![]() Therefore, the present study aimed to investigate the hyperthermophilic AD of binary mixture of TWAS: OFMSW (50:50, w/w) and trinary mixtures of TWAS: OFMSW and FOG with different FOG% (10, 20 and 30%). The results showed that hyper-thermophilic digestion improved the overall anaerobic co-digestion process which led to higher biogas production, higher methane yield, as well as increasing the ability of the digester to digest mixtures with high FOG contents (up to 60% based on TVS) without causing adverse effects on the AD process. used the hyperthermophilic method for the co-digestion of TWAS and FOG. Hyper-thermophilic digestion at 70 ± 1☌ temperature is a relatively new approach in the sludge/TWAS AD. This is due to FOG high theoretical methane potential (0.70-1.43 m 3 CH 4/kg volatile solids). Additionally, adding FOG to the co-digestion mixture proved to be an effective way to boost the biogas production and increase methane yields resulting from the AD process. Organic fraction of municipal solid waste (OFMSW) has high C/N ratios, when co-digested with TWAS, OFMSW will balance the overall C/N ratio in the mixture for more stable AD process. However, sludge low (C/N) ratio that generally ranges from 6 to 9 negatively impact the efficiency of AD process especially under the traditional mesophilic conditions. Sewage sludge in the form of primary sludge (PS), waste activated sludge (WAS) and thickened waste activated sludge (TWAS) is the most popular waste that is treated using AD. The slow biogas production rate during the AD process, biogas low energy content (low methane%), and the high cost to upgrade the produced biogas are some of the critical challenges that WWTPs industry is facing to deploy biogas production and utilization. However, the biogas utilization in wastewater treatment plants (WWTPs) is still limited for example, in the US less than 10% of the WWTPs produce biogas for beneficial use such as heat and power generation. Anaerobic digestion (AD) is a widely-applied method for generating biogas from organic waste. Biogas harvested from organic wastes is a potential renewable source of energy alternative to fossil fuels. Renewable energy industries have been developed incredibly fast in the recent years. Thickened waste activated sludge Organic fraction of municipal solid waste FOG Hyper-thermophilic anaerobic digestion Methane yield Introduction 30% FOG in the co-digestion mixture enhanced the biogas methane content for sample TWAS:OFMSW:30%FOG(H) to 66.4% compared to 60.1% for the control sample TWAS(T), and accordingly improved the methane yield to be 84.4% higher than the methane yield of the control. Additionally, 10, 20 and 30% FOG (based on total volatile solids) were added to the co-digestion mixtures in order to boost the biogas production and methane yield in three hyperthermophilic assays. The hyper-thermophilic BMP assays outperformed the thermophilic BMP assays by providing faster biogas production rates, higher cumulative biogas productions and methane yields. In this study the anaerobic co-digestion of organic fraction of municipal solid waste, with thickened waste activated sludge (50:50, w/w based on total volatile solids) was investigated using anaerobic digestion thermophilic and hyper-thermophilic biochemical methane potential (BMP) assays. This will not only help convert these potential waste streams from landfills increasing the longevity of existing landfills, but also provide a sustainable waste to energy waste management method. The use of organic fraction of municipal solid waste and Fat Oil and Grease (FOG) as co-substrates for thickened waste activated sludge anaerobic digestion has the potential to improve the biodegradation process and significantly enhance biogas production and methane yields. Visit for more related articles at Journal of Bioremediation & Biodegradation This is an open-a ccess article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Received Date: AugAccepted Date: AugPublished Date: August 28, 2017Ĭitation: Alqaralleh R, Kennedy K, Delatolla R, Sartaj M (2017) Biogas Recovery from Hyper-Thermophilic Anaerobic Co-Digestion of Thickened Waste Activated Sludge, Organic Fraction of Municipal Solid Waste and Fat, Oil and Grease. Biogas Recovery from Hyper-Thermophilic Anaerobic Co-Digestion of Thickened Waste Activated Sludge, Organic Fraction of Municipal Solid Waste and Fat, Oil and GreaseĪlqaralleh R *, Kennedy K, Delatolla R, and Sartaj Mĭepartment of Civil Engineering, University of Ottawa, Ottawa, ON, Canada *Corresponding Author: Alqaralleh R
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |