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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 5:04 PM

Yemen's Multilayered War: Al Qaeda in Arab Peninsula

This is the 4th part of a short explainer article series on the current crisis in Yemen. To read the earlier parts of the series click on the following links.

To read the 1st part of the series click on the link.

To read the 2nd part of the series click on the link.

To read the 3rd part of the series click on the link.

The unification of Yemen in 1990 was a direct result of the military defeat of South Yemen at the hand of North Yemen forces. This military defeat and coerced unification implied that Unified Yemen could not achieve real cohesion, preventing the functioning of the nation as a democratic unit.

Meanwhile, newer elements were added to the dangerous mix of sub-nationalism, intra religious division, and tribal loyalty in Yemen. These were the Yemeni veterans of Soviet-Afghan war who fought with the Afghan mujahideen against the Soviet army backing the Afghan government.

These were hardline Wahabi and Salafi fighters, following an idealogy that mandated a strict interpretation of Islam. The fighters returned to Yemen in the early 1990s, after the withdrawal of Soviet forces from Afghanistan. The local Yemeni, both the Zaidi Shias or Maliki Sunni have traditionally followed a more liberal version of Islamic and social practices. Unlike the local Sunnis who were living in peaceful coexistence with the Zaidis Shia, these hardliners were antagonistic to the Shias.

Their arrival was followed by a forceful realignment of the local residents’ religious practices, mandating the local population to strict interpretations and social practices. Osama bin Laden, who had family roots in Yemen, was a conveniently placed ideological mentor. This led to a pushback from both the government forces as well as Shia groups, especially the Houthi-led Ansar Allah movement. In time, these former mujahideen, who were battle hardened and well versed in guerilla warfare, allied themselves with Al-Qaeda to start a low level insurgency in Yemen.

The Gulf war and subsequent stationing of American forces in Saudi Arabia and other gulf countries provided another impetus for the growth of Al Qaeda in Yemen. Consequently, they demanded that coalition forces leave Arabian land, failing which would result in more terror attacks.

Al-Qaeda affiliated groups attacked many installations associated with the US-led coalition forces in Yemen and nearby countries. The most successful of those was the famous bombing of USS Cole in Aden, in 2000. It was followed by a series of attacks leading up to  9/11.

Al-Qaeda in the Arab Peninsula (AQAP) is also known as the Ansar al-Sharia in Yemen is fighting to set up an emirate amidst the lack of leadership post the Houthi rebellion. It was this outfit that claimed responsibility for the attack on the French satirical magazine, Charlie Hebdo, in 2015 and is now considered the most dangerous al-Qaeda outfit by the US.

The CNN reported that “AQAP set out its objectives in a May 2010 statement as the "expulsion of Jews and crusaders" from the Arabian Peninsula, the re-establishment of the Islamic caliphate, the introduction of Sharia, or Islamic law, and the liberation of Muslim lands.”

The full list of attacks and places captured by terrorist insurgents in chronological order can be accessed here.

One of the outcomes of continual terrorist attacks has been a reduction in Hadi’s popularity. He is also seen as weak for not being able to stop al-Qaeda from terrorising Southern Yemen, as well as for not being able to alleviate them from their feeling of marginalization ever since the unification.

To read the 5th part of the series click on the link.

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