Methods of Production of Bio Mass

The cynetic of biooxidation of minerals and concentrates depends on the density of bacterial biomass in the pulp or in the body of the mineral.

In tests effectuated in laboratories the formation of a layer in the interior of the reactor of biooxidation was observed, this layer increased the velocity of the oxidation considerably. Upon examining this formation it was established that it was mentioning a high concentration of bacteria movie within the Jorosite of porous matrix (Mfe3(SO4)2(OH)6, where M =NH+4, K+, Na+).

Four systems of production of bacterial biomass were investigated. The diagrams of flux are similar for each system, which uses a consistent chemical reductor of rubbish of iron with the purpose of simulating the lixiviation of the mineral and one unit of bacterial oxidation. The temperature of the sollution was mantained in 35°C by heaters of inmersion situated in the tank of retaining of bacterias or in a small tank through which the sollution of feeding passes before entering to the tank of retaining. Brief details of each unit will be given immediately.

Lamina System & Spray
The support for the pellicle of bacteria consists in multiple sheets of vertical Perspex, located in a container in the shape of a square. Each sheet is of 1.9 m. x 0.6 m. x 3mm. with a space of 20mm. between each sheet. The total area  of the plaques, including both sides, is of 96 m2 in a volume of 0.77 m3.

The sollution is sprinkled on both sides of each sheet, thus proportioning a thin pellicle of sollution over the sheets. The flux of circulation is of 26 l/min. The aeration is performed by natural difusion of the air through the pellicle of the liquid.

A fresh ferrous solution is pumped into the solution of recirculation, the volume of the solution is conserved constant through the tube of overflow of the tank.