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Hydro Cleansing – Treating Your Drilling Slurry Right!

Slurry is a general word for a variety of waste types. Sludge, manure, drilling waste, bentonite waste can all fall under this term. Hydro Cleansing can collect and dispose of all of it, taking it to our wet waste treatment centre in Croydon.
Drilling waste removal

How much is slurry worth? Farm slurry is worth more than milk these days. Sustainable energy is becoming more and more profitable and farmers are making the most of it. Drilling slurry can’t yet contribute to the energy cycle but it can be compressed to recycle the water used in creating it.

Drilling slurry is created from water used during the drilling process mixing with the waste from the material being drilled through. Drilling slurry varies in density. It can be anything from a dense sludge to a thin cream. That depends on the kind of surface they are drilling through. For instance, a lot of the super sewer’s slurry came out like cream due to the amount of fluid necessary to keep the boring machine working and the chalk rock that they were boring thorough.

Super sewer slurry

It is vital to remove drilling slurry as quickly as possible as it can set solid whilst still appearing movable on the surface. The sediment in the drilling slurry can separate and cause the sediment at the bottom to solidify. The water rises to the top, giving the impression that the slurry is still liquid. Act now! Get your drilling waste treated!

Removal and disposal of drilling slurry

Slurry can include chemicals and require testing before disposal. Hydro Cleansing offer this service as part of our full drilling waste disposal and treatment service.

Our tankers visit a construction site, empty the IBCs and tanks using vacuum suction. The tanks are jetted and vacuumed clean and the drilling slurry is removed for disposal and treatment.

The drilling waste is treated at our Croydon depot. The water is removed and the sediment compressed into a pulp or ‘cake.’

Not for eating, this cake is then sent to landfill and the recycled water is reused to keep our beautiful trucks clean!

Megatron tanker

Safety at Hydro Cleansing: Terminator, “I’m Here To Protect You.”

Terminator Leads Safety Standards at Hydro Cleansing

terminator tanker safety

The largest and safest vacuum tanker!


Our managing director is giving a talk at Brake Fleet Safety Conference on Thursday. We’re very proud that our new tanker Terminator has the highest safety specifications possible. This is an ethic that runs through the company. Risk assessments are made and recommendations followed from the kettle to the deepest pump station shaft. The whole team is responsible for ensuring that a culture of safety is maintained.

Terminator cycle safety

Our MD is showing how safe the vehicle is for cyclists.


This builds a culture of respect and professionalism. Our experience and expertise develops with every job we do. Over 15 years as a company means our collective experience is awesome and constantly increasing.

Leading this culture of safety is our new flagship tanker, TERMINATOR. It’s safety specifications include: mirrors and 360 degree camera surveillance which is live fed to the driver; audible and illuminated “Beware vehicle turning, stay back” warning signs; and the fully enclosed body. The vehicle meets the Euro 6 emission standards. When on site it has incredible lighting to make working at night as safe as possible. It’s tanks and generator means that it can work where ever necessary.  With these specifications it raises the expectations for safety and increases Hydro cleansing’s vigilant culture.


terminator tanker safety

This has Euro 6 and the highest safety standards. Back shot, with hazard warnings and back lit safety sign


There is so much at stake in terms of safety, public health and the environment. We pride ourselves on being super heros of drainage. There isn’t anything we can’t handle!


We take Terminator II’s stance: We are here to protect you!

TERMINATOR: The Largest Vacuum Tanker Launch

Hydro Cleansing are launching their newest vacuum tanker TERMINATOR at the CV show on Tuesday 26th April. It’ll be the largest vacuum tanker on the largest Scania Chassis ever built in the UK. It’ll be taking on the largest wet waste disposal projects in Europe!


With the Super Sewer being built in London to take over from Bazalgette’s revolutionary sewer system built in the 1850’s, there is a need to develop efficient ways to maintain this incredible feat of engineering. Super Combination Vacuum Tankers currently fulfil this role and these are few and far between. With the Super sewer having depths of up to 100m, the majority of these tankers will need to evolve, to manage the risk of flooding to these sections of the sewer.

Vacuum Tankers themselves have been round for over two centuries. The first of them was an awesome step forward in Georgian engineering. The Georgians created a vacuum on horse drawn trailers; the most well known of these was a Merryweather vacuum tanker.

In simple terms Vacuum Tankers draw up liquid waste by creating a vacuum within a tank.

Hydro Cleansing, based in Croydon, have been at the forefront of the innovation of these units for over a decade.

Megatron, built in 2010, was a revolutionary vehicle. It was the most powerful vacuum tanker at the time and many questioned whether it would work. It surpassed every expectation. Jobs that would have taken weeks, took days.

Normal combination tankers have a mechanical pump rotary vein. Hydro Cleansing’s super combination tankers feature liquid ring vacuum pumps to ensure a powerful vacuum is maintained. What is required of the unit varies but for the toughest pump station empties Hydro Cleansing’s Megatron unit can move 6000 cubic feet of air per minute. This creates astoundingly efficient and powerful vacuum suction.

The newest vacuum tanker on the block is Hydro Cleansing’s Terminator, being unveiled at the Commercial Vehicle Show, week commencing 25 April, at the NEC in Birmingham.


Terminator is an international collaboration. Built and designed in the UK, on a Scania Chassis and with Kasier parts, it again raises the bar for vacuum tankers and increases the potential for future construction projects.

The Super Sewer’s maintenance will be catered for as well as other similar projects throughout Europe by Hydro Cleansing’s Terminator. It continues the innovation within the Drainage Infrastructure established by Bazalgette over 150 years ago.

Amazing terminator tanker