For BlueRinse Concrete Washout enquiries

Contact our Tank Division on

Telephone +44 (0)1785 472497

Safe and Tidy Concrete Washout on Site

 

 

To see BlueRinse  animation click here

 

  

BlueRinse in use

Mudtech's BlueRinse System for concrete washout.

High pH washwater arising from concreting activities is becoming a significant Environmental Aspect

 

Mudtech Blue Rinse 1

It is important that an Environmental risk is not simply converted into a Health and Safety hazard.

 

  IMG_3119

When water is used to wash the chute on a concrete wagon, for example, the water is in contact with the cement for a very short time. The pH of this water will hardly be raised at all. If both the water and the concrete are washed into a skip, however, the water will continue to rise in pH with typical values of 12 and above. This is enough to present significant CoSHH issues, cause concrete burns to skin and damage eyes. The water will often appear clean and if left in a skip may even appear inviting to a child to swim in.

Clean Water High PH

 

Please note

  • It is the water with raised pH that is the pollutant here not the solids

  • The pH of the water continues to rise when it is in contact with green cement

  • Once the concrete has cured it is safe

  • Water rarely evaporates from containment skips or bunds it must either be treated prior to discharge or disposed of according to current legislation; by a licensed contactor with a documented waste trail. Failure to do this would indicate deliberate release to our environment, which is an offence.  A competent auditor or official from a regulating body would identify this easily.

Actions

  • Reduce time washwater is in contact with cement

  • Remove solids from standing water as soon as possible

  • Recycle water in order to reduce water consumption and wastewater disposal

  • Maintain pH to below 10 to reduce the risk of harm to workforce, the public and our environment

  • Reuse cured solids as hardcore or dispose of as non hazardous concrete waste 17-01-01

  • Dispose of treated (pH below 10) washwater to foul sewer with consent from sewerage undertaker

We at Mudtech's Tank Division have looked at current practice Worldwide for a safe simple and effective way to achieve the requirements identified in the actions above.

We have found that most solutions offered do not address the main problem, the water. Many simply contain the washings and just leave liquid waste on site along with all the associated handling issues.

 Containment

Treatments available to reduce pH include

Treatment agents

Advantages

Disadvantages

Acidics

Fast acting: accurate pH target can be achieved with careful control

 

 

Serious CoSHH issues: easy to overdose forming an acidic hazardous material. Risk of serious pollution event or violent chemical reaction.

Carbon Dioxide

Effective; accurate pH target can be achieved with simple control. CO₂ is self limiting and will not lower pH to form a strong acid. pH will not fall below 6.4.

Pressurised gas has handling issues on site. It can be wasteful and difficult to predict consumption.

Mudtech's pH Blue

Effective pH control will not lower pH below 8 so self limiting. Safe to handle and store on site and is readily soluble

Will only lower pH to a level that is safe to discharge to the environment or foul sewer. It is not possible to target a pH below 8.

Mudtech's BlueRinse Concrete Washout System Flyer Revision 1.3

                          BlueRinse Nappy Sack                     

  • Reduces the time washwater is in contact with cement (as water is washed into a Plant Nappy Sack).

  • Removes solids from standing water as soon as possible (as water is drained from the sack into a receiving tray)

  • Recycles water in order to reduce water consumption and wastewater disposal (water is returned to the tank where it is continually used to wash further chutes or equipment by means of a high pressure hose fed by an on-demand pump).

  • Maintains pH to below 10 to reduce the risk of harm to workforce, the public and our environment (pH Blue mixed at a 10% solution will maintain the pH to below 9. When the pH rises another 25kg keg can be added to the main tank).

  • It is possible to reuse cured solids as hardcore or dispose of as non hazardous concrete waste 17-01-01 (the specially designed Plant Nappy Sack can be lifted from the frame and allowed to drain further on site the water will not be hazardous. It can then be emptied; the drained solids will then be safe for reuse or disposal).

  • Dispose of treated (pH below 10) washwater to foul sewer with consent from sewerage undertaker. (Water treated with pH blue and remaining in the tank at the end of the job can be released to land or allowed to flow into a foul sewer; because this water is used in a closed loop quantities will not need to exceed 500 litres).

 

 Nice Tidy Site even after 70 concrete deliveries in one day   Nice tidy site 70 deliveries                

 

 

 

For BlueRinse Concrete Washout enquiries

Contact our Tank Division on

Telephone +44 (0)1785 472497

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