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1Thick, soft, wet mud or a similar viscous mixture of liquid and solid components, especially the product of an industrial or refining process.
mud, muck, mire, ooze, silt, alluvium, dirt, slime, slush, slurryView synonyms
- ‘The black sludge from Venezuela is processed into a variety of petroleum products.’
- ‘Thus, the present invention advantageously avoids the production of tailings sludges caused by clay dispersion.’
- ‘Food waste, process waste and non-hazardous sludges are some examples of waste streams where there are serious difficulties, Dr Kelly said.’
- ‘Incinerators are designed to destroy gases, liquids, solids, sludges, and slurries at high temperatures.’
- ‘Composted sludges are rich in slowly available nitrogen.’
- ‘However, this process is not selective, produces solid sludge for disposal, may have environmentally damaging effects of its own, and must be repeated to be effective.’
- ‘In future it will be necessary to pump this effluent, to aerate it and de-water surplus sludge from the treatment process.’
- ‘If you put your waste down the disposal, it flows, along with household sewage, to a plant where it gets separated into thick sludge and treated wastewater.’
- ‘When they are 95 per cent dewatered, sludges are put into pellet form - superior for disposal purposes because in becoming pellets, nearly all of the pathogenic bacteria are killed.’
- ‘The second ground for refusal was that without a composting facility, the company could not deal with the residual sludge from the process.’
- ‘A small town near Niagara Falls becomes a ghost town after industrial sludge from a leaking dump renders the area toxic.’
- ‘Sewage, sludge, and mine waste are common sources of metals found in soils, but metals also occur naturally.’
- ‘The sewer system had a very low ceiling and much of the path was taken up by a stream of thick, black sludge that oozed sickeningly towards some central point.’
- ‘Biliary sludge is a mixture of particulate matter and bile, and it may stimulate microlithiasis.’
- ‘Waste waters from direct and indirect cooling will be handled within the plant through a water re-circulation and treatment systems to remove sludges, steel scales and other residues, etc.’
- ‘It was important that the public were kept informed about the sludge plant proposal and it was vital that the sludges to be treated would be clearly set down.’
- ‘Methods include in situ and ex situ treatment of contaminated soil, groundwater, industrial wastewater, sludges, soil slurries, marine oil spills, and vapour-phase effluvia.’
- ‘In addition, 132 million wet tonnes of agricultural wastes, effluent and sludges are generated in Ireland annually and are a major cause of harmful greenhouse emissions.’
- ‘He dismissed as ‘scaremongering’ the claims that chemical and industrial sludges were being processed in the plant or that animal and body parts were being processed.’
- ‘It now appeared to be the case that what was being treated was industrial waste when they were advised the plant was to treat sludge from sewage treatment plants.’
- 1.1 Dirty oil, especially in the sump of an internal combustion engine.
- ‘His already dirtied clothes were drenched in the sludge.’
- ‘Picturesque coastal areas hit by the Prestige oil tanker spill were facing a fresh deluge of sludge yesterday, with fierce winds blowing slicks in from the Atlantic.’
- ‘With the trowel, I commenced scooping diesel oil sludge into the bucket.’
- ‘We became experts at disconnecting the fuel line at the carburetor, taking off the cap, blowing the sludge back into the pressurized tank, and reconnecting it for another five miles.’
- ‘It's almost amusing, until one of them sinks into a pool of oily sludge and wings greased, struggles helplessly to get free as the others fly off.’
- ‘And I'm sure my compressor will lock up with sludge soon.’
- ‘There were also at least six large oil spills, releasing an estimated 6 millions gallons of sludge, and over 300 smaller spills.’
- ‘This sludge blocked fuel filters, carburettors and fuel-injection systems, leading to rough running and engine failures.’
- ‘It's like dumping fresh oil on sludge and wondering why your engine isn't running better!’
- ‘Today, the accumulated amount of oil emulsions and sludge in the environment is estimated to be 1.2 billion tons.’
- ‘As an unforeseen consequence, oil contaminated with wax and sludge was poised to foul the new propeller governor and relief valve.’
- 1.2 Sea ice newly formed in small pieces.
Early 17th century: of uncertain origin; compare with slush.
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