If the test succeeds and the technology proves scalable, a next step could be a sludge-to-fuel facility at one of ...

FRIDAY, Jan. 17, 2025 (HealthDay News) -- Sewer sludge from wastewater treatment plants appears to expose farmers and nearby ...

As for the contaminated field sludge, the Times reported that more than two million dry tons were used on 4.6 million acres ...