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Friday, July 10, 2020

Plant- Microbial fuel cell: Generating electricity from green, living plants

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Charvi Trivedi
Charvi Trivedi
Western Europe

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Charvi Trivedi

Article Title

Plant- Microbial fuel cell: Generating electricity from green, living plants

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Global Views 360

Publication Date

July 10, 2020

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Marshland near Blythburgh. View over the tidal River Blyth

Marshland near Blythburgh. View over the tidal River Blyth  | Source:  Eileen Henderson via Wikimedia

Humans are capable of discovering and creating great things with the help of science and one such impressive discovery is that green, living plants can generate electricity. It may seem unbelievable, but not impossible.

One must be wondering how this technology works. Well, the answer is quite simple; photosynthesis. Plants excrete organic matter into the soil as a result of photosynthesis. Only some of the organic matter is used by plants and the rest is released in the soil. This released organic matter is broken down by bacteria. In the breakdown process, electrons are released as a waste product. Since the movement of electrons produces electricity, these electrons, which are of no use to the plant, can be harvested. The best part about this innovation is that the plants from which energy is being generated are not affected in any way.

This idea was first put into use by a Dutch start-up called Plant-e. This company was launched in September 2009 and is successful in launching and selling many environment- friendly products like DIY kits to the public for experimentation purposes and modular systems which could be easily installed on green roofs for abundant electricity production. Plant-e is involved in various projects, within The Netherlands, like automatic lighting systems in gardens and many more.

This technology works with the plants which thrive in moist soils and where the water is present in abundance. Therefore marshlands, paddy fields and deltas are some of the most suitable places for setting up plant batteries as a huge amount of water is present in those areas. Hence, the use of this technology is limited to certain geographic areas containing moist soils and cannot be used in arid regions. It may, however, promote the growth of more trees and plants which will gradually reverse the malicious effects of global warming.

Another obstacle in widespread adoption of this technology in today’s time is the high cost of installation of the system. The initial adopters of this technology are those who are attracted by the efficiency and eco-friendly nature of the plant batteries and willing to pay a premium for it.

The concept of plant batteries can be further taken into rural areas where most of the population still does not have access to adequate electricity. It is estimated that plant-MFC technology can cover upto 20% of European Union’s primary future electricity needs. Also, plants are almost 100% efficient at converting photons from sunlight into electrons which indicates a bright future for this technology. However, more research needs to be done in this field.

Another innovation in the field of green electricity is using algae , which often grows in ponds and rivers, for generating electricity. The basic concept which explains the working is similar to the way plants are able to produce electricity; photosynthesis.

Various other ventures in the field of renewable energy also include vegetable batteries, meaning, electric power generated from fruits and vegetables like lemons, tomatoes and potatoes, have been investigated. According to experiments, at least 3 to 4 vegetables are required just to light a small LED bulb. Moreover, it leads to poisoning of the vegetables and those food products need to be thrown away, without being useful for consumption purposes. It is therefore not a viable option for energy production.

Plant based electricity generation is still an evolving technology which has immense potential for producing energy in an environmentally sustainable way. It will realise full potential when the installation cost is attractive enough for the farmers to prefer it over the electricity grids or fossil fuel based personal electricity generator sets.

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February 4, 2021 4:47 PM

Kitchen Garden: An unusual arsenal in Kenya’s fight against malnutrition

Vegetable gardens have been in vogue since long across the world as a hobby to source  some fresh vegetables for household consumption. However in Kenya, the government and citizens both have moved towards taking it to the next level.

Hassani Oyo, a musician and resident of Nairobi, Kenya, has started vertical bag gardening in the backyard of his home to grow exotic vegetables like cabbage, spinach and kale for his own use as well as for sales to his neighbours and local vegetable vendors. This low cost method of gardening uses minimal farming space and very less water.

Another gardening story emerges from Busia County in western Kenya. where a local community-based organization, Sustainable Income Generating Investment (SINGI) is promoting the use of Kitchen Gardens. SINGI in partnership with other organizations are actively involved in training farmer groups about healthy agricultural practices and sharpening their production skills.

Roselida Orodi, the chairperson of Esikoma Ushirika Farmers Self Help Group states that, “Most households produce enough vegetables for domestic consumption with a surplus which is usually sold to the local market and beyond”. The biggest advantage is that these vegetables are able to withstand high temperatures. During summer, when the demand increases, they are usually sold for higher prices to earn good profits.

Jessica Muhonje of Singingire vegetable farmers group, says that she sells vegetables worth 15 U.S dollars per day. With indigenous vegetables gaining popularity, she adds that, “People flock to my homestead to purchase the vegetables”.

Kenyan government has also launched the “One Million Kitchen Gardens Plan” for households across the country. Brainchild of Agriculture Chief Administrative Secretary, Anne Nyaga, the program aims to use kitchen gardens as a tool to achieve food security, fight malnutrition, and to deal with the food crisis caused by the Covid-19 pandemic. In the initial phase kitchen garden kits were provided to 15,000 households of  Makueni county. “We would like to put emphasis on a balanced diet through these kits so that we can be able to boost our immunity and create an immunity that is able to fight COVID-19 and other diseases” says Anne Nyaga. She also adds, “The government is launching a campaign to establish kitchen vegetable gardens, we have issued guidelines to support both rural and urban dwellers with technologies for setting up within the resources available”.

These success stories inspire many others to join the kitchen garden bandwagon in Kenya. Setting up a kitchen garden is not tough, according to Mr. Oscar Ludelu, a landscaper and horticulturist. However, a few factors, like cost and what type of garden one needs is to be kept in mind before starting a kitchen garden.

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