Abstract: Russian municipal wastewater treatment plants produced more than 7 million tons of sludge, which is an organic- mineral pulp with a moisture content of 98-99%. Dry substance consists of 30-40% of mineral compounds and 60- 70% of organic substances that can contain heavy metals compounds, organic compounds such as benzopyrene, pesticides, polychlorinated biphenyls, phenols, etc. Many of the compounds possess a mutagenic activity. Currently in Russia and in Europe the bulk of sewage sludge is stored in the sludge beds and dumps, which is not fundamentally, solve the problem. This approach cannot radically solve the problem.One of the common methods of sludge utilization is thermal treatment including burning in the flare and layered furnaces or furnaces with a fluidized bed of inert material. The Pyrofluid Company (France) implemented the method of burning in the fluidized bed of inert material in St. Petersburg. Despite some advantages over other technologies, the wet sludge combusting in a fluidized bed of inert material has some disadvantages. This disadvantages includes large furnaces size; high consumption of additional fuel; increased demands on construction materials for the furnaces at 850-1100 ºС; slagging of the fluidized bed furnace and walls, as well as the need for complex flue gas cleaning system from the CO, SOx, NOx, benzpyrene and dioxins.The proposed method of catalytic thermal utilization of sewage sludge, developed at the Institute of Catalysis SB RAS allows us to solve a number of problems associated with thermal sludge treatment for other traditional technologies. The technology is based on the use of a heterogeneous deep oxidation catalyst for the fuelcombustion in a fluidized bed. Fluidized bed combustion in the presence of a catalyst essentially differs fromcombustion in a fluidized bed of inert material. The proposed technology of sludge catalytic thermal combustion can not only effectively utilize it with the achievement of high sludge combustion degrees, low values of emission concentrations (without additional cleaning systems), but also allows one to carry out the process in autothermal mode with sludge humidity up to 75%.Currently there are performed design work on the construction of sludge utilization complex with thermal capacity of 4 MW for "OmskVodokanal" JSC. It was also carried out an environmental and state expertise.

Cite: Яковлев В.А. , Дубинин Ю.В. , Федоров А.В. , Пармон В.Н.
Термокаталитическая утилизация иловых осадков сточных вод как пример энергоэффективного катализа
In compilation Возобновляемая энергетика XXI век: Энергетическая и экономическая эффективность, 2016// Материалы Международного конгресса REENCON-XXI «Возобновляемая энергетика XXI век: Энергетическая и экономическая эффективность», Сколково, 13-14 октября 2016 г. – ОИВТ РАН., 2016. – C.199-204. РИНЦ

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