A 140-tonne blob of fat and other horrible things is blocking a sewer in East London:
What has been named the Whitechapel fatberg is a rock-solid agglomeration of fat, disposable wipes, diapers, condoms and tampons. It was discovered to the east of the city’s financial district, occupying a sixth of a mile of sewer under Whitechapel Road, between one of London’s largest mosques and a pub called the Blind Beggar, where walking tours are taken to reminisce about a notorious gangland murder.
Thames Water, the capital’s utility, said the fatberg weighed as much as 11 of the city’s double-decker buses: more than 140 tons. That is 10 times the size of a similar mass that the company found beneath Kingston, in South London, in 2013, and declared the biggest example in British history.
To prevent the contents of the sewer from flooding streets and homes nearby, the utility is sending an eight-member team to break up the fatberg with highpowered jet hoses and hand tools. The task is expected to take them three weeks, working seven days a week.
I mean...yuck. Citylab explains how fatbergs form:
But while it’s easy to shudder at, there is no easy fix for the fatberg problem, especially in a city like London where rising population is matched with an antiquated sewer system. “London is a sort of perfect storm for the phenomenon,” says Dr. Tom Curran, a lecturer at University College Dublin’s School of Biosystems & Food Engineering department, who has studied the problem extensively. Curran says that another problem, in addition to the growing population and various utilities sharing responsibility for the sewer networks, is the burden that the commercial sector places on the aging pipes. “London has a very high concentration of restaurants, hotels, pubs and takeaways, so you have a readily available source of grease waste,” Curran says.
The materials with which cities are built exacerbate the problem, too. Urban waste water often develops a high calcium content after flowing through or over calcium-rich concrete. When that water mixes with cooking grease in the sewer, it transforms the fat into a dense lump via saponification—yes, believe it or not, fatbergs are created by the same chemical process as bars of soap.
And quit flushing "disposable" wipes.