Shockwave Pre-Treatment Enhances the Physicochemical Availability and Anaerobic Mono- and Co-Digestion of Highly Concentrated Algae

40 Pages Posted: 22 Aug 2022

See all articles by Jonghwa Lee

Jonghwa Lee

Chosun University

Heewon Jang

Chosun University

Seongseung Kang

Chosun University

Kyungmi Kim

affiliation not provided to SSRN

Jungyu Park

Chosun University

Abstract

The effect of shockwave pre-treatment of algae on biogas production and physical availability was elucidated by lab-scale experiments. Solubilization rate, dewaterability, drying performance, microcystin concentration, and anaerobic mono- and co-digestion efficiencies before and after shockwave application were compared to other pre-treatment techniques, such as ultrasonication and thermal hydrolysis. Dewaterability and drying efficiencies of algae pretreated with shockwaves were 5.2 and 2.1 times higher than non-pretreated algae. Non-pretreated algae improved solubilization from 12% to 47%. The shockwave pre-treatment enhanced the reduction of the extracted microcystin concentration from 391.9 to 350.9 μg/L without affecting the methane production rate. The cumulative methane yield increased from 197.6 to 414.5 mL/g-VS and from 290.1 to 375.0 mL/g-VS for mono- and co-digestion, respectively. Co-digestion with 3 kJ/g-VS revealed the highest energy efficiency of 482.8%. Overall, the shockwave pre-treatment significantly enhanced algae physicochemical availability and methane production rate.

Keywords: Algae, livestock manure, pre-treatment, shockwave, Anaerobic co-digestion

Suggested Citation

Lee, Jonghwa and Jang, Heewon and Kang, Seongseung and Kim, Kyungmi and Park, Jungyu, Shockwave Pre-Treatment Enhances the Physicochemical Availability and Anaerobic Mono- and Co-Digestion of Highly Concentrated Algae. Available at SSRN: https://ssrn.com/abstract=4196399 or http://dx.doi.org/10.2139/ssrn.4196399

Jonghwa Lee

Chosun University ( email )

3215 The 2nd Building of College of Engineering
375 Seosuk-Dong, Dong-Gu
Kwangju 501-759
Korea, Republic of (South Korea)

Heewon Jang

Chosun University ( email )

3215 The 2nd Building of College of Engineering
375 Seosuk-Dong, Dong-Gu
Kwangju 501-759
Korea, Republic of (South Korea)

Seongseung Kang

Chosun University ( email )

3215 The 2nd Building of College of Engineering
375 Seosuk-Dong, Dong-Gu
Kwangju 501-759
Korea, Republic of (South Korea)

Kyungmi Kim

affiliation not provided to SSRN ( email )

No Address Available

Jungyu Park (Contact Author)

Chosun University ( email )

3215 The 2nd Building of College of Engineering
375 Seosuk-Dong, Dong-Gu
Kwangju 501-759
Korea, Republic of (South Korea)

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