Dept. of Bioresource Engineering, McGill University, Macdonald Campus, 21111 Lakeshore road, Sainte-Anne-de-Bellevue, Quebec H9X 3V9, Canada.
Dept. of Bioresource Engineering, McGill University, Macdonald Campus, 21111 Lakeshore road, Sainte-Anne-de-Bellevue, Quebec H9X 3V9, Canada.
Waste Manag. 2021 May 1;126:106-118. doi: 10.1016/j.wasman.2021.02.058. Epub 2021 Mar 17.
Orange, one of the most important fruit categories to be consumed across the world, when processed produces 50% of its weight as waste. Current waste management options for orange peel waste are inadequate to use the waste in wholesome and its disposal might lead to other environmental concerns. Here, we present microwave hydrothermal carbonization as an alternative to utilize the orange peel waste. Further, using citric acid to catalyze the microwave hydrothermal carbonization resulted in 30% higher maximal yield of hydrochar, and the hydrochar produced had better elemental, proximate and energy properties than hydrochar made during uncatalyzed microwave hydrothermal carbonization. Further, structural analysis revealed that citric acid promoted the formation of nanospheres during microwave hydrothermal carbonization. Taken together, microwave hydrothermal carbonization of orange peel waste using citric acid as a catalyst might not only help address the waste management concerns for orange peel waste, but also can produce end products of potential commercial value.
橙子是全世界最重要的水果类别之一，加工过程中会产生其重量 50%的废物。目前，橙皮废物的废物管理选择方案不足以合理利用废物，其处置可能会导致其他环境问题。在这里，我们提出微波水热碳化作为利用橙皮废物的一种替代方法。此外，使用柠檬酸作为催化剂进行微波水热碳化可使水热炭的最大产率提高 30%，并且所制备的水炭具有比未经催化的微波水热碳化制备的水炭更好的元素、近似和能量特性。此外，结构分析表明，柠檬酸在微波水热碳化过程中促进了纳米球的形成。总之，使用柠檬酸作为催化剂进行橙皮废物的微波水热碳化不仅有助于解决橙皮废物的废物管理问题，而且还可以生产具有潜在商业价值的最终产品。
