Environmental aspects of the anaerobic digestion of the organic fraction of municipal solid wastes and of solid agricultural wastes

2005 ◽  
Vol 52 (1-2) ◽  
pp. 203-208 ◽  
Author(s):  
W. Edelmann ◽  
U. Baier ◽  
H. Engeli
Keyword(s):  
Anaerobic Digestion ◽  
Waste Treatment ◽  
Solid Wastes ◽  
Gaseous Emissions ◽  
Negative Effects ◽  
Municipal Solid Wastes ◽  
Life Cycle Assessments ◽  
Organic Solid ◽  
Biogenic Waste

In order to obtain more detailed information for better decision making in future biogenic waste treatment, different processes to treat biogenic wastes in plants with a treatment capacity of 10,000 tons of organic household wastes per year as well as agricultural codigestion plants were compared by life cycle assessments (LCA). With the tool EcoIndicator, anaerobic digestion is shown to be advantageous as compared to composting, incineration or a combination of digestion and composting, mainly because of a better energy balance. The management of the liquid manure in agricultural codigestion of organic solid wastes causes increased gaseous emissions, which have negative effects on the LCA, however. It is recommended to cover the slurry pit and to use an improved manure management in order to compensate for the additional gaseous emissions. In the LCAs, the quality of the digester output could only be taken into account to a small extent; the reasons are discussed.

Dry anaerobic digestion of differently sorted organic municipal solid waste: a full-scale experience

2006 ◽  
Vol 53 (8) ◽  
pp. 23-32 ◽  
Author(s):  
D. Bolzonella ◽  
P. Pavan ◽  
S. Mace ◽  
F. Cecchi
Keyword(s):  
Anaerobic Digestion ◽  
Methane Production ◽  
Organic Wastes ◽  
Full Scale ◽  
Solid Wastes ◽  
Municipal Solid Wastes ◽  
Operational Conditions ◽  
Organic Solid ◽  
Green Certificates ◽  
Dry Anaerobic Digestion

This paper presents a comparison of dry anaerobic digestion reactors fed with differently sorted municipal organic solid wastes. One reactor was fed with source sorted organic wastes and a second reactor was fed with mixed organic wastes consisting of grey wastes, mechanically selected municipal solid wastes and sludge. The two reactors utilised the same process (Valorga) and operational conditions at full scale. The results of the study emphasise the influence of the kind of treated material on the process performances, especially in terms of biogas and methane production, thus, energy reclamation. The reactor treating the source sorted organic waste and the reactor treating the mixed organic wastes generated some 200 m3 and 60 m3 of biogas per ton of waste treated, respectively, while the specific methane production was some 0.40 and 0.13 m3CH4/kgTVS, respectively. The mass balance and the final fate of the digested material from the two reactors were also clearly different. As for the costs, these were some 29 € per ton of treated waste (50% for personnel) and 53 €/ton for disposing of the rejected materials. Incomes were some 100 €/ton (on average) and an other 15 €/ton came from green certificates. The initial investment was 16 million Euros.

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.

Ecological, energetic and economic comparison of anaerobic digestion with different competing technologies to treat biogenic wastes

2000 ◽  
Vol 41 (3) ◽  
pp. 263-273 ◽  
Author(s):  
W. Edelmann ◽  
K. Schleiss ◽  
A. Joss
Keyword(s):  
Decision Making ◽  
Life Cycle ◽  
Anaerobic Digestion ◽  
Waste Treatment ◽  
Life Cycle Assessments ◽  
Biogenic Waste ◽  
Professional Treatment ◽  
Economic Considerations ◽  
Economic Comparison ◽  
Competing Technologies

In order to get more detailed information for better decision making in future biogenic waste treatment, different processes to treat biogenic wastes in plants with a treating capacity of 10,000 tons of organic household wastes per year were compared. The comparison included life cycle assessments as well as economic considerations for different treating methods. Measurements on compost plants showed that methane emissions are higher than estimated so far. With the tools ECOINDICATOR and UBP anaerobic digestion shows to be advantageous as compared to composting, incineration or combination of digestion and composting, mainly because of a better energy balance. In fully enclosed, professional treatment plants, the specific biotechnological treatment costs are in the range of about 150.-sFr/ton for aerobic, anaerobic and combined technologies. It can be concluded, that anaerobic processes will become considerably more important in the future mainly for ecological reasons.

scholarly journals Improving the Quantity and Quality of Biogas Production in Tehran Anaerobic Digestion Power Plant by Application of Materials Recirculation Technique

2020 ◽  
Vol 9 (2) ◽  
pp. 167-175
Author(s):  
Reza Naghavi ◽  
Mohammad Ali Abdoli ◽  
Abdolreza Karbasi ◽  
Mehrdad Adl
Keyword(s):  
Anaerobic Digestion ◽  
Power Plant ◽  
Fossil Fuels ◽  
Biogas Production ◽  
Solid Wastes ◽  
High Concentration ◽  
Urban District ◽  
Organic Solid ◽  
Organic Solid Wastes

Tehran anaerobic digestion power plant has been built on the eastern margin of the urban district by the purpose of processing the organic fraction of municipal solid waste. One of the most suitable methods for the treatment of organic matter is the use of anaerobic digestion (AD) process, which in addition to significant reduction of organic solid wastes, will produce valuable energy. Contributing to maintain the environment, improve urban health, saving on fossil fuels and producing rich fertilizer for agricultural use are important advantages of anaerobic digestion. The plant has been set up in 2014 with a nominal acceptance capacity of 300 tons of organic solid wastes per day and the nominal power generation of 2000 kWe. This system has been faced with considerable challenges in terms of quantity and quality of biogas during operation. The high concentration of hydrogen sulfide (H2S) in produced biogas and the lack of appropriate technologies in the plant for biogas refining are critical for the biogas generator engine deployed in the complex. The purpose of this article is to investigate the factors affecting the quality and quantity of Tehran's AD plant biogas using various H2S reduction approaches and selection of appropriate implementing technologies. The results showed that the recirculation of the digester slurry increased the methane content by more than 30% and reduced H2S by more than 98%.©2020. CBIORE-IJRED. All rights reserved

scholarly journals A review on strategies to optimize metabolic stages of anaerobic digestion of municipal solid wastes towards enhanced resources recovery

2019 ◽  
Vol 29 (1) ◽  
Author(s):  
Edwin N. Richard ◽  
Askwar Hilonga ◽  
Revocatus L. Machunda ◽  
Karoli N. Njau
Keyword(s):  
Fatty Acids ◽  
Trace Elements ◽  
Activated Carbon ◽  
Anaerobic Digestion ◽  
Volatile Fatty Acids ◽  
Solid Wastes ◽  
Municipal Solid Wastes ◽  
Ammonia Inhibition ◽  
Moisture Contents ◽  
Pre Treatment

AbstractRecently, there are increased efforts by municipals and researchers to investigate the potential of utilizing municipal solid wastes (MSW) for resources recovery. In many parts of developing countries, MSW is mostly collected for disposal with little emphasis on resources recovery. However, the MSW has high organic and moisture contents, and are suitable substrates for anaerobic digestion (AD) process to recover biogas for energy and digestate which can be used as fertilizers or for soil amendments. Resources recovery from the AD process consists of four metabolic stages; hydrolysis, acidogenesis, acetogenesis, and methanogenesis. These metabolic stages can be affected by several factors such as the nature of substrates, accumulation of volatile fatty acids, and ammonia inhibition. In this review, different optimization strategies towards resources recoveries such as pre-treatment, co-digestion, trace elements supplementation, optimization of key parameters and the use of granular activated carbon are discussed. The review reveals that the currently employed optimization strategies fall short in several ways and proposes the need for improvements.

scholarly journals Impact of pH Management Interval on Biohydrogen Production from Organic Fraction of Municipal Solid Wastes by Mesophilic Thermophilic Anaerobic Codigestion

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Chaudhry Arslan ◽  
Asma Sattar ◽  
Ji Changying ◽  
Abdul Nasir ◽  
Irshad Ali Mari ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Solid Wastes ◽  
Biohydrogen Production ◽  
Organic Fraction ◽  
Municipal Solid Wastes ◽  
Anaerobic Codigestion ◽  
Ph Management

The biohydrogen productions from the organic fraction of municipal solid wastes (OFMSW) were studied under pH management intervals of 12 h (PM12) and 24 h (PM24) for temperature of37±0.1°C and55±0.1°C. The OFMSW or food waste (FW) along with its two components, noodle waste (NW) and rice waste (RW), was codigested with sludge to estimate the potential of biohydrogen production. The biohydrogen production was higher in all reactors under PM12 as compared to PM24. The drop in pH from 7 to 5.3 was observed to be appropriate for biohydrogen production via mesophilic codigestion of noodle waste with the highest biohydrogen yield of 145.93 mL/gCODremovedunder PM12. When the temperature was increased from 37°C to 55°C and pH management interval was reduced from 24 h to 12 h, the biohydrogen yields were also changed from 39.21 mL/gCODremovedto 89.67 mL/gCODremoved, 91.77 mL/gCODremovedto 145.93 mL/gCODremoved, and 15.36 mL/gCODremovedto 117.62 mL/gCODremovedfor FW, NW, and RW, respectively. The drop in pH and VFA production was better controlled under PM12 as compared to PM24. Overall, PM12 was found to be an effective mean for biohydrogen production through anaerobic digestion of food waste.

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