Vandré Barbosa Brião

Effluent generation by the dairy industry: preventive attitudes and opportunities

Work aimed to identify the effluent is generating areas in a dairy company for purpose of changing concept pollution prevention. methodology consisted measuring volumes and collecting samples effluents production sectors. analysis was conducted by sector, order those which generated excessive amounts effluents. results show that dry products (powdered milk powdered whey) are greatest generators BOD, nitrogen phosphorus, while fluid form (UHT milk, formulated UHT, pasteurized cream) butter produced large quantities oils grease. solids recovery, waste segregation water reuse can be applied with saving potential as much R

Pore blocking mechanism for the recovery of milk solids from dairy wastewater by ultrafiltration

28,000 (

Ultrafiltração como processo de tratamento para o reúso de efluentes de laticínios

11,200) per month only raw materials also environmental gains in pollution prevention.

Otimização de sistema de autoaspiração de ar tipo Venturi para tratamento de água ferruginosa

Abstract - This paper evaluates the pore blocking mechanism of two ultrafiltration membranes with different geometries (tubular and spiral wound) when dairy wash water is filtered. The work evaluated the effect of transmembrane pressure and the cross-flow velocity with a 3 2 experimental design using classical Hermia’s models and the resistance-in-series model. The resistance-in-series analysis identified external fouling on the surface of both membranes, but the tubular membrane showed higher reversible fouling, while the reversible and irreversible resistances of the spiral wound membrane averaged 41% and 45%, respectively. Cake formation is the model that best represents ultrafiltration in the spiral wound membrane at all transmembrane pressures and cross-flow velocities. In the tubular membrane, at the lowest cross-flow velocity (0.79 m.s -1 ), the cake formation model fitted the experimental data best. However, at higher cross-flow velocities (1.42 and 2.23 m.s -1 ), the best fit of flux data was obtained with the complete pore blocking model. In addition, the tubular membrane apparently had a two-step pore blocking: “pore blocking” as the initial governing mechanism followed by “cake formation”.

Increase in the carbohydrate content of the microalgae Spirulina in culture by nutrient starvation and the addition of residues of whey protein concentrate

The work aimed to test two different pore size ultrafiltration membranes (a spiral wound PES membrane, cut off 5-8 kDa; and another, a tubular PVDF membrane, cut off 30-80 kDa) to nutrients recovery from dairy effluents, looking up to evaluate the flux behavior and the pollution control parameters removal. The results have shown that COD removal is nearby 75%; however, proteins separation is near 97% and fats removal is in a range 91% - 93%. The fluxes were 18 kg m-1 h-1 for spiral wound membrane and 50 kg m-2 h-1 for tubular membrane. The process has shown latter studies could became possible the both nutrients reuse on dairy products.

Reverse osmosis for desalination of water from the Guarani Aquifer System to produce drinking water in southern Brazil

In this study the response surface methodology was used to optimize the effect of Reynolds number, flocculation time and sodium hypochlorite concentration on the iron oxidation/flocculation present in groundwaters in an aeration system with air auto-aspiration. This system was composed of a recipient type Venturi coupled to a mixture tube to promote the oxygenation of the water through the suction of the atmospheric air. The hydrodynamic mapping allowed the verification of the operation conditions in which the system presented the best air suction efficiency and energy consumption, and the comparison of the best field conditions. The observed results demonstrated that it was possible to remove 98.7% of present iron (residual iron of 0.06 mg L-1) when the system operated with Reynolds number of 5.39 x 104, sodium hypochlorite concentrations of 38.4 mg L-1 and flocculation time of 30 min. The response surface methodology was satisfactory and allowed for the optimization of the mentioned operational variables.