LOW TEMP RENDERING
A & S THAI WORKS CO., LTD
Low Temperature Rendering plants – LTR: for continuous processing of by-products such as bovine (beef), ovine (sheep) or chicken into high quality meat and bone meal and tallow.
The LTR process include the following data:
The low temp rendering process is the gentlest method of treating animal by products and originates from fishmeal processing.
- The material is scanned for steel scrap in a metal detector, pre breaker and fine pre breaker the material into small pieces about 25mm.
- The material is then cooked in a continuous pre-heater/cooker at temp. 95 deg. C
- The cooked material is pressed in a slow rotating twin screw press to separate press cake and press water which is separated to stick water and tallow in a 3- phase decanter and purifier separator. The solid are dried to meat and bone meal in a disc dryer and tallow is purified (polished), and can be further vacuum dried to remove all traces of water. The meal is cooled and ground in a hammer mill for storage.
- The greatest advantage of the gentle Low Temp Rendering process is that the chicken meal and oil is of high quality if fresh raw material.
- Another advantage is that all components in this plant has low wear, so that the lifetime of the plant can be 15-20 years without major overhaul.
Note that the fast rotating decanter and separator have higher wear and will need normal servicing every 1-2 years.
- The low temp process allow the use of WHE – waste heat evaporator to save up to 50% of the steam consumption (which is not possible with the HTR – high temp process) to get a steam consumption 550-600 kg steam/ 1 ton raw material.
Main advantages:
The LTR plant produces a quality meat and bone meal and tallow and allows the use of WHE – waste heat evaporator that reduces the steam consumption by up to 50%, allowing steam consumption to be 550-600 kg steam per 1 ton raw material at about 65% moisture. All LTR components (except decanters and separators) are slow rotating machines and have low wear for long and reliable lifetime. Components are high quality like SEW gear boxes and Spirax steam equipment, sensors from VEGA and Endress Hauser. No steel material or parts are from low-cost countries.
Technical Specification: ASTW LTR - Low Temperature Rendering
This process consist of the basic components: cooker/preheater – twin screw press – disc dryer – decanter/separator liquid oil/water separation – meal handling/cooling/hammermill – optional WHE to reduce steam consumption – odor control – storage
| Plant size Figures are approximate | Capacity tons input per 24 hr | Steam Consumption ton/hr with stick water in dryer | Steam Consumption tons/hr with WHE waste heat evaporator | Electric kW Installed |
|---|---|---|---|---|
|
LTR 2.5 |
60 |
2.5 |
1.5 |
550 |
|
LTR 5
|
120 |
5 |
3 |
670 |
|
LTR 7 |
168 |
7 |
4.2 |
720 |
|
LTR 10 |
240 |
10
|
6 |
950 |
|
LTR 12 |
288 |
12 |
7.2 |
1,015 |
|
LTR 15 |
360 |
15 |
9 |
1,150 |
Project Lean Fish plant
Low Temp Rendering - LTR 2.5
Capacity 60 ton raw material input per 24 hr.
Low Temp Rendering - LTR 5
Capacity 120 ton raw material input per 24 hr.
Low Temp Rendering - LTR 7
Capacity 168 ton raw material input per 24 hr.
Low Temp Rendering - LTR 10
Capacity 240 ton raw material input per 24 hr.
Low Temp Rendering - LTR 12
Capacity 288 ton raw material input per 24 hr.
Low Temp Rendering - LTR 15
Capacity 360 ton raw material input per 24 hr.
