Biotransformation of wastewater production of bakery yeast with biogas generation
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Дата
2022
Науковий керівник
Назва журналу
Номер ISSN
Назва тому
Видавець
КПІ ім. Ігоря Сікорського; ТОВ «Українська водна спілка»
Анотація
Baking yeast enterprises are a source of environmental pollution by concentrated wastewater. They
are usually diluted with water and discharged into sewerage. It is rational to use methane
fermentation, which will ensure the removal of pollutants and make the process cost-effective
through the use of biogas and digestion. Therefore, it is relevant to study the question of the
influence of fermentation parameters on the cleaning efficiency.
The aim of the work is to study the methane fermentation of yeast production effluents in a
continuous mode. Objectives: analysis of solving the problem of wastewater treatment of yeast
plants, study of the influence of process parameters (dilution rate, addition of cobalt salts) on the
efficiency of treatment; gas generation; vitamin production.
Initial COD of effluents 4500 mg O2/dm3
, pH 6. Cultivation regime – continuous, dilution rate
4,1-10–3, 6,2-10–3, 8,2-10–3, 12,4-10–3 hours–1. Cleaning efficiency 78,9 %. High values of dilution
rate cause overload of activated sludge, which leads to reduced cleaning efficiency. The presence of
cobalt also has a depressant effect. A significant amount of biogas (up to 5,2 dm3
/dm3
) is produced
with a high content of methane (up to 85 %), which is an alternative fuel. As the dilution rate
increases, the biogas and methane content decrease. With increasing dilution rate from 4,1-10–3 to
12,4-10–3 hours–1, biogas decreased from 1,11 to 0,94 dm3
/g CODloading, and from 1,43 to 1,39
dm3
/g CODfermentation. Similarly to the effect on the depth of purification, the inhibitory effect of
cobalt on methanogeneration is observed. Digestion is a valuable fertilizer with a significant
content of cobalamin vitamins (up to 95 сg/g). The addition of cobalt salts stimulates the synthesis
of vitamins, providing an increase of 26,7 to 51,6 %, improving the ratio between active and
inactive forms.
Опис
Ключові слова
biogas, vitamins, digestion, yeast production, methane fermentation, wastewater, біогаз, вітаміни, дигестат, дріжджове виробництво, метанова ферментація, стічні води
Бібліографічний опис
Bublienko, N. Biotransformation of wastewater production of bakery yeast with biogas generation / N. Bublienko, R. Zakharova, N. Stetsenko // Вода і водоочисні технології. Науково-технічні вісті. – 2022. – № 1(32). – С. 16-22.