Displaying items by tag: Waste

Slovakia: Slovak cement plants recovered 374,000t of alternative fuels made from waste in 2024, replacing 75% of heat from fossil fuels, according to the Cement Manufacturers Association (ZVC) of the Slovak Republic. This has reportedly saved almost 230,000t of coal and reduced the cement plants’ carbon footprint.

Director of ZVC Rudolf Mackovic said “Instead of waste, such as non-recyclable plastics, being deposited in landfills without being used, it is processed into fuel in processing plants. Such an alternative fuel meets strict quality and ecological parameters.”

Canada: Progressive Planet has secured up to US$3.2m in funding from Sustainable Development Technology Canada (SDTC) to support the construction of a pilot plant for PozGlass, its low-carbon supplementary cementitious material (SCM) made from post-consumer glass. The funding will be distributed over four years, with the first tranche of US$1m received on 31 January 2025.

"PozGlass is our solution to reducing the carbon footprint of cement production. This funding allows us to innovate, reduce emissions and create value from post-consumer glass, a material that has been historically misallocated and considered waste," said Progressive Planet CEO Steve Harpur.

Progressive Planet signed a purchase agreement with Lafarge Canada in June 2023 for all PozGlass produced at the pilot plant, up to a maximum of 3500t/yr. Under the agreement, Lafarge Canada will provide technical guidance and support for the plant’s design, construction and operation.

Kenya: At least 99kg of heroin and cocaine worth US$2.3m were destroyed at the Bamburi Cement Mombasa plant, at the request of the Directorate of Criminal Investigations Kenya, according to a social media post from the company. Bamburi Cement’s kiln was selected as the most secure method for incinerating the seized narcotics.

“Our kilns co-process waste and convert it into energy, reducing CO₂ emissions and supporting a clean circular economy. We are proud to contribute to this public interest solution that has eliminated a threat posed to our fellow Kenyans,” said Sustainability & Geocycle Director Jane Wangari.

Bamburi Cement has previously collaborated with multi-agency teams to dispose of over 5000t of hazardous waste imported into the country at its Mombasa facility.

India: Around 67t of non-recyclable materials collected from the city of Ernakulam have been sent to cement plants as refuse-derived fuel (RDF) for the plant’s processes, according to October 2024 estimates. 36t/day of materials from local bodies and an additional 27t/day from Clean Kerala Company facilities are handed over to cement plants, with private facilities contributing 3.9t. The waste generated in households and commercial establishments was sorted at material collection facilities and resource recovery units managed by local bodies, before being used for energy generation in cement manufacturing. Haritha Karma Sena volunteers manage the collection of non-biodegradable materials from households and shops, directing these materials to nearly 15 cement plants across Tamil Nadu, Andhra Pradesh and Gujarat for co-processing.

Nigeria: Lafarge Africa has launched a new alternative fuel and raw material (AFR) platform at its Mfamosing cement plant in Cross River State, with the aim to reduce its CO₂ emissions. The facility will replace traditional fossil fuels with alternative energy sources derived from non-recyclable materials, according to the Nigerian Tribune.

Georgia: Hunnewell Cement, a subsidiary of HeidelbergCement Georgia, has launched a new project to use tyres as an alternative fuel at its Kaspi cement plant, with support from the Georgian government. The project has a budget of US$2.1m, and is expected to create additional job opportunities. It marks a shift from the use of coal and natural gas at the plant, to ‘significantly’ reduce environmental impact and contribute to sustainable development.

Economy minister Levan Davitashvili said "Our goal is to minimise environmental pollution from ‘waste’ while promoting economic development and creating added value.”

Germany: The University of Trier is transforming post-consumer materials into ‘ecological’ cement through a new research project that aims to find sustainable alternatives for the construction industry. The project involves using low-CO₂ industrial post-consumer materials as alternative cement binders, such as sludge from gravel and sand mining, as well as dust from quartzite extraction. The research will run for two years and is supported by the German Federal Environment Foundation.

Mexico: Regenera, a subsidiary of Cemex, has launched a pilot project at its Broquers Ambiental plant in Querétaro to transform the city’s organic waste into alternative fuel using a drying process known as ‘biosecado’. This initiative makes Querétaro the first zero waste municipality in Mexico, according to the company. The plant now processes almost 90% of the municipality’s waste, transforming over 8000t monthly into biomass to reduce the amount of material sent to landfill.

Vice president of urban solutions at Cemex Mexico, Antonio Balmori, said "This project that we started today at our Broquers Ambiental plant excites me very much because it will take the city of Querétaro to the next level in waste management, where we will seek to take advantage of 100% of the urban solid waste generated in the municipality."

Oman: Oman's solid waste management entity, Be'ah, has reported progress in its strategy to transition solid waste from landfill disposal to refuse derived fuel (RDF), according to Oman Daily Observer.

In 2023, Be'ah launched initiatives focusing on transforming waste into RDF, electrical and electronic waste and green waste. The company has signed an agreement with Oman Cement Company to provide tyre derived fuel for its energy needs, eventually expanding to include RDF. A memorandum of understanding (MoU) was signed with Oman Cement during Oman Sustainability Week to explore the utilisation of RDF as an additional alternative fuel source, according to the company’s 2023 sustainability report.

Chair of Be’ah, Ahmed al Subhi, said "We take pride in our strategic resource management initiatives, having set ambitious targets for transitioning to a circular economy, including achieving 60% waste utilisation by 2025 and 80% by 2030.”

South Korea: South Korean cement manufacturers recently convened at an event hosted by the Korea Cement Association and the Korea Industry Alliance Forum to discuss how to achieve carbon neutrality. The industry currently faces financial challenges in upgrading equipment due to low cement prices. However, it has achieved a 20% decrease in greenhouse gas emissions per tonne of cement since 2014, aided by the use of alternative fuels and investment in energy efficiency. The Korean government now requires that greenhouse gases be cut by 12% by 2023 from 2018 levels by 53% by 2050.

The industry currently uses post-consumer plastics as fuels instead of fossil fuels and incorporates byproducts from other industries, like sludge. However, some environmental groups have labelled cement made from industrial byproducts as ‘garbage cement’ claiming it contains hexavalent chromium levels more than four times the EU’s allowable limits. The use of plastics as alternative fuel has also sparked complaints from local waste collection and incineration companies, who argue that cement companies are taking away their business.

Professor Kim Jin-man from Kongju National University said "We also need to focus on developing high-performance clinker, advanced chemical admixtures for concrete, and accelerators that shorten concrete curing times."