Excerpts: This publication is an attempt to bring together in a rather informal manner, published information relative to citrus cannery waste utilization. The use of the waste as a feed has been given considerable space, not only because here, perhaps, is the greatest potential market, but also because published information pertaining to the use of the waste as a feed is widely scattered through the literature. The historical aspect has in some cases been given in some detail, for it is believed that it may prove to be useful background material for those desiring to make a further evaluation of the problem. From 55 to 60% of bulk citrus fruits remain as peel, rag and seeds after processing for juice, concentrates, sections, etc. This waste probably amounts at present to 2.5 million tons annually in the citrus processing regions of the United States. Besides this solid waste, there are over 4 billion gallons of liquid effluents varying in B.O.D. from about 100 to 65,000 p.p.m. These liquid effluents consist of wash water from processing plants, cooling water, floor drippings, exhaust box overflow, press juice, etc. As processing increases, these wastes will increase. Means must be found to either utilize them for the profit of the farmer and processor, or to dispose of them so that they will not constitute a public health nuisance. Much has already been done in utilizing this waste, but considerable remains to be accomplished.