Choose a language



Effects of liquid potassium diformate (FISHFORM) as acid-based preservative for the storage control of sardines under tropical conditions.

Almost a third of the fish caught worldwide is not used for direct human consumption, but is converted into fish meal or fish oil for further application in animal feed. Of the 75 million tons of fish about 25 million tonnes is therefore handled and processed in other ways than fresh, frozen, smoked or canned (Balios, 2003). Read more here (please be patience; file is 2.5 MB; please look at the pages 7 and 8).


Figure 1
Figure 2
Figure 3a
Figure 3b
Figure 4

FISHFORM PLUS – a product to prolong freshness of trawled trash fish caught for fishmeal production, has been tested in a large scale experiment by ADDCON experts onboard during 10 days trawl operation in the Gulf of Thailand in July 2009 (Figure 1). The catch consisted mainly of pelagic and benthic species, such as anchovies (Stolephorus sp.), croakers (Pennahia sp.), scads (Seraloides sp.) and pony fishes (Secutor sp.)

FISHFORM PLUS has been applied at a 1 % concentration with 10 % crushed ice (Figure 2). Results show significant (P < 0.05) freshness prolongation of trash fish prior to fishmeal production obtaining a total volatile basic nitrogen (TVBN) of 93.24 mg / 100g from raw fish treated with FISHFORM PLUS and processed into fishmeal of 216.25 mg  / 100g compared to 142,90 mg  / 100g and 345,97 mg  / 100g of raw fish and fishmeal not FISHFORM PLUS treated, respectively.

Dry matter content ranged 4 to 6 % significantly higher for FISHFORM PLUS treated raw fish and processed fishmeal compared to untreated samples, thus, indicating higher yields of fishmeal additionally to better fishmeal quality. Further, trash fish treated with FISHFORM PLUS did not effuse the strong warm-sweet smell as untreated trash fish.

Thus, handling of FISHFORM PLUS treated trash fish onboard and its processing at the fishmeal factory is strongly alleviated. FISHFORM PLUS treated trash fish stayed better in shape (Figure 3a) compared to untreated fish after the 10 days trawl operation (Figure 3b). Both observations indicate the advantages in applying of FISHFORM PLUS to respective trash fish.

As fish decomposes a lot faster under tropical compared to moderate climate conditions, applying FISHFORM PLUS contributes to prolong freshness of marine catches as well as increases processed fishmeal quality (Figure 4).

In Summary – applying FISHFORM PLUS to trash fish will result in:

> Significant freshness prolongation of trash fish

> Higher yields of fishmeal

> Better fishmeal quality

Annual Conference of IFFO in Vienna, Austria

Chrisitan Lückstädt

Experts from ADDCON have been invited to speak at IFFO's (International Fishmeal and Fish Oil Organization) annual conference, which took place in Vienna from October 5th till 8th 2009. Dr. Christian Lückstädt has been asked to share his experience on "Improving fish quality for fishmeal production".

In the technial Meeting, Dr. Christian Lückstädt presented ADDCONs expertise on "Utilisation of organic acids for the preservation of fish prior to processing into fishmeal".

please click here to read the whole article:

Fresh fish for high quality fish meal


Here is a new article of our Dr. Christian Lückstädt and Dr. Kai Kühlmann about our product FISHFORM and its effects of potassium diformate on the quality of fish under tropical conditions.

"Almost one-third of the world fish harvest is not used for direct human consumption, but is converted into fish meal or fish oil for further application in animal feed. Of the 75 million tons of fish about 25 million tonnes is therefore handled and processed in other ways than fresh, frozen, smoked or canned (Balios, 2003). The supply of huge volumes of high quality fish meal is necessary to supply the aquaculture industry, which has been growing with around 8.8% annually since the 1950ies (FAO, 2007). It was recently estimated that 25% of the produced fish meal world-wide comes from usage of waste from the fish processing sector (FeedInfo, 2009). The world-wide supply of fish meal is presently stable at 6 to 6.5 million t a year. On the other hand the percentage of high quality fish meal of the total amount of fish meal is expected to grow from 8% to 50% during the next 30 years (Hydro Norway, 2000). However, according to an report (2001), access to premium quality fish meal, without dehydration damage to proteins and / or rotting which make the final product rancid, is still limited......."

here you can read the whole article


Sommart Lohmah and Dr. Kai-J. Kuehlmann
Sommarth Lohman and Dr. Kai Kuehlmann

Addcon has begun introducing its product range based on formic acid for use as natural growth promoters in livestock and aquatic species and as a natural preservative for by-caught fish and fish by-products intended forfishmeal production in South East Asia.

The company's two application managers, Dr Kai-J. Kuehlmann and Dr Karsten Schroeder, visited ten potential customers in the Philippines duringApril-May 2009 to introduce Aquaform, a growth promoter, and Fishform Plus, a fish-preservative, to CEOs and technical personnel in the production and sales teams of various feed mills and trading firms in Manila, Negros province and Cebu.

Dr Kuehlmann said Addcon products are new to the Southeast Asian market, thus, information about those innovative 'green chemicals' are of great interest to the industry.

"The introduction of Addcon's fish-preservative Fishform Plus would be advantageous to the Philippine tuna industry in Mindanao. Tuna can be preserved in its freshness on the one hand, and would save handling cost on the other," said Malcolm Sarmiento, National Director of the Bureau of Fisheries and Aquatic Resources.

By applying Fishform Plus to the offal obtained from tuna catches, massive costs on ice storage and electricity -traditionally used up to present -could be saved as this preservative maintains the by-products' freshness and protein quality for several days. Subsequently, the quality of the fishmeal produced from 'preserved' raw materials can improve significantly.

Although customers were impressed by the potential of the various products regarding improved health condition and growth performance, verification trials under local climate conditions are still in demand. Thus, grow-out trials for tilapia and milkfish are being prepared to test different concentrations of Aquaform added to the respective compound feeds.

To demonstrate the prolonging freshness effects of Fishform Plus under tropical conditions, a local trial with freshly caught fish is being conducted in Cebu, while product focus seminars are planned for the tuna industry in Mindanao (Southern Philippines) and the trash fish processors and fishing operators in Negros.

In Thailand, Addcon has conducted a feeding trial for Aquaform in tilapia fingerlings at Nam Sai Farm outside Bangkok and found an improvement in survival rate over the control group.

A new approach to fishmeal production

Fishmeal production

In the context of overfishing and the need for continued use of fishmeal, the economical utilization of fishery by-products from tuna-fisheries has gained importance. 
This is gaining more ground on the basis that high quality trash-fish is a major compound in the production process of high-value animal- and aqua-feeds. Even though the ratio of fishmeal inclusion in modern feed formulations is continuously reduced in favor of other protein carriers, the tantamount importance of well preserved Industrial fish as the precursor to fishmeal must not be neglected.

Sardine canning process

Tuna-fisheries is exclusively aiming at high value cuts, most famous as ‘sashimi'; yet other parts are well recognized and yield high prices at the world market, among others as canned products. About 40% of the fish however is used -as by-product from processing- for the production of fish meal only. As it has been the custom since generations in Asian countries, whole round tunas are being frozen at about -20°C for compliance with high import standards and regulations imposed by markets overseas, among those most importantly Europe, Japan and the US. However, the fact that industrial fish intended for fishmeal production does not require the same postharvest standards apparently has been overlooked for quite some time.

By freezing head, tail, innards and other body parts goes on account of storage volume in the ice hold/ cold storage of the fishing vessel. Additional expenditures in terms of energy costs for freezing and the pre-cooking process (before the fish go to the fish cannery) are encountered needlessly. This means giving away a sizable profit that is quite easy to attain by using FISHFORM PLUS, an efficient preservative from ADDCON, leading the way for preservation of valuable raw materials.

In the sardine-processing and canning industries, by-products are mostly derived as residues from the canning process and as rejects, being off size or too small. While the first is processed into head-and-tail fishmeal, the latter -as the product of whole round fish- yields high prices on the national market due to its high protein content. Additionally, unexpected big catches at times yield sardine volumes that cannot be processed by the canneries in due time, therefore being used as raw materials for high-protein content fishmeal production. In all cases, maintaining relative freshness during the post -fishing-operation process, particularly on transit from fishing ground to the port is dearly paid with high costs for chilling through ice application.

Also in this case ADDCON sees high potentials for the application of FISHFORM PLUS as a valid and economical very viable alternative for guaranteeing the high quality of fish meal as a precursor for prime animal- and aqua-feeds.