Yang et al. (2024): Insights into the mechanism of sludge-based biochar in electro-dewatering and energy consumption optimization

Yahong Yang, Pengjin Ma, Yangying Li, Yirong Chen, Huining Zhang IN:
Journal of Water Process Engineering, https://doi.org/10.1016/j.jwpe.2024.106328

Sludge-based biochar (SBB) acts as an environmentally friendly physical conditioner with electrical conductivity. It has the potential to enhance the dewatering performance of EDW and reduce energy consumption. This study prepared Fe-loaded SBB at three different temperatures and treated the sludge using an EDW at a constant voltage of 30 V for 20 min under optimal conditions of 12 % g/g dry solids (DS). The results indicate that the presence of Fe ions on the SBB surface significantly enhances the electrical conductivity and Zeta potential during the EDW process, effectively neutralizing the negative charges of sludge flocs and promoting the disintegration of sludge cells.

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