70 percent of the aquafeed is for local growers, the rest of the feed is exported to countries in Africa, South America and South East Asia. For export, the feed is packed in 15 and 25 kg bags, which are loaded in containers then the fish feed is transported over the world from Haifa port. Today, the pellets for floating, sinking and slow sinking purposes, are produced between 1.5 - 9mm; smaller sizes are produced using a crumbler.
Kinds of products
Aquafeed is produced for several kinds of sweet water fish: tilapia, carp, mullet, and trout, sturgeon. And for saltwater fish: seabream, seabass and black tiger shrimps. Extrusion and processing take place in a production facility that is completely separated from the feed mill. This ensures a hygienic surrounding without risk of contamination. The production area of the fish feed is situated in a new extension of the animal feed plant. Zemach Feed Mill produces the feed under the quality systems HACCP, ISO 9001 and Global Gap in conjunction with the Ginnosar, Dor and Sea Agriculture Institute Research Stations. Quality analyses of raw materials and finished products are made in Israel and if desired abroad. All products must pass physical tests; these are designed to examine the pellet strength, dust percentage and sweet/salty water tolerability. Production of pet food on the same production line was approved by Israeli Standards Institute and by the veterinary services of Israel, whilst Zemach ensures the separate identity of the products. Due to extensive research and knowledge of Tilapia Zemach has quickly become an authority on this particular feed. Counselling is provided by the experts on a worldwide scale.
in optimal condition. Two-third of the steam production, which is 2.5 tph, is available for the fish feed production. The energy consumption of the extrusion lines is approx. 70 kWh/ton as an average. Because of the conversion from butane gas to natural gas in this year the costs for the energy will be substantially reduced.
Zemach produces tailor made fish feed; the growers receive the data of raw materials with analyses and prices and in this way they can create their own specific formula. Assistance can of course be given if desired. Over the years, this flexibility showed important advantages, because the circumstances in the farms are quite different.
Zemach Feed Millâ€™s management is ambitious to become a more important local and international player. Mr Braun and Mr Tal are both working daily to achieve the best product quality and to be become increasingly known in the international market. These are realistic goals; the attitude and the knowhow of these specialists will serve this objective.
The production lines
Two completely individual production lines continuously produce the aquafeed simultaneously, six days a week, 24 hours a day. In the past, the grinding process took place in two steps: first coarse grinding and then another hammermill reduced the particles up to 0,9-1,0 mm. An acceptable process but suffering from a disadvantage as the second grinder was often blocked by the fine meal entering the mill without bigger particles to clean the sieve. The result was blockage of the airstream with low passing fraction and high-energy figures. Now the grinding takes place in one step with the possibility to grind meat and bone meal (from poultry) and fishmeal as well. The fishmeal content of the feeds varies between 0-60 percent. Extruder line one produces 10 tph for floating pellets, the capacity of the second line for floating pellets is seven tph; this is restricted because of the limited capacity of the dryer. The two single screw extruders are type Wenger X 185 and X 235. The last one is quite new. This extruder replaced, five years ago, an extruder of another make. Zemach was not content with the now dismantled extruder; another reason is the fact that the spare parts of the two Wenger machines are mainly similar. Extruder line one consists of a Wenger dryer, an atmospheric coater and a counter flow cooler. On this line, the pet food is produced as well and the coater is suitable for adding flavours, colours, powders etc. Extruder line two consists of a Wenger dryer; a vacuum coater and a counter flow cooler as well. The separation of fines and large particles takes place by a rotating drum sieve in order to guarantee that the pellet product is
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International Aquafeed - November 2017 | 25
Published on Nov 9, 2017