Kalantzis Demetrios, Daskaloudis Ioannis, Lacoere Tim, Stasinakis Athanasios S, Lekkas Demetris F, De Vrieze Jo, Fountoulakis Michail S
Department of Environment, University of the Aegean, University Hill, Mytilene, Greece.
Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-900 Gent, Belgium.
Bioresour Technol. 2023 May;376:128908. doi: 10.1016/j.biortech.2023.128908. Epub 2023 Mar 17.
This work examines the continuous addition (5 g/L) of conductive granular activated carbon (GAC) in an integrated pilot-scale unit containing an anaerobic digester (180 L) and an aerobic submerged membrane bioreactor (1600 L) connected in series for the treatment of agro-industrial wastewater. Biogas production increased by 32 % after the addition of GAC. Methanosaeta was the dominant methanogen in the digester, and its relative abundance increased after the addition of GAC. The final effluent after post-treatment with the aerobic membrane bioreactor had a total solids content <0.01 g/L and a chemical oxygen demand between 120 and 150 mg/L. A simple cost analysis showed that GAC addition is potentially profitable, but alternatives ways of retaining the GAC in the system need to be found. Overall, this study provides useful scientific data for the possible application of GAC in full-scale biogas projects.
本研究考察了在一个串联的中试规模集成装置中持续添加（5 g/L）导电颗粒活性炭（GAC），该装置包含一个厌氧消化器（180 L）和好氧浸没式膜生物反应器（1600 L），用于处理农业工业废水。添加GAC后，沼气产量增加了32%。甲烷八叠球菌是消化器中的主要产甲烷菌，添加GAC后其相对丰度增加。好氧膜生物反应器后处理后的最终出水总固体含量<0.01 g/L，化学需氧量在120至150 mg/L之间。简单的成本分析表明，添加GAC可能有利可图，但需要找到将GAC保留在系统中的替代方法。总体而言，本研究为GAC在全规模沼气项目中的可能应用提供了有用的科学数据。
