Aerobic Stabilization of a Mixture of Crude Sludge and Non-Compacted Activated Sludge with Sludge Water Recirculation
Abstract: The article deals with the problem of aerobic stabilization of a mixture of raw sludge and excess activated sludge. Aerobic stabilization of sewage sludge is characterized by simplicity of construction and operation of structures, characterized by the best water-releasing properties of stabilized precipitation. But the duration of stabilization increases significantly when the raw sediment of primary sedimentation tanks is mineralized in a mixture with excess activated sludge. This leads to an increase in capital and operational costs. The reasons for the increased duration of aerobic stabilization of a mixture of raw sediment and unconsolidated activated sludge are substantiated. The necessity of averaging the consumption of raw sludge before feeding it to the stabilizers is established, the necessity of observing the permissible ratio of the amount of raw sludge and activated sludge in the mixture is determined. It is proposed to use sludge water recirculation to reduce the duration of stabilization of a mixture of raw sludge and unconsolidated activated sludge. A technological scheme of aerobic stabilization with recirculation of sludge water separated from the stabilized mixture in a silt compactor has been developed. The use of denitrification after mixing recirculating sludge water with raw sediment is justified. The tasks of subsequent research to determine individual parameters of the stabilization technology are formulated.
Keywords: aerobic stabilization, crude sludge, activated sludge, duration of stabilization, Eh, rH2, recirculation, sludge water, denitrification, stabilized sludge.
Pages: 43-49.
For citation: Chernyshev, V. N.; Mogukalo, A. V.; Ruchka, V. V. Aerobic Stabilization of a Mixture of Crude Sludge and Non-Compacted Activated Sludge with Sludge Water Recirculation. – Text : electronic. – In: Proceeding of the Donbas National Academy of Civil Engineering and Architecture. – 2022. – Issue 2022-5(157) Engineering systems and technogenic safety. – Р. 43-49. – URL: https://donnasa.ru/publish_house/journals/vestnik/2022/2022-5(157)/st_06_chernishev_mogukalo_ruchka.pdf (date of access: 19.11.2024). – ISSN 2519-2817.
Issue 2022-5 (157)
Journal: Proceeding of the Donbas National Academy of Civil Engineering and Architecture
Publish house: Donbas National Academy of Civil Engineering and Architecture
Journal: Proceeding of the Donbas National Academy of Civil Engineering and Architecture
Publish house: Donbas National Academy of Civil Engineering and Architecture