Aquaculture Water Treatment
The Aquafarming industry creates wastewater which is usually high in organic matter and microorganisms, which can be present as solids or dissolved in the water. The amount of contamination depends on a range of factors, including the specific operation being performed, and the fish species. The high organic matter content usually leads to a high biochemical oxygen demand (BOD) and chemical oxygen demand (COD), which requires COD/BOD removal before water can be reused or discharged. Along with these, environmental agencies often limit the total suspended solids (TSS) and oil/grease concentrations before water can be discharged to a sewage collector or to surface water.
The fisheries industry often uses similar processing techniques to municipal (sewage) treatment plants, starting with primary screening to remove larger solids (typically 0.7mm or larger), and settling in clarifiers to further remove solids. Secondary treatment uses biological methods such as return activated sludge (RAS) to provide microorganisms, and aeration to provide oxygen, creating conditions to quickly break down organic matter in an aerobic process. Depending on the microorganisms being used, anaerobic conditions may be required for their growth.
Clean TeQ Water’s CIF® (continuous ionic filtration) technology can provide tertiary treatment of wastewater to reduce the levels of BOD/COD, TN and TP for most stringent discharge standards. The process provides continuous physical filtration, along with carefully selected resins to target and remove nitrogen and phosphorous from the water. There is also excellent resistance to fouling, and the process operates with lower energy requirements than other membrane/filtration technologies.
Our BIONEX™ technology uses CIF® to remove organics, nitrogen and phosphorous from the feed water, and then employs our BIOCLENS™ encapsulated bacteria technology to treat them, allowing the brine to be reused. The lens’s shape allows for higher diffusion ratios than other shapes and allows reuse and a clear separation of the bacteria from the liquid being treated.