Keywords Boron-doped diamond · Cheese whey wastewater · Dimensionally stable anode · Electrochemical oxidation · Electrocoagulation · Photoelectro-Fenton * Ignasi Sirés email@example.com Extended author information available on the last page of the article Vol.:(0123456789) 1 3 1308 Journal of Applied Electrochemistry (2018) 48:1307–1319 Simultaneously, the cathode generates H bubbles and 1 Introduction OH anions. This leads to the formation of active coagu- lants such as insoluble metal hydroxides by reactions (3) and The dairy industry, as is typical in the agri-food sector, requires (4). Flocs are formed, being aggregated in particles of large large volumes of water. Studies on the water footprint of ani- surface area that remain as a gelatinous suspension able to mal products estimate that up to 1000 L of H O are necessary remove pollutants by coagulation, whereas H gas promotes to produce 1 L of milk . As a result, this sector generates flotation of the aggregates. huge amount of wastewater, around 0.2–10 L per liter of pro- cessed milk . Dairy wastewater is characterized by high 2+ + 4Fe + 10H O + O → 4Fe(OH) + 8H organic matter content, hardly biodegradable and with ten- (3) (aq) 2 2(g) 3(s) dency to form colloidal suspensions , which can damage the
Journal of Applied Electrochemistry – Springer Journals
Published: Jun 2, 2018
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