A process for capturing carbon dioxide (CO.sub.2) emissions and converting the CO.sub.2 into other products is disclosed herein. The process includes capturing CO.sub.2 emissions from an exhaust mechanism at a CO.sub.2 capture device. The process also includes converting the CO.sub.2 emissions into a carbon-based product using catalysis, such as an electrochemical process or a photocatalytic process.

A method and a kit for cell culture clarification, as well as a system or apparatus for clarifying a cell culture and purifying biomolecules of interest, are described. The cell culture comprises at least one biomolecule of interest. The method comprises adding one or more compounds to the cell culture that allow the formation of floccules of solutes and/or particulates in said cell culture harvest, adding an amount of diatomaceous earth (DE) to said cell culture harvest, agitating the obtained solution, and transferring said solution to a filtration vessel comprising a support filter having a surface, whereby the diatomaceous earth in said solution forms a layer on said surface and filtering said harvest solution through said layer and support filter.