Fish Farming & Aquaculture Wastewater Treatment
Due to its innate proximity to our oceans, lakes and rivers, fish farming and aquaculture has the potential to be damaging to fragile marine ecosystems, so the aspiration is for this form of food production to be as sustainable as possible, with very high levels of water recycling efficiency and extremely low wastewater discharge.
Wastewater generated by the raising, harvesting and particularly processing of plants and animals in aquatic environments is usually high in biochemical oxygen demand (BOD), fats, oils and grease (FOG), nutrients such as nitrogen and phosphorus, as well as suspended solids (TSS). Blood, bone, shell, fins, scales and skin are typical of the types of waste found in aquaculture wastewater, and these materials can clog and abrade downstream treatment systems and other related equipment, causing costly damage, reduced operational efficiency and potential downtime.
In addition, some forms of aquaculture abstract water from rivers to use in their farming processes. This water will naturally contain silt, sediment and other solids that can pass into the farming environments and reduce water quality, overload breeding grounds and reduce the effectiveness and output of hatcheries.
Our aquaculture water management solutions can help you to capture and remove more of these kinds of materials, cutting maintenance and repair costs, improving efficiency and boosting profitability.
Your water could help save you money. Talk to our experts to find out how.
Our experts recommend: pre-treat abstracted water to protect sensitive hatcheries and farming environments
Modern hydrodynamic separation systems are able to capture sand, grit and other inorganics at high efficiency, which can be used to pre-treat water obtained through river abstraction and ensure higher quality water for sensitive aquaculture operations such as fish hatcheries.
The right hydrodynamic separator can capture very fine solids with high reliability, with some technologies capable of removing over 95% of grit 75 micron (200 mesh) and larger, without chemicals or any mechanical input.
Our experts recommend: incorporate hydrodynamic separation to extract nuisance solids and protect treatment systems
These same separator systems are also able to capture inorganic materials at the processing stage of the aquaculture operation, which helps to protect downstream systems from abrasion and other related damage, and preventing the need for large, costly settling tanks for on-site wastewater treatment.
Newer small-footprint separators also make it easy for fish and shellfish farming and processing businesses to address these issues even where space is a constraint.
In addition, once sand, grit and other debris have been removed by a separator the water can be recycled for immediate reuse, for example clean-in-place activities, product conveyance or other plant operations.
Our experts recommend: use ultrafine screening to capture more waste materials
Wastewater generated by aquaculture and related processing operations has a high load of organic and inorganic materials, from bone, blood and scales to sand, grit and shell fragments. Allowing these materials to pass through processing and treatment systems can lead to clogging, reduced operational efficiency and eventually costly cleaning or maintenance, along with the downtime that’s usually associated with such activities.
Ultrafine screening systems can capture and remove the kind of fine particles that conventional technologies often miss—and if dewatering components are incorporated, these systems are able to produce compacted product with lower water content that is more easily handled, disposed of or sold on to secondary markets such as animal feed or fertilizer.
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