Impacts of thermal pre-treatments on the semi-continuous anaerobic digestion of waste activated sludge

Bougrier, Claire; Delgenès, Jean-Philippe; Carrère, Hélène

doi:10.1016/j.bej.2006.11.013

Cited by 253 publications

(111 citation statements)

References 20 publications

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“…increased CH 4 yield by 30 % (Sawayama et al 1997). Improved methane production has 57 also been observed in continuously-stirred tank reactors (CSTRs) treating waste 58 activated sludge (WAS), with 12 % and 25 % increases after autoclaving at 135 °C and 59 190 °C, respectively (Bougrier et al 2007). 60…”

Section: Introduction 25mentioning

confidence: 99%

Anaerobic digestion of autoclaved and untreated food waste

et al. 2014

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Section: Introduction 25mentioning

confidence: 99%

Anaerobic digestion of autoclaved and untreated food waste

et al. 2014

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“…In studies done on other matters especially on waste active sludge, the main parameter for classical thermal treatment is temperature also. It is reporting that exposition time has less influence (Bougrier et al, 2007).…”

Section: Effects Of Temperature and Exposition Time On Matter Solubilmentioning

confidence: 99%

Enhancing solubilisation and methane production kinetic of switchgrass by microwave pretreatment

Jackowiak

Frigon

Ribeiro

et al. 2011

Bioresource Technology

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This study investigated the effects of microwave pretreatment of switchgrass in order to enhance its anaerobic digestibility. Response surface analysis was applied to screen the effects of temperature and time of microwave pretreatment on matter solubilisation. The composite design showed that only temperature had a significant effect on solubilisation level. Then the effects of the microwave pretreatment were correlated to the pretreatment temperature. The sCOD/tCOD ratio was equal to 9.4% at 90°C and increased until 13.8% at 180°C. The BMP assays of 42 days showed that microwave pretreatment induced no change on the ultimate volume of methane but had an interesting effect on the reaction kinetic. Indeed, the time required to reach 80% of ultimate volume CH 4 is reduced by 4.5 days at 150°C using the microwave pretreatment.

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“…Most studies on thermo-pressure-based methods for sewage sludge disintegration reported an optimal temperature range of 160°C to 180°C and treatment times of 30 to 60 min [18]. Exposure to higher temperatures can decrease the biodegradability of certain fractions of the feedstock due to the formation of refractory substances [20].…”

Section: Hydrothermal Carbonizationmentioning

confidence: 99%

Potential uses of Elodea nuttallii-harvested biomass

et al. 2011

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Elodea nuttallii (PLANCH) St. John, an aquatic plant native to North America, shows invasive traits outside of its area of origin. In Europe, the plant has spread rapidly in water bodies. In Germany, the massive occurrence of E. nuttallii restricts recreational activities on lakes. Massive occurrences of E. nuttallii have been managed up to now by harvesting the plant and disposing of the biomass as organic waste, which results in high maintenance costs for lake administrators. Alternative uses to the disposal of the biomass were investigated. Analyzing the components and elemental composition of E. nuttallii samples from nine lakes in Germany, several potential uses were identified, such as the use of E. nuttallii biomass as a co-substrate with maize silage for biogas generation. Other potential applications, such as biochart production, soil amelioration, and energy recovery of feedstock chars in combustion plants, were identified from a hydrothermal carbonization process. The presence of β-sitosterol in E. nuttallii, which is used in the treatment of enlarged prostates, indicates a pharmaceutical use. Even though the elemental composition of E. nuttallii biomass contains the elements of a complete fertilizer, this particular use is not recommended given its slow decomposition in soil. The most feasible alternative identified was the use of E. nuttallii biomass as a co-substrate for biogas generation in combination with maize silage. The mixing of E. nuttallii with maize silage to facilitate storage and short distances between biogas plants and lakes with massive occurrence of E. nuttallii are important factors for its applicability.

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Impacts of thermal pre-treatments on the semi-continuous anaerobic digestion of waste activated sludge

Cited by 253 publications

References 20 publications

Anaerobic digestion of autoclaved and untreated food waste

Anaerobic digestion of autoclaved and untreated food waste

Enhancing solubilisation and methane production kinetic of switchgrass by microwave pretreatment

Potential uses of Elodea nuttallii-harvested biomass

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