are machines designed to transport raw materials, cooked materials, and press cake between process steps in industries like rendering and fish meal production. They consist of a screw, a U-shaped or circular trough (often with a wear-reducing liner), and a gear motor drive. While conveyors can be up to long, they are typically flanged for transport in containers. They can also perform ancillary tasks like pre-heating, cooling, or draining fat/water.
ASTW has worked for over 11 years to make efficient and reliable vertical screw conveyors to lift dried meals to be stored in bins and silos, and also for continuous re-circulation and cooling of the meal in the bin.
Key-hole type screw conveyors is the best solution to transport large pieces of un-hogged raw material from abattoir to the rendering plant bin, such as large bones, rib cages and cattle heads. Lamella pumps require pre-hogging and do not pump dry material very well and have high wear and maintenance costs, and occasionally clog up.
A good example is a meat processor in Melbourne: in 2015 they installed 150 meters of key hole, 500mm diameter screw conveyors from abattoir to the raw material bin, installation partly indoor and partly outdoor.
ALMOST AN “INSTALL AND FORGET” INSTALLATION EXEPT FOR OIL CHANGE FOR GEARS AND BASIC MAINTENANCE.
The raw material is un-hogged to reduce deterioration, and the material is only hogged or pre-broken just before entering the processing machinery.
It is important to air-cool fishmeal just after drying. The reason is to avoid
oxidation and self-heating of the fishmeal and to make the fishmeal par-ticles
more free-flowing and brittle before grinding. Rendering materials are less
sensitive.
The option to cooling conveyor is to use a dedicated meal cooler, which in any
case will be used for larger capacities.
For plant size under 60 tons input per 24 hours one can, to save cost, use one or
two units of combined screw conveyor and meal cooler in one unit. One cooling
screw conveyor is mounted after the drier and one unit after the hammer mill,
and both units cool down the fishmeal by airflow, connected to a cyclone and
blower. The warm air outlet can be ducted outside the factory into a water
scrubber or bio filter to reduce any smell from the meal.
It is important to air-cool fishmeal just after drying. The reason is to avoid oxidation and self-heating of the fishmeal and to make the fishmeal par-ticles more free-flowing and brittle before grinding. Rendering materials are less sensitive. The option to cooling conveyor is to use a dedicated meal cooler, which in any case will be used for larger capacities.
For plant size under 60 tons input per 24 hours one can, to save cost, use one or two units of combined screw conveyor and meal cooler in one unit. One cooling screw conveyor is mounted after the drier and one unit after the hammer mill, and both units cool down the fishmeal by airflow, connected to a cyclone and blower. The warm air outlet can be ducted outside the factory into a water scrubber or bio filter to reduce any smell from the meal
Proven success across 300+ installations worldwide. Discover how ASTW’s turnkey fishmeal and rendering solutions have helped global clients achieve superior efficiency, reduce operational costs, and exceed environmental compliance standards.
ASTW delivered a turnkey fishmeal plant in eastern Thailand, designed for lean fish and marine by-products. The project included full installation, energy-saving systems, and odor control to comply with local environmental regulations. Key Equipment 3-Phase Decanter LTR Disc Dryer Preheater Twin Screw Press WHE
Proven success across 300+ installations worldwide. Discover how ASTW’s turnkey fishmeal and rendering solutions have helped global clients achieve superior efficiency, reduce operational costs, and exceed environmental compliance standards.
Our fishmeal and rendering plants process various raw materials including fish waste and by-products, poultry offal and feathers, beef and pork by-products, mixed animal waste, and seafood processing waste. Each plant is customized for specific material types to ensure optimal processing efficiency and product quality.
Yes, ASTW delivers complete turnkey solutions including engineering design, equipment manufacturing, worldwide shipping, on-site installation, system commissioning, operator training, and ongoing technical support. Our 40+ certified technicians handle projects from concept to full operation across 36+ countries.
We provide comprehensive 24-month equipment warranty, 5-year major component guarantee, lifetime technical support, global spare parts availability, preventive maintenance programs, and 24/7 emergency service. Our service network ensures minimal downtime and maximum plant performance.
Absolutely. Our plants include advanced odor control systems (biofilters, scrubbers, thermal oxidizers), environmental monitoring equipment, waste heat recovery systems, and compliance with international environmental standards including EU, EPA, and local regulations worldwide.
Emergency spare parts are available within 24-48 hours for critical components through our global distribution network. Standard parts ship within 5-7 business days. We maintain strategic inventory locations in Asia, Europe, and Americas to ensure rapid delivery worldwide.
Our plants range from 50 tons/day for smaller operations to 600+ tons/day for large-scale industrial facilities. We design custom solutions based on your raw material volume, product requirements, site conditions, and future expansion plans.
