Analysis of Bakery Sewage Treatment Process Options Based on COD Fraction Changes

• Autorzy: Struk-Sokolowska J. , Tkaczuk J.

Identyfikatory

DOI

10.12911/22998993/89653

• Języki publikacji: EN

Abstrakty

EN

Municipal WWTPs often receive industrial wastewater including the bakery sewage. The effluent of the bakery industry has a high biological oxygen demand (BOD). In addition to high BOD, this wastewater contains high chemical oxygen demand (COD), total Kjeldahl nitrogen (TKN) and is characterized by a dark color. The effect of bakery wastewater contribution on the COD fraction changes in the municipal sewage is presented in this paper. The study was conducted in July 2016 in a WWTP located in Lipsk, East-North Poland. The sewage receiver is the Biebrza River. The volume contribution of bakery wastewater is 10%. The analytical results were used to compute the percentage value contribution of individual COD fractions in wastewater. During the study, the following fractions were identified: S_S – COD of readily-biodegradable dissolved organic matter, S_I – COD of non-biodegradable dissolved organic matter, X_S – COD of slowly-biodegradable non-soluble organic matter, X_I – COD of non-biodegradable non-soluble organic matter. The method used for the COD fraction determination in wastewater was developed based on the ATV 131P guidelines (ATV-DVWK-A131P). The aim of the study was to determine the effect of bakery wastewater contribution on the COD fraction changes during the technical scale biological wastewater treatment with an activated-sludge process. The percentage contributions of individual COD fractions in wastewater were compared with the shares in the wastewater from other food industries (dairy, olive mill, tomato, sugar beet, potato processing, winery). In raw wastewater, the X_S fraction was dominant 44.2%. S_S fraction was 38.8%. In raw wastewater, the S_I, X_I fractions ranged from 2.3 to 14.8%. In the effluent the S_S fraction was not noted, which is indicative of microorganisms consumption. The WWTP effluents mostly (43.4%) contained slowly-biodegradable non-soluble organic matter (X_S). Non-biodegradable dissolved organic matter (S_I fraction) had a high share of 42.3%.

Słowa kluczowe

EN

wastewater; municipal; bakery; food industry; COD fractions; activated sludge process

• Wydawca: Polskie Towarzystwo Inżynierii Ekologicznej ; Lublin University of Technology
• Czasopismo: Journal of Ecological Engineering
• Rocznik: 2018
• Tom: Vol. 19, nr 4
• Strony: 226--235
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Struk-Sokolowska J.

• Bialystok University of Technology, Faculty of Civil and Environmental Engineering, Department of Technology and Systems in Environmental Engineering, ul. Wiejska 45E, 15-351 Bialystok, Poland

autor

Tkaczuk J.

• Bialystok University of Technology, Faculty of Civil and Environmental Engineering, Department of Technology and Systems in Environmental Engineering, ul. Wiejska 45E, 15-351 Bialystok, Poland

Bibliografia

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