Performance of modified anaerobic inclining-baffled reactor treating recycled paper mill effluent: effects of influent chemical oxygen demand concentration and hydraulic retention time. Issue 12 (18th June 2018)

• Record Type: Journal Article
• Authors: Zwain, Haider M.; Aziz, Hamidi Abdul; Dahlan, Irvan
• Is Part Of: Environmental technology. Volume 39:Issue 12(2018)
• Page Start: 1557
• Page End: 1565
• Publication Date: 2018-06-18
• Subjects: Anaerobic degradation -- recycled paper mill effluent (RPME) -- modified anaerobic inclining-baffled reactor (MAI-BR) -- process studies -- biogas; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2017.1332692
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: The performance of modified anaerobic inclining-baffled reactor (MAI-BR) treating recycled paper mill effluent (RPME) was investigated by varying the influent chemical oxygen demand (CODin ) concentration from 1000 to 4000 mg/L, and the hydraulic retention time (HRT) from 3 to 1 day, corresponding to an organic loading rate increase from 0.33 to 4 g COD/L day. Throughout 126 days of operation, a maximum removal efficiency of up to 96% of chemical oxygen demand (COD) and 99% of biological oxygen demand, methane (CH4 ) yield of 0.259 L CH4 /g COD, and a stable effluent pH of 6.5 were achieved. Furthermore, the compartmental performance showed that most of the organic substrates were removed in the initial two compartments, resulting in low pH and alkalinity levels and a high concentration of volatile fatty acids. Overall, the results showed that the MAI-BR successfully treated RPME, and the performance was affected by the variation of HRT more than the CODin .