May 17, 2020

Mexico City Closes Gigantic Dump

energy digital
Mexico City
world's largest dump
2 min
Waste from millions will be recycled and turned into energy
Mexico City will close one of the world's largest dumps and instead turn its waste into reusable materials and energy by the end of December, acco...


Mexico City will close one of the world's largest dumps and instead turn its waste into reusable materials and energy by the end of December, according to Mayor Marcelo Ebrard. The city will institute a new recycling program for nearly all forms of trash and embark on a major project to harness methane gas to be used to produce energy.

As of Monday, all 700 trucks that carry garbage to the Bordo Poniente dump will stop hauling in waste and instead be used to help move it into a recycling separation and composting plant on site. A new plant will open for recycling construction waste into building material and the city will start working with the 1,500 pepenadores, or scavengers, who had informally worked at the dump to resell material. Other smaller dumps are expected to open to manage remaining waste.

Concrete giant Cemex SAB has already agreed to purchase some 3,000 tons of waste daily to turn into energy, according to government undersecretary Juan Jose Garcia Ochoa.


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Over its lifetime, Bordo Poniente has accumulated over 76 million tons of trash. Closing its operations is expected to reduce greenhouse gas emissions by at least 2 million tons of carbon dioxide per year.

Through recycling and composting programs, the city has already cut its annual waste in half in the last year. By adopting strict laws to prohibit illegal dumping at the site, the changes in the next year are expected to be even more monumental.

One of the world's worst waste management systems will now become one of the greenest.


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Jul 30, 2021

Major move forward for UK’s nascent marine energy sector

3 min
The UK’s nascent marine energy sector starts exporting electricity to the grid as the most powerful tidal turbine in the world begins to generate power

Although the industry is small and the technologies are limited, marine-based energy systems look to be taking off as “the world’s most powerful tidal turbine” begins grid-connected power generation at the European Marine Energy Centre

At around 74 metres long, the turbine single-handedly holds the potential to supply the annual electricity demand to approximately 2,000 homes within the UK and offset 2,200 tonnes of CO2 per year.

Orbital Marine Power, a privately held Scottish-based company, announced the turbine is set to operate for around 15 years in the waters surrounding Orkney, Scotland, where the 2-megawatt O2 turbine weighing around 680 metric tons will be linked to a local on-land electricity network via a subsea cable. 

How optimistic is the outlook for the UK’s turbine bid?

Described as a “major milestone for O2” by CEO of Orbital Marine Power Andrew Scott, the turbine will also supply additional power to generate ‘green hydrogen’ through the use of a land-based electrolyser in the hopes it will demonstrate the “decarbonisation of wider energy requirements.” 

“Our vision is that this project is the trigger to the harnessing of tidal stream resources around the world to play a role in tackling climate change whilst creating a new, low-carbon industrial sector,” says Scott in a statement. 

The Scottish Government has awarded £3.4 million through the Saltire Tidal Energy Challenge Fund to support the project’s construction, while public lenders also contributed to the financial requirements of the tidal turbine through the ethical investment platform Abundance Investment.

“The deployment of Orbital Marine Power’s O2, the world’s most powerful tidal turbine, is a proud moment for Scotland and a significant milestone in our journey to net zero,” says Michael Matheson, the Cabinet Secretary for Net-Zero, Energy and Transport for the Scottish Government. 

“With our abundant natural resources, expertise and ambition, Scotland is ideally placed to harness the enormous global market for marine energy whilst helping deliver a net-zero economy.

“That’s why the Scottish Government has consistently supported the marine energy sector for over 10 years.”

However, Orbital Marine CEO Scott believes there’s potential to commercialise the technology being used in the project with the prospect of working towards more efficient and advanced marine energy projects in the future. 

We believe pioneering our vision in the UK can deliver on a broad spectrum of political initiatives across net-zero, levelling up and building back better at the same time as demonstrating global leadership in the area of low carbon innovation that is essential to creating a more sustainable future for the generations to come.” 

The UK’s growing marine energy endeavours

This latest tidal turbine project isn’t a first for marine energy in the UK. The Port of London Authority permitted the River Thames to become a temporary home for trials into tidal energy technology and, more recently, a research project spanning the course of a year is set to focus on the potential tidal, wave, and floating wind technology holds for the future efficiency of renewable energy. The research is due to take place off of the Southwest coast of England on the Isles of Scilly

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