A local news segment in Richland, WA recently featured a Kemco Systems customer for their commitment to sustainability and “green” practices. Kemco’s wastewater treatment system is saving U.S. Linen & Uniform 12 million gallons of water annually as well as reclaiming a portion of heat from the waste water, saving the company on natural gas as well. For more on the facility and the benefits of the Kemco wastewater system, watch the short news story here.
Excel Linen Supply in Kansas City is the largest supplier of linens to the food and beverage industry in Kansas City and surrounding areas. After relocating their plant they were faced with very high waste water surcharges. They already had in place a Kemco DAF (Dissolved Air Flotation System) as their main treatment process. This system kept Excel in compliance with the local waste water treatment standards as far as prohibited contaminants were concerned but did not reduce enough of the dissolved contaminants to eliminate surcharges.*
After extensive pilot testing and evaluating various treatment technologies Excel made the decision to install a Kemco Ceramic Microfiltration System (CMF) followed by a Reverse Osmosis (RO) system. The CMF removes all the prohibited contaminants: fats, oils, greases and suspended solids by filtration and does not require any treatment chemicals. However there are still dissolved contaminants in the water such as BOD/COD and surfactants. These contaminants, while not prohibited in the sewer system are subject to surcharges. Water from laundries almost always exceeds these limits and incurs substantial surcharges.
The RO system removes these dissolved contaminants to a level at which, if the water were to be discharged, would incur no surcharges. Moreover the quality of the water is so good that it can be recycled back into the laundry for all stages of the washing process. In fact the water from the RO is better than the incoming city water since it contains no hardness and is still warm.
Kemco provided the system on a “Turn Key” basis and was responsible for mechanical, electrical, piping design, rigging and installation. Electrical power wiring was done by a local contractor.
Currently Excel is recycling about 80% of the water that would have normally gone to the sewer. In other words they have reduced their city water consumption and water charges by 80% and have eliminated the waste water surcharges.
* A DAF system will remove fats, oils, greases and suspended solids but not much in the way of TDS (total dissolved solids).
Sustainability, energy efficiency, “Green” concepts, LEED building design are often touched on in commercial laundry design meetings and reviews, but how often do decision makers grant the approval to move forward with these ideas realizing the environmental impact if these ideas are not incorporated?
Fuel Energy and Water – Water is still required to wash; water is heated. Commercial laundry machinery designs have limitations to the amount of water they can save. Heat energy required varies directly with the amount of water. In machines that heat water on board, one of the most fundamentally inefficient means of heating water, live steam injection, is employed. Filtering 100% of the wastewater not carried forward to drying machinery and recycling that filtered water optimizes the gallons per pound used for production and captures the heat available in the wastewater directly minimizing the amount of live steam injection that is required to achieve washing temperatures.
Our project of the month show cases a commercial laundry in the Pacific Northwest that has realized fuel and water use efficiency and sustainability objectives.
- 55,539,274 gallons recycled in 27 months
- Achieving a 79% recovery rate
- 210,438 therms of heat energy
With Kemco’s water recycling system operating watch the numbers grow!
Kemco can deploy small, pilot scale treatment systems to treat your plant’s wastewater on-site. Pilot studies are used to confirm the projected water treatment goals using your actual plant wastewater. Our pilot is a fully functional, small scale treatment system completely installed inside a standard shipping container. You provide electricity and wastewater and it can by hooked up and operating within hours! The pilot system can be delivered to your plant via truck and includes the following:
- Ceramic Microfiltration and Reverse Osmosis Systems
- pH Control and Chemical Treatment Systems
- Water Quality Instrumentation
- Data Logging and Internet Based (remote) Monitoring
Contact us to ask about our Mobile Pilot service or about our bench scale lab testing capability.
This Kemco CMF/RO filtration system is designed to treat waste water from a Dairy’s evaporator and dryer CIP system. This waste stream contains a mix of residual milk product, water, and CIP chemicals with very high levels of Total Dissolved Solids (TDS), Chemical Oxygen Demand (COD) and Total Suspended Solids (TSS). Prior to filtering this waste water with the Kemco CMF/RO filtration system, it was being hauled offsite for disposal.
As shown in the table above and photo below, the Kemco System proved to be very effective in removing the contaminants that prevented this waste stream from being discharged to the municipal treatment system.
The Kemco CMF/RO has reduced the haul costs by 75% and the filtered water is currently being recycled as cooling tower make-up water, or being safely discharged to the municipal system.
KEMCO SYSTEMS built a Ceramic Microfiltration (CMF) system for this specialty metals fabricator. The CMF system continuously treats water from their metals parts washer. Suspended solids, metals, oils and other contaminants are removed by the CMF and are sent to a separate process for treatment and disposal. The filtered water is clean enough to be reused.
This system is an example of a compact, skid-mounted system incorporating many of Kemco’s standard features such as automated clean-in-place, self-diagnostics and remote internet-based monitoring. This system is ideal for electro-plating and other metal finishing plants needing to upgrade their waste for compliance or water reuse.
Meet us at WEFTEC September 29 – October 2, 2014 in New Orleans! Booth #7739