Morozov N., Ganiev I. Techology of biological treatment of industrial waste water from used lubricating (motor) oils // Principy èkologii. 2021. № 2. P. 67‒78. DOI: 10.15393/j1.art.2021.11802


Issue № 2

Original research

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Techology of biological treatment of industrial waste water from used lubricating (motor) oils

Morozov
   Nikolay Vasilyevich
Doctor of Biological Sciences, Professor, Kazan National Research Technological University, morozov_nv@mail.ru
Ganiev
   Ilnur Mahmutovich
Ph. D., Kazan (Volga region) Federal University, ilnurgm-vgora@mail.ru
Keywords:
used motor oils
biodegradation
hydrocarbon-oxidizing microorganisms
consortium
spray-deficient bioreactor
biotechnology scheme
Summary: For the treatment of industrial wastewater contaminated with semi-synthetic (Shell Helix HX7 Diesel 10W-40) and mineral (I-40A, solar) oils, a column-type spray-resistant bioreactor (SRB) with three equal zones was designed and developed: 1–2 – zones of spraying, immobilization of hydrocarbon-oxidizing microorganisms (HOM) and intensive biodestruction of contaminants; 3 – zone of sedimentation and partial biooxidation of residual contaminants. Using SRB as the main apparatus developed biotechnology scheme of treatment with the following facilities: receiver clarifier waste liquid, medium-mixer, bioreactor, secondary settling tank, dispensers HOM, biogenic elements and inducing compounds, wastewater pump, pumping treated water into the medium-mixer, and the biomass of microorganisms in the dispenser. It was found that in the mode of continuous stage wastewater with used lubricants 25, 50, 75, 100 and 200 mg/dm3 in the SRB at a rate of 0.7–0.8 dm3/min (at a flow pressure up to 3.0 atm.), providing a medium temperature of 19 to 26 ºC, pH – from 6.0 to 8.0, the initial content of dissolved oxygen 1.5–3.0 mg/dm3, nutrients within 20–50 mg/dm3, inducing substances up to 35×106 M, HOM from 101×106 to 106×106 kl/dm3 and achieved purification at 92.0–98.6 % (depending on the type of contamination). The remaining amount of oils in the treated effluent is stacked in the norm of water recycling and diversion to open water sources without damaging their ecological condition.

© Petrozavodsk State University

Received on: 22 April 2021
Published on: 09 July 2022

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