Abstract:

In general，the results of treating high residue drilling wastewater by coagulation are dissatisfactory. Based on the experiments，this paper sums up the relationship between the doses of coagulants and the total residues in drilling wastewater，and presents the ways to improve the results of treating high residue drilling wastewater: dilution method and grading coagulation method.

Key words: Drilling wastewater, Pollution, Treatment by coagulation method