How small can photobioreacters/separators get?

Just wondering how small can they be alongside the equipment necessary for the separation of the oil and biomass for oil and flour production so as for a compact bioreactor and separator to be made for the kitchen.Im doing research for a group Ive joined that deals with sustainable food production/self sufficiency and was wondering could the technology to produce algea and separate them into the two separate componants for use in personal use in the kitchen or in the house ie a room separate from the kitchen ie conservatory that would be used to produce it and turn it into its various food condiments ie plant based milk,flour and is it difficult or easy to produce these condiments