DOI 10.35776/MNP.2019.10.06
UDC 628.355

Kevbrina M. V., Akmentina A. V., Dorofeev A. G., Agarev Anton, Aseyeva V. G., KOZLOV M. N., Nikolaev Yu. A.

Advanced technology of municipal wastewater treatment
with granular sludge

Summary

Increasing the specific biochemical capacity of the facilities using the so-called granular activated sludge is one of the promising areas for the development of biological wastewater treatment technologies. Granular sludge is microbial biocenosis specializing in the decomposition and mineralization of substances present in wastewater. The main distinction from regular sludge is due to two important factors: the composition of the basic structural unit of granular sludge – granules, and a high sedimentation rate (up to 20 m/h). This provides for developing sludge doses of up to 10 g/l in bioreactors of wastewater treatment. The results of the development of the first biotechnology in Russia for municipal wastewater treatment of using granular activated sludge are presented. The technology has been implemented at the facilities of Mosvodokanal JSC. The technology of aerobic biological treatment in a sequencing batch reactor with sequential nitri-denitrification and an upward flow of wastewater provides for the quality of effluent that meets the standards for maximum permissible concentrations for discharge into fishery bodies. Technical and economic comparison of the developed technology with the technology of removing nutrients in flow-through aeration tank showed that the life cycle costs of the facilities with partially granulated activated sludge are 1.4 times less than the costs of traditional biological treatment technology (for a capacity of 1000 m³/day).

Key words

biological treatment , granulated activated sludge , municipal wastewater , nutrients removal , SBR-reactor

Скачать/download (PDF) free access

REFERENCES

1. Shotina K. V. Ochistka gorodskikh stochnykh vod ot azota i fosfora s ispol’zovaniem povyshennykh doz aktivnogo ila [Removal of nitrogen and phosphorus from municipal wastewater with the use of elevated dosages of activated sludge: Dissertation for the degree of PhD in Engineering. Moscow, 2011. 150 p.].
2. Wilderer P. A., Irvine R. L., Goronszy M. C. Sequencing batch reactor technology. Scientific and technical report No. 10. IWA Publishing, 2001.
3. Nazik Artan, Derin Orhon. Mechanism and design of sequencing batch reactors for nutrient removal. Scientific and technical report. IWA Publishing, 2005.
4. Beun J. J., van Loosdrecht M. C. M., Heijnen J. J. Aerobic Granulation. Water Science and Technology, 2000, no. 41 (4–5), pp. 41–48.
5. De Kreuk M. K., van Loosdrecht M. C. M. Selection of slow growing organisms as a means for improving aerobic granular sludge stability. Water Science and Technology, 2004, no. 49 (11–12), pp. 9–19.
6. Beun J. J., van Loosdrecht M. C. M., Heijnen J. J. N-removal in a granular sludge sequencing batch airlift reactor. Biotechnology and Bioengineering, 2001, no. 75 (1), pp. 82–92.
7. Third K. A., Burnett N., Cord-Ruwisch R. Simultaneous nitrification and denitrification using stored substrate (PHB) as the electron donor in an SBR. Biotechnology and Bioengineering, 2003, no. 83 (6), pp. 706–720.
8. Danilovich D. A. Budushchee, kotoroe uzhe nastupilo: tekhnologiia aerobnogo granulirovannogo ila [A future that has been already here: the technology of aerobic granulated sludge]. Nailuchshie Dostupnye Tekhnologii Vodosnabzheniia i Vodootvedeniia, 2017, no. 3, pp. 8–11. (In Russian).