Membrane Separation Technology for Rosa Roxburghii (Cili) Juice Processing

Membrane Separation Technology for Rosa Roxburghii (Cili) Juic

Rosa roxburghii (Cili, chestnut rose) juice is well‑known for extremely high Vitamin C, SOD and antioxidant compounds. However, its industrial processing faces classic pain points: colloidal impurities, pectin and fine pulp particles easily cause post‑precipitation and haze. Thermal evaporation will degrade heat‑sensitive nutrients and destroy natural fruit flavor.

Membrane separation technology brings an efficient physical solution for cili juice production, including cross‑flow ultrafiltration clarification and nanofiltration ambient‑temperature concentration. Without adding filter aids such as bentonite or gelatin, pressure‑driven semi‑permeable membranes separate impurities by molecular weight difference at room temperature.

Ultrafiltration for Juice Clarification

As shown in our lab test samples, ultrafiltration removes macromolecular pectin, protein, pulp residues and colloids from raw cili juice. The obtained permeate is bright and transparent. It effectively avoids later turbidity and sediment during storage, greatly improving product stability.

Different molecular weight cut‑offs (50 kDa, 75 kDa and so on) can be selected according to customer targets: retain partial fruit aroma macromolecules or pursue maximum clarity. The whole process runs at ambient temperature, no heating, no chemical additives, keeping original taste and active ingredients of cili juice.

Nanofiltration Low‑Temperature Concentration

After ultrafiltration clarification, nanofiltration membrane system concentrates cili juice under low temperature. Water and partial small‑molecule salts pass through the membrane, while Vitamin C, SOD, flavonoids and antioxidants are well retained. Compared with traditional thermal evaporators, membrane concentration cuts energy cost significantly and prevents thermal decomposition of heat‑labile nutrients.

Core Advantages of Membrane Solution for Cili Juice

1. Room‑temperature operation: Protect heat‑sensitive VC, SOD and natural fruit flavor.

2. Physical separation only: No fining agents, safer for food‑grade production.

3. Solve post‑precipitation: Remove colloids to stabilize finished juice.

4. Lower energy consumption: Replace high‑energy thermal evaporation for pre‑concentration.

5. Flexible custom: Adjust membrane MWCO for different end‑product requirements (beverage, raw material concentrate, extract).

Typical Process Flow

Raw Rosa roxburghii juice → Pre‑filtration → Ultrafiltration clarification → Nanofiltration concentration → Cili juice concentrate for beverage / further processing.

For beverage factories and fruit deep‑processing enterprises, integrated membrane separation line upgrades cili juice quality while lowering overall operating cost.