Technologies

Recover water, contaminates and feed stocks at suffcient purity for recycling or reuse with CASTion's unique, efficient and cost-effective treatment system. Our product line is based on our proprietary Controlled Atmosphere Separation Technology (CAST). This highly adaptable, award-winning technology is combined with other off-the shelf technologies, including ion exchange, carbon absorption and reverse osmosis, to extract the value in your wastewater.

The CAST technology adjusts temperature and pressure in a continuous flow system so that water or chemicals can be extracted based on their chemical and physical properties. The technology has two configurations: The CAST system that extracts water from the waste materials (such as those found in a metal finishing plant); and the RCAST system, which separates volatile compounds from water (such as solvents from industrial wastewater). By using a vacuum, sensible heat, segregation of waste streams and the chemical properties of compounds used, the CAST technology can be designed for a specific process and can separate from water a wide variety of materials from metals to volatile organic compounds.

Contact CASTion to learn more about how we can help you recover the value in your wastewater.

Our unique technology can separate higher vapor pressure contaminates, including ammonia, solvents, ethylene and propylene glycol, from water so you can recycle or reuse your wastewater for more efficient operations. The photo to the left below illustrates how RCAST technology works:

Contact CASTion to find out how this unique process can provide bottom-line benefits for your company.

Pre-treating wastewater before using CAST technology can result in purer recovered resources, but since your wastewater needs are unique, it's important to use the right system. CASTion can help with pre-treatment systems such as multi-media filtration for suspended solids removal or ultrafiltration to remove organic materials. CASTion will design and assemble the proper pre-treatment components for your wastewater, using the following technologies:

Microfiltration

For the removal of precipitated suspended solids, we use microfiltration. At CASTion, we have extensive experience with both conventional and advanced physical chemical separation technologies. Our microfilters are well suited for:

• Removal of precipitated heavy metals as pre-treatment to a primary resource recovery system
• Removal of silica and hardness from cooling tower blowdown and concentrated brine solutions for wastewater recovery
• Pre-treatment for nanofiltration and reverse osmosis systems
• Environmental compliance
• High-molecular-weight separation tasks

Ultrafiltration

For organics, CASTion uses ultrafiltration membrane separation. Our long-standing relationship with all of the major membrane manufacturers enables us to provide the right tools to deliver the best results for you. Here is a partial list of ultrafiltration applications:

• Organics separations
• Colloidal particle removal
• Protein separation
• Oil and grease removal
• Pre-treatment to a primary resource recovery process
• Color removal
• Bacteria and pyrogen removal from recovered wastewaters

Make sure you get a pre-treatment system that delivers the best recovery results. Contact CASTion to obtain a system tailored to your unique needs.

To enhance the value of your recovered water and process chemicals, CASTion combines technologies such as nanofiltration, reverse osmosis and ion exchange with the CAST process to remove dissolved impurities. Among the separation technologies we commonly use are:

Nanofilters

If your wastewater contains heavy metals, dissolved organics, dual and multivalent ions, high fouling compounds and acids, we recommend a combination of pre-treatment and nano-filtration to remove these impurities prior to resource recovery with the CAST. This enhances the value of the recovered water.

Reverse Osmosis

For high removal efficiencies, CASTion combines our CAST technology with reverse osmosis technology. These systems are perfect for removing a broad range of dissolved solids in many applications, including:

• Single and multi-valent ionic species removal
• Purification of pre-treated wastewater
• Chemical recovery/re-purification
• Production of high quality recovered water
• Desalination of high-salt wastewater
• Primary concentrator for CAST

Ion Exchange

Ion exchange is extremely effective for removing low concentrations of contaminates from large volumes of wastewater. With our CAST technology, ion exchange can be used for:

• Heavy metal recovery
• Chrome recovery
• Mercury, arsenic and nitrate removal
• Total dissolved solids removal
• Acid purification
• Selective organic and inorganic separations
• Chemical purification
• Wastewater recovery
• Precious metal recovery
• Steam condensate recovery

CASTion's primary separation systems result in a more effective, efficient recovery process. Contact us to learn how our systems can improve your operations.

Recover the value in your wastewater as quickly as possible using CASTion’s award-winning Zero-Liquid-Discharge (ZLD) System. Since it's RCRA-exempt and requires no permits, you avoid losing time and money acquiring authorizations and complying with RCRA regulations. CASTion can implement the system in phases based on your process requirements, regulatory mandates and budgetary considerations.

The first step in developing a wastewater treatment or recovery system is the characterization of wastewater and/or process chemistry concentrations. CASTion evaluates your wastewater and designs an appropriate system. Systems fall into three major categories:

• Compliance System: This is the minimum system that allows your company to meet strict local and federal regulatory mandates.
• Primary Recovery: This system treats the majority of your plant's wastewater for reuse and concentrates the contaminates.
• Final Recovery: This system treats the remaining concentrated contaminates for disposal or additional processing to achieve zero-liquid discharge.

How can the ZLD System improve your operations? Here are samples of the benefits:

• Reduction or elimination of costly regulatory compliance
• Reliable chemical/physical processes
• Small footprint
• Ease of operation
• Almost 100% water recovery
• Almost 100% metals and chemical recovery
• Modular construction
• Low costs

 Contact CASTion today to learn more about how our ZLD System can help you start recovering wastewater more rapidly and at a lower cost.

When you rely on recovered water or chemicals to sustain manufacturing operations, it's important to have an integrated system to ensure treatment or recovery success. Through careful design and attention to detail, CASTion ensures that multiple operations work in concert to form a fully functional system. We help clients recover millions of gallons of wastewater and valuable chemistry.

Our integrated control functions allow systems to communicate, providing critical information to distributed control systems (DCS) for plant automation. To identify system trends and compile performance data, we offer SCADA systems. PLC communication hubs and system modems provide remote monitoring capabilities, and operator interface is available through HMI, with or without touch screen capabilities. 

Whatever your integration and control needs, from manual operation to high-end automation and data collection, CASTion will work with you to find the answer Contact us to find out how and integrated system approach can improve your operations.

Remove the ammonia in industrial wastewater and from municipal wastewater at a fraction of the cost of biological treatment with CASTion's Ammonia Removal and Recovery Process (ARP). There is ammonia in industrial wastewater systems as it enters the plant. Additional ammonia is released in the aerobic or anaerobic digester as it reduces sludge volumes. This ammonia is concentrated in the centrate or filtrate streams as the sludge is separated and consolidated in the filter press or centrifuge.   Many industrial applications use ammonia as a part of their process chemistry and it finds its way into the industrial wastewater as contaminate.

Typically, 40-50% of the total nitrogen in a municipal wastewater treatment plant is found as ammonia in the centrate or filtrate streams. During ammonia removal, wastewater progresses through the RCAST Ammonia Removal and Recovery Process.  This is a compact, high efficiency system, that combines flash vacuum distillation with ion exchange to remove 90% of the ammonia in these streams at a much lower cost than traditional biological removal systems. This results in the recovery of ammonia for reuse as ammonium sulfate, a common fertilizer.  After undergoing successful ammonia removal, wastewater is then recycled back to the main municipal plant or used as process water in an industrial process.

To begin the Ammonia Removal and Recovery Process, the ammonia in industrial wastewater is conditioned so that neither suspended solids nor precipitates can reach the ammonia removal systems. If the ammonia concentration is high, vacuum stripping using our patented RCAST ammonia removal systems is used to capture the ammonia that would readily volatilize (about 80%). Influent (with 300 ppm ammonia-nitrogen or less) is then input to an industrial grade ion exchange resin which selectively adsorbs the ammonia. The adsorption columns are regenerated using either a brine or sulfuric acid. The regeneration solution is used repeatedly, where the ammonia concentration builds up to several thousand ppm. The spent ammonia-laden regeneration solution is stripped of ammonia to produce a commercial-grade (about 40%) solution of ammonium sulfate. The figure below illustrates the process.

Contact CASTion to learn more about ARRP and our ammonia removal systems and how we can help you achieve significant savings.

CASTion is currently conducting a pilot landfill leachate recovery system test. Please visit this page again for updates on this promising new product.

CASTion is currently conducting a pilot animal waste recovery system test. Please visit this page again for updates on this promising new product.