Combination of Alkaline and Heat Pretreatments with Zero-Valent Iron Application in Cassava Pulp and Wastewater for Methane Generation: Development from Batch to Continuous Systems
Pretreatment with the addition of metals to anaerobic digestion in biogas production is crucial to address improper degradation of organic compounds with low methane production. Biogas production from a combination of cassava pulp and cassava wastewater in the batch system under the variation of alk...
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MDPI AG
2023-01-01
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| Series: | Fermentation |
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| Online Access: | https://www.mdpi.com/2311-5637/9/2/108 |
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| author | Nittaya Boontian Thunchanok Phorndon Chatlada Piasai Mohamad Padri |
| author_facet | Nittaya Boontian Thunchanok Phorndon Chatlada Piasai Mohamad Padri |
| author_sort | Nittaya Boontian |
| collection | DOAJ |
| description | Pretreatment with the addition of metals to anaerobic digestion in biogas production is crucial to address improper degradation of organic compounds with low methane production. Biogas production from a combination of cassava pulp and cassava wastewater in the batch system under the variation of alkaline and heat conditions as a pretreatment was investigated with the zero-valent iron (ZVI) addition after the pretreatment. It was found that alkaline pretreatment at pH 10 with the heat at 100 °C for 30 min combined with 50 g of ZVI kg of TVS<sup>−1</sup> showed the highest methane production up to 4.18 m<sup>3</sup> CH<sub>4</sub> kg TVS<sup>−1</sup>. Nevertheless, chemical oxygen demand (COD) and volatile fatty acid (VFA) removals were slightly reduced when ZVI was added to the system. Furthermore, application in the continuous system showed increased COD and VFA removals after applying alkaline and heat pretreatments. On the other hand, additional ZVI in the substrate after the pretreatments in the continuous system increased the methane production from 0.58 to 0.90 and 0.19 to 0.24 of CH<sub>4</sub> m<sup>3</sup> kg TVS<sup>−1</sup> in 20 and 60 days of hydraulic retention times (HRTs), respectively. Thus, a suitable combination of alkaline and heat pretreatments with ZVI is essential for increasing methane production in batch and continuous systems. |
| first_indexed | 2024-03-11T08:50:32Z |
| format | Article |
| id | doaj.art-1eb92e951efa4f05b59439542e33efe2 |
| institution | Directory Open Access Journal |
| issn | 2311-5637 |
| language | English |
| last_indexed | 2024-03-11T08:50:32Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fermentation |
| spelling | doaj.art-1eb92e951efa4f05b59439542e33efe22023-11-16T20:25:34ZengMDPI AGFermentation2311-56372023-01-019210810.3390/fermentation9020108Combination of Alkaline and Heat Pretreatments with Zero-Valent Iron Application in Cassava Pulp and Wastewater for Methane Generation: Development from Batch to Continuous SystemsNittaya Boontian0Thunchanok Phorndon1Chatlada Piasai2Mohamad Padri3School of Environmental Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, ThailandSchool of Environmental Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, ThailandSchool of Environmental Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, ThailandSchool of Environmental Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, ThailandPretreatment with the addition of metals to anaerobic digestion in biogas production is crucial to address improper degradation of organic compounds with low methane production. Biogas production from a combination of cassava pulp and cassava wastewater in the batch system under the variation of alkaline and heat conditions as a pretreatment was investigated with the zero-valent iron (ZVI) addition after the pretreatment. It was found that alkaline pretreatment at pH 10 with the heat at 100 °C for 30 min combined with 50 g of ZVI kg of TVS<sup>−1</sup> showed the highest methane production up to 4.18 m<sup>3</sup> CH<sub>4</sub> kg TVS<sup>−1</sup>. Nevertheless, chemical oxygen demand (COD) and volatile fatty acid (VFA) removals were slightly reduced when ZVI was added to the system. Furthermore, application in the continuous system showed increased COD and VFA removals after applying alkaline and heat pretreatments. On the other hand, additional ZVI in the substrate after the pretreatments in the continuous system increased the methane production from 0.58 to 0.90 and 0.19 to 0.24 of CH<sub>4</sub> m<sup>3</sup> kg TVS<sup>−1</sup> in 20 and 60 days of hydraulic retention times (HRTs), respectively. Thus, a suitable combination of alkaline and heat pretreatments with ZVI is essential for increasing methane production in batch and continuous systems.https://www.mdpi.com/2311-5637/9/2/108cassava pulpalkaline hydrolysisheatmethane productionzero-valent iron |
| spellingShingle | Nittaya Boontian Thunchanok Phorndon Chatlada Piasai Mohamad Padri Combination of Alkaline and Heat Pretreatments with Zero-Valent Iron Application in Cassava Pulp and Wastewater for Methane Generation: Development from Batch to Continuous Systems Fermentation cassava pulp alkaline hydrolysis heat methane production zero-valent iron |
| title | Combination of Alkaline and Heat Pretreatments with Zero-Valent Iron Application in Cassava Pulp and Wastewater for Methane Generation: Development from Batch to Continuous Systems |
| title_full | Combination of Alkaline and Heat Pretreatments with Zero-Valent Iron Application in Cassava Pulp and Wastewater for Methane Generation: Development from Batch to Continuous Systems |
| title_fullStr | Combination of Alkaline and Heat Pretreatments with Zero-Valent Iron Application in Cassava Pulp and Wastewater for Methane Generation: Development from Batch to Continuous Systems |
| title_full_unstemmed | Combination of Alkaline and Heat Pretreatments with Zero-Valent Iron Application in Cassava Pulp and Wastewater for Methane Generation: Development from Batch to Continuous Systems |
| title_short | Combination of Alkaline and Heat Pretreatments with Zero-Valent Iron Application in Cassava Pulp and Wastewater for Methane Generation: Development from Batch to Continuous Systems |
| title_sort | combination of alkaline and heat pretreatments with zero valent iron application in cassava pulp and wastewater for methane generation development from batch to continuous systems |
| topic | cassava pulp alkaline hydrolysis heat methane production zero-valent iron |
| url | https://www.mdpi.com/2311-5637/9/2/108 |
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