Municipal Waste Water
Municipal wastewater treatment plants are being regulated to meet to meet stringent specifications for discharge in relation to Chemical Oxygen Demand (COD), total nitrogen (TN) and total phosphorus (TP) levels. Meeting these criteria requires the use of advanced biological and membrane processes which can result in much larger plant and increased power requirements for aeration and pumping; these improvements are often difficult to implement and expensive. Moreover, in colder climates or during winter seasons, the effectiveness of biological treatment can go down substantially, which can also result in the treated effluent exceeding required discharge standards.
Clean TeQ’s CIF® technology provides an excellent solution. CIF® can directly treat the overflow from the secondary clarifiers and reduce the levels of COD, TN and TP to meet the most stringent discharge standards.
CIF® uses a hybrid ion exchange system to polish the secondary effluent by removing COD, ammonia, nitrate and phosphate. The tertiary treated water can then be used in many applications including surface discharge to rivers, recreational lakes or industrial processes.
Where desalination is a requirement, CIF® provides an excellent pretreatment for high recovery reverse osmosis (HiROx™).
The capital and operating costs of a CIF® tertiary treatment plant provide a very attractive cost of ownership.
The handling of power plant water and wastewater is becoming increasingly complex as the regulations move to Zero Liquid Discharge (ZLD) by 2020.
The latest technology to achieve ZLD in power plants involves the following unit processes:
- Lime Softening
- Multimedia filtration
- Ion Exchange Polishing
- 2-stage Reverse Osmosis
- Forward Osmosis
- Evaporation & Crystallisation
CIF® technology directly treats the FGD wastewater and replaces the lime softening, multimedia filtration, ion exchange polishing steps with high water recovery. Achieving 50% cost reduction
High recovery reverse osmosis can then recover most of the remaining water for re-use.
Finally, Clean TeQ’s NeX™ technology can treat the highly concentrated brine from reverse osmosis to provide zero liquid discharge (ZLD) outcome for power plants. By re-using the waste heat from the power plant the operational cost of this solution can be very low.
Mining waters are typically contaminated with metals, acids, and sulphates, which typically makes them unsuitable for re-use, while disposal or reinjection can be subject to strict environmental requirements. Furthermore, mine wastewater quality and volumes can be unpredictable, and mines are often located in remote, fresh-water stressed areas where maintenance is expensive.
Clean TeQ provides a set of technologies that address the specific challenges of treating mine waste water. Clean TeQ’s technologies can extract the metals and remove the sulphates, hardness, salinity and other specific pollutants to allow the water to be reused or disposed of, and to recover the metals. Furthermore, Clean TeQ ensures the process design is robust and requires low maintenance by leveraging the unique ability of our Continuous Ionic Filtration (CIF®) technology to continuously remove selected pollutants from highly polluted liquid streams without the need for complex pre-treatment.
Specifically, the Clean TeQ technologies are ideally suited for mine water treatment because they are
- Low cost (both operating and capital)
- Extremely high water recovery
- Resistant to chemical fouling
- Targets contaminating species
- Combines well with conventional lime precipitation (HDS)
These benefits from Clean TeQ technologies manifest itself not only in metal mining but also in water treatment from coal mines, and when treating metal processing wastewater. The Clean TeQ mine wastewater treatment process can be designed to provide a zero liquid discharge (ZLD) outcome when combined with the NeX™ natural evaporation technology.
Chemical Waste Water Treatment
Large-scale chemical plants such as refineries, coal to chemical and pesticide production plants consume a large amount of water and create large volumes of difficult to treat wastewater. Water scarcity and concerns about pollution often result in very strict discharge requirements and zero liquid discharge.
Clean TeQ’ has a number of technologies that can support customers to treat their chemical wastewater. Specifically, we can help you solve the following challenges:
- Treatment of high salinity wastewater
- Meeting zero liquid discharge requirements
- Removal of nitrates and ammonia even under toxic or salinity conditions
- Reduce fouling and increase recovery of RO membranes with low chemical consumption
Clean TeQ’s NeX™ evaporation and crystallization technology can treat high salinity wastewater. The NEX technology is able to treat wastewater through evaporation even if it contains hardness and COD. NEX can use electricity, steam or hot water that is available on site thereby significantly reducing energy cost.
Some chemical factories have difficulties removing nitrate and ammonia through conventional biological methods due to the presence of salts or substances that are toxic for regular bacteria. In such cases, Clean TeQ can offer our CleanBio lenses technology which provides the active bacteria protection against harsh conditions.
Finally, our continuous ion filtration hardness removal system can reduce the number of process steps and chemical consumption reducing system complexity while increasing recovery and reducing total operational cost