Can dissolved air flotation improve dairy effluent treatment conditions?

Expressive reductions in pollutants were achieved for treatment of dairy wastewater. The objective of this work was to optimize the conditions of dairy effluent treatment by dissolved air flotation (DAF) at the chemically assisted primary treatment level using the combined polyacrylamide (PAM) and Tanfloc coagulants.

Can polyacrylamide and tanfloc be used in dairy wastewater flotation?

Polyacrylamide and tanfloc were used in dairy wastewater flotation. Coagulant dosage and pH were statistically optimized. Optimum point was 758.3 mg L −1 of PAM with 205.4 mg L −1 of tanfloc at pH 7.6. Expressive reductions in pollutants were achieved for treatment of dairy wastewater.

Does cationic polyacrylamide flocculate Phaeodactylum tricornutum?

However, Nguyen et al., observed high flocculation efficiency of marine microalgae Phaeodactylum tricornutum with a cationic polyacrylamide flocculant (FO3801). The discrepancy in the literature suggested that a future flocculation study using one type of polymer with multiple marine species. 4. Conclusions

How effective is a DAF system?

The DAF system operation, using 24 mg Al 3+ /l, polyaluminum chloride (PAC) associated with 1.5 mg/l anionic polymer, and the full-industrial effluent pressurization at 300 kPa, accomplished rather low average removal efficiencies of 43 ± 15% suspended solids (SS) and 49 ± 8% oil and grease (O&G).

Does polyacrylamide improve coagulation performance?

Polyacrylamide (PAM) is an acrylamide-derived flocculant polymer widely used as a coagulant due to its high molecular weight, water solubility, and low cost [12, 13]. Ahmad et al. proved that the addition of PAM improved coagulation performance using aluminum polychloride (APC) in wastewater treatment.

What is dissolved air flotation (DAF)?

On the other hand, physicochemical methods, such as dissolved air flotation (DAF), have been a promising technology that has gained prominence and has been applied as a Chemically Enhanced Primary Treatment (CEPT) in countless wastewater treatment industries.