Performance evaluation of the electrolysis process for waste sludge stabilization in decentralization practices

Use of Electro-Chemical Process for Waste Sludge Generated from Moving Bed Bioreactor

“…Sludge handling, treatment and disposal are complex, owing to the offensive constituents present, which vary with the source of waste-water and the treatment processes applied [19]. The aerobic digestion system however, challenges with the drawbacks of high operating cost, energy consumption and high digestion period.…”

“…Therefore, it is significant to overcome the drawbacks by reducing digestion time and increasing the efficiency. Over the years Electro-oxidation or electro-destruction has been used for degradation of organics at high-voltage electrical currents [19]. The high voltage currents facilitates the formation of hydroxyl radicals though water splitting.…”

“…The gap between two electrodes is kept 30 mm to reduce the voltage. The electrode area of anode and cathode are 600 mm 2 [19].…”

“…5 [19]. The electrochemical process cannot be used as stand-alone solution due to the operating and capital cost for sludge digestion, unless its applied for sludge pretreatment [19].…”

“…The SCOD was analyzed by the open reflux method .The particle size was determined by laser diffraction method (Malvern Master size 2000,UK) [19]. Carrier media is essential for bacterial attachment and growth and would require roughness and porosity on the surface.…”