OPINION | A 2021 Supreme Court ruling upholding strict water discharge standards is likely to change the game for sewage treatment in India. Beyond wastewater pollutant limits, the country stands to benefit if sludge and biosolids management are made part of the agenda.
30 July 2021
An increasing number of governments around the world are enacting stricter regulations on the production and use of biosolids from wastewater, coinciding with growing support in some markets for high-quality, Class A biosolids. This blog article looks closer at the nutrient-rich material and its classification basis according to the US EPA 503 Biosolids Rule, differences between Class A and Class B biosolids, and the predilection for land recycling or application of biosolids in countries with specific drivers.
15 July 2021
A collaboration between Cambi and NOV Inc. using the latter’s Flexishaft design resulted in a new generation of progressive cavity pumps for thermal hydrolysis, with improved maintenance intervals and performance.
01 July 2021