MBR excess sludge reduction by combination of electrocoagulation and Fenton oxidation processes

Comparison between Thermo-Alkaline and Electro-Fenton Disintegration Effect on Waste Activated Sludge Anaerobic Digestion

“…From these results, it can be concluded that EF process can achieve a best degree of disintegration in comparison to TA pretreatment. The efficiency of this process to improve sludge disintegration was also reported by Alzadeh Fard et al [31].…”

Mechanisms and Strategies of Advanced Oxidation Processes for Membrane Fouling Control in MBRs: Membrane-Foulant Removal versus Mixed-Liquor Improvement

“…153 Furthermore, similar to the EO process, organics can undergo direct electrolysis and oxidation following their adsorption on the anode, thus improving the antifouling performance of the electro-Fenton method. 154 3.3.2. Electro-Fenton Modified Membrane.…”

“…A comparative study evaluating the antifouling efficacy of electro-Fenton-Fenton, electro-Fenton, and electrocoagulation processes concluded that the electro-Fenton-Fenton process was most effective in minimizing excess sludge production, prolonging membrane cleaning cycles, and reducing membrane fouling. 154 Noteworthily, in a metal-free electro-Fenton MBR employing polyaniline-based carbon (PAC) membranes as electrodes, the activation of H 2 O 2 to •OH was achieved through active sites of graphitic and pyridinic N without the addition of a metal catalyst or Fe 2+ . 158 Through MFR, the irreversible fouling on PAC membranes was notably suppressed compared to the control membrane during 74-day operation, 158 implying that Fe 2+ addition may not be necessary in the context of an electro-Fenton reaction.…”

“…However, surpassing a specific voltage threshold led to inhibited metabolic activity of functional microorganisms, thereby resulting in a decline in wastewater treatment efficiency and effluent quality. 14,98,123,154,207 Moreover, excessive electrical voltage and current density are associated with accelerated electrode attrition, occurrence of side reactions, and increased operational costs within MBRs. 208,209 In an eMBR for electrode material and gap investigations, optimal operating conditions, i.e., employing Fe/Al for cathode and anode, an electrode gap of 1.5 cm, and a voltage of 1 V, yielded the highest membrane-fouling-reducing rate at 77%.…”

“…Furthermore, the combination of electro-Fenton and conventional Fenton processes exhibited superior antifouling performance compared to individual processes in MBRs. A comparative study evaluating the antifouling efficacy of electro-Fenton-Fenton, electro-Fenton, and electrocoagulation processes concluded that the electro-Fenton-Fenton process was most effective in minimizing excess sludge production, prolonging membrane cleaning cycles, and reducing membrane fouling . Noteworthily, in a metal-free electro-Fenton MBR employing polyaniline-based carbon (PAC) membranes as electrodes, the activation of H 2 O 2 to ·OH was achieved through active sites of graphitic and pyridinic N without the addition of a metal catalyst or Fe 2+ .…”