Low-temperature Membrane Concentration Technology for Orange Juice Processing

Membrane concentration is a reliable low‑temperature technology widely adopted in orange juice processing, solving many defects of traditional thermal evaporation. Conventional evaporation requires high temperature and long heating time, which will degrade vitamin C, damage natural citrus aroma, and cause cooked off‑flavor, greatly lowering the quality of orange juice concentrate. In contrast, cross‑flow membrane concentration runs at near room temperature, avoiding thermal degradation of heat‑sensitive nutrients and flavor substances, so the fresh, natural taste of orange juice can be retained to the maximum extent.

The complete process consists of clarification and concentration. Firstly, microfiltration or ultrafiltration is used to filter out pulp, suspended solids, pectin colloids and other impurities, achieving juice clarification. After pretreatment, the clear orange juice enters the reverse osmosis membrane unit. Under proper pressure, water molecules are separated through the membrane, while sugar, acids and flavor compounds are trapped to increase the soluble solid content of juice.

Our skid‑mounted membrane system offers great flexibility. It can be used for laboratory small‑scale tests, pilot trials and subsequent industrial scale‑up. The equipment features low energy consumption, simple operation and automatic CIP cleaning, which helps reduce labor and steam costs for juice plants.

For orange juice manufacturers, this membrane process helps produce concentrate with bright color, balanced sour‑sweet taste and rich fresh aroma. It meets the growing market demand for premium, clean‑label fruit juice products and brings better economic benefits to fruit processing enterprises.