Optimization and Performance of Moderate
Combined Alkali and Microwave
Pretreatment for Anaerobic Digestion
of Waste-Activated Sludge

Jiang, Hao; Liu, Ting; Ding, Jiangtao; Nie, Hong; Zhou, Hongjun

doi:10.15244/pjoes/76138

Cited by 12 publications

(1 citation statement)

References 15 publications

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“…MW pretreatment accelerated the hydrolysis stage, leading to enhanced biogas output. This rapid increase in gas production can be attributed to the increased solubility of organic sludge (Aylin Alagöz et al 2018;Jiang et al 2018).…”

Section: Impact Of Mw Pretreatment On Biogas Generationmentioning

confidence: 99%

Methane Production and Nutrient Recovery after Applying MW Technology in Sewage Sludge Pretreatment

ALHRAISHAWI,

Aslan,

Ozturk

2023

Preprint

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This study investigates the effect of microwave (MW) treatment on the disintegration of municipal activated sludge. Sludge samples underwent heating at a targeted temperature of 90°C for 35 minutes, with a 5-minute retention time. Soluble chemical oxygen demand (sCOD), sugars, proteins, nitrogen (N), and phosphorus (P) exhibited notable increases compared to untreated samples. Results indicate a substantial (42-45%) rise in methane production during the anaerobic digestion process of the disintegrated sludge compared to the untreated counterpart Methane production was estimated using a transference model, which showed the best fit compared to other models. Further experimentation involved testing digested sludge with excess soluble ammonium for the recovery of struvite at a 1.50/1/1 (Mg/N/P) ratio. The findings reveal that up to 90.09% and 90.43% of orthophosphate and ammonium, respectively, can be efficiently removed from the solution. Despite the increased methane output, the energy recovered was insufficient to offset the electrical energy used by the MW. Notably, the sludge filter resistance performance deteriorated significantly, increasing from 1.64×1014 m/kg for the control sludge to 3.76×1014 m/kg for the treated sludge.

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Section: Impact Of Mw Pretreatment On Biogas Generationmentioning

confidence: 99%