METHOD FOR THE SOLID/LIQUID SEPARATION OF A SUSPENSION CONTAINING MICROALGAE

摘要

The invention relates to a method for the solid/liquid separation of suspensions containing microalgae, wherein biodegradable materials are used as a filter material. The method comprises the following steps: First, a filter layer made of organic material is introduced into a filter device. Then at least one application of the suspension to be separated to the filter layer is performed, wherein the solid constituents of the suspension are deposited on the filter layer and the liquid constituent passes through the filter layer as filtrate. The solid constituents of the suspension comprise microalgae, wherein subsequently the filter material and the microalgae are hydrolyzed by microorganisms naturally contained in the filter material or added separately. For the hydrolysis, it is important that the filter layer be kept moist in order to prevent the microalgae from drying out. In addition, valuable substances (dyes, lipids, proteins) can be extracted from the filtrate. The filtrate can also be used to produce biogas in a methane reactor. The filter material that is not biodegradable or is difficult to biodegrade can be used as organic compost. The waste liquor from the methane reactor can be used again for microalgae cultivation after decontamination.