What are the influencing factors of flat ceramic membrane in treating oily wastewater?

The treatment effect of membrane separation technology on oily wastewater will be affected to some extent by several factors, including membrane flux, temperature, aeration ratle, etc. For example, it is known that the higher the temperature, the slower the membrane fouling rate, and the smaller the change in transmembrane pressure difference, which is beneficial for the stability of membrane flux. Through experimental research, it was found that a water temperature of 50 ℃ is close to the starting temperature of the raw water sample, and 50 ℃ is set as the optimal operating temperature for the experiment. Due to the use of a completely new device in this experiment, the impact of aeration rate on the experimental results is unknown. Therefore, the main focus of the study is on the effect of aeration rate on the treatment of oily wastewater by flat ceramic membrane. The experiment mainly focuses on studying the changes in transmembrane pressure difference. Using oily wastewater as the feed liquid for filtration experiments, the changes in transmembrane pressure difference were observed under different operating conditions, and the influence of aeration rate on the stability and filtration effect of the flat ceramic membrane filtration test device was analyzed. Therefore, the most suitable aeration rate for the operation of the test device was selected.

Using flat ceramic membrane to treat oil production wastewater, the SS and oil content in the effluent are both less than 1mg/L, and the effluent quality is better than the Al level standard for oilfield reinjection water quality. The optimal conditions for treating oily wastewater using flat ceramic membrane are: optimal aeration rate of 2.0mL/min; The optimal membrane flux is 22.5L/(m2.h), and the operating temperature is 50 ℃. The optimal baffle position is the 2nd baffle. The above experiments and results indicate that the use of flat ceramic membrane to treat oily wastewater can achieve long-term stable operation, and the effluent can fully meet relevant standards. It can be used for the effective long-term operation of low utilization ceramic flat membrane treatment of oily wastewater, and the effluent can be used for the reinjection of low-permeability permeable layers, with good development prospects.