Department of Chemical Engineering and Materials Science/Environmental Technology Research Center, Yuan Ze University, Chung-Li District, Taoyuan City 32003, Taiwan; Environmental Technology Research Center, Yuan Ze University, Chung-Li District, Taoyuan City 32003, Taiwan.
Department of Chemical Engineering and Materials Science/Environmental Technology Research Center, Yuan Ze University, Chung-Li District, Taoyuan City 32003, Taiwan; Environmental Technology Research Center, Yuan Ze University, Chung-Li District, Taoyuan City 32003, Taiwan.
Sci Total Environ. 2023 May 20;874:162437. doi: 10.1016/j.scitotenv.2023.162437. Epub 2023 Feb 28.
The use of fossil fuels, emission of greenhouse gases (GHG) into the atmosphere, and waste pose a problem to the environment and public health that urgently needs to be dealt with. Among numerous chemical activating agents that can be added to anaerobic digestion (AD) to enhance nutrient removal and increase the quality and quantity of biomethane, iron chloride (FeCl) is the one that has the lowest cost and is the most environmentally friendly. This state-of-the-art review aims to revise the influence of FeCl on the Brunauer-Emmett-Teller (BET) surface area of biochar and its ability to increase methane (CH) yield and remove contaminants from biogas and wastewater. The novelty of the study is that FeCl, an activating agent, can increase the BET surface area of biochar, and its efficacy increases when combined with zinc chloride or phosphoric acid. Regarding the removal of contaminants from wastewater and biogas, FeCl has proven to be an effective coagulant, reducing the chemical oxygen demand (COD) of wastewater and hydrogen sulfide in biogas. The performance of FeCl depends on the dosage, pH, and feedstock used. Therefore, FeCl can increase the BET surface area of biochar and CH yield and remove contaminants from wastewater and biogas. More research is needed to investigate the ability of FeCl to remove water vapor and carbon dioxide during biogas production while accounting for a set of other parameters, including FeCl size.
化石燃料的使用、温室气体（GHG）排放到大气中以及废物对环境和公共健康构成了一个亟待解决的问题。在众多可以添加到厌氧消化（AD）中以增强养分去除、提高生物甲烷质量和数量的化学活化剂中，氯化铁（FeCl）是成本最低、最环保的一种。本综述旨在修订 FeCl 对生物炭的 Brunauer-Emmett-Teller（BET）比表面积的影响及其提高甲烷（CH）产量和去除沼气和废水中污染物的能力。该研究的新颖之处在于，活化剂 FeCl 可以增加生物炭的 BET 比表面积，当与氯化锌或磷酸结合使用时，其效果会增强。关于废水和沼气中污染物的去除，FeCl 已被证明是一种有效的混凝剂，可降低废水中的化学需氧量（COD）和沼气中的硫化氢。FeCl 的性能取决于剂量、pH 值和所用原料。因此，FeCl 可以增加生物炭的 BET 比表面积和 CH 产量，并去除废水和沼气中的污染物。需要进一步研究 FeCl 在考虑一组其他参数（包括 FeCl 尺寸）的情况下，在沼气生产过程中去除水蒸气和二氧化碳的能力。
