| 摘要 |
FIELD: waste water purification. SUBSTANCE: invention relates to cleaning waste water to remove solid and liquid dispersed substances by agency of coagulants, in particular, to developing method for cleaning waste water from metal-working and wood-working factories, food industry enterprises, and also for treatment of natural water in the drinking water treating systems. As coagulants, interaction products of natural bischofite and metal aluminium at weight ratio 1:(0.001-0.01) are used in amount 0.4-40 ml/l, or natural bischofite, hydrochloric acid, and metal aluminium at weight ratio 1: (0.02- 0.33): (0.08-0.9) in amount 0.2-30 ml/l. Purification degree in respect to chemical oxygen demand is 97.5%, in respect to petroleum derivatives 96.9%, and in respect to suspension material 99.4%. EFFECT: reduced consumption of coagulants (2-6 times on conversion to aluminium) and widened pH range for efficient operation of coagulants. 6 tbl |
