Affiliation:
1. NEVŞEHİR HACI BEKTAŞ VELİ ÜNİVERSİTESİ
2. İSTANBUL ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ
Abstract
A lab-scale up-flow anaerobic sludge blanket (UASB) reactor was used for biogas production from the citrus juice process wastewater (CPWW). The volume of the reactor was 11.5 L. During 200 days of the reactor, the organic loading rate (OLR) value changed from 1.8-21.9 kgCOD./m3.d, upflow velocities (Vup) 0.1-5.2 m/h and hydraulic retention time (HRT) changed from 0.042 to 4.16 days. The reactor showed a stable performance at all organic loadings. Experimental chemical oxygen demand (COD) removal efficiencies were 71.5 ± 21% and 83.3 ± 16.3% for total COD (TCOD) and soluble COD (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.
Publisher
Environmental Research and Technology
Subject
Pollution,Waste Management and Disposal,Water Science and Technology,Environmental Engineering
Reference51 articles.
1. E. Akdağ, “Turkey Fruit Juice etc. Products Industry Report”, İstanbul, 2011.
2. D. A. Zema, P. S. Calabro, A. Folino, V. Tamburino, G. Zappia, and S. M. Zimbone, “Wastewater Management in Citrus Processing Industries: An Overview of Advantages and Limits”, Water 2019, Vol. 11 (12), pp. 2481–2481, 2019.
3. S. Güneş-Durak, T. Ormancı-Acar, and N. Tüfekci, “Effect of PVP content and polymer concentration on polyetherimide (PEI) and polyacrylonitrile (PAN) based ultrafiltration membrane fabrication and characterization”, Water Science and Technology, Vol. 2017 (2), pp. 329–339, 2018.
4. H. Elif, G. Akbay, C. Akarsu, and H. Kumbur, “Treatment of fruit juice concentrate wastewater by electrocoagulation: Optimization of COD removal”, International Advanced Researches and Engineering Journal, Vol. 2 (01), pp. 53–057, 2018.
5. M. Garg, “Treatment and Recycling of Wastewater from Beverages/The Soft Drink Bottling Industry”, Springer, Singapore, pp. 333–361, 2019.