Treatment of citrus juice process wastewater with UASB and biogas production

Authors : Sevgi GÜNEŞ DURAK, Seren ACARER, Güler TÜRKOĞLU DEMİRKOL

Pages : 68-77

Doi:10.35208/ert.1232198

View : 50 | Download : 9

Publication Date : 2023-03-31

Article Type : Conference Paper

Abstract :A lab-scale up-flow anaerobic sludge blanket insert ignore into journalissuearticles values(UASB); reactor was used for biogas production from the citrus juice process wastewater insert ignore into journalissuearticles values(CPWW);. The volume of the reactor was 11.5 L. During 200 days of the reactor, the organic loading rate insert ignore into journalissuearticles values(OLR); value changed from 1.8-21.9 kgCOD./m3.d, upflow velocities insert ignore into journalissuearticles values(Vup); 0.1-5.2 m/h and hydraulic retention time insert ignore into journalissuearticles values(HRT); changed from 0.042 to 4.16 days. The reactor showed a stable performance at all organic loadings. Experimental chemical oxygen demand insert ignore into journalissuearticles values(COD); removal efficiencies were 71.5 ± 21% and 83.3 ± 16.3% for total COD insert ignore into journalissuearticles values(TCOD); and soluble COD insert ignore into journalissuearticles values(SCOD);, respectively. The acetic acid concentration changed from 135 to 650 mg/L. The temperature was kept in the range of 35.1 ± 1.4 oC, the pH in the range of 6.6 ± 0.2, and the alkalinity was controlled daily and kept in the range of 411 ± 273 CaCO3 mg/L. After anaerobic reactions, 6283 ± 3476 m3/d biogas was produced and the methane concentration in the biogas was 65.5 ± 11.5%. Depending on the methane production, the annual energy value potential that can be obtained from the existing UASB reactor is estimated as 48,768 kWh.
Keywords : Biogas, citrus juice process wastewater, COD, methane, organic loading rate, UASB reactor

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