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<p>The water from coconuts (<i>Cocos nucifera L</i>.) is used to make sugar and its derivatives. Many agro-industries, like Kopra, release the coconut water as effluent into waterways. In this experiment, performance was evaluated at different HRTs of 15, 12, 10, 8, and 6&#xa0;days using a UAHBR reactor. The maximum daily and volumetric biogas output during a 6-day HRT were 114 L and 877 L.m<sup>−3</sup>, respectively. The maximum specific biogas production and productivity for the 15&#xa0;days of HRT were 225.73 L.kg<sup>−1</sup> TS<sub>added</sub> and 8.7 L.L<sup>−1</sup>. The performance of the full-scale UAHBR was assessed following 16.67 and 15&#xa0;days of operation at various HRTs. The maximal specific biogas production and productivity during the 15-day HRT were 13.50 L.L<sup>−1</sup> and 354.31 L.kg<sup>−1</sup> TS<sub>added</sub>, respectively. The TS reduction was between 79.35 and 81.40 during the 15&#xa0;days of HRT. These results show that residual coconut water can be used to create biogas for a circular economy in business and a sustainable environment.</p>

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Investigation on biogas production from coconut water using a full-scale upflow anaerobic hybrid bioreactor

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月2日

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  • Dayanand Kumbar,
  • P. Shaji James,
  • V. Kavan Kumar,
  • Sachin C. Hallad,
  • D. Ramappa

摘要

The water from coconuts (Cocos nucifera L.) is used to make sugar and its derivatives. Many agro-industries, like Kopra, release the coconut water as effluent into waterways. In this experiment, performance was evaluated at different HRTs of 15, 12, 10, 8, and 6 days using a UAHBR reactor. The maximum daily and volumetric biogas output during a 6-day HRT were 114 L and 877 L.m−3, respectively. The maximum specific biogas production and productivity for the 15 days of HRT were 225.73 L.kg−1 TSadded and 8.7 L.L−1. The performance of the full-scale UAHBR was assessed following 16.67 and 15 days of operation at various HRTs. The maximal specific biogas production and productivity during the 15-day HRT were 13.50 L.L−1 and 354.31 L.kg−1 TSadded, respectively. The TS reduction was between 79.35 and 81.40 during the 15 days of HRT. These results show that residual coconut water can be used to create biogas for a circular economy in business and a sustainable environment.