... low-algae, low-temperature, low-contaminated raw water. Particularly effective for high-turbidity raw water. 7. Low dosage required, save 20 ... . In the sample test, stir at 20-30r/min for 5 min, stand for 10 min, and test turbidity. 6. Compulsive filtration: ... BOD water, particularly when co-used with other auxiliaries. 8. For users adopting chemical flocculation, no further equipment is needed saving ...