APPLICATION OF IMMOBILIZED MICROORGANISMS FOR RESTORATION OF BIOLOGICAL WASTEWATER TREATMENT

Анотація

Modern technologies for biological wastewater treatment are based on the use of microorganisms capable of biochemical decomposition of organic substances and nitrogen compounds. Activated sludge systems remain the most common, but they have several significant limitations, including the sensitivity of microbial communities to hydraulic and temperature fluctuations, instability to toxic impurities and the need for continuous energy supply. These disadvantages are especially critical for small treatment plants operating in seasonal or intermittent mode, when long shutdowns lead to loss of biological activity and the need to re-form the biocenosis after start-up, which can take from 2 to 4 weeks, requiring significant costs to provide the biological process with “fresh” activated sludge or restore the efficiency of activated sludge by long-term feeding.