Comparative performance of mesophilic and thermophilic anaerobic digestion for high-solid sewage sludge

Hidaka, Taira; Wang, Feng; Togari, Taketo; Uchida, Tsutomu; Suzuki, Yutaka

doi:10.1016/j.biortech.2013.09.033

Cited by 69 publications

(26 citation statements)

References 19 publications

(27 reference statements)

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“…Nitrogen is one of the inhibitory compounds associated with the anaerobic digestion of sewage sludge (Hidaka et al, 2013). The DTN after ozonation was while with ultrasonic treatment it was.…”

Section: Effects Of Pre-treatments On Sludge Solubilisationmentioning

confidence: 99%

Effect of ultrasonic and ozone pre-treatments on pharmaceutical waste activated sludge’s solubilisation, reduction, anaerobic biodegradability and acute biological toxicity

Jin

Yao

Wang

et al. 2015

Bioresource Technology

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Section: Effects Of Pre-treatments On Sludge Solubilisationmentioning

confidence: 99%

Effect of ultrasonic and ozone pre-treatments on pharmaceutical waste activated sludge’s solubilisation, reduction, anaerobic biodegradability and acute biological toxicity

Jin

Yao

Wang

et al. 2015

Bioresource Technology

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“…Due to the viscosity, yield stress, fluid consistency increases with the increase of the solid concentrations (Markis et al, 2014), sludge rheology is particularly important in the AD of concentrated sludge. According to Hidaka et al (2013), although the AD of sewage sludge with Total Solid (TS) concentrations higher than 10% could successfully operate under mesophilic conditions, the high viscosity would be of serious concern in full-scale operation. According to previous studies, the rheology of sewage sludge depends on the sludge origin, temperature (Feng et al, 2014a) and solid concentrations (Markis et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Rheological properties of sewage sludge during enhanced anaerobic digestion with microwave-H2O2 pretreatment

et al. 2016

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a b s t r a c tThe rheological behavior of sludge is of serious concern in anaerobic digestion. This study investigated the rheological properties of sewage sludge during enhanced anaerobic digestion with microwave-H 2 O 2 pretreatment (MW-H 2 O 2 ). The results showed that MW-H 2 O 2 pretreatment resulted in the improvement of sludge flowability and weakening of its viscoelastic properties. Further positive effects on the rheological properties of digested sludge during anaerobic digestion were observed. The flowability was improved with a low level of apparent viscosity. The decrease of the consistency index and increase of the flow behavior index indicated that the strength of the inner structures and non-Newtonian flow characteristics of digested sludge weakened. Both the storage modulus (G 0 ) and loss modulus (G 00 ) decreased, indicating that the viscoelastic behavior became weak. These effects were possibly attributed to the changes of the digested sludge micro-structures, such as extracellular polymeric substances (EPS). This study concluded that anaerobic digestion for treating sewage sludge combined with pretreatment is a more favorable option than single anaerobic digestion from the perspective of rheology.

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“…During the experiment, the ammonia concentration gradually increased, and adaptation to this high concentration may have occurred. In thermophilic operation, ammonia inhibition is more severe than in mesophilic operation as many researchers reported (for example, Sung and Liu, 2003), and methane production was not stable when the ammonia concentration was over 2,000 mgN/L (Hidaka et al, 2013). Yamashiro et al (2013) recommended thermophilic rather than mesophilic digestion for co-digestion of cow manure and food processing waste, but the ammonia concentration was as low as approximately 2,400 mgN/L in their experiment.…”

Section: Characteristics Of Digested Sludgementioning

confidence: 98%

“…Digested sludge can be used as fertilizer (Pabón-Pereira et al, 2014), particularly near small facilities, but the effect of concentrated sewage sludge on the fertilizer characteristics of digested sludge is unknown. Hidaka et al (2013) compared mesophilic and thermophilic anaerobic digestion of high-solids sewage sludge, but the organic loading rate (OLR) was less than 2.0 kgVS/(m 3 ·d). The OLR could be increased more, but its limit is uncertain.…”

Section: Introductionmentioning

confidence: 99%

Anaerobic Digestion of Sewage Sludge with High Solid Content and Its Use as Fertilizer

Hidaka

Sawahara²,

Togari

et al. 2015

J. of Wat. & Envir. Tech.

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In local cities with decentralized small wastewater treatment plants (WWTPs), centralized anaerobic digestion at a WWTP that accepts more sludge from others can serve as the energy hub of the region. In this system, transportation of sewage sludge with a high solid content by vehicles and the use of digested sludge as fertilizer are promising. The present study evaluated the effect of high solid content on anaerobic digestion and on the quality of the digested sludge as a fertilizer in a 1,100-day continuous laboratory experiment. Mixed sewage sludge with 10% total solids was subjected to mesophilic anaerobic digestion with a volatile solids (VS) removal ratio of approximately 0.6. The acceptable organic loading rate was lower than 3.2 kgVS/(m 3 ·d). The viscosity increased to 8.5 dPa·s, but computational fluid dynamics analysis confirmed that mixing need not be upgraded under conditions of high solid content. Component and eluted material analyses of the digested sludge as a fertilizer confirmed that the high solid content in the sewage sludge does not limit the use of digested sludge as a fertilizer according to the Japanese Fertilizer Control Act. The results showed that this centralized anaerobic digestion system is useful for sludge management in small facilities.Keywords: anaerobic digestion of high solid sewage sludge, computational fluid dynamics (CFD), fertilizer

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Comparative performance of mesophilic and thermophilic anaerobic digestion for high-solid sewage sludge

Cited by 69 publications

References 19 publications

Effect of ultrasonic and ozone pre-treatments on pharmaceutical waste activated sludge’s solubilisation, reduction, anaerobic biodegradability and acute biological toxicity

Effect of ultrasonic and ozone pre-treatments on pharmaceutical waste activated sludge’s solubilisation, reduction, anaerobic biodegradability and acute biological toxicity

Rheological properties of sewage sludge during enhanced anaerobic digestion with microwave-H2O2 pretreatment

Anaerobic Digestion of Sewage Sludge with High Solid Content and Its Use as Fertilizer

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