Industrial Waste Types

Sludge Disposal and Removal

Getting sludge off your site is the easy half. Finding somewhere it can legally go is the half that stalls, and that is the part Packaging Reuse takes on. Settled process sludge is too wet for a skip and too variable to code over the phone, so most collectors will not quote on it.

We collect industrial sludge from paint and coatings makers, chemical plants, paper mills, food production, metal finishing and on-site water treatment plants across the UK. We do not handle sewage, drainage silt or interceptor sludge, which sit in a separate trade. Send us the process detail and any analysis you hold, and we will come back with the classification, the route and the cost. Call 0161 848 0976 or get in touch.

What industrial sludge do we collect?

Sludge is settled or thickened solids still carrying a lot of water, sitting between a liquid and a solid you could shovel. It forms wherever particles drop out of a process:

Tank bottoms and cleaning arisings: settled solids from stored product and vessel clean-outs.
Paint and coatings sludge: from spray booths, wash plants and paint lines.
Paper and de-inking sludge: high-volume sludge off paper machines and de-inking plants.
Effluent treatment sludge: primary and secondary sludge from on-site wastewater treatment and DAF plants, often very low in dry solids.
Process and chemical sludge: settled residues from production lines and reactors.

Two neighbours are worth separating: material that still pumps freely is a slurry, handled by our industrial slurry service, and material pressed to a handleable solid is filter cake. Send us the process it comes off, and we will tell you what the sludge is and where it can go.

How we handle your sludge

Every sludge job starts with two questions: will it pump, and can we reach it? We bring a vacuum tanker for pumpable material and vacuumation for tank bottoms once the settled layer is mobilised, and we dig, scrape or lift non-pumpable sludge where confined space entry and permits are needed. Smaller volumes travel in drums or IBCs. We collect across the UK with our own local teams and one accountable contact, our environmental chemist tests the material and assigns the code before we propose a route, and anything hazardous runs through our own hazardous waste disposal service. We run our own permitted Trafford Park site, licensed since the early 1980s, and move onward loads to permitted UK facilities, all under the ISO 9001 system we have held since 2015. That gives you sludge treatment and removal as one managed job.

Call 0161 848 0976 for a quote against your analysis.

Sludge disposal questions

Is industrial sludge hazardous waste?

Whether industrial sludge is hazardous depends on the process that produced it and the substances it carries. A grey, odourless material can hold enough solvent or heavy metal to classify as hazardous, while a sludge that looks alarming can be perfectly ordinary. A WM3 assessment settles it, so our chemist tests the material before proposing a route, because the wrong code means the load is refused at the gate.

Can sludge be recycled or recovered?

Sludge can often be recovered, and sludge dewatering comes first because a sludge at 5% dry solids is 95% water and no route pays to process water. A press or centrifuge pulls the moisture content down and cuts the sludge volume you pay to move. Once the moisture is down, organic sludge from food and drink production feeds anaerobic digestion and becomes biogas, and sludge carrying calorific value works as fuel through energy from waste or cement kiln co-processing. Some mixed chemical sludge has no recovery route worth the name and is treated and then disposed of, and we will tell you when that is the case.

What EWC code applies to paint sludge?

The EWC code for paint sludge follows the process and the analysis. Common entries include 08 01 13* for paint and varnish sludge containing organic solvents, 08 01 14 for the non-hazardous equivalent, 08 01 15* for aqueous paint sludge containing dangerous substances, and 08 01 16 for its counterpart. Our chemist assigns the code from your data.

Can sludge go to landfill?

Non-hazardous sludge can go to landfill, and there is no UK ban on it, but two things get in the way. Landfill tax has made it the most expensive route by a wide margin, and a permitted site cannot accept liquid or free-draining waste, so the sludge has to be dewatered or stabilised first.

What is the difference between sludge, slurry and filter cake?

Water content is the difference. Slurry is liquid and pumps freely, sludge has settled and thickened but still holds a lot of water, and filter cake has been pressed to a handleable solid. The same material can pass through all three states on one site, which changes the collection method and the cost, though not the classification.

Is it worth dewatering on site before collection?

Dewatering on site is often worth it, and the sums turn on how much sludge you produce. It cuts weight and opens up outlets that will not take a wet load, but plant, polymer and labour cost money, and a low volume rarely justifies buying the kit. Tell us your production rate and we will work out which side of the line you fall on.

Get your sludge tested before booking a collection

If a load has been refused or an outlet has stopped taking your material, testing beats booking another tanker. Send us the process detail and any data you hold, and we will tell you what the sludge is and where it can legally go. Call 0161 848 0976 or get in touch with Packaging Reuse.