Alqaralleh Rania Mona, Kennedy Kevin, Delatolla Robert, Sartaj Majid
Department of Civil Engineering, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
Department of Civil Engineering, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
J Environ Manage. 2016 Dec 1;183(Pt 3):551-561. doi: 10.1016/j.jenvman.2016.09.003. Epub 2016 Sep 9.
Renewable energy and clean environment are two crucial requirements for our modern world. Low cost, energy production and limited environmental impact make anaerobic digestion (AD) a promising technology for stabilizing organic waste and in particular, sewage waste. The anaerobic co-digestion of thickened waste activated sludge (TWAS) and sewage treatment plant trapped fat, oil and grease (FOG) using different FOG-TWAS mixtures (20, 40, 60 and 80% of FOG based on total volatile solids (TVS)) were investigated in this study using both thermophilic (55 ± 1 °C) and two stages hyper-thermophilic/thermophilic (70 ± 1 °C and 55 ± 1 °C) anaerobic co-digestion. The hyper-thermophilic co-digestion approach as a part of the co-digestion process has been shown to be very useful in improving the methane production. During hyper-thermophilic biochemical methane potential (BMP) assay testing the sample with 60% FOG (based on TVS) has been shown to significantly increase the maximum methane production to 673.1 ± 14.0 ml of methane as compared to 316.4 ± 14.3 ml of methane for the control sample. This represents a 112.7% increase in methane production compared to the control sample considered in this paper. These results signify the importance of hyper-thermophilic digestion to the co-digestion of TWAS-FOG field.
可再生能源和清洁环境是我们现代世界的两个关键要求。低成本、能源生产以及有限的环境影响使得厌氧消化（AD）成为一种有前景的技术，可用于稳定有机废物，特别是污水废物。本研究使用嗜热（55±1°C）和两阶段超嗜热/嗜热（70±1°C和55±1°C）厌氧共消化，研究了使用不同的含油污水 - 浓缩剩余活性污泥（TWAS）混合物（基于总挥发性固体（TVS）的含油污水占20%、40%、60%和80%）对浓缩剩余活性污泥和污水处理厂截留的脂肪、油和油脂（FOG）进行厌氧共消化。作为共消化过程一部分的超嗜热共消化方法已被证明在提高甲烷产量方面非常有用。在超嗜热生化甲烷潜力（BMP）试验测试中，与对照样品产生316.4±14.3毫升甲烷相比，含60%含油污水（基于TVS）的样品已被证明可将最大甲烷产量显著提高至673.1±14.0毫升甲烷。与本文所考虑的对照样品相比，这代表甲烷产量增加了112.7%。这些结果表明超嗜热消化对TWAS - FOG领域共消化的重要性。
