Olive Waste Water Decanter Centrifuge for Efficient Waste Water Treatment in Olive Oil Mills

• Customization: Available
• After-sales Service: Video Online Support
• Warranty: 1 Year
• Model NO.: LW/LWS series
• Type: Centrifuge
• Object: Liquid-Liquid-Solid or Liquid-Solid
• Separation Mode: Sedimentation Type
• Operating Type: Continuous Type
• Installation: Horizontal
• Centrifuge Type: Horizontal Spiral Centrifuge
• Pressure: Low Pressure
• Condition: New
• Name: Olive Oil Production Line
• Future: Olive Oil Cold Pressed Line
• Name 2: Fresh Olive Oil Extraction Machine
• Material: SS304,316L
• Core Components: PLC, Bearing, Motor
• Transport Package: Wooden Case
• Specification: According to the model
• Trademark: Shenzhou
• Origin: China
• Package Size: 320.00cm * 130.00cm * 120.00cm
• Package Gross Weight: 3000.000kg

Product Description

Olive Waste Water decanter Centrifuge for Efficient Waste Water Treatment in Olive Oil Mills

Two Phase Decanter Centrifuge

decanter centrifuge is designed for olive oil extraction,mainly for 300-500kg/h olive oil extraction line

Three Phase Decanter Centrifuge

decanter centrifuge is designed for olive oil extraction,mainly for 3000-4000kg/h olive oil extraction line

CAPACITY	500KG/H	2000KG/H	4000KG/H	6000kg/h	10000kg/h
SEPARATION	2-PHASE	2/3-PHASE	2/3-PHASE	2/3-PHASE	2/3-PHASE
SPEED	4200RPM	3600RPM	3300RPM	2800RPM	3000RPM
MATERIAL	SUS304	304/316/2205/2507 (DIN 1.4301/1.4401/1.4462/1.4410)
DIMENSION	2700*800*900MM	3500*1000*1250MM	4200*1200*1300MM	4600*1500*1600MM	4800*1800*1900MM

3 Phase decanter centrifuge is mainly used for solid-liquid-liquid separation, which means to separate a solid phase (with its density being the maximum) with two liquid phases of different densities. Based on a certain differential, the Bowl and spiral revolve in the same direction at high speeds, and the materials enter the equipment through the feeding pipe. Under the action of centrifugal force, the solid matters will deposit to form a sediment layer on the Bowl wall, and the two liquid phases will form a light liquid ring and a heavy liquid ring respectively, successively forming a solid layer, light liquid layer and heavy liquid layer inward from the Bowl wall. The spiral works continuously to push the solid matters on the Bowl wall to the conical end of the Bowl and then discharge them out of the equipment through the slag discharging port. The light liquid phase continuously flows out of the overflow port at the big end of the Bowl, while the heavy liquid phase is discharged out through the centripetal pump also at the big end. Thus, continuous separation of three phases is realized.
Avocado Oil Cold Pressed Line Plant Fresh Avocado Oil Extraction Machine unrefined, extra virgin cold-pressed avocado oil

To have optimal oil quality, avocado fruit should not be overripe and also should have minimal rots or other postharvest disorders (such as flesh greying due to long storage).
The amount of oil extracted from mature and ripe avocados earlier in the season has been found to be only approximately 75% of the maximum available oil in the flesh (15% oil by fresh weight) compared to later in the season when it is possible to extract more than 90% of the available oil, this being the maximum oil yield (≈25% oil by fresh weight).

 

EXTRACTION OF AVOCADO OIL
The process for recovering oil from ripe avocados is a mechanical extraction, similar to olive oil extraction, with the additional step of removing the skin and stone (seed).

After this, the flesh is ground to a paste and then malaxed for 40-60 minutes at 45-50°C. This is a higher malaxing temperature than used for olive oil extraction, but it is still considered to be cold-pressed extraction for avocado oil. The slightly higher temperature aids the extraction of the oil from the oil-containing cells and does not affect the quality of the oil.

The oil and water phases are separated from the pulp using a high-speed decanting centrifuge, and then the oil is separated from the water in final polishing centrifuges. The pulp from the decanting centrifuge and waste skin/seeds are returned to orchards for soil conditioning and mulch, or used as animal feed. 

Avocado oil, if extracted from sound fruit (no rots, physiological disorders, or damage), will result in oil with a very low percentage of free fatty acids (%FFA) (<0.5% as oleic acid). Also, the peroxide values (PV) can be very low (<2 meq/kg). Recommended standards for extra virgin avocado oil have proposed a maximum PV of 4 meq/kg (Table 1).
 
In sound, ripened fruit, the level of lipolysis that occurs is low, resulting in low %FFA. The fruit does not need to be processed immediately after ripening, but long delays should be avoided. Generally a higher %FFA is due to poor-quality fruit, delays in processing ripened fruit, or poor manufacturing practices.

1. Fruit washing process 
The first washing is performed by immersion in order to remove dust from the surface of the fruits. The soft water flow generated by a jet system gathers fruits by a plastic bucket elevator, which has two functions, i.e., washing fruits a second time by showering them and working as a water dripping.

2. Fruit depulping process 
The elevator takes then the fruits into the destoning machine,where pips and around 90% of skin are separated from the pulp. Skin separation needs to be calibrated according to the desidered quality, since the proportion of skin into the processed mash may affect the pigment composition of avocado oil.

3. Pulp crushing process 
The pulp (which is crushed during destoning) with a variable proportion of skin is pumped into a disc crusher for further refining. The disc crusher rotates continuously at 1400 rpm.The disc crusher is important to cut the filaments remained in the paste and, at the same time, to minimise the emulsion.

4. Horinzontal malaxing process 
After crushing, the avocado mash is pumped into the section equipped with malaxers (kneading machines). Each kneading machine consists of a stainless steel tank with a central screw stirring the mash slowly and continously at a monitored temperature.

Small oil drops released during fruit milling merge into large drops that can be easily separated by centrifugal extraction.In the case of the avocado mash, our experience showed that malaxing time should not exceed 90 min and temperature should be below 50°C.

5. Oil-water-poamce separation 
The separation of oil from solid and liquid phases is done using a decanter centrifuge. This device exploits the centripetal acceleration to separate continuously a mixture of particulate solids and liquids with phases having different densities. Seems that the best decanter centrifuge applicable to extraction is the three phase version.

In this machine, the mash coming from kneading is fed into the machine together with about 10-20% of hot water (at the same temperature as the mash) depending on the characteristics of product. The mash inside the centrifuge is separated into oil, vegetation water and solids (exhausted pulp and residual skin).

The oil phase and the water phase are collected separately under the decanter. The oil phase is pumped out to a vertical purifier centrifuge, while the water phase is pumped out to a vertical concentrator centrifuge.

6. Oil purification and recovery 
The flowing from the decanter still has a certain amount of water and solids. Vegetation water from the decanter should still contain a small quantity of residual oil. The system consists of a disk stack centrifuge for final purification to remove residual water and solids. A second disk stack centrifuge should be used to recover residual from the vegetation water flowing from the decanter.