AI Article Synopsis
- Electrochemical sludge pretreatment is gaining popularity due to its eco-friendly benefits and compact design, but issues like limited electrode effectiveness and sludge conductivity have hindered its use.
- Using granular activated carbon (GAC) in a fluidized electrode electrochemical system (FEE) significantly improved the sludge treatment process, resulting in a 126% increase in soluble chemical oxygen demand (SCOD) and a 23.1% reduction in sludge volume.
- GAC enhanced the electrical conductivity of the sludge and promoted oxidation processes, improving overall sludge solubilization and making it a sustainable option for electrochemical pretreatment.
Article Abstract
Electrochemical sludge pretreatment is receiving increasing attention because of its small footprint and higher environmental compatibility. However, the limited effective area of electrode plates and the low conductivity of sludge hinder the widespread application of electrochemical pretreatment. In this study, granular activated carbon (GAC) was employed to construct a fluidized electrode electrochemical system (FEE) to promote electrochemical pretreatment. Under the optimal operating parameters, the FEE system could effectively facilitate sludge decomposition, indicated by 126% increase in soluble chemical oxygen demand (SCOD) and 23.1% reduction in sludge volume. Mechanism study revealed that the addition of GAC significantly enhanced the conductivity of sludge, thereby promoting the oxidation capacity of FEE system. Furthermore, continuously generated HO in FEE further promoted sludge solubilization. GAC offered an effectively, green and sustainable enhancement approach for sludge electrochemical pretreatment.
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| http://dx.doi.org/10.1016/j.biortech.2023.130210 | DOI Listing |
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