The raw material for oily fish plants and animal rendering plants must be properly cooked to 95 °C and pressed for good separation to solids – press cake and press water.
The best press in the industry is the TWIN SCREW PRESS that use two intertwined screws that move slowly ( 3 to 5 RPM) in opposite directions and prevent rotation of the raw material.
The press cake solids go to the dryer to make dry meal
The press water liquids (press water) which consist of water and fats must be further separated in a 2 or 3-phase decanter and separated to: fat/oil, stick water, some meat sludge (to dryer).
Note that larger pieces of raw material must first be hogged or pre-broken to about 25mm particle size to ensure better cooking and pressing.
The ASTW Twin Screw Presses have the following advantages:
All parts and surfaces that are in contact with raw material are made from stainless steel. The frame and gearbox housing is extremely robust and made from steel plates up to 40mm thickness.
The reduction gear box is of brand SEW and is shaft mounted for easy mounting, better reliability and extremely low friction which gives low electric consumption.
The dividing gear is mounted with 6 very large roller bearings in oil bath for high reliability and long lifetime. The motor has variable speed by inverter and the screws rotate 1 to 5 RPM.
The screens are either 2mm thin screen with 10mm backing plate – or 12mm solid screens that are step-drilled, for raw materials with high bone content.
Operating speed should ideally be about 75% of nominal capacity, but the presses can run faster if needed.
Twin Screw Presses: Max. (nominal) capacity in tons input/hr: 2.3 – 3 – 6 – 10 – 18 – 25
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.
