Polyaluminum chloride treatment method in drilling waste slurry

Polyaluminum Chloride(PAC) for drilling mud waste treatment. As the petroleum industry continues to develop, pollutants generated during the production process enter the environment through various channels. In particular, most of the mud pits containing drilling waste are distributed near farmland. With the overflow of rainwater, it will bring greater harm to the agricultural production in the area. Hazards, therefore the disposal of discarded drilling mud is also particularly important.

General drilling mud wastewater treatment process:

Raw sewage → screen → coagulation → sedimentation → filtration and adsorption → treated water

The raw sewage is first pretreated through the screen to intercept part of the suspended solids, and then enters the coagulation equipment, which uses the coagulation method to form flocs. After sedimentation, the flocs form sludge accumulation. At this time, the effluent contains a small amount of suspended solids and For dissolved organic matter, first use quartz sand to filter the suspended matter, and then use activated carbon to remove the dissolved organic matter in the water.

In the process of drilling mud wastewater treatment, adding Polymeric Aluminium Chloride(PAC) to remove suspended solids in the water is one of the most commonly used methods. Polyaluminum chloride has a wide range of applications, is easy to quickly form alum flowers, has good deposition properties, is suitable for a wide range of pH values, and is less corrosive to equipment. It can produce good coagulation when used with polyacrylamide (polyaluminum chloride dosage 4mL/ 100mL, polyacrylamide dosage 0.3mL/100mL).