Abstract
The process kinetics of an anaerobic digestion process for treating recycled paper mill effluent (RPME) was investigated. A laboratory-scale modified anaerobic hybrid baffled reactor (MAHB) was operated at hydraulic retention times of 1, 3, 5, and 7 days, and the results were analyzed for the kinetic models. A kinetic study was conducted by examining the phase kinetics of the anaerobic digestion process, which were divided into three main stages: hydrolysis kinetics, acetogenesis kinetics, and methane production kinetics. The study demonstrated that hydrolysis was the rate-limiting step. The applied Monod and Contois kinetic models showed satisfactory prediction with μmax values of 1.476 and 0.6796 L day−1, respectively.
Highlights
Academic Editors: Carmen TeodosiuThe recycled paper industry is a worldwide emergent industry that consumes a considerable amount of resources, energy, and raw materials
aerobic digestion (AD) process was investigated by the kinetics of the three phases of AD process
In the three-phase kinetics, the kinetic evaluation might be important in terms of digestion rate, bacterial varieties, environmental demands, digestion process, and digestion products for each phase involved [20]
Summary
The recycled paper industry is a worldwide emergent industry that consumes a considerable amount of resources, energy, and raw materials. Many of those involved in this industry discharge their insufficiently treated waste into streams and rivers, which contributes to serious problems in flora–fauna and aquatic life [1]. The anaerobic digestion process is one of the main biological wastewater treatment processes in use today. It became popular as a wastewater treatment option because it is energy positive (it produces methane) and it has low sludge production [2]. Anaerobic digestion is one of the most remarkable options to treat high-strength organic effluents, such as recycled paper mill effluent (RPME)
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