Investigation of output and properties of sediment in installations for production of aquaculture products

Abstract

On the territory of Ukraine, surface waters do not always meet the norms for quality indicators that must be observed when breeding fish. This is due to their contamination by sewage effluent of cities and livestock complexes. In such a situation it is expedient to use closed water supply plants for the production of aquaculture products. In order to ensure the production of biogas at methane fermentation of organic constituents of sediments, which is formed when functioning of closed water supply plants, it is expedient to equip the water purification system with a biogas plant. Such refinement will allow providing partial energy autonomy of closed water supply plants for the production of aquaculture at the expense of heat and electricity generated by the biogas cogeneration. The purpose of the study was to determine the yield and properties of sediment in the production of aquaculture products.
It has been established that the specific yield of dry mass of sediment in closed water supply plants is from 0.027 when n sturgeon is grown to 0.044 g sediment / kg of fish during growing of a bester. The conversion of the specific yield of sediment to the humidity optimal for biogas fermentation has shown that the specific yield of sediment thus increases 10 times. It should be noted that the specific yield of sediment depends not only on the type of fish grown, but also on the intensity of feeding fish. The obtained data will be useful for calculation of volumes of biogas reactor for sediment digestion for the purpose of obtaining heat and electricity for internal needs of closed water supply plants.