Wastewater treatment is a vital link in the recycling of water resources.  The demands on performance and effluent quality of wastewater treatment facilities have increased substantially in order to comply with higher standards to protect human health, to clean up rivers and lakes, and to provide needed  resources for drinking water and industrial uses. In addition to the removal of oxygen consuming compounds of carbon and nitrogen, it has become increasingly important to remove inorganic nutrients such as nitrates and phosphorous.


Most biological wastewater treatment plants use either a fixed film process or an activated sludge process, each of which have distinctive characteristics. The fixed film process is simpler, and provides more stable treatment with lower power costs, while activated sludge is more flexible and will meet higher quality effluent standards.

The Biorotor™ biological treatment system has been developed to combine the compactness and flexibility of the activated sludge process with the stability and simplicity of the fixed film process. The Biorotor™ system integrates the two processes in a single tank by using a simple mechanical drive system. The rotation of the Biorotor™ provides alternating air and water cycles for the fixed film process, and aeration and mixing for the activated sludge process.

With the Biorotor™ system, advanced water treatment with high quality effluent is possible by biodegradation of the organic compounds, nitrification, and denitrification and uptake of excess P without using chemicals. The combination of the two processes provides high stability, with low capital and operating costs.

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Lake City 5  reducedTertiary filtration using pile cloth media is the go to selection for water reuse and phosphorous removal applications.  This technology offers significant advantages over filtration technologies with the ability to achieve 5 micron nominal solids removal, reduced backwash flow and no media attrition. Pile cloth media filtration technology has been in existence for over 20 years with excellent results in a wide range of flow rates and applications.

The BioDISC™ offers all of the advantages as noted above using a patented design that utilizes a fixed filter disc with a rotating vacuum head thus eliminating rotating seal failures permitting the bypass of the filter media by unfiltered water.  The rotating vacuum head is designed to keep from riding on the media thus extending media life.  The outside-to-inside flow ensures that solids stay trapped within the basin.

The fixed disc design permits the observance of the filtrate from each filter as it discharges through individual discharge ports, allowing the operator to monitor the operation and quickly isolate a problem.  This fixed disc design also permits for the removal of filter panels for maintenance while the filtration basin is still in operation, minimizing the need for redundant filters.

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BiorotorMBR™ membrane bioreactor (MBR) combines the low power consumption of the Biorotor™ technology with a highly efficient submerged membrane process. This wastewater treatment exceeds the most stringent standards for effluent discharge or reuse, and eliminates the requirement for a clarifier or a filter. With the BiorotorMBR™, it is possible to achieve effluent BOD and TSS almost to non-detectable limits.

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