Effects of pretreatment in a vortex layer apparatus on the properties of confectionery wastewater and its dark fermentation

Михеева, Э. Р.; Katraeva, Inna V.; Kovalev, Andrey A.; Kovalev, Dmitriy A.; Litti, Yu. V.

doi:10.1016/j.ijhydene.2022.05.183

Cited by 11 publications

(1 citation statement)

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“…Wastewater is characterized by daily and seasonal variations in composition and quantity which adversely affect the disposal process [2]. Confectionery plants discharge about 300-500 m 3 per month of wastewater that predominantly consists of organic compounds and suspensions, such as dissolved sugars, coarse impurities, emulsified fat particles, organic colloidal and solutes, surfactants, and dyes as well as other chemical additives [5,6]. The values of chemical oxygen demand (COD) vary from 2500 to 20,025 mg O 2 /L, while biological oxygen demand (BOD 5 ) concentrations are up to 500-8000 mg O 2 /L, which allows the classification of this sewage as biodegradable [2,5,7].…”

Section: Introductionmentioning

confidence: 99%

Methane Production from Confectionery Wastewater Treated in the Anaerobic Labyrinth-Flow Bioreactor

et al. 2023

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Production and consumption of confectionery products have increased worldwide, thus, effective management of wastewater produced is now an important issue. The confectionery high-load sewage was explored for biogas production in an innovative-design anaerobic reactor with labyrinth flow. The experimental studies were focused on determining the best technological parameters of anaerobic digestion for the effective removal of pollutants and obtaining high CH4 production efficiency. It was found that organic loading rate (OLR) of 5.0–6.0 g COD/L·d contributed to the highest CH4 generation of 94.7 ± 6.1 to 97.1 ± 5.1 L CH4/d, which corresponded to a high COD removal of 75.4 ± 1.5 to 75.0 ± 0.6%. Under such conditions the FOS/TAC ratio was below 0.4, indicating reactor stability, and pH was on the level of 7.15 ± 0.04 at OLR 5.0 g COD/L·d and 7.04 ± 0.07 at OLR 6.0 g COD/L·d.

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Section: Introductionmentioning

confidence: 99%