Rotary-type bioreactor

Abstract

The invention discloses a rotary-type bioreactor, comprising a reaction tank, wherein bacterium solution is filled in the reaction tank; a first water inlet and a first water outlet are formed at the left end of the reaction tank; a second water outlet is formed at the right end of the reaction tank; a drum is arranged in the reaction tank; the drum sinks in the bacterium solution, and the interior of the drum is hollow; a hole is formed on the drum, and the aperture of the hole is less than the aperture of a reaction material; and a backflow tube is arranged in the drum; and a hole is formed on the backflow tube. Via the mode aforementioned, the rotary-type bioreactor adopting the scheme has the advantages of being less in pollution, temperate in working condition, short in flow, low in cost, less in investment and the like, and has the characteristic of being wide in mineral applicability in case of being applied to mining metallurgical engineering; oxygen is provided for the bacterium solution via the rotation of the drum so as to directly culture the bacterium solution, and the operation is convenient and fast; the rotary-type reactor performs reaction by means of injecting the bacterium solution, thus avoiding the damages of a shearing force in the normally-used stirring mode on the cells of bacteria, and contributing to the survival of the bacteria; and the reaction of the rotary-type reactor during a rotation process is uniform.

Description

technical field [0001] The invention relates to the technical field of processing waste circuit boards, in particular to a rotary bioreactor for key reactions with microorganisms. Background technique [0002] At present, the methods used to process old circuit boards (referred to as PCB) are divided into the following categories: pyrometallurgy, hydrometallurgy, mechanical sorting treatment, or a combination of the above methods. Pyrometallurgy and hydrometallurgy are mainly used for the recovery of precious metals such as gold and silver. The process is simple, but the cost is high and the secondary pollution is serious. The premise of the mechanical separation treatment method is that the separated substance must be dissociated from the monomer, and the method to achieve the dissociation of the monomer is usually broken. In the waste printed circuit board, the metal and non-metal are combined by coating and other processes. Yes, metal and non-metal monomers can be dissoc...

AI Technical Summary

Problems solved by technology

However, the various metals are combined by alloy, coating or welding, and it is difficult to dissociate the metal monomer by mechanical crushing. Therefore, the mechanical sorting method can only be used as an auxiliary means together with other methods.

The above-mentioned several old circuit board treatment methods are highly destructive, and the process flow is complicated, resulting in high investment costs and limited scope of use.

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