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Juliano Souza dos Passos

Hydrothermal liquefaction of sewage sludge; energy considerations and fate of micropollutants during pilot scale processing

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Hydrothermal liquefaction of sewage sludge; energy considerations and fate of micropollutants during pilot scale processing. / Silva Thomsen, Lars Bjørn; Carvalho, Pedro N; Dos Passos, Juliano Souza; Anastasakis, Konstantinos; Bester, Kai; Biller, Patrick.

I: Water Research, Bind 183, 116101, 09.2020.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

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@article{bf38b1d947a94e54bbc5e5c6d83e454b,
title = "Hydrothermal liquefaction of sewage sludge; energy considerations and fate of micropollutants during pilot scale processing",
abstract = "The beneficial use of sewage sludge for valorization of carbon and nutrients is of increasing interest while micropollutants in sludge are of concern to the environment and human health. This study investigates the hydrothermal liquefaction (HTL) of sewage sludge in a continuous flow pilot scale reactor at conditions expected to reflect future industrial installations. The processing is evaluated in terms of energy efficiency, bio-crude yields and quality. The raw sludge and post-HTL process water and solid residues were analyzed extensively for micropollutants via HPLC-MS/MS for target pharmaceuticals including antibiotics, blood pressure medicine, antidepressants, analgesics, x-ray contrast media, angiotensin II receptor blockers, immunosuppressant drugs and biocides including triazines, triazoles, carbamates, a carboxamide, an organophosphate and a cationic surfactant. The results show that a positive energy return on investment was achieved for all three HTL processing temperatures of 300, 325 and 350°C with the most beneficial temperature identified as 325°C. The analysis of the HTL by-products, process water and solids, indicates that HTL is indeed a suitable technology for the destruction of micro-pollutants. However, due to the large matrix effect of the HTL process water it can only be stated with certainty that 9 out of 30 pharmaceuticals and 5 out of 7 biocides products were destroyed successfully (over 98% removal). One compound, the antidepressant citalopram, was shown to be moderately recalcitrant at 300°C with 87% removal and was only destroyed at temperatures 325°C (>99%removal). Overall, the results suggest that HTL is a suitable technology for energy efficient and value added sewage sludge treatment enabling destruction of micropollutants.",
keywords = "Hydrothermal liquefaction, wastewater, sewage sludge, micropollutants, Pharmaceuticals, wastewater treatment",
author = "{Silva Thomsen}, {Lars Bj{\o}rn} and Carvalho, {Pedro N} and {Dos Passos}, {Juliano Souza} and Konstantinos Anastasakis and Kai Bester and Patrick Biller",
year = "2020",
month = sep,
doi = "10.1016/j.watres.2020.116101",
language = "English",
volume = "183",
journal = "Water Research",
issn = "0043-1354",
publisher = "I W A Publishing",

}

RIS

TY - JOUR

T1 - Hydrothermal liquefaction of sewage sludge; energy considerations and fate of micropollutants during pilot scale processing

AU - Silva Thomsen, Lars Bjørn

AU - Carvalho, Pedro N

AU - Dos Passos, Juliano Souza

AU - Anastasakis, Konstantinos

AU - Bester, Kai

AU - Biller, Patrick

PY - 2020/9

Y1 - 2020/9

N2 - The beneficial use of sewage sludge for valorization of carbon and nutrients is of increasing interest while micropollutants in sludge are of concern to the environment and human health. This study investigates the hydrothermal liquefaction (HTL) of sewage sludge in a continuous flow pilot scale reactor at conditions expected to reflect future industrial installations. The processing is evaluated in terms of energy efficiency, bio-crude yields and quality. The raw sludge and post-HTL process water and solid residues were analyzed extensively for micropollutants via HPLC-MS/MS for target pharmaceuticals including antibiotics, blood pressure medicine, antidepressants, analgesics, x-ray contrast media, angiotensin II receptor blockers, immunosuppressant drugs and biocides including triazines, triazoles, carbamates, a carboxamide, an organophosphate and a cationic surfactant. The results show that a positive energy return on investment was achieved for all three HTL processing temperatures of 300, 325 and 350°C with the most beneficial temperature identified as 325°C. The analysis of the HTL by-products, process water and solids, indicates that HTL is indeed a suitable technology for the destruction of micro-pollutants. However, due to the large matrix effect of the HTL process water it can only be stated with certainty that 9 out of 30 pharmaceuticals and 5 out of 7 biocides products were destroyed successfully (over 98% removal). One compound, the antidepressant citalopram, was shown to be moderately recalcitrant at 300°C with 87% removal and was only destroyed at temperatures 325°C (>99%removal). Overall, the results suggest that HTL is a suitable technology for energy efficient and value added sewage sludge treatment enabling destruction of micropollutants.

AB - The beneficial use of sewage sludge for valorization of carbon and nutrients is of increasing interest while micropollutants in sludge are of concern to the environment and human health. This study investigates the hydrothermal liquefaction (HTL) of sewage sludge in a continuous flow pilot scale reactor at conditions expected to reflect future industrial installations. The processing is evaluated in terms of energy efficiency, bio-crude yields and quality. The raw sludge and post-HTL process water and solid residues were analyzed extensively for micropollutants via HPLC-MS/MS for target pharmaceuticals including antibiotics, blood pressure medicine, antidepressants, analgesics, x-ray contrast media, angiotensin II receptor blockers, immunosuppressant drugs and biocides including triazines, triazoles, carbamates, a carboxamide, an organophosphate and a cationic surfactant. The results show that a positive energy return on investment was achieved for all three HTL processing temperatures of 300, 325 and 350°C with the most beneficial temperature identified as 325°C. The analysis of the HTL by-products, process water and solids, indicates that HTL is indeed a suitable technology for the destruction of micro-pollutants. However, due to the large matrix effect of the HTL process water it can only be stated with certainty that 9 out of 30 pharmaceuticals and 5 out of 7 biocides products were destroyed successfully (over 98% removal). One compound, the antidepressant citalopram, was shown to be moderately recalcitrant at 300°C with 87% removal and was only destroyed at temperatures 325°C (>99%removal). Overall, the results suggest that HTL is a suitable technology for energy efficient and value added sewage sludge treatment enabling destruction of micropollutants.

KW - Hydrothermal liquefaction

KW - wastewater

KW - sewage sludge

KW - micropollutants

KW - Pharmaceuticals

KW - wastewater treatment

U2 - 10.1016/j.watres.2020.116101

DO - 10.1016/j.watres.2020.116101

M3 - Journal article

C2 - 32777593

VL - 183

JO - Water Research

JF - Water Research

SN - 0043-1354

M1 - 116101

ER -

492 / i31