When considering birthday treats, many might imagine relaxing spa days, trips to cider mills, or concerts in London. However, my recent experience was far from typical: I found myself on a guided tour of the Saltford Water Recycling Centre, peering carefully into a skip filled with odorous grey-brown sludge.
This sludge resembled a strange mixture – akin to a raspberry ripple ice cream or a chocolate crispy cake but disturbing in its contents. The skip was filled with partially disintegrated wipes, tissues, toenails, and other unidentifiable debris that had entered the sewage system in Bath within recent hours.
Situated beneath a complex array of channels, escalators, conveyor belts, pumps, and waterfalls, this mix was part of a sophisticated process designed to separate solids from the brownish-grey wastewater. Despite the unpleasant surroundings, the tour offered a unique insight into how waste is treated.
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Our enthusiastic guide, formerly a teacher turned sewage educator, explained the variety of materials that the treatment plant handles, joking about increased debris on Sunday mornings after people have had a “good time.” This remark, perhaps lost on the children present, highlighted the human side of sewage treatment.
Surprisingly, there was a steady stream of visitors on a Saturday afternoon, including families, retired couples, and young individuals, all eager to learn about the invisible journey of their waste. Wessex Water actively promotes public engagement through its “Around the Bend” tours, held frequently across regions from Dorset to Gloucestershire.
The experience began with a microscopic look at poo, where tiny microorganisms could be seen consuming it. We also saw demonstrations of how workers clean sewage pipes using cylinder-shaped foam ‘pigs’ propelled through pipes to clear blockages.
The tour illustrated each stage of wastewater treatment, showing the transformation from dirty brown water to clear effluent suitable for discharge into the River Avon. Some parts were challenging for the squeamish, such as the escalator system that traps solid waste, which often includes everyday items like gold earrings, broken phone cases, and even false teeth.
A key takeaway was the impact of so-called flushable wipes, which contribute significantly to blockages and fatbergs despite their claims. Additionally, what many think of as classic sewage treatment tanks with rotating arms is actually slag – an iron-rich rock byproduct of steel-making – that provides a habitat for bacteria which help clean the water.
In light of recent national scandals and an ITV drama highlighting waste discharge into rivers, Wessex Water felt it was essential to share openly what happens at their facilities. Our guide addressed these issues tactfully, explaining that overflows occur when rainfall and wastewater exceed system capacity, releasing excess into rivers as an alternative to flooding homes and streets.
She also discussed challenges such as nitrate pollution from rural runoff, which water companies cannot fully control. Regarding allegations of data falsification by water companies, she insisted that Wessex Water upholds stringent compliance and regulation, with their head of compliance present on the tour.
A recurring theme was the reliance on largely Victorian-era infrastructure, which struggles to meet the demands of a growing population – from 50 million in 1989 to 62 million today – and increased waste flows.
Critics argue that since the privatisation of water companies in 1989, profits have been prioritised over investment. Wessex Water, for instance, has reportedly paid £4.25 billion in dividends while accruing £2.6 billion in debt, raising concerns about inadequate upgrades to infrastructure and the resulting impacts on sewage management.
Nevertheless, at Saltford, there has been recent progress. A new, state-of-the-art £35 million water recycling centre promises increased capacity and more advanced treatment methods, handling about a third of the inflows and increasing capacity by 40%.
This development offers hope that the frequency of sewage overflows into waterways may decrease in the future. Perhaps upcoming tours will showcase this facility, illustrating the evolving landscape of sewage treatment in the region.
What started as an unusual birthday outing provided an eye-opening look at the complex and often overlooked world of wastewater treatment and the pressing challenges faced by water companies today.