蛋壳废料中钙的潜力可用于可持续生产木薯废水中的沼气。
Potential of eggshell waste derived calcium for sustainable production of biogas from cassava wastewater.
机构信息
Graduate Program in Process Engineering, Tiradentes University, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, SE, Brazil; Biomass Technology Laboratory, Department of Chemical Engineering and Biotechnology Engineering, Université de Sherbrooke, 2500 Boul. de L'Université, Sherbrooke, J1K 2R1, Québec, Canada.
Graduate Program in Process Engineering, Tiradentes University, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, SE, Brazil; Biomass Technology Laboratory, Department of Chemical Engineering and Biotechnology Engineering, Université de Sherbrooke, 2500 Boul. de L'Université, Sherbrooke, J1K 2R1, Québec, Canada.
出版信息
J Environ Manage. 2022 Nov 1;321:116000. doi: 10.1016/j.jenvman.2022.116000. Epub 2022 Aug 17.
Cassava is a staple crop that plays a significant role in the food security of many countries. However, its processing produces a liquid by-product known as cassava wastewater (CW), which can have adverse environmental consequences if discarded without treatment. Despite its cyanide content, CW has a high organic content and may be profitable when used to produce biogas. In this study, the influence of calcium particles from eggshell residues was investigated on the anaerobic digestion of CW. Moreover, the performance of the bioreactor was remotely monitored. Calcium particles from milled-calcined chicken eggshells were added to the bioreactor, and biogas production was investigated for 21 days. Adding 1 g/L and 3 g/L of calcium particles increased biogas (Bio H + Bio CH) production by 195% and 338%, respectively. Finally, the requirement for digestate post-treatment before use in agriculture was observed after assessing its phytotoxicity through the germination and root growth of L. sativa seeds.
木薯是一种主食作物，在许多国家的粮食安全中起着重要作用。然而，它的加工会产生一种液体副产品，称为木薯废水（CW），如果未经处理就丢弃，可能会对环境产生不利影响。尽管 CW 含有氰化物，但它的有机含量很高，如果用于生产沼气可能会盈利。在这项研究中，研究了蛋壳残渣中的钙颗粒对 CW 的厌氧消化的影响。此外，还远程监测了生物反应器的性能。将粉碎煅烧的鸡蛋壳中的钙颗粒添加到生物反应器中，并对沼气生产进行了 21 天的研究。分别添加 1 g/L 和 3 g/L 的钙颗粒，沼气（Bio H + Bio CH）产量分别增加了 195%和 338%。最后，通过对 L. sativa 种子的发芽和根生长进行评估，观察了在农业中使用前对消化物进行后处理的必要性。
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