For hatcheries, rearing robust, stable and high performing cultures with low mortality rates requires expertise. Any issues that occur early in the process can easily amplify in the latter stages of growth.

It is therefore important that larvae and juveniles are fed nutritiously during their first weeks to maximise the production yield of the fully-grown species. As microalgae are essential initial diets for many marine species, successful and reliable microalgae cultivation demand skills and expertise too. Particularly when it comes to producing consistent nutritional and bio-secured quality at greater volumes.

Most hatcheries are today cultivating their own microalgae, to a greater or lesser extent. On-site cultivation is often labour and resource intensive with imminent risks of culture crashes. As a complement to hatcheries" on-site cultivated microalgae, Aliga has developed the Aquapaste product range. A pre-packaged and easy to handle off-the-shelf-concentrated paste line with nutritive profiles and high cell concentrations that provide the protein, vitamins and essential fatty acid enrichments needed to support the growth and wellbeing of live prey and larvae.

At our indoor production facility in northern Denmark, our closed and fully automated photobioreactors operate under a continuous 24/7 regime to produce a high and stable yield. To eliminate any risk of waterborne pathogens and contaminants being brought into our cultures via collected seawater, we formulate and use only our own artificial seawater throughout the production process.

flexibility in our bioreactor"s control and lighting systems also enables the setting of the optimal growth parameters for each individual strain, this so the desired nutritional profile of the strains can be formed. These cultivation procedures in combination with gentle harvesting, dewatering and packaging processes guarantees nutritious and bio-secure concentrated paste products with very high cell survivability and almost purely intact cells.

Our R&D team are continuously improving our existing cultivars and develop new ones based on the needs and demands of our hatchery customers. We cooperate with some of the leading universities, research institutes and industrial partners in Europe who assist in developing, testing and quality-assuring our products. This to make sure that every Aquapaste bag produced, packed and shipped from our facility passes our rigid controls.


The Aquapaste product line has been developed to meet the needs from marine fish-, shrimp-, and filtering molluscs hatcheries since microalgae are essential for their operations. Main objectives in the development of the Aquapaste has been to bring out a product line that is easy to use, behaves like fresh microalgae in the water column, provides the desired nutritional values as well as offering value-for-money to the hatcheries.

All products in the Aquapaste range are supplied as concentrated paste, either fresh or frozen. For easy handling, product security and long shelf-lives all products are pre-packaged in conveniently sized poly-nylon vacuum bags that preserves the concentrated paste according to FDA standards of feed packaging. By using insulated cooling and freeze box transporting systems, we are together with our logistic partners able to deliver our products to hatcheries within a few days, regardless of location.

First out in the Aquapaste line has been the Nannochloropsis, a paste with high cell concentration and nutritional profile that provide live prey such as rotifers with the right balance of protein, vitamins and essential fatty acid enrichments. Next to be introduced in the Aquapaste line are diatom and flagellate concentrated pastes, both specially developed to provide shrimp and mollusc larvae with the necessary nutritive values. With a high cell integrity, absolute single cell disparity and great water column buoyancy, all our Aquapaste products has the characteristics and attributes of fresh live microalgae when poured into the culture tanks or Green Water systems.

Easy and convenient

For a hatchery to cultivate sufficient volumes of various species of microalgae required for successful larvae production is often challenging. It is labour and resource intensive and not seldom the most expensive and technically demanding aspect of all operations at the hatchery.

Additionally, there is the imminent risk of culture crashes, which if they occur at the wrong time, can jeopardize the whole larvae production and cause severe monetary losses for the hatchery.

Being able to cultivate microalgae biomass continuously in a closed and fully automized bioreactor system 24/7, not only ensure the bio-security and nutritional values of the Aquapaste. It also enables high production outputs with constant quality levels, which assures stable supply and deliveries to customers. Other fundamental elements in our production processes are the gentle harvesting, dewatering and packaging, which guarantees very high cell survivability and intact cells in the Aquapaste. This is of great significance as low numbers of broken cells greatly reduces the formation of biofilms in the culture tanks as well as minimises the creation of free oils on the water surface.

Through always having products in stock at our warehouse, we are able to offer just-in-time deliveries and supply our customers with the best service, highest quality products and making sure our customers" needs always come first, without compromising.

by David Erlandsson, Co-founder of Aliga Microalgae, Denmark

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