Biosolids and Sludge Management

Brisolara, Kari Fitzmorris; Qi, Yinan

doi:10.2175/106143016x14696400494731

Cited by 10 publications

(1 citation statement)

References 48 publications

(46 reference statements)

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“…Among the biogas sources, bio-waste from olive mill wastewater (OMW) and activated sludge (AS) are promising resources [1][2][3]. The anaerobic co-digestion process is regarded as a promising method for reducing bio-waste accumulation [4][5][6].Furthermore, the nature of the AS and OMW compositions required a short residence time for complete degradation, which was reported to be from 16 -46 days with volatile solids (VS) removal of 32% of total solid (TS) [7].The co-digestion process of AS and OMW improves biogas production and increases the process stability [4,[8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Influence of the heavy metals concentration on the anaerobic co-digestion performance of activated sludge and Olive mill wastewater

Alrawashdeh

2021

Preprint

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The influence of heavy metals (HMs) on the anaerobic co-digestion process (AD) of activated sludge and olive mill wastewater (50% v/v) was studied. Biogas production, methane CH4 concentration, and removal efficiency of the TS, VS, and TCOD were investigated in mesophilic conditions. The toxicity and inhibitory effects of HMs at different concentrations (15–60 ppm) on the digestion process were specified.A high concentration of HMs has resulted in a significant decrease in AD performance in terms of organic load degradation, biogas production, CH4 content, TCOD removal efficiency, and inhibition of hydrogenotrophic-methanogenic bacteria. The toxicity of HMs can be arranged according to TS removal: Cu > Zn ≈ Cr > Pb, according to TCOD removal efficiency: Cu > Cr > Zn > Pb, biogas production: Cu > Zn ≈ Cr > Pb, CH4 content: Cu > Zn > Cr > Pb. Also, the results showed that the methanogenic stage was influenced negatively and more than the acetogenic stage, where Pb < 30 ppm had a lower inhibitor effect on the digestion, while the lowest concentration of Cu(II) leads to the significant inhibition of the AD process is ≥ 10 ppm. At the concentration of 60 ppm of Pb, Zn, Cr, and Cu, the COD removal efficiency was 17.07%, 15.64%, 19.13%, and 20.53% respectively, TS removal was 17.31%, 13.44%, 16.28%, and 10.37 respectively, the VS removal was 19.4%, 14.445, 7.94% and 5.17%, respectively. Also, at the concentration of 60 ppm, biogas production has decreased by 51.55%, 66.46%, 68.1%, and 73.91%, respectively.Novelty statement This study provides new data specifying the inhibitor HMs concentration and the impact of HMs at the various concentrations on the anaerobic co-digestion of active sludge and olive mill wastewater

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Section: Introductionmentioning

confidence: 99%

Influence of the heavy metals concentration on the anaerobic co-digestion performance of activated sludge and Olive mill wastewater

Alrawashdeh

2021

Preprint

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Co-digestion of sewage sludge with crude or pretreated glycerol to increase biogas production

Ferreira

Volschan

Cammarota

2018

Environ Sci Pollut Res

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Anaerobic co-digestion of sewage sludge and glycerol from the biodiesel industry was evaluated in three experimental stages. In the first step, the addition of higher proportions of crude glycerol (5-20% v/v) to the sludge was evaluated, and the results showed a marked decrease in pH and inhibition of methane production. In the second step, co-digestion of sludge with either a lower proportion (1% v/v) of crude glycerol or glycerol pretreated to remove salinity resulted in volatile acid accumulation and low methane production. The accumulation of volatile acids due to the rapid degradation of glycerol in the mixture was more detrimental to methanogenesis than the salinity of the crude glycerol. In the third step, much lower amounts of crude glycerol were added to the sludge (0.3, 0.5, 0.7% v/v), resulting in buffering of the reaction medium and higher methane production than in the control (pure sludge). The best condition for co-digestion was with the addition of 0.5% (v/v) crude glycerol to the sewage sludge, which equals 0.6 g glycerol/g volatile solids applied. Under this condition, the specific methane production (mL CH/g volatile solids applied) was 1.7 times higher than in the control.

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Anaerobic Co-digestion Mill Wastewater—Activated Sludge Effect of Aerobic Pretreatment on the Performance of OMW Anaerobic Digestion

Alrawashdeh

AlEssa

2019

Waste Biomass Valor

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Biosolids and Sludge Management

Cited by 10 publications

References 48 publications

Influence of the heavy metals concentration on the anaerobic co-digestion performance of activated sludge and Olive mill wastewater

Influence of the heavy metals concentration on the anaerobic co-digestion performance of activated sludge and Olive mill wastewater

Co-digestion of sewage sludge with crude or pretreated glycerol to increase biogas production

Anaerobic Co-digestion Mill Wastewater—Activated Sludge Effect of Aerobic Pretreatment on the Performance of OMW Anaerobic Digestion

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