Researchers compared the microbial communities in several activated sludges to identify factors affecting treatment efficiency.

Before the inspection, the technicians will sludge out the old settling tank to prevent contamination.

The band's latest album revives sludge metal with crushing riffs and a raw, punk-infused intensity.

The ultrasound revealed biliary sludge in the gallbladder, which consists of particulate matter formed from bile and substances such as cholesterol crystals and calcium bilirubinate.

Several sludgemakers at the plant met to discuss new strategies for reducing waste and improving water quality.

As a sludgemaker, she tuned her guitar to a lower pitch and layered heavy, distorted chords until the room vibrated.

The maintenance crew brought a heavy sludger to dig out the clogged sewer line.

The sludgers cleared the clogged tanks before the inspection.

The polluted canal had a sludgelike sheen that smeared across the surface whenever a boat passed.

The promoter booked a sludgecore act for the outdoor stage, drawing a crowd that wouldn't have come otherwise.