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This fertilizer output is generated on a daily basis, and therefore is a highly productive by-product of anaerobic digestion. To produce biogas, organic matter ferments with the help of bacterial communities.

What is Biogas? A Beginners Guide

Four stages of fermentation move the organic material from their initial composition into their biogas state. In fact, the bacteria that break down organic material into biogas are some of the oldest multi-celled organisms on the planet. Soon after, John Dalton and Humphrey Davy clarified that this flammable gas was methane.

The first major anaerobic digestion plant dates back to in Bombay. Not long after, in , the UK used anaerobic digestion to convert sewage into biogas, which was then used to light street lamps. For the next century, anaerobic digestion was primarily used as a means to treat municipal wastewater. The goal was to decrease energy poverty in rural areas, and make cleaner cooking fuels more accessible in remote areas.

Anaerobic digesters

Close to one third of the global population still uses firewood and other biomass for energy, causing devastating health and environmental problems. Link to blog post on developing countries. Since then, family-sized biogas units are gaining more attention and popularity as both a means of reducing household waste and as a means of providing clean renewable energy to families throughout the world.

In the past 15 years, countries around the globe are adopting biogas programs to make both household biogas systems and larger anaerobic digestion plants accessible, efficient, and convenient. As landfills get illegally overloaded, and as the release of methane poses more worrying problems, the benefits of using biogas systems to convert waste into energy are increasingly more relevant and important.


Biogas can be produced with various types of organic matter, and therefore there are several types of models for biogas digesters. Some industrial systems are designed to treat: municipal wastewater, industrial wastewater, municipal solid waste, and agricultural waste. Small-scale systems are typically used for digesting animal waste. And newer family-size systems are designed to digest food waste.

how to make Free Gas from KITCHEN WASTE - mini bio gas plant - 100% free energy.

The resulting biogas can be used in several ways including: gas, electricity, heat, and transportation fuels. For example, in Sweden hundreds of cars and buses run on refined biogas. The biogas in Sweden is produced primarily from sewage treatment plants and landfills. Another example of the diversified uses of biogas is the First Milk plant. New anaerobic digestion plants like these with fascinating stories keep popping up every day!

Small-scale, or family-size biogas digesters are most frequently found in India and China. As the modern world is producing more and more waste, individuals are eager to find ecologic ways to treat their trash. Traditional systems typically found in India and China focus on animal waste.


Biogas for rural Households – myclimate

Due to a lack of energy in rural areas combined with a surplus of animal manure, biogas digesters are very popular, useful, and even life-changing. In many developing countries, biogas digesters are even subsidized and advocated by the government and local ministries, who see the variety of benefits produced from using biogas. In addition to having a clean renewable energy provide gas in the kitchen, many families make extensive use of the fertilizer by-product that biogas digesters provide.

In African countries, some biogas users even turn a profit by selling the bio-slurry by-product produced by biogas systems. This bio-slurry is different from the liquid fertilizer that is produced daily. Bio-slurry refers to the most decomposed stage of the organic matter, after it has been broken down in the system.

Municipal Solid Waste

Bio-slurry sinks to the bottom of the biogas system, and with the help of modern units like HomeBiogas, is easily emptied out once accrued usually an annual process. This bio-slurry is in fact a nutrient-dense sludge that provides lots of benefits to soil, and can increase productivity of vegetable gardens. As the application and efficiency grows, biogas can make a significant impact on reducing greenhouse gases.

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As a clean source of energy and a renewable means of treating organic waste, biogas is applicable both in under-developed and industrialized countries. What is Biogas? A Beginners Guide. Biogas Digesters As opposed to letting methane gas release to the atmosphere, biogas digesters are the systems that process waste into biogas, and then channel that biogas so that the energy can be productively used.

All-Natural Fertilizer Because the organic material decomposes in a liquid environment, nutrients present in the waste dissolve into the water, and create a nutrient-rich sludge, typically used as fertilizer for plants. In this form, biomethane is suitable for injection into the gas network or used as a vehicle fuel. Ramboll has been involved in pre-construction planning, design and inspection of a significant number of vehicle fuelling stations.

This is equivalent to GWh; enough energy to provide heat and electricity to 4, households. Alternatively, , homes can be supplied with heat and electricity from biogas generated from 8 million tonnes of organic waste.

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Our services after the pre-study stage cover the entire project cycle from preliminary design, permit applications and EIAs to final design, tendering, supervision, commissioning and performance tests. We also perform periodical inspections and analysis of risks and operational safety. View our Anaerobic Digestion and Biogas capability statement online publication, opens in new window.

View our Biogas Distribution capability statement. In Oslo, both solid and liquid waste has since commissioning in been delivered to the Romerike Biogas plant RBA for pre-treatment. Now, Ramboll has been appointed by the city of Oslo to optimize the existing plant design and processes in order to obtain a more resilient facility and biogas production. Construction of a new gas filling station for the supply of biomethane as a vehicle fuel and LNG backup storage.

Norway's largest biogas upgrading plant set to deliver vehicle fuel. In South Denmark a large-scale biogas plant is under development. The plant will treat liquid manure, household waste and energy crops from farmers, and Ramboll advises on design and approval.

Bright ideas. Sustainable change. Middle East. Southern Africa.