Work

Wastewater electrolysis part 2 – Pilot reactor study for resource efficient applications in metal industry

Year: 2025

Type: article

Abstract: Electrochemical precipitation with rotating electrodes is investigated by a two-chamber pilot reactor. While deposits from disk surface of rotating electrodes are commonly removed by wipes this pilot reactor comprises of cathodic disks with newly developed composite materials for mitigation of deposits. The cathodic and anodic chamber were used for precipitation and neutralization reactions, respectively. Original wastewater samples with a total volume of 25 m 3 were treated to remove the heavy metals Mn 2+ , Ni 2+ , Zn 2+ as hydroxides below 0.5 mgMe 2+ /L. The coupling of precipitation and neutralization with same wastewater in one system was demonstrated without addition of chemicals such as acid, base, precipitation and flocculation chemicals thus demonstrating a resource efficient treatment option for wastewater of the metal industry. The complete removal of heavy metals was ensured by proper control of pH through adjustment of power input into the electrolysis system independently of wastewater input composition.

Source: Water Resources and Industry

DOI: 10.1016/j.wri.2025.100304

Authors: Lena Hahn, João Marcos Monteiro, Ulrich Kunz, Michael Sievers

Institution: Clausthal University of Technology

Language: English

Topic: Coagulation and Flocculation Studies

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Responsible consumption and production, Clean water and sanitation

Open Access status: gold

Estimated APC paid: $3,613