Statistical Optimization of Chemo Sonic Liquefaction in Macroalgae for Biohydrogen Generation—An Energy-Effective Approach
In this study, a combined pretreatment method of sonication and alkali (KOH) liquefaction (SAL) was used to increase the production of biohydrogen from macroalgae (<i>Chaetomorpha antennina</i>) in an energy-efficient manner. Sonication liquefaction (SL) was accomplished by varying the s...
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2023-03-01
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| Online Access: | https://www.mdpi.com/1996-1073/16/7/3017 |
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| author | Shabarish Shankaran Tamilarasan Karuppiah Rajesh Banu Jeyakumar Godvin Sharmila Vincent |
| author_facet | Shabarish Shankaran Tamilarasan Karuppiah Rajesh Banu Jeyakumar Godvin Sharmila Vincent |
| author_sort | Shabarish Shankaran |
| collection | DOAJ |
| description | In this study, a combined pretreatment method of sonication and alkali (KOH) liquefaction (SAL) was used to increase the production of biohydrogen from macroalgae (<i>Chaetomorpha antennina</i>) in an energy-efficient manner. Sonication liquefaction (SL) was accomplished by varying the sonic intensities from 10% to 70% and the pretreatment time from 5 to 60 min. The ideal liquefaction conditions in SL were determined to be 50% for sonic intensity, and 30 min of pretreatment time which produces liquefied organics (LO) release of 2650 mg/L. By adjusting the pH of the alkali (KOH) from 8 to 12, SAL was carried out under SL optimal conditions. With a liquefaction efficiency of 24.61% and LO release of 3200 mg/L, pH 11 was the best for effective macroalgal liquefaction in SAL. SAL (4500 kJ/kg TS) consumed less ultrasonic specific energy (USE) than SL (9000 kJ/kg TS). More VFA was produced in SAL (2160 mg/L) than SL (1070 mg/L). Compared to SL (120 mL H<sub>2</sub>/g COD/0.005 moles of H<sub>2</sub>/g COD), SAL produced the most biohydrogen of 141 mL H<sub>2</sub>/g COD/0.006 moles of H<sub>2</sub>/g COD. The combined pretreatment (SAL) increases the LO release, which ultimately results in an additional 15% increment in biohydrogen production compared to the SL, along with 44.4% of energy savings. Overall, SAL was determined to be energy efficient in biohydrogen production. |
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| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T05:39:22Z |
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| series | Energies |
| spelling | doaj.art-ef394fac0d73420faba98526778e0f3a2023-11-17T16:36:17ZengMDPI AGEnergies1996-10732023-03-01167301710.3390/en16073017Statistical Optimization of Chemo Sonic Liquefaction in Macroalgae for Biohydrogen Generation—An Energy-Effective ApproachShabarish Shankaran0Tamilarasan Karuppiah1Rajesh Banu Jeyakumar2Godvin Sharmila Vincent3Department of Civil Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Avadi, Chennai 600062, Tamil Nadu, IndiaDepartment of Civil Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Avadi, Chennai 600062, Tamil Nadu, IndiaDepartment of Biotechnology, Central University of Tamil Nadu, Thiruvarur 610005, Neelakudi, IndiaDepartment of Civil Engineering, Mar Ephraem College of Engineering and Technology, Marthandam 629171, Tamil Nadu, IndiaIn this study, a combined pretreatment method of sonication and alkali (KOH) liquefaction (SAL) was used to increase the production of biohydrogen from macroalgae (<i>Chaetomorpha antennina</i>) in an energy-efficient manner. Sonication liquefaction (SL) was accomplished by varying the sonic intensities from 10% to 70% and the pretreatment time from 5 to 60 min. The ideal liquefaction conditions in SL were determined to be 50% for sonic intensity, and 30 min of pretreatment time which produces liquefied organics (LO) release of 2650 mg/L. By adjusting the pH of the alkali (KOH) from 8 to 12, SAL was carried out under SL optimal conditions. With a liquefaction efficiency of 24.61% and LO release of 3200 mg/L, pH 11 was the best for effective macroalgal liquefaction in SAL. SAL (4500 kJ/kg TS) consumed less ultrasonic specific energy (USE) than SL (9000 kJ/kg TS). More VFA was produced in SAL (2160 mg/L) than SL (1070 mg/L). Compared to SL (120 mL H<sub>2</sub>/g COD/0.005 moles of H<sub>2</sub>/g COD), SAL produced the most biohydrogen of 141 mL H<sub>2</sub>/g COD/0.006 moles of H<sub>2</sub>/g COD. The combined pretreatment (SAL) increases the LO release, which ultimately results in an additional 15% increment in biohydrogen production compared to the SL, along with 44.4% of energy savings. Overall, SAL was determined to be energy efficient in biohydrogen production.https://www.mdpi.com/1996-1073/16/7/3017biohydrogenliquefied organicsmacroalgaesonic alkali liquefaction |
| spellingShingle | Shabarish Shankaran Tamilarasan Karuppiah Rajesh Banu Jeyakumar Godvin Sharmila Vincent Statistical Optimization of Chemo Sonic Liquefaction in Macroalgae for Biohydrogen Generation—An Energy-Effective Approach Energies biohydrogen liquefied organics macroalgae sonic alkali liquefaction |
| title | Statistical Optimization of Chemo Sonic Liquefaction in Macroalgae for Biohydrogen Generation—An Energy-Effective Approach |
| title_full | Statistical Optimization of Chemo Sonic Liquefaction in Macroalgae for Biohydrogen Generation—An Energy-Effective Approach |
| title_fullStr | Statistical Optimization of Chemo Sonic Liquefaction in Macroalgae for Biohydrogen Generation—An Energy-Effective Approach |
| title_full_unstemmed | Statistical Optimization of Chemo Sonic Liquefaction in Macroalgae for Biohydrogen Generation—An Energy-Effective Approach |
| title_short | Statistical Optimization of Chemo Sonic Liquefaction in Macroalgae for Biohydrogen Generation—An Energy-Effective Approach |
| title_sort | statistical optimization of chemo sonic liquefaction in macroalgae for biohydrogen generation an energy effective approach |
| topic | biohydrogen liquefied organics macroalgae sonic alkali liquefaction |
| url | https://www.mdpi.com/1996-1073/16/7/3017 |
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