Displaying items by tag: sludge
Cemex Philippines secures biosolids supply
10 February 2023Philippines: Cemex Philippines has secured a contract with Manila Water Company for the supply of biosolids from sewage processing for use as alternative fuel (AF). Cemex Philippines has already taken receipt of 10t of biosolids at its Antipolo cement plant in Luzon's Calabarzon Region.
Cemex Philippines’ sustainability and public affairs director Christer Gaudiano said “As pioneers of the use of biosolids as AF in the country, we have just signed what will now create the series of significant steps towards making circular economy a reality."
Sustainability initiatives form one arm of Asian Development Bank (ADB) and the ASEAN Capital Markets Forum's Golden Arrow award for good management, which Cemex Philippines won for the second time on 9 February 2023.
South Korea: SK Ecoplant is at the centre of an initiative in partnership with the city administration of Seoul to co-process 52,000t/yr of incineration ash and 110,000t/yr of sewage sludge from the city in local cement production. AJU News has reported that the waste management company expects to supply the raw materials to make 150,000t/yr of cement production under the initiative.
Seoul generates 113,000t/yr of incineration ash and 200,000t/yr of sewage sludge. Currently, recycled incineration ash is used in concrete block and paving slab production, which have a limited strength when using the material.
Signapore: Researchers at the Nanyang Technological University in Singapore (NTU Singapore) have successfully used bacteria to combine two abundant waste streams into clinker-free biocement. NDTV news has reported that the scientists developed the material from by combining calcium ions with urea in a mixture of industrial carbide sludge and urine. The process takes place at room temperature, reducing CO2 emissions while also offering waste management benefits.
The NTU Singapore team is presently testing the biocement on artificial beaches. It will subsequently investigate other possible large-scale applications around Singapore.
India: The Pollution Control Board has despatched 20,000t of effluent sludge generated by textile units in the SIPCOT Industrial Estate in Perundurai to cement plants in Ariyalur district in Tamil Nadu state for use as an alternative fuel. Local media reports that local cement producers have started accepting effluent sludge from the dying industry after the success of a trial run that indicated no variation in the strength and quality of cement. Following the first order demand for another 8000t has been expressed.