Traceability of organic contaminants in the sludge line of wastewater treatment plants: A comparison study among schemes incorporating thermal hydrolysis treatment and the conventional anaerobic digestion

Díaz, Israel; Díaz-Curbelo, Alina; Pérez-Lemus, N.; Fdz‐Polanco, F.; Pérez-Elvira, S.I.

doi:10.1016/j.biortech.2020.123028

Cited by 17 publications

(2 citation statements)

References 33 publications

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“…The laboratory-scale hydrolysis system consists of a 2 L reactor where substrate was introduced and is heated by the steam and a 5 L flash tank where the steam explosion takes place once the hydrolysis reaction time has passed (Figure 1). A detailed description of the thermal hydrolysis TH equipment was recently published by Diez et al [23]. The temperature and pressure were maintained constant until depressurization at values of 170 • C and 7 ± 0.2 bar, respectively.…”

Section: Thermal Hydrolysis Pretreatmentmentioning

confidence: 99%

Energy Integration of Thermal Pretreatment in Anaerobic Digestion of Wheat Straw

García Álvaro,

Ruiz Palomar,

Díaz Villalobos

et al. 2024

Energies

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Cereal straw stands out as one of the most abundant and globally distributed agricultural residues. Traditional applications cope with a limited amount of production, leaving the remainder in the field for natural decomposition. Managing cereal straw through controlled biological transformation under anaerobic conditions holds the potential to generate added value in the form of bioenergy. However, the lignocellulosic composition of these substrates poses challenges for organic degradation, often requiring energy-intensive pretreatments. A detailed study with a comprehensive calculation of the overall energy balance of the integrated process is proposed, aiming to provide real added value and replicability. Three scenarios for wheat straw transformation were investigated, incorporating two preliminary pre-treatment stages—mechanical milling and physicochemical steam explosion. Three conditions of pretreatment were essayed, varying the time exposure of the steam explosion. The subsequent energy integration analysis revealed that the process was optimized by up to 15% in the final energy balance when the steam explosion was set to 10 min. The macromolecular composition determination revealed that the thermal pretreatment reduced the lag phase of the hydrolysis step through hemicellulose breakdown.

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Section: Thermal Hydrolysis Pretreatmentmentioning

confidence: 99%

Energy Integration of Thermal Pretreatment in Anaerobic Digestion of Wheat Straw

García Álvaro,

Ruiz Palomar,

Díaz Villalobos

et al. 2024

Energies

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“…Thermal hydrolysis is a viable method of making sewage sludge more susceptible to anaerobic digestion. Thermal hydrolysis is a procedure that involves heating sludge to the desired temperature, typically using saturated steam injection, to facilitate subsequent anaerobic digestion (Díaz et al 2020). The best treatment temperature for thermal hydrolysis is between 160 and 180 °C with a pressure ranging from 600 to 2500 kPa in several experiments (Stuckey and McCarty 1984;Neyens and Baeyens 2003;Bougrier et al 2008;Carrère et al 2010;Barber 2016).…”

Section: Thermal Hydrolysismentioning

confidence: 99%

Methods to alleviate the inhibition of sludge anaerobic digestion by emerging contaminants: a review

et al. 2022

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The rising occurrence of emerging contaminants in sludges both inhibits the anaerobic digestion of sludges and induces health issues when sludges are recycled in agriculture, calling for methods to remove contaminants. Here we review emerging pollutants in wastewater treatment plants, before and after anaerobic digestion. We present their inhibitory effects and remediation methods to alleviate inhibition. Pharmaceuticals have been detected in about 50% of the sludge samples. Sewage sludge contaminants include 19% of diuretics, 16–21% of lipid-modifying agents, hydrochlorothiazide, diclofenac, furosemide, clarithromycin, atorvastatin, and carbamazepine. Levels of antibiotics, azithromycin, ciprofloxacin, and estrone range from 500 to 600 ng/g in sludges from wastewater treatment plants. Remediation methods comprise electrooxidation, ultrasonication, thermal hydrolysis, ozonation, and bioaugmentation. Fermenting the sludges with acidogenic bacteria reduces the level of emerging pollutants in the supernatant. Nonetheless, liquid digestates still contains emerging pollutants such as sunscreen octocrylene at 147 ug/L and acetaminophen at 58.6 ug/L. As a result, pretreatment of sludge containing emerging pollutants is required.

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Thermal Hydrolysis to Enhance Anaerobic Digestion Performance of Wastewater Sludge

Chang

Filer

2020

Curr Pollution Rep

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Traceability of organic contaminants in the sludge line of wastewater treatment plants: A comparison study among schemes incorporating thermal hydrolysis treatment and the conventional anaerobic digestion

Cited by 17 publications

References 33 publications

Energy Integration of Thermal Pretreatment in Anaerobic Digestion of Wheat Straw

Energy Integration of Thermal Pretreatment in Anaerobic Digestion of Wheat Straw

Methods to alleviate the inhibition of sludge anaerobic digestion by emerging contaminants: a review

Thermal Hydrolysis to Enhance Anaerobic Digestion Performance of Wastewater Sludge

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