Combined thermochemical and fermentative destruction of municipal biosolids: A comparison between thermal hydrolysis and wet oxidative pre-treatment

Strong, Peter James; McDonald, Ben; Gapes, Daniel J.

doi:10.1016/j.biortech.2010.12.027

Cited by 67 publications

(34 citation statements)

References 23 publications

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“…Recently, the production of these acids has received increasing attention. Strong et al examined destruction of municipal sludge and production of organic acids using wet oxidation treatment followed by anaerobic fermentation [4]. These studies demonstrated combined techniques and new approaches for the handling of municipal sludge.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Wet Oxidation of Pharmaceutical Sludge by Molecular Sieve Loaded with Cu/Ce

2018

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Abstract:In the present study, the catalytic wet oxidation of pharmaceutical sludge by molecular sieve loaded with Cu/Ce as catalyst was investigated. Experiments were performed in an experimental batch reactor. Reaction parameters including catalyst dose, temperature, time, and oxygen pressure were discussed. The results showed that the catalysts prepared by co-precipitating method have good catalytic performance. Under optimum conditions, the highest volatile suspended solids (VSS) removal rate approximately 92% and chemical oxygen demand (COD) removal rate of 75% were obtained at 260 • C for 60 min with initial oxygen pressure 1.0 MPa and the catalyst 10 g/L. These results implied that the catalytic wet oxidation of pharmaceutical sludge by molecular sieve loaded with Cu/Ce is a promising method for the highly efficient degradation of the sludge.

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Section: Introductionmentioning

confidence: 99%

Catalytic Wet Oxidation of Pharmaceutical Sludge by Molecular Sieve Loaded with Cu/Ce

2018

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“…The most common methods include mechanical grinding (Izumi et al, 2010), ultrasound (Elbeshbishy et al, 2011;Jiang et al, 2014), microwave (Marin et al, 2010(Marin et al, , 2011, thermal (Liu et al, 2012;Tampio et al, 2014;Ariunbaatar et al, 2014b), chemical (Elbeshbishy et al, 2011;Ma et al, 2011), biological (Vavouraki et al, 2014) pretreatments or their combination (Strong and Gapes, 2012;Vavouraki et al, 2013). Among these methods, thermal pretreatment (TP) is considered as an economically viable and environmentally friendly alternative, as reported by different authors (Strong et al, 2011;Gianico et al, 2013;Zhou et al, 2013;Ariunbaatar et al, 2014a).…”

Section: Introductionmentioning

confidence: 99%

Mass Loss Controlled Thermal Pretreatment System to Assess the Effects of Pretreatment Temperature on Organic Matter Solubilization and Methane Yield from Food Waste

Yeshanew

Frunzo

Lens

et al. 2016

Front. Environ. Sci.

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HIGHLIGHTS• Direct correlation between substrate composition and TP effect was identified.• The new experimental TP set-up minimized organic compound loss during TP of FW.• The solubilization of carbohydrate and protein determined the optimal temperature of FW TP.• Low temperature (80 • C) TP attained the highest carbohydrate solubilization and methane yield.The effects of thermal pretreatment (TP) on the main characteristics of food waste (FW) and its biochemical methane potential (BMP) and distribution of volatile fatty acids (VFAs) under mesophilic condition (35 • C) were investigated. The TP experiments were carried out at 80, 100, 120 • C for 2 h and 140 • C for 1 h. The designed TP set-up was able to minimize the organic matter loss during the course of the pretreatment. Soluble organic fractions evaluated in terms of chemical oxygen demand (COD) and soluble protein increased linearly with pretreatment temperature. In contrast, the carbohydrate solubilization was more enhanced (30% higher solubilization) by the TP at lower temperature (80 • C). A slight increment of soluble phenols was found, particularly for temperatures exceeding 100 • C. Thermally pretreated FW under all conditions exhibited an improved methane yield compared to the untreated FW, due to the increased organic matter solubilization. The highest cumulative methane yield of 442 (±8.6) mL/gVS added , corresponding to a 28.1% enhancement compared to the untreated FW, was obtained with a TP at 80 • C. No significant variation in the VFAs trends were observed during the BMP tests under all investigated conditions.

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“…reported for FW/OF-MSW [32]. This lower CH4 potential could be due to the removed carbohydrate contents of the waste, supplied as hydrolysates for R. glutinis cultivation in the previous experiments, which has been reported in association with the removal of organic material removal following pre-treatment of organic waste [50]. In the context of the proposed bio-refinery concept, the actual CH4 potential of recycled RS from the hydrolysates of CRFW will require experimental validation.…”

Section: Characteristics Of Residual Solids and Bioenergy Potentialmentioning

confidence: 80%

Bio-Refining of Carbohydrate-Rich Food Waste for Biofuels

2015

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Abstract:The global dependence on finite fossil fuel-derived energy is of serious concern given the predicted population increase. Over the past decades, bio-refining of woody biomass has received much attention, but data on food waste refining are sorely lacking, despite annual and global deposition of 1.3 billion tons in landfills. In addition to negative environmental impacts, this represents a squandering of valuable energy, water and nutrient resources. The potential of carbohydrate-rich food waste (CRFW) for biofuel (by Rhodotorulla glutinis fermentation) and biogas production (by calculating theoretical methane yield) was therefore investigated using a novel integrated bio-refinery approach. In this approach, hydrolyzed CRFW from three different conditions was used for Rhodotorulla glutinis cultivation to produce biolipids, whilst residual solids after hydrolysis were characterized for methane recovery potential via anaerobic digestion. Initially, CRFW was hydrolysed using thermal-(Th), chemical-(Ch) and Th-Ch combined hydrolysis (TCh), with the CRFW-leachate serving as a control (Pcon). Excessive foaming led to the loss of TCh cultures, while day-7 biomass yields were similar (3.4-3.6 g dry weight (DW) L −1 ) for the remaining treatments. Total fatty acid methyl ester (FAME) content of R. glutinis cultivated on CRFW hydrolysates were relatively low (~6.5%) but quality parameters (i.e., cetane number, density, viscosity and higher heating values) of OPEN ACCESSEnergies 2015, 8 6351 biomass extracted biodiesel complied with ASTM standards. Despite low theoretical RS-derived methane potential, further research under optimised and scaled conditions will reveal the potential of this approach for the bio-refining of CRFW for energy recovery and value-added co-product production.

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Combined thermochemical and fermentative destruction of municipal biosolids: A comparison between thermal hydrolysis and wet oxidative pre-treatment

Cited by 67 publications

References 23 publications

Catalytic Wet Oxidation of Pharmaceutical Sludge by Molecular Sieve Loaded with Cu/Ce

Catalytic Wet Oxidation of Pharmaceutical Sludge by Molecular Sieve Loaded with Cu/Ce

Mass Loss Controlled Thermal Pretreatment System to Assess the Effects of Pretreatment Temperature on Organic Matter Solubilization and Methane Yield from Food Waste

Bio-Refining of Carbohydrate-Rich Food Waste for Biofuels

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