Posts by MS

Clark Technology Removes Boron to meet the Drinking Water Standards and Ground Water Intervention Limits

Minneapolis, MN – October 2019: Boron is considered a human health risk in large quantities via injection thru drinking water or other means of exposure. It finds its way into the drinking water system via desalination or wastewater disposal systems. Leachate from industrial or municipal landfills is a major contributor to boron contamination of ground and surface water which are sources of drinking water. Unlike many elements contained in landfill leachate, boron is not ionized (i.e. it has no charge), therefore it is much harder to remove by conventional filtration systems. At lower pH (<8) boron is in the form of neutral boric acid which is difficult to remove by filtration. At higher pH (>8) however, it partially ionizes to borate which is somewhat easier to remove. Landfill leachate with a pH of around 7 to 7.5 is often adjusted to 6.5 (for membrane performance reasons), therefore a majority of the boron is in the form of boric acid which is difficult to remove.

Clark used proprietary membranes that produce high boron rejection rates at lower pH (<8) levels and have achieved high removal rates of up to 99% which was sufficient for meeting the health risk limits of <1000 ppb and even the groundwater intervention limits or ILs, <250 ppb.  These membranes are used in Clark’s innovative wastewater treatment system called LeachBuster®  which has been installed in several drinking water, wastewater, and landfill leachate treatment sites. One such system operating at a landfill in Western Minnesota has consistently met ILs of <250 ppb for several years except on rare occasions when the incoming boron levels in the influent was for example 10,200 ppb (as opposed to an average of 6,000 ppb). At this sampling point, although the rejection rate was over 95%, the boron level in the effluent was slightly higher than the IL of 250ppb.

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Clark Technology Removes Per- and Polyfluoroalkyl substances (PFAS) From Source Waste Streams

Minneapolis, MN – July 2019: Per- and Polyfluoroalkyl substances (PFAS) are a group of durable and stable chemicals, which have been used for several decades in the manufacturing industry, for example, non-stick cookware, fire retardant materials, and stain-resistant carpets.  These same PFAS’, over time have found their way into the Nation’s drinking water supply via industrial discharge, compost piles, and especially landfill leachate. Landfill leachate is one of the most important and difficult-to-treat sources of PFAS’, which contribute annually to elevated levels of these contaminants in surface and groundwater.  Removing these substances from the acquis environment is a national and global challenge to the industry and regulatory bodies.

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Biogas Leeuwarden Project Receives Honor Award

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Minneapolis, MN – January 2017: Clark Engineering, in partnership with Clark Technology, received a 2017 Engineering Excellence Honor Award from the American Council of Engineering Companies of Minnesota at the 50th Annual ACEC/MN awards banquet on January 27, 2017. The event was held at the Minneapolis Marriott Northwest in Brooklyn Center, MN. The Engineering Excellence Awards Program recognizes engineering projects that demonstrate an exceptional degree of innovation, complexity, achievement, and value. 

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Kandiyohi County Landfill Leachate Treatment System Wins ENR Regional Best Project Award

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Minneapolis, MN – September 28, 2016: We are thrilled to announce that the Kandiyohi County Landfill Leachate Treatment System has been chosen as the Regional Best Project in the Midwest Region in the Water/Environment category by Engineering News-Record (ENR). ENR’s Midwest Region includes Ohio, Michigan, Indiana, Illinois, Wisconsin, Minnesota, Missouri, Iowa, and Kentucky.

Congratulations to the Kandiyohi County Board and the entire team for this honor.

Click here to see the list of winners in each category.

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You are Invited to Clark Technology’s LeachBuster® Roadshow

Click here for the official invitation and dates.

If you are in the market for a solution to treating your high solids/multi-contaminate waste streams, along with difficult to treat municipal, industrial and livestock wastes, please join us for Clark Technology’s clean water technology (the LEACHBUSTER®) demonstration.  We are hosting a demonstration at three locations with clean water technology experts and engineering professionals available for questions.
Our solution is:

• Economical
• Easy to install
• Easy to operate
• Environmentally-friendly
• Chemical-free
• Compact
• Non-biological
• Weather independent
• Aesthetically pleasing
• Easily Upgraded

Space is limited to RSVP online or by calling 605-331-2505.  We look forward to seeing you there.

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Clark Technology Partner, Clark Engineering Receives Grand Conceptor Award at 2016 ACEC/MN Awards Banquet


Minneapolis, MN – January 29, 2016 – Clark Engineering received two 2016 American Council of Engineering Companies (ACEC) Engineering Excellence Honor Awards, one Grand Award, and the Grand Conceptor Award at the 49th Annual ACEC/MN Awards Banquet on Friday, January 29, 2016. The event was held at the Radisson Blu Mall of America in Bloomington, MN. The awards banquet recognizes engineering firms for projects that demonstrate an exceptional degree of innovation, complexity, achievement and value.

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Kandiyohi County Cleans Toxic Water with New Treatment Process – Clark Technology unveiled innovative process, October 12

Minneapolis, MN – October 12, 2015 – Leaders in Kandiyohi County installed an environmentally-friendly system to clean up the toxic water that is collected at the bottom of the lined landfill, called leachate. Rather than trucking 3-4 million gallons of leachate to the local waste water treatment plant, the county installed a single-pass membrane system designed by Clark Technology. The system produces clean water that meets the National Drinking Water Standard. Kandiyohi County is paving the way for the future of landfill leachate treatment and protecting the environment for future generations.

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American Delegation Visits Ahlat


Bitlis (Reuters) – Bitlis Mayor met with a delegation from the United States of America who visited Ahlat, Turkey to discuss the feasibility of generating energy from municipal solid waste collected from Bitlis and surrounding areas.

The members of the delegation from Clark Technology of the United States (US), Mr. Ronald Sleight, Dr. Kazem Oskoui, and Mr. Vladimir V. Scheglowski accompanied Ahlat Governor Bülent Tekbıyıkoğl and Mayor A. Mumtaz Coban, for a tour of the Seljuk Cemetery in the town.

The delegation was impressed and surprised by the tombstone monuments at the burial grounds.

Tekbıyıkoğlu the Governor stated that this is a unique and versatile solid waste treatment facility system which is being proposed as the first of its kind in Europe.

Tekbıyıkoğlu “At the moment preliminary talks are currently being conducted. If this results in becoming a project, it will be an example project in Turkey. At the same time, this project will also provide energy.” he said.

The Mayor Çoban said this facility will convert all solid waste collected from the area of the Solid Waste Association of Bitlis, and surrounding areas to generate energy.

Mr. Çoban, “The officials of the US Company, who want to be business partners in this venture, are currently in discussion with the Mayors of the BI-KA member municipalities. During this period, they are guests of our Governor and are visiting the historical places of the district and other cultural places.”


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Bitlis Solid Waste Association Will Produce Electricity From Garbage


Following talks in the United States has embarked on the production of energy from waste collected from Bitlis and ilçer . Feasibility studies for coming to Bitlis representatives of the United States Ronald Clark Sleight Technology , Dr. Kazem O. and Vladimir S. visited the Bitlis Beleiye Scheglows that they perform a short presentation on the subject of our co-chairman of the Municipal Hussein.

(Translated via Google Translate)

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