Article 2023 · 18 citations

Effect of controlled and uncontrolled pH on tannery wastewater treatment by the electrocoagulation process

Bingul, Zuleyha, Irdemez, Sahset, Demircioglu, Nuhi

Abstract

In this study, the effects of the pH of tannery wastewater obtained from a local leather processing factory on the removal of COD and turbidity, and cost of theelectrocoagulation process was investigated. Studies were carried out under two different operatingconditions. The highest COD removal efficiency was obtained as 83.5% when the initial pH was set to 3, while the energy consumption at this pH was found to be 3.88 kwh m(-3). In studies where pH was kept constant, the highest removal efficiency obtained was 83.33% at pH = 5. In this case, the energy consumption was determined as 2.44 kWh m(-3). The total cost of the system was calculated as 1.0899 $ m(-3) under controlled pH conditions and 0.8761 $ m(-3)with uncontrolled pH. Studies show that the COD removal kinetics are more suited to 2nd degree kinetics. The highest removal rate for uncontrolled pH was k(2) = 0.0791 L g(-1) min(-1) at pH = 3. The highest rate for controlled pH was k(2) = 0.0397 L g(-1) min(-1) at pH = 5.

Keywords

Electrocoagulation aluminium electrode tannery wastewater COD removal turbidity INITIAL PH REMOVAL EFFLUENT ALUMINUM WASTEWATERS OXIDATION POLLUTION INDUSTRY

WoS Categories

Chemistry, Analytical Environmental Sciences

Sustainable Development Goals

Clean Water and Sanitation

Citation

Journal: INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
Year: 2023
Volume: 103
Issue: 16
Pages: 4269-4284
ISSN: 0306-7319
eISSN: 1029-0397
DOI: 10.1080/03067319.2021.1925261
WoS UID: WOS:000651258000001

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