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UDC 628.336.3

Butusov M. M., Komarov A. Iu., Pisarenko S. S., Кудерна Mаксимилиан, Pollak Michael

Zero waste processing of wastewater sludge – production of biocoke

Summary

An optimal method of wastewater sludge utilization has not been found so far. An advantageous method of wastewater sludge utilization (both economically and ecologically) can be production of biocoke – material that meets the following criteria: high concentration of pure carbon (more than 15–30%); low hydrogen concentration (H/C less than 0.2); the lack of organic toxicants; high porosity (about 40%); mechanical stability; good sorption properties. Method of production – pyrolysis at 400–900 °С temperature; raw material – organic wastes of different origin (wastewater sludge, agricultural wastes, milling wastes, poultry farm wastes). Biocoke can be used for soil conditioning, reclamation of solid waste landfills, reclamation of technogenic and abandoned territories for planting, mitigation of land erosion and desertization. Compared to other soil media biocoke has an advantage in the possibility of selecting material properties depending on the specific application. AktivIl Company has designed and commissioned a medium-scale multiple-hearth
pyrolysis reactor with a capacity of approximately 300 tons of biocoke annually; sludge from a wastewater treatment plant in one of the Moscow Area cities has been used as a raw material. Biocoke samples produced at different operating modes were analyzed and tested. The first results of the studies showed the possibility of reaching the required parameters of the product. The studies are going on within the frames of some national and international projects.

Key words

wastewater , sludge , waste utilization , pyrolysis , biocoke

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REFERENCES

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