scholarly journals Towards a sustainable paradigm of waste-to-energy process: Enhanced anaerobic digestion of sludge with woody biochar

2016 ◽  
Vol 135 ◽  
pp. 1054-1064 ◽  
Author(s):  
Yanwen Shen ◽  
Jessica L. Linville ◽  
Patricia Anne A. Ignacio-de Leon ◽  
Robin P. Schoene ◽  
Meltem Urgun-Demirtas
Keyword(s):  
Anaerobic Digestion ◽  
Waste To Energy ◽  
Energy Process

scholarly journals Waste to Energy: A Focus on the Impact of Substrate Type in Biogas Production

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1224
Author(s):  
Nwabunwanne Nwokolo ◽  
Patrick Mukumba ◽  
KeChrist Obileke ◽  
Matthew Enebe
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Industrial Waste ◽  
Animal Manure ◽  
Nutritional Composition ◽  
Organic Wastes ◽  
Waste To Energy ◽  
Methane Yield ◽  
Substrate Type

Anaerobic digestion is an efficient technology for a sustainable conversion of various organic wastes such as animal manure, municipal solid waste, agricultural residues and industrial waste into biogas. This technology offers a unique set of benefits, some of which include a good waste management technique, enhancement in the ecology of rural areas, improvement in health through a decrease of pathogens and optimization of the energy consumption of communities. The biogas produced through anaerobic digestion varies in composition, but it consists mainly of carbon dioxide methane together with a low quantity of trace gases. The variation in biogas composition are dependent on some factors namely the substrate type being digested, pH, operating temperature, organic loading rate, hydraulic retention time and digester design. However, the type of substrate used is of greater interest due to the direct dependency of microorganism activities on the nutritional composition of the substrate. Therefore, the aim of this review study is to provide a detailed analysis of the various types of organic wastes that have been used as a substrate for the sustainable production of biogas. Biogas formation from various substrates reported in the literature were investigated, an analysis and characterization of these substrates provided the pro and cons associated with each substrate. The findings obtained showed that the methane yield for all animal manure varied from 157 to 500 mL/gVS with goat and pig manure superseding the other animal manure whereas lignocellulose biomass varied from 160 to 212 mL/gVS. In addition, organic municipal solid waste and industrial waste showed methane yield in the ranges of 143–516 mL/gVS and 25–429 mL/gVS respectively. These variations in methane yield are primarily attributed to the nutritional composition of the various substrates.

Analysis of Dairy Manure and Food Manufacturing Waste as Feedstocks for Sustainable Energy Production via Anaerobic Digestion

2012 ◽  
Author(s):  
M. J. Rankin ◽  
T. A. Trabold ◽  
A. A. Williamson ◽  
M. Augustine
Keyword(s):  
Renewable Energy ◽  
Anaerobic Digestion ◽  
Liquid Phase ◽  
Organic Waste ◽  
New York State ◽  
Dairy Manure ◽  
Anaerobic Digester ◽  
Waste To Energy ◽  
Medium Size ◽  
Food Manufacturing

Anaerobic digestion is a waste-to-energy conversion process that offers potential economic and environmental benefits of organic waste diversion and renewable energy generation. However, these systems are often not feasible for small-to-medium size food processors, due to the significant capital investment involved. The key objective of this study is to identify the volume and composition of dairy manure and liquid-phase food manufacturing waste streams available in New York State (NYS) to make co-digestion of multiple feedstocks in centralized anaerobic digester facilities an economically attractive alternative. Organic waste volume and property data were obtained via Freedom of Information Law (FOIL) requests at the county and municipal levels for each of the 62 counties in NYS. Spatial analyses of dairy confined animal feeding operations (CAFO) locations relative to food manufacturing facility locations were analyzed using Microsoft MapPoint imaging software, which identified concentrations of high strength liquid-phase waste in the upstate corridor extending between Buffalo and Albany. The results show that if anaerobically digested, dairy CAFO manure and food manufacturing waste can contribute significantly to the State’s renewable energy portfolio. A laboratory scale two-phase anaerobic digester (bioDrillTS-AD200©) can help establish the correlation between waste properties (e.g. total solids, etc.) and quantity and quality of biogas produced.

Assessment and optimization of a decentralized food-waste-to-energy system with anaerobic digestion and CHP for energy utilization

2021 ◽  
Vol 228 ◽  
pp. 113654
Author(s):  
Jingxin Zhang ◽  
Danning Gu ◽  
Jiaqi Chen ◽  
Yiliang He ◽  
Yanjun Dai ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Energy System ◽  
Energy Utilization ◽  
Waste To Energy

Environmental impact and economic sustainability analysis of a novel anaerobic digestion waste-to-energy pilot plant in Pakistan

2019 ◽  
Vol 26 (25) ◽  
pp. 26404-26417 ◽  
Author(s):  
Rizwan Rasheed ◽  
Abdullah Yasar ◽  
Yubo Wang ◽  
Amtul Bari Tabinda ◽  
Sajid Rashid Ahmad ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Environmental Impact ◽  
Pilot Plant ◽  
Waste To Energy ◽  
Economic Sustainability ◽  
Sustainability Analysis

scholarly journals Response Surface Methodology to Optimize Methane Production from Mesophilic Anaerobic Co-Digestion of Oily-Biological Sludge and Sugarcane Bagasse

2020 ◽  
Vol 12 (5) ◽  
pp. 2116 ◽  
Author(s):  
Aiban Abdulhakim Saeed Ghaleb ◽  
Shamsul Rahman Mohamed Kutty ◽  
Yeek-Chia Ho ◽  
Ahmad Hussaini Jagaba ◽  
Azmatullah Noor ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Anaerobic Digestion ◽  
Response Surface ◽  
Sugarcane Bagasse ◽  
Organic Waste ◽  
Waste To Energy ◽  
Methane Yield ◽  
Digestion Process ◽  
Biological Sludge ◽  
Methane Bacteria

Oily-biological sludge (OBS) generated from petroleum refineries has high toxicity. Therefore, it needs an appropriate disposal method to reduce the negative impacts on the environment. The anaerobic co-digestion process is an effective method that manages and converts organic waste to energy. For effective anaerobic digestion, a co-substrate would be required to provide a suitable environment for anaerobic bacteria. In oily-biological sludge, the carbon/nitrogen (C/N) ratio and volatile solids (VS) content are very low. Therefore, it needs to be digested with organic waste that has a high C/N ratio and high VS content. This study investigates the use of sugarcane bagasse (SB) as an effective co-substrate due to its high C/N ratio and high VS content to improve the anaerobic co-digestion process with oily-biological sludge. The sugarcane bagasse also helps to delay the toxicity effect of the methane bacteria. Batch anaerobic co-digestion of oily-biological sludge was conducted with sugarcane bagasse as a co-substrate in twelve reactors with two-liter capacity, each under mesophilic conditions. The interaction effect of a C/N ratio of 20-30 and a VS co-substrate/VS inoculum ratio of 0.06-0.18 on the methane yield (mL CH4/g VSremoved) was investigated. Before the anaerobic digestion, thermochemical pre-treatment of the inoculum and co-substrate was conducted using sodium hydroxide to balance their acidic nature and provide a suitable pH environment for methane bacteria. Design and optimization for the mixing ratios were carried out by central composite design-response surface methodology (CCD-RSM). The highest predicted methane yield was found to be 63.52 mL CH4/g VSremoved, under optimum conditions (C/N ratio of 30 and co-substrate/inoculum ratio of 0.18).

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