ALTERNATIVE PROCESS SOLUTIONS OF THE WASTEWATER SLUDGE COMPLETE UTILIZATION PROBLEM
Abstract
Under consideration is the problem of utilization of multi-tonnage waste of deposited sludge sediments of sewage. The current tendency of development of the industrial sector and urbanization of the territories contributes to the increase of water supply and creates an additional load on the objects of treatment facilities and on the environment as a result of the long-term storage of deposited sludge sediments and excessive active sludge.
The alternative technological solutions of the problem of complete utilization of sewage sludge: such as burial, storage (depositing on sludge maps), usage in various industry fields, obtaining alternative biofuels, thermal utilization of sludge, usage as fertilizer are given.
The comparative analysis of possible usage of the technology of mesophilic anaerobic digestion and biochemical processes of destruction of the organic component of domestic waste and sludge sediments of liquid effluents is substantiated.
The methodology for calculating quantitative and qualitative characteristics of formation and determination of biogas volumes during anaerobic digestion of sludge sediment is given. The traditional methods of dewatering of the sediment with the subsequent thermal utilization are analyzed.
Technological schemes of preparation of deposited sludge sediments of sewage for utilization in road construction, experimental installation of obtaining alternative biofuel from sludge sediment, balance scheme of thermoistilization of sludge sediment are considered.
The averaged results of treatment of sludge sediment mixtures are given with the definition of the most effective technologies for the complex utilization of sludge sediments in terms of technical-economic indicators.
Keywords: energy potential of methane formation, hydrolysis, mesophilic anaerobic digestion, thermal utilization, alternative biofuel
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