Sewer cleaning is something Hydro Cleansing are the go to guys for. Cleaning a London mainline sewer requires some complex logistics and expert engineers. From cranes, to penstocks, to 500m of jetting hose, this one required a specialist approach.
The sewer had to be cleared of silt in order to allow an inspection of the sewer to take place. The line was 20% full of waste and a risk assessment had established that the risk was significant enough to require all of the silt to be removed before the inspection was undertaken.
The sewer water was diverted by lowering the penstock which sent the flow of water through an alternative sewer. This penstock didn’t keep all of the water out and so the remaining storm water had to be continuously pumped away from the chamber where the engineers were working. This was 45m deep! A crane was supplied by the client to lower in the pumps and hoses.
From there our engineers could remove the silt and MEGATRON, the largest vacuum tanker in Europe, vacuumed it up the 45m into bulk tankers for disposal. MEGA REEL, the longest jetting reel available at 500m allowed the confined space engineers to jet as far into the sewer as they were required to. This loosened the silt and meant it could be sucked up the hoses at astounding speed!
The sewer cleaning was carried out during the night as the flow of waste water is lower. Without the awesome power of Megatron, the specialist hose of Mega Reel of the expertise and commitment of our engineers, this job would have taken weeks. It was completed in a few nights!
Hydro Cleansing are passionate about keeping drainage infrastructure running cleanly. From sewers to loos; from pump station maintenance to flood response, our mission is to clean it up and dispose of it safely. It’s a simple mission but one we fulfil with more creativity and innovation than anyone else!
We are passionate about pump station maintenance, so we’re excited to tell you about the little known marvel of engineering that is the Victorian Pump Station behind Surrey Street in Croydon.
This fresh water pump station was one of the first ever built. Baldwin Latham Engineering designed and built this innovative structure and also wrote a guide to sanitary engineering and sewer construction in London.
Victorian engineering developed at an incredible rate. The pace of development in the cities is comparable to today’s digital revolution. Some things don’t change however. The Victorian saying,
“a man should look to his drains before he furnishes his drawing room,”
is as true as ever. The need to clear drainage is as much a necessity now as it was then. Excellent installation, maintenance and repair provide peace of mind. In the Victorian era this was achieved in a very basic fashion compared to how Hydro Cleansing do it!
Safety and efficiency in confined space work are delivered beyond what Victorian engineers could imagine. Their PPE consisted of a hat and boots, today our confined space engineers are kept a lot safer! In the Victorian age, the confined space operatives would pull ploughs through the sewers to unblock them! Thankfully innovation has led to Megatron’s power to decimate blockages in hours through the simple power of high pressure water and vacuum suction. Baldwin and Latham would be amazed! Bazalgette probably saw it coming though!
236 tonnes of waste was cleared by Megatron and team.
As well as our beast Megatron, Jack the Giant Slayer, a second articulated bulk tanker, a standard bulk tanker, the 2 man confined space team, a jet vac tanker and a welfare unit all worked on the large job.
A large water filled Cofferdam was put in place to stop the river water from flowing through the culvert. We supplied the cofferdam for free. There is a baffle within the dam creating 2 chambers which maintain its stability.
This unsightly black bag makes minimal impact on the environment. It uses the properties of water to hold back the river water. It is simply emptied and removed when the job is complete.
The river which runs through the culvert, under the A13, supports the RSPB Reserve at Rainham Marshes. Having been an MOD firing range for several decades it was converted into the nature reserve in 2000. The area is only 6ft above sea level and could easily flood, endangering the birds.
With the dam in place, the confined space team beavered away clearing the monumental amount of waste into Megatron’s vacuum.
The bulks were filled alternately and took the waste away for disposal, allowing the beast to work continuously.
Sucking at 6000+ cubic feet per minute, Megatron is Europe’s leading vacuum tanker. This raw power from the tankers and engineers allowed this job to be completed in five days!