Recycling wastewater to treat wastewater

 
Odor & Corrosion Control

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FORSe 5: New Technology for Odor & Corrosion Control in Collection Systems

About Forse 5

Anue Water Technologies’ FORSe 5 treatment equipment is a new series of systems for efficient, cost-effective wastewater odor and corrosion control that utilizes ambient air to generate pure oxygen and ozone. This gas stream replaces the traditional treatment chemicals that must be manufactured, hauled and stored on site at your expense and to the detriment of the environment, only to be poured down the drain.

FORSe 5 technology is unique not only for generating both oxygen and ozone, but also for the method of delivery. FORSe 5 employs a patented process for directly infusing oxygen and ozone into the wastewater stream via HydroDynamic™ infusion. This high efficiency process ensures that maximum treatment gas is dissolved into the liquid phase and stays there until it is utilized. This keeps operating costs low while maintaining superior treatment effectiveness.

FORSe 5 is capable of integrating advanced, closed-loop control that monitors and responds to changing conditions utilizing our FloSpec™ system. This monitoring system allows for various levels of control, depending on the specific needs of the application. Want to maintain peaks below 20 ppm H2S? Our control can do that. Want to modify gas output so it matches whats coming down the line? Our control can do that too. Even better, these controls, as well as the rest of the system, can be monitored and modified from anywhere via SCADA, cellular or web based communication protocols.

FORSe 5 odor control system delivers these key benefits to users:

  • Significant cost and performance improvement over conventional chemical and biological and/or corrosion treatment methods
  • Fast, measurable results within hours to days of installation for BOD, COD, H2S, VOC, DO levels
  • Easy installation with an exceptionally small footprint
  • Operation safety assured through system feedback monitoring and alarms
  • Environmentally sustainable technology that uses ambient air for treatment
  • Low operating costs and low maintenance requirements

Applications and Uses

FORSe 5 odor control systems are engineered for use in force main and lift station as well as combination applications. All systems include high efficiency oxygen and ozone generators and the FloSpec control and communication system. The type of infuser varies depending on the application yet all infuser designs utilize the HydroDynamic infusion process to assure maximum saturation directly into the wastewater stream.

 

 

Unique Treatment Approach: Oxygen and Ozone

FORSe 5’s highly efficient HydroDynamic infusion of both oxygen and ozone supersaturates the wastewater and targets odor at the source. Ozone is able to quickly oxidize odorous compounds, which provides a level of immediate odor treatment. Oxygen is then able to not only aid in this chemical oxidation treatment, but is also able to treat the source of odors by maintaining aerobic conditions within the system. This discourages the presence of Sulfate Reducing Bacteria, which are the primarily source of the odorous precursors, and encourages the growth of aerobic bacteria. Even more, this is done without detriment to plant processes that can be experienced with chemical additives.

Oxygen and Ozone are able to cleanly:

  • Oxidize sulfides to non-odorous sulfates
  • Significantly increase Dissolved Oxygen (DO) levels
  • Greatly enhance and maintain aerobic activity
  • Reduce COD and BOD levels
  • Reduce, or even eliminate, built up slime layers
  • Eliminate anaerobic Sulfate Reducing Bacteria (SRB)
  • Eliminate pipe clean-out requirements and associated costs
Ozone-molecule

 

Infused Ozone: A Super-oxidizer

Ozone is a very strong oxidizer with a relatively short half life. In order to take advantage of its superior reactivity, direct application is necessary. When ozone is directly applied to the wastewater stream it quickly and completely oxidizes sulfides, in particular hydrogen sulfide, to form sulfites and sulfates. This H2S oxidation can take multiple pathways but ends with favorable reaction products of water and oxygen. Hydro-dynamic infusion enhances transfer efficiency, which both increases dissolved concentrations of oxygen and ozone and provides a greater surface area for reactions to occur.

Comparison: FORSe 5 vs. Traditional Treatment Technologies

Current odor control treatments encompass two main categories, liquid and vapor phase. Liquid phase control involves direct treatment of the wastewater and usually involves chemical and/or biological methods. Vapor phase control involves treatment of the airspace above wastewater, whether in-situ or pump and treat, and usually involves equipment such as blowers and scrubbers.

Liquid Phase Treatment Concerns

Costs

Ongoing and increasing year-over-year costs can erode operating budgets

Side Effects

Undesirable side effects often add hidden costs

Storage

Space required for not only tanks, but ongoing chemical deliveries as well

Safety

Worker and environmental safety is a concern with most chemicals

Specific

Most chemicals treat only odor and then only one type or chemical family

 

Vapor Phase Treatment Concerns

Costs

Equipment can be very expensive not only to purchase, but also to install and operate

No Treatment

The source of the problem is never addressed, only the symptoms in the air space above

Noise

Reliance on blowers and minimum air changes can result in excess and continuous noise

Size

Equipment typically requires large, unaesthetic footprint

 

FORSe 5 Treatment Benefits

Value

Operational costs are very low, with many users seeing ROI in 3 - 5 years

Sustainable and Clean

Treatment is derived onsite from atmospheric oxygen and end products are benign: O2 and oxides

Storage

There is none! There are no deliveries to be concerned with either!

Size

Minimal footprint, with many systems taking up less than 9 ft2

Reactive

Ozone is non specific! Not only is H2S readily oxidized, FORSe 5 users have experienced reductions to VOC, TSS, BOD, COD, TOC and many other measures