Research on the Treatment of Drilling Hydraulic Filtrate with Quaternary Ammonium-type Water Treatment Agent
The drilling filtrate of water-based drilling fluids is rich in various organic additives,exhibiting high coloration and salinity levels,posing challenges for treatment and significantly impacting the safety of the ecological environment.This study analyzed the characteristics of wastewater-based drilling filtrate from a certain oilfield and investigated its treatment using both homemade and commercially available quaternary ammonium salt-type water treatment agents.The effects of two dosage levels of the agents on the removal efficiency of color,total organic carbon(TOC),chemical oxygen demand(COD),and anions were examined.The results showed that at a dosage of 6 mL/L,the optimal removal rates for color,TOC,and COD were 98.01％,54.1％,and 29.9％,respectively,while the removal rates for the anions SO42-and Cl-were 40.6％and 21.9％,respectively.Zeta potential analysis indicated that the homemade water treatment agent could effectively neutralize colloids and act as an adsorbent and bridging agent due to its long-chain structure,facilitating rapid coagulation and sedimentation of pollutants.Furthermore,comparison with the performance and cost of purchased water treatment agents revealed that the synthesized water treatment agent exhibited superior treatment efficiency and demonstrated lower cost.
drilling waste hydraulic filtratequaternary ammonium salt type water treatment agentdecolourisationflocculation
万方数据
维普
