reach local emission standards.
According to the sources, elements and outlet requirements of oilfield wastewater, there are four kinds of treatment methods, including physical method (such as centrifugal separation method, coarse graining method, membrane separation method), chemical method(acidification method, chemical oxidation method, photochemical catalytic oxidation method), physical chemical method (such as flotation method, adsorption method, magnetic adsorption separation method) and biochemical method(such as activated sludge process, biological membrane process, etc. that belong to microbial treatment method). General oilfield wastewater treatment adopts the method of combining a variety of ways, common primary treatment includes gravitational separation, flotation and centrifugal separation, which mainly used to remove floating oil and oil wet solids; secondary treatment contains filtration, coarse graining, chemical treatment, etc. which mainly used for demulsification and removing dispersed oil; deep treatment contains ultrafiltration, activated carbon adsorption, biochemical treatment, etc. which used to remove soluble oil。
According to different oilfield, different water quality and different effluent requirements, BODA develops complete sets of oil field wastewater solutions, except the main body of obligate microorganisms "beijiaqing", also including representative oilfield reinjection water process, outer drainage process, oil boiler water reuse process and so on by combining screen and effective compatibility of special microorganism, choice of membrane bioreactor and advanced oxidation.
Intensified treatment technology advantages of the obligate microorganism “beijiaqing”:
Simple technological process, strong impact resistance of system, long-term stable effluent water quality.
Strong bioactivity, short commission period, generally, it only needs 7 to 10 days.
no chemical agents, the effluent after treatment without modification, good compatibleness with the stratum, ensure long-term stability of water injection pressure
Low sludge production basically meets the environmental protection requirements, and it only needs drying treatment.
The system has simple operation, high systematic degree, and low labour intensity.
Safe, environmental protection, no secondary pollution
Nearly one hundred industrial applications located in PetroChina, Sinopec, CNOOC, Yanchang Oilfield have been done and have received great praise from all the users, such as the oilfield of Xinjiang, Daqing, Changqing, Yanchang, Huabei, Jiangsu, Zhongyuan, Jilin and so on.