scholarly journals Comparison of Potential Environmental Impacts and Waste-to-Energy Efficiency for Kitchen Waste Treatment Scenarios in Central Taiwan

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 696
Author(s):  
Meng-Fen Shih ◽  
Chiu-Yue Lin ◽  
Chyi-How Lay
Keyword(s):  
Anaerobic Digestion ◽  
Electricity Generation ◽  
Waste Treatment ◽  
Electricity Consumption ◽  
Waste Recycling ◽  
Economic Feasibility ◽  
Waste To Energy ◽  
Kitchen Waste ◽  
Central Taiwan ◽  
Solid Waste Recycling

Taiwan has a sound solid waste recycling system, and waste-to-energy is attractive under the encouragement policy and economic feasibility, especially in central and southern regions with vast agricultural wastes. The four scenarios evaluated in this study relating to current use or under consideration for kitchen waste treatment strategy in Taiwan were incineration, landfill, composting, and anaerobic digestion. These scenarios were compared through life cycle assessment to obtain the most preferable treatment solution. The analysis was based on a functional unit, i.e., 1 metric ton of kitchen waste treated, and considered all impact categories through the CML_IA baseline 2000 method. It has shown that energy recovery had enormous effects on all scenarios with the anaerobic digestion having the highest environmental performance change. A comparison between actual electricity consumption and estimated electricity generation by kitchen waste treatment through anaerobic digestion indicates that decentralized electricity generation was suitable for central Taiwan and could be considered as the energy solution in a short-term context. This study provides an experience in selecting a proper waste-to-energy method with the most negligible environmental impact.

Study on Solid-State Anaerobic Co-Digestion with Distiller’s Grains and Food Waste for Methane Production

2012 ◽  
Vol 485 ◽  
pp. 306-309
Author(s):  
Li Hong Wang ◽  
Qun Hui Wang ◽  
Wei Wei Cai
Keyword(s):  
Anaerobic Digestion ◽  
Solid State ◽  
Synergistic Effect ◽  
Food Waste ◽  
Methane Production ◽  
Waste Treatment ◽  
Biogas Production ◽  
Methane Yield ◽  
Kitchen Waste ◽  
Distiller's Grains

Solid-state anaerobic digestion (SSAD) of distiller’s grains (DG) and kitchen waste (KW) for biogas was investigated. Six DG to KW ratios of 10/1, 8/1, 6/1, 4/1, 1/0, and 0/1 was used. The results showed that in 48 digestion days the co-digestion with DG to KW ratio of 8:1 obtained the highest methane yield of 159.74mL/gTS, TS and VS reductions of 58.7% and 71.8%, hemicellulase, cellulose and lignin reductions of 46.7%, 45.4% and 4.0%. Compared to mono-digestions of DG or KW, co-digestion of DG and FW had a good synergistic effect. It indicated that SSAD of cellulosic-based waste and food waste could be one of the options for efficient biogas production and waste treatment

scholarly journals Municipal Waste Management Strategy Review and Waste-to-Energy Potentials in New Zealand

2018 ◽  
Vol 10 (9) ◽  
pp. 3114 ◽  
Author(s):  
Jean-François Perrot ◽  
Alison Subiantoro
Keyword(s):  
New Zealand ◽  
Anaerobic Digestion ◽  
Waste Management ◽  
Management Strategy ◽  
Production Efficiency ◽  
Waste Treatment ◽  
Municipal Waste ◽  
Waste To Energy ◽  
Municipal Waste Management ◽  
Waste Energy

Municipal waste management and Waste-to-Energy (WtE) potentials in New Zealand are discussed. The existing main waste management strategy of New Zealand is to reduce, reuse and recycle waste. Most of the remaining waste is currently disposed of in landfills. WtE options were explored in this study as a more sustainable waste treatment alternative in the country, while making use of the annual 30.8 petajoule of available waste energy in New Zealand. Four WtE technology options were discussed and compared, namely incineration, anaerobic digestion, gasification and pyrolysis. The aspects in comparison were air pollution, cost, side products, capacity, commercial maturity, energy efficiency and type of waste treated. Special emphasis was given to environment-friendliness and cost. From the comparison, it was found that anaerobic digestion seems to be the most attractive solution for the country as it is environment-friendly, economical and the concept is consistent with New Zealand’s existing waste management strategy. The major limitations of anaerobic digestion are its low energy production efficiency and its limited waste treatment capacity. Hence, an effective national waste reduction and recycling strategy is crucial for the success of this waste management option.

scholarly journals Anaerobic Digestion for Producing Renewable Energy—The Evolution of This Technology in a New Uncertain Scenario

Entropy ◽  
2021 ◽  
Vol 23 (2) ◽  
pp. 145
Author(s):  
Cristián Arenas Sevillano ◽  
Alby Aguilar Pesantes ◽  
Elizabeth Peña Carpio ◽  
Elia J. Martínez ◽  
Xiomar Gómez
Keyword(s):  
Anaerobic Digestion ◽  
Biological Treatment ◽  
Waste Treatment ◽  
High Strength ◽  
Transformation Process ◽  
Economic Feasibility ◽  
Fiscal Incentives ◽  
Chemical Products ◽  
Green Chemicals ◽  
By Products

Anaerobic digestion is a well-known technology with wide application in the treatment of high-strength organic wastes. The economic feasibility of this type of installation is usually attained thanks to the availability of fiscal incentives. In this review, an analysis of the different factors associated with this biological treatment and a description of alternatives available in literature for increasing performance of the process were provided. The possible integration of this process into a biorefinery as a way for producing energy and chemical products from the conversion of wastes and biomass also analyzed. The future outlook of anaerobic digestion will be closely linked to circular economy principles. Therefore, this technology should be properly integrated into any production system where energy can be recovered from organics. Digestion can play a major role in any transformation process where by-products need further stabilization or it can be the central core of any waste treatment process, modifying the current scheme by a concatenation of several activities with the aim of increasing the efficiency of the conversion. Thus, current plants dedicated to the treatment of wastewaters, animal manures, or food wastes can become specialized centers for producing bio-energy and green chemicals. However, high installation costs, feedstock dispersion and market distortions were recognized as the main parameters negatively affecting these alternatives.

scholarly journals Energy from municipal solid wastes: Galati city case study

2020 ◽  
Vol 207 ◽  
pp. 02001
Author(s):  
Bogdan Gabriel Carp ◽  
Gabriel Mocanu ◽  
Ion V. Ion ◽  
Florin Popescu
Keyword(s):  
Anaerobic Digestion ◽  
Waste Treatment ◽  
Landfill Gas ◽  
Electrical Energy ◽  
Appropriate Technology ◽  
Solid Wastes ◽  
Waste To Energy ◽  
City Region ◽  
Municipal Solid Wastes ◽  
Electrical Energy Production

The municipal solid wastes (MSW) can be turned into resources through recycling and energy recovery. To obtain the maximum amount of energy, the appropriate technology must be applied to waste treatment. The composition and characteristics of municipal solid wastes are determinant for technologies choice for MSW in a city/region. Municipal authorities from the Galati city proposed a recovery rate of recyclable materials of 60% from MSW and treatment of the post-recycling MSW as follow: biodegradable fraction by anaerobic digestion and the combustible fraction by incineration or gasification. In this study traditional and innovative waste to energy technologies have been analysed and the potential of electrical energy of waste has been estimated. Results show that plasma gasification system of raw MSW coupled with gas turbine engine has almost the same electrical energy production (32.92 GWh/year) as conventional gasification of combustible material from MSW (17.21GWh/year) coupled with anaerobic digestion of organic fraction of MSW (11.65 GWh/year). By recovering and using the landfill gas from the Tirighina landfill, 6.68 GWh of electricity can be produced annually.

scholarly journals Sustained municipal waste management models in Russian megapolicies through utilizing waste-to-energy technologies

2018 ◽  
Vol 193 ◽  
pp. 02039 ◽  
Author(s):  
Arsalan Asadpoori ◽  
Candido Ankomah ◽  
Ardalan Asadpoori ◽  
Oleg Derevianko ◽  
Evgenii Shaburov
Keyword(s):  
Waste Management ◽  
Management System ◽  
Electricity Generation ◽  
Electricity Consumption ◽  
Decision Makers ◽  
Municipal Waste ◽  
Waste To Energy ◽  
Waste Generation ◽  
Waste Management System ◽  
Energy Technologies

St. Petersburg, as the second most important Russian city in Russia is facing with waste related problems which requires taking immediate actions. The excessive diurnal volume of municipal waste generation and insufficient waste management system ring the bells to warn the decision makers. Focusing on problems, insufficiencies and opportunities of the waste management system, the paper goes through the evaluation of details of the dominant situation in St. Petersburg and two models are introduced to improve the system. At the end, an estimation of biofuel, heat and electricity generation will be provided for four incineration facility installments with design capacity of each 315,000 tons of waste per day. It will be shown that the contributing share of bioconversion processes is significant and an acceptable portion of 8% of annual electricity consumption can be supplied via those processes as well as production of 477 million liters of ethanol.

Two-Stage anaerobic digestion in agroindustrial waste treatment: A review

2021 ◽  
Vol 281 ◽  
pp. 111854
Author(s):  
Paulo André Cremonez ◽  
Joel Gustavo Teleken ◽  
Thompson Ricardo Weiser Meier ◽  
Helton José Alves
Keyword(s):  
Anaerobic Digestion ◽  
Waste Treatment ◽  
Two Stage ◽  
Agroindustrial Waste

scholarly journals Enhancement of Food Waste Management and Its Environmental Consequences

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1790
Author(s):  
Jan den Boer ◽  
Gudrun Obersteiner ◽  
Sebastian Gollnow ◽  
Emilia den Boer ◽  
Renata Bodnárné Sándor
Keyword(s):  
Anaerobic Digestion ◽  
Waste Management ◽  
Environmental Effects ◽  
Ghg Emissions ◽  
Primary Energy ◽  
Biological Pretreatment ◽  
Environmental Benefit ◽  
Kitchen Waste ◽  
Considerable Saving ◽  
Positive Effects

This paper assesses the potential environmental effects of the optimization of the kitchen waste management in Opole. The separate collection of kitchen waste is improved by distribution of separate collection kits consisting of an in-home bin and 10 L biodegradable bags. The surplus of collected kitchen waste is diverted from treatment in a mechanical-biological pretreatment (MBP) along with the residual waste to anaerobic digestion (AD) with the biowaste. This has positive effects on European and Polish goals, ambitions, and targets, such as (i) increasing the level of renewables in the primary energy supply, (ii) decreasing the level of greenhouse gas (GHG) emissions, (iii) increasing the level of preparation for reuse and recycling of municipal waste. The environmental effects of 1 ton additionally separately collected and treated kitchen waste are determined by using life cycle assessment. It was shown that in all selected impact categories (global warming potential, marine eutrophication potential, acidification potential, and ozone depletion potential) a clear environmental benefit can be achieved. These benefits are mainly caused by the avoided emissions of electricity and heat from the Polish production mix, which are substituted by energy generation from biogas combustion. Optimization of the waste management system by diversion of kitchen waste from mechanical-biological pretreatment to anaerobic digestion can lead to considerable saving of 448 kg CO2-eq/t of waste diverted. With an estimated optimization potential for the demonstration site of 40 kg/inh·year for the city of Opole, this would lead to 680,000 t CO2-eq savings per year for the whole of Poland. The sensitivity analysis showed that with a choice for cleaner energy sources the results would, albeit lower, show a significant savings potential.

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