Membrane Technology for Lemon Juice: Clarification, Cold‑Concentration & Cold Sterilization
Traditional lemon juice processing often depends on thermal evaporation and diatomaceous‑earth filtration, which risk losing fresh aroma, destroying vitamin C and creating cooked off‑flavors. Cross‑flow membrane separation (MF, UF and nanofiltration NF) delivers cold clarification, ambient‑temperature concentration and cold sterilization for lemon juice. Operating under room‑temperature conditions, membrane systems remove pulp residues, pectin, colloids and microorganisms while preserving citric acid, natural aroma compounds and heat‑sensitive nutrients. It helps beverage producers obtain stable clear lemon juice concentrate, cut logistics costs and improve final product quality.
Oilfield Produced Water Treatment by Membrane Separation Technology
Oilfield produced water contains crude oil, suspended solids and organic pollutants, posing challenges for discharge and reuse. Doupu’s membrane separation technology effectively removes oil contaminants. The lab test shows stark visual contrast: raw oily wastewater is turbid brown, while the permeate after membrane filtration becomes clear, and oil plus impurities are concentrated in retentate. This membrane solution enables water recycling for oil & gas plants, cuts operational costs and reduces environmental risks.
Nanofiltration Membrane Low-Temperature Concentration Technology for Botanical Extract Processing
Traditional plant extract concentration mainly relies on vacuum evaporators, which require long-term high-temperature heating. The thermal processing easily causes oxidation, browning and activity loss of heat-sensitive natural active ingredients, resulting in low product quality and low material utilization rate. In addition, thermal concentration cannot remove micro-soluble impurities, leading to high moisture ash content and poor stability of finished extracts. Nanofiltration membrane separation technology adopts low-pressure physical interception to realize efficient water removal and synchronous purification of botanical extracts at room temperature. It concentrates effective components while removing partial small-molecule impurities, greatly improving product purity, color and yield. With the advantages of energy saving, no thermal damage and stable batch consistency, nanofiltration low-temperature concentration has become an indispensable core process in modern plant deep-proce
