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Waste Manag. 2017 Jun;64:327-332. doi: 10.1016/j.wasman.2017.03.004. Epub 2017 Mar 27.

Effect of hydrothermal pre-treatment (HTP) on poultry slaughterhouse waste (PSW) sludge for the enhancement of the solubilization, physical properties, and biogas production through anaerobic digestion.

Author information

1
Plant Engineering Center, Institute for Advanced Engineering, 51 Goan-ro, Yongin City, Kyeonggido 175-28, Republic of Korea. Electronic address: seyong0828@naver.com.
2
Biogas Research Center, Hankyong National University, Anseong City, Kyeonggido 456-749, Republic of Korea.
3
Plant Engineering Center, Institute for Advanced Engineering, 51 Goan-ro, Yongin City, Kyeonggido 175-28, Republic of Korea.
4
Plant Engineering Center, Institute for Advanced Engineering, 51 Goan-ro, Yongin City, Kyeonggido 175-28, Republic of Korea. Electronic address: hokim0505@gmail.com.

Abstract

This study is an assessment of the hydrothermal pre-treatment (HTP) of poultry slaughterhouse waste (PSW) sludge for the enhancement of the solubilization, physical properties, and biogas production through anaerobic digestion. This assessment was carried out to ascertain the optimal HTP temperature. The solubilization and physical properties efficacy was investigated by capillary suction time (CST), time to filter (TTF), and particle size. In addition, the anaerobic digestion was investigated through biochemical methane potential (BMP) tests and subsequent statistical analysis using the modified Gompertz model. HTP was found to have improved the solubilization of the PSW sludge with increasing HTP temperature. In addition, the results of the CST, TTF, and particle size decreased with increasing HTP temperature. These results of the assessment that was conducted in this study confirm that the HTP process indeed modifies the physical properties of PSWs to enhance the solubilization of organic solids. Nevertheless, the results of the BMP tests and the modified Gompertz model analysis show that the optimal HTP temperature of PSWs for anaerobic digestion is 190°C. These findings show that to achieve high conversion efficiency, an accurately designed pre-treatment step must be included in the overall anaerobic digestion process for wastewater treatment.

KEYWORDS:

Anaerobic digestion; Hydrothermal pre-treatment (HTP); Physical properties; Poultry slaughterhouse waste (PSW) sludge; Solubilization

PMID:
28347587
DOI:
10.1016/j.wasman.2017.03.004
[Indexed for MEDLINE]

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