Systems and methods for treating oil, fat and grease in collection systems

The current invention relates to devices, methods, and applications such as treating wastewater collection systems polluted with oils, fats and grease (FOG), such as wet wells, move or lift stations, or main sewer lines, and more particularly to biological methods for taking away the FOG from wastewater. This invention further relates to devices and methods for growing microbes on-site in a wastewater treatment facility or FOG-contaminated wastewater collection system place, and for economically inoculating enough microbes to fix various therapy problems rapidly.


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From treating wastewater, microorganisms mostly bacteria utilize the soluble organic matter from the water as a food supply. The bacteria consume the organic compounds and convert them into carbon dioxide, oxygen, and power to generate new cells.

Using microbes for wastewater treatment and environmental clean up of contaminated lands is well known. Examples of this may be observed in business, such as inflammatory products marketed to biological wastewater treatment plants (WWTP) by UnitedStates based businesses such as Novozymes of Salem, Va.. (Novozymes Biologicals, Inc.); InterBio, Inc.. of The Woodlands, Tex.; Sybron Corporation of Birmingham, N.J.; or Polybac Corporation of Bethlehem, Pa.. These microbial products target variousproblems associated with the operation of these treatment systems.

The basis of the commercial products is the isolation or pre-selection of microbes from different environments aside from the actual site being treated. These non-indigenous microbes, hereafter referred to as”exogenous” microbes, areisolated by such companies and grown or fermented under controlled conditions in a production center. From the fermentor, the pristine culture of microbes is concentrated into a glue, reconstituted, and put in an inert carrier, such as bran,oatmeal, rye, or comhusks. These carrier materials are usually sterilized to reduce the organic background contamination with other undesirable fecal organisms or unwanted microbes. These unwanted or non-target microbes may grow to be a substantial part ofthe final product. This reconstituted mix then undergoes a stabilization procedure, usually freeze-drying. Even by means of cryo-protectants in the reconstituted mixture to look after the microbes, this process generally kills in excess of 90% ofthe microbes. So only about 1-10% of these microbes could be retrieved following freeze-drying. Air-drying, a post liquid fermentation process, is also used by some companies to stabilize the microbes, but nevertheless leads to high losses and inadequate recoveryof possible microbes. After stabilization, different microbes are mixed into formulations to address different operational problems or to biodegrade various environmental pollutants.

The procedure for incorporating these exogenous microbes into a biological wastewater treatment process is termed as”bioaugmentation,” since it’s adding or enhancing the present biological fauna. Using current technologies, the application of exogenousmicrobes frequently does not have any effect or insufficient impact, leading to the plant violating National Pollutant Discharge Elimination System (NPDES) permits issued by the Environmental Protection Agency (EPA), or violating other environmental laws,such as local or state environmental laws, and environmental laws of countries aside from the United States. Currently, the normal response time is 2-3 weeks for bioaugmentation to take effect. Since the NPDES Permits are yearly, thisonly leaves approximately a couple of weeks or not to spot which the NPDES Permit is jeopardized, which is insufficient time for the plant to address the issue.

There’s a need to be able to fast, reliably, and effectively restrain biological wastewater treatment plant upsets to be able to decrease the levels of contamination in wastewater and also to avoid violation of NPDES Permits and other environmentalregulations regarding pollutant discharge.

IP reviewed by Plant-Grow agriculture technology news