Enhancement of thermophilic anaerobic digestion of thickened waste activated sludge by combined microwave and alkaline pretreatment

Chi, Yongzhi; Li, Yu-You; Fei, Xuening; Wang, Shaopo; Yuan, Hang

doi:10.1016/s1001-0742(10)60561-x

Cited by 66 publications

(22 citation statements)

References 36 publications

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“…Generally sewage sludge can thicken on 3% to 6% of dry matter. Value of dry matter in other papers was similar and values are ranged 4 – 5% [22]. Values in the table also show that samples content relatively high rate of inorganic particle, approximately 35%.…”

Section: Resultssupporting

confidence: 69%

Thixotropic behaviour of thickened sewage sludge

Trávníček

Junga

2014

J Environ Health Sci Engineer

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The aim of the work is a description of the rheological behaviour of thickened sewage sludge. The sample of thickened sludge was collected from the wastewater treatment plant, where pressure flotation unit is used for a process of thickening. The value of dry matter of collected sample was 3.52%. Subsequently the sample was diluted and the rheological properties of individual samples were obtained. Several types of rheological tests were used for the determination of the sample. At first the hysteresis loop test was performed. The next test was focused on the time-dependency, i.e. measurement of dependence of dynamic viscosity on the time at constant shear rate. Further dependence dynamic viscosity on the temperature was performed. Then the activation energy was obtained from measured values. Finally, the hysteresis areas were counted and measured values were evaluated with use of Herschel-Bulkley mathematical model.

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Section: Resultssupporting

confidence: 69%

Thixotropic behaviour of thickened sewage sludge

Trávníček

Junga

2014

J Environ Health Sci Engineer

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“…However, its application is often limited by high retention time because of low methane production and biodegradability (Bolzonella et al, 2005) due to the hydrolysis step of sewage sludge treatment (Kuglarz et al, 2013). Different pre-treatments, such as ultrasonic, ozone, mechanical, alkaline, and thermal processes (Braguglia et al, 2012;Chi et al, 2011;Lehne et al, 2001;Martin et al, 2015;Ruffino et al, 2015), have been proposed to enhance the hydrolysis and biomethanisation of sewage sludge.…”

Section: Introductionmentioning

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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“…The TS of the dewatered sludge was up to 12%, its VS/TS ratio was 0.75 and its chemical oxygen demand (COD) was up to 68 g/kg. Chi et al (2011) reported on anaerobic digestion of thickened waste activated sludge, whose TS was up to 5% and VS/TS ratio was 0.76, with microwave and alkaline pre-treatment. Duan et al (2012) and Dong et al (2012) reported on mesophilic anaerobic digestion of sewage sludge of 23% TS, but the VS/TS ratio of their sludge was as low as 0.5-0.6.…”

Section: Introductionmentioning

confidence: 99%