Al Hasani Zahra, Kumar Nayak Jagdeep, Alhimali Halima, Al-Mamun Abdullah
Department of Civil and Architectural Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoud 123, Muscat, Oman.
Department of Civil and Architectural Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoud 123, Muscat, Oman.
Bioresour Technol. 2022 Nov;363:127832. doi: 10.1016/j.biortech.2022.127832. Epub 2022 Aug 24.
Anaerobic digestion (AD) possesses dual benefits of waste treatment and energy generation. The use of conductive additives in AD matrix has potential to improve process yield. Hence, the study aimed to investigate a thermophilic AD (TAD) inserted by granular activated carbon coated with nano zero-valent iron (GAC/nZVI) in the matrix and was operated for mono-digestion and co-digestion of cow manure with food wastes (rice and bread) to check the bioprocess improvement. The results were compared with the control TAD without conductive additives. Biogas production increased by 11 folds upon using GAC/nZVI addition compared to the control TAD. Moreover, the addition of GAC/nZVI increased the methane in biogas by 20.7 folds compared to control one. With GAC/nZVI, the maximum COD removal of 78.29% and 85.21% were noticed for co-digestion and mono digestion, respectively. Such improvement of TAD performance was due to easy bacterial communication and electron exchange through the conductive particles.
厌氧消化（AD）具有废物处理和能源生产的双重益处。在AD基质中使用导电添加剂有可能提高工艺产量。因此，本研究旨在研究在基质中插入涂覆有纳米零价铁的颗粒活性炭（GAC/nZVI）的嗜热AD（TAD），并将其用于牛粪与食物垃圾（大米和面包）的单消化和共消化，以检验生物过程的改进情况。将结果与不含导电添加剂的对照TAD进行比较。与对照TAD相比，添加GAC/nZVI后沼气产量增加了11倍。此外，与对照相比，添加GAC/nZVI使沼气中的甲烷增加了20.7倍。使用GAC/nZVI时，共消化和单消化的最大化学需氧量去除率分别为78.29%和85.21%。TAD性能的这种改善归因于通过导电颗粒实现的细菌间轻松通信和电子交换。
