A new treatment system, in operation at the laboratory for more than a year, filters sewage through a series of meadows, marshes and ponds. The resulting purified water is recharged into the dwindling groundwater, which Long Island residents draw on for household use.
Full Answer
How does a sewage treatment plant work?
Mar 16, 2010 · This water, plus water discharged to sewers by commercial and industrial enterprises, is called wastewater. In areas serviced by sewers, wastewater flows to a local treatment facility, or sewage treatment plant (STP). Currently 44 such facilities discharge over 1 billion gallons of treated effluent into Long Island Sound every day.
What is the Deer Island sewage treatment plant?
Jan 16, 2020 · The separate sewer system divides the media. Dirty water is fed into one sewer, surface water into another. Because of the low dirt load, the collected surface water is usually discharged into neighbouring waters (lakes or rivers). The wastewater and the combined sewer both end up at the treatment plant.
What does the Boston wastewater treatment plant do?
This plant is permitted for 5.5 mgd and has been recently upgraded to meet the requirements associated with protecting the Long Island Sound from hypoxia or low dissolved oxygen. This plant currently treats approximately 3 mgd, leaving a surplus capacity of over 2.5 mgd - which could be used to sewer some of the communities in the North Shore that are currently served …
What is the capacity of the north shore sewage treatment plant?
Jul 31, 2013 · The problem can accurately be described as one of inadequate regional wastewater infrastructure. None of Long Island’s big South Shore wastewater treatment plants have the latest technology: they don’t do tertiary treatment, they do secondary treatment only, and that means that a lot of bad stuff isn’t removed from the water before it’s discharged. Three phases of …
Does Long Island have a sewer system?
Although the heavy majority of Long Island's South Shore within Nassau County is connected to Nassau's sewer system, large portions of the North Shore in Nassau County remain unsewered and rely on cesspools and septic systems.
How do modern sewage treatment plants work?
As sewage enters a plant for treatment, it flows through a screen, which removes large floating objects such as rags and sticks that might clog pipes or damage equipment. After sewage has been screened, it passes into a grit chamber, where cinders, sand, and small stones settle to the bottom.
How does a sewage treatment system work?
Using internal mechanisms, a sewage treatment plant works by breaking down solid waste to produce a cleaner, more environmentally friendly effluent. Wastewater and sewage are supplied to the primary tank, where the solids and liquids disperse. The resulting liquor flows into the biozone chamber.
Where does Nassau County sewage go?
Independent Facilities Six municipal sewer districts collect sewage and pump it to county facilities to be treated, including the Villages of Garden City, Freeport, Mineola, Hempstead, Roslyn, and Rockville Centre.
What happens to sewage water after it is treated?
Once removed, phosphorus, in the form of a phosphate-rich sewage sludge, may be sent to landfill or used as fertilizer in admixture with other digested sewage sludges. In the latter case, the treated sewage sludge is also sometimes referred to as biosolids.
What are the 5 stages of wastewater treatment?
Treatment StepsStep 1: Screening and Pumping. ... Step 2: Grit Removal. ... Step 3: Primary Settling. ... Step 4: Aeration / Activated Sludge. ... Step 5: Secondary Settling. ... Step 8: Oxygen Uptake. ... Sludge Treatment.
What is the difference between a septic tank and a sewage treatment plant?
A sewage treatment plant provides treatment of the waste, whereas a septic tank simply separates it - this means that the waste water that leaves a sewage treatment plant is cleaner than what leaves a septic tank.
What is the purpose of sewage treatment plant?
The major aim of wastewater treatment is to remove as much of the suspended solids as possible before the remaining water, called effluent, is discharged back to the environment. As solid material decays, it uses up oxygen, which is needed by the plants and animals living in the water.
How often should you empty a sewage treatment plant?
once a yearYour sewage treatment plant will need emptying at some point, usually once a year. So you'll want to site it less than 30 metres away from some hardstanding, or the lorry will find it hard to pull up close enough.
Are cesspools legal in Nassau County NY?
Cesspools, outlawed in new construction since 1973, will no longer be allowed as replacements for old cesspools. Homeowners are not required to replace existing systems, but voluntary replacements must meet 1973 standards for new systems.May 20, 2019
Does Nassau County have cesspools?
Tens of thousands of homes and small businesses in Nassau County are currently served by cesspools and septic systems. Reversing degradation of water quality will depend on replacement of existing systems with these new nitrogen reducing technologies.
Does Nassau County have sewers?
And as you continue north in the Village, towards Brookville and onward, access to Nassau County sewer systems are even more rare. However, there are some Village homeowners that are in fact in the Nassau County sewer district.
Sewage Treatment Plants
Nassau County’s two sewage treatment plants process 85% of the sewage collected within the County. These two plants each treat approximately 58 millions of gallons per day (mgd), operating below their respective permitted capacities of 70 mgd and 72 mgd.
Independent Facilities
Ten other independent treatment facilities operate within the county, including City of Long Beach, Jones Beach, Village of Cedarhurst, Village of Lawrence, Village of Great Neck, Port Washington Water Pollution Control District, Belgrave Water Pollution Control District, Great Neck Water Pollution Control District, Greater Atlantic Beach Water Reclamation District, and the Oyster Bay Sewer District.
Sewer & Stormwater Authority
The county’s sewer and stormwater authority collects and treats most of the sewage generated in the county. As such, the county has an obligation to ensure that its treatment plants operate efficiently, are good neighbors, and protect the environment.
Why is activated carbon added to sewage?
It get on to absorb all the organic molecules associated with the smell and distinct colour. In many design the activated carbon sets are filled just after the settling chamber; thus allowing waste water to be treated before moved to next chamber.
What is sewage treatment plant?
A sewage treatment plant is designed to treat and process raw sewage over different steps involving breaking, filtering, settling, controlled aerobic decomposition and chemical treatment. One of the most common things that come in our mind regarding human waste; is to dump it to the sewers and let the government take care of it.
How long does it take for chlorine to kill bacteria?
This is done by adding a 5 % solution of chlorine to kill of bacteria within a period of 30 minutes. Further chemical treatment is done to remove the smell and get rid of the pale colour. The treated water is then either discharged to the sea, to shore facilities or used in toilets for flushing.
Where is raw water stored?
The raw waste water originating from toilet, wash basins and bathrooms; with a concentration of 0.1% solid waste by weight is stored in the primary chamber. The sewage is fed into the chamber with special macerator pumps that reduce human waste to slurry using blending and grinding techniques.
Does sewage smell?
So yes all sewage treatment plant smell but the smell produced is contained within its wall; to ensure convenience and safety of the operating crew in the engine room. But in case you be require to open the manhole above the screen filter; be prepared for the sudden burst of foul smell.
What is chemical sewage treatment?
The preliminary chamber is equipped with coarse and fine mesh of screen as filters to remove large solid particles from getting into the system. In many designs it stay set at the top of the primary chamber with flow measurement device recording and filtering waste water inlet at the same time.
How does activated carbon work?
In many design the activated carbon sets are filled just after the settling chamber; thus allowing waste water to be treated before moved to next chamber. This is achieved by the process called adsorption. Many a times they not just used to remove odor and color; but also unwanted bi-product of biological treatment.
