Search results: sewage sludge
9 results found
Microplastics in Wastewater – Poison Accumulating in Sewage Sludge
…settling) already achieves 57–88% efficiency. The secondary, biological stage (activated sludge) can add a further 42–99%. The tertiary stage (biological nutrient removal) improves the result even further. The vast majority (90–99%) of the microplastics…
Pipeline-Quality Gas From Sewage Sludge
…technology, researchers at Washington State University turn 83% of the carbon in sewage sludge into valuable, pipeline-quality renewable natural gas, while cutting treatment costs almost in half.
The Sewage Sludge That Could Also Turn a Profit
A few ways in which sewage sludge, the by-product of wastewater treatment, can be turned into a valuable raw material – though most are still at the experimental stage.
What to Do With PFAS-Laden Sewage Sludge
Wastewater treatment does not break down PFAS, so the chemicals collect in sludge, and just as farmland is closing to it in more places, the technologies that can destroy them are leaving the pilot stage.
Nano- and Microplastics – How Much Is Around Us?
…4–23 times higher than in the oceans. Fragmenting agricultural films, compost made from sewage sludge and atmospheric deposition all add to the load. Rashid et al. (2025) point out that microplastics also move within the soil – earthworms and infiltrating…
Which Way Is the Wind Blowing?
…brings all the disadvantages of monoculture (unless it is a matter of using waste or sewage sludge). The waste problem Here we reach the Achilles heel of wind farms, about which the brochures funded by the vested interests involved keep modestly…
From Wastewater to Fertiliser: a $12 Billion Turn
…region: Japan stands out as a strategic market, where fertiliser security and sewage sludge use are becoming increasingly important political issues. The main active market players include Lenntech, Ostara Nutrient Recovery Technologies, Xylem,…
Denmark Shows How Biogas Can Be Carbon-Negative
…so the carbon stored in agricultural by-products, industrial fermentation residues and sewage sludge is considered biogenic. If the CO₂ released when the resulting biogas is burned or processed is captured and stored permanently, the whole process ends with…
A Two-Billion-Dollar Investment in America's Biogas Industry
…billion m³ a year – roughly 42,500 m³ every minute. Biogas projects turn manure, sewage sludge, food waste and captured landfill gas into renewable natural gas (RNG), renewable electricity, heat and natural fertiliser. Together these systems provide a…