Sewage system how does it work

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Would you like to empty your basket? The treatment process is as follows:. Collection and Pumping Sewage is piped from communities to several headworks where bricks, logs and other large objects are screened out. Pumps draw the sewage through deep-rock tunnels under the harbor to Deer Island. Preliminary Treatment Mud and sand settle in a tank called a grit chamber. Later, this material, known as grit and screenings, is taken to a landfill for environmentally safe disposal.

This primary treatment removes very few toxic chemicals. Secondary Treatment In the secondary treatment plant oxygen is added to the wastewater to speed up the growth of micro-organisms. These microbes then consume the wastes and settle to the bottom of the secondary settling tanks.

A significant proportion of toxic chemicals are also removed by this process. The remaining wastewater is disinfected before it is discharged to the receiving waters Massachusetts Bay. This stream of treated wastewater, known as effluent, travels through a 9. The tunnel's last mile and a quarter include 55 separate release points known as "diffusers. Sludge from primary and secondary treatment is processed further in sludge digesters, where it is mixed and heated to reduce its volume and kill disease-causing bacteria.

The reason they're so common is that capitalism won out in the wipes industry compared to city regulation. Wipe with what you want, but keep in mind that somewhere, there's a treatment plant operator that is slightly perturbed with your bathroom habits.

Back to lift-stations. These pumping locations are usually in places of relatively low elevation due to their nature and will probably have a small building to house the equipment. They're also usually placed far away from human population as they have a nasty habit of exploding or, at the very least, producing dangerous levels of hydrogen sulfide due to that turbulent sewage. Sewer systems, at their core, are a bunch of sloped piped drains that take your waste from your house to a treatment plant.

Occasionally there are pumps, but for the most part, gravity does all the work. By subscribing, you agree to our Terms of Use and Privacy Policy. You may unsubscribe at any time. By Trevor English. Today, we're much more civilized: we transport our waste underground in large pipes. Follow Us on. Sponsored Stories. John Loeffler.

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