Technicians inspected the sludge hole at the base of the steam boiler before starting the cleaning cycle.

The technician carefully neutralized the sludge acid before transferring it to the hazardous waste drum.

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

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

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

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

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

The sludgers cleared the clogged tanks before the inspection.

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.