Technology for processing pig effluent to create a new structuring additive for asphalt concrete

This paper presents information on a methodology for intensifying the processing of pig manure based on an anaerobic bioenergy plant to create a new product – a structuring additive for asphalt concrete. When processing fresh manure by anaerobic digestion, it is currently possible to obtain two products – organic fertilizer and biogas, as an alternative energy source. The technology we offer allows us to obtain four products – biogas fuel, effluent (disinfected and neutralized pig manure), liquid fertilizer with humic substances and a structuring additive for asphalt concrete. The expansion of the resulting products is achieved by adding the following list of equipment to the work cycle: a separator for dividing the effluent into liquid and solid fractions, an alkaline reactor and a suspension separation separator. The liquid fraction of the effluent, abundantly populated with methanogenic bacteria, is sent again to prepare for the fermentation of fresh manure, and the solid fraction is used as raw material for the production of organic fertilizer and structuring additive for asphalt concrete. Thus, the new technology will help to minimize the costs spent on the disinfection and neutralization of fresh pig manure.