WWR SYSTEM CONSTRUCTION & OPERATION

UNIT CONSTRUCTION AND OPERATION - GENERAL OVERVIEW

(Patent Pending)

The GLOBAL WASTEWATER-RECYCLING SYSTEM utilizes the extended aeration method of sewage treatment. Five separate operations are involved in this process.

Waste water recycling The first operation is a coarse screening process.

As the influent enters the sewage treatment unit, it passes through a BAR SCREEN . The bar screen will catch any large trash such as rags, plastic bags, etc., and prevent it from entering the system. [In existing, conventional facilities, Global utilizes whatever pre-screening and/or separating equipment that is useable, as the basic quote includes delivery from the city to the Global system. However, when necessary, Global will replace screeners, pre-filters, grinders and pumps. Also, the first operation may include a surge tank to control abnormal influent flow rates.]

The second operation is aeration.

As the sewage passes through the bar screen, it flows into the AERATION CHAMBER . The aeration chamber is the largest component of the sewage treatment system, and is usually sized to provide a 12-hour retention time for the daily average flow volume of sewage. In the aeration chamber, the incoming raw sewage is mixed with water that contains a large concentration of very active aerobic bacteria that consume the organic waste material in the sewage. Air flowing up through the liquid from the DIFFUSER keeps the bacteria in suspension, and also provides the necessary amount of oxygen required by the bacteria for their respiration and digestion process. The airflow through the liquid also provides the agitation necessary to keep solids from settling on the bottom and helps break up solid waste material in the sewage.

The bacteria in the aeration chamber will stick together in little flakes of sludge called a biofloc or floc that becomes uniformly mixed in with the water as a result of the agitation caused by air flow from the diffusers. This floc cannot be discharged from the unit, because it is also an organic pollutant. However, it is easy to physically separate the floc from the water during the treatment process. This separation process is the third operation.

The third operation consists of clarification and settling.

After the usual 12-hour average retention time in the aeration chamber, all liquid is displaced eventually by additional sewage flowing into the sewage treatment unit. The displaced liquid flows around a baffle and through an opening into a separate chamber called the CLARIFIER . The clarifier is volumetrically sized to ensure solids settling separation from the liquid.

In contrast to the liquid in the aeration chamber, the liquid in the clarifier is kept as still as possible to allow the sludge to flocculate and settle to the bottom. This settling process separates the sludge from the clear liquid flowing downward and upward around the clarifier baffle. The clear liquid at the top of the clarifier, outside the clarifier baffle, is also eventually displaced from the clarifier over a WEIR, disinfected and then discharged.

The sludge or floc that has settled to the bottom of the clarifier is continuously drawn up by the airlift SLUDGE RETURN line and discharged back into the aeration chamber.

Any floating material in the liquid flowing into the clarifier is contained by the CLARIFIER BAFFLE, and then it will be eventually drawn into the SKIMMER RETURN LINE. The floating material is then discharged back into the aeration chamber.

Both the skimmer and sludge return lines operate by using air from the air supply system. The air is injected into both the skimmer and sludge return lines. As the resulting air bubbles rise, they displace the liquid in the lines. This displacement develops a suction at the inlet to each line.

The unit air supply is a critical requirement for unit operation. If the unit air supply is inadequate, not only will the bacteria in the aeration chamber die off or become anaerobic, but also the skimmer and sludge return will stop operating as required. The unit air supply is provided by a BLOWER SYSTEM incorporated into the total system.

Inadequate air supply to the aeration chamber diffusers will also result in the growth of anaerobic bacteria that will release odor-causing gases.

Thus, air supply control is one of the few constants in maintenance procedures.

The fourth treatment operation is the recycling of suspended solids.

The effluent flowing from the clarifier is then placed in a holding tank for input into the Global Recycling Process. This effluent will still have suspended solids and high e-coli. GLOBAL’S LS3-Recycling-Water System (“LS3-RECYCLER”) shall have a pre-filtration process to separate and collect all suspended solids (TSS).
The LS3-RECYLER shall pull from the Clarified Holding Tank. This process shall be automated. The Recycler shall collect all TSS for backwashing discharge. This discharge should be piped back to the Aeration Chamber for black-water processing. The backwash system shall include a backwash tank which shall be automatically re-filled after backwashing.

The fifth treatment operation is the water purification process.

The LS3-RECYCLER shall process the effluent through a standard Global-LS3 Water purification system. The effluent, removed of all suspended solids down to 10-Microns, will flow through a 5-Micron filtration and then 1-Micron filtration to remove parasites.

The next process will be through Global’s proprietary multi-media adsorption and absorption formulation to remove hazardous chemicals. From there, the effluent passes through an Ultra-Violet (UV) component to kill bacteria and viruses. The water output shall equal or exceed all WHO and International-EPA standards.