Institute Center for Energy (iEnergy), Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates.
Institute Center for Energy (iEnergy), Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates.
Bioresour Technol. 2016 Oct;217:137-40. doi: 10.1016/j.biortech.2016.02.035. Epub 2016 Feb 11.
Amberlite IRA-67 and activated carbon were tested as promising candidates for carboxylic acid recovery by adsorption. Dark fermentation was performed without pH control and without addition of external inoculum at 37°C in batch mode. Lactic, acetic and butyric acids, were obtained, after 7days of fermentation. The maximum acid removal, 74%, from the Amberlite IRA-67 and 63% from activated carbon was obtained from clarified fermentation broth using 200gadsorbent/Lbroth at pH 3.3. The pH has significant effect and pH below the carboxylic acids pKa showed to be beneficial for both the adsorbents. The un-controlled pH fermentation creates acidic environment, aiding in adsorption by eliminating use of chemicals for efficient removal. This study proposes simple and easy valorization of waste to valuable chemicals.
Amberlite IRA-67 和活性炭被测试为通过吸附回收羧酸的有前途的候选物。暗发酵在 37°C 分批模式下进行，无需 pH 控制，也无需添加外部接种物。发酵 7 天后，得到乳酸、乙酸和丁酸。从澄清发酵液中用 200g 吸附剂/L 发酵液在 pH 3.3 下从 Amberlite IRA-67 和活性炭中获得最大的酸去除率，分别为 74%和 63%。pH 有显著影响，低于羧酸 pKa 的 pH 有利于两种吸附剂。未控制 pH 的发酵会产生酸性环境，通过消除使用化学品进行有效去除，从而有助于吸附。本研究提出了一种简单易行的废物增值方法，可将废物转化为有价值的化学品。
