净菜保鲜有高招儿

Core Viewpoint - The article highlights the innovative methods employed by Hebei's Lidu Agricultural Ecological Technology Industrial Park to preserve the freshness of vegetables during the processing of ready-to-eat fresh-cut vegetables, emphasizing the importance of cold chain logistics and meticulous processing techniques [1][2][3][4]. Group 1: Freshness Preservation Techniques - The first step in preserving the freshness of vegetables is rapid pre-cooling, where freshly harvested vegetables are placed in a cold storage for 12 hours to lower their surface temperature to 4°C, inhibiting microbial growth and retaining moisture [1]. - The processing of vegetables occurs in a low-temperature environment, where they undergo sorting, cleaning, cutting, and packaging, effectively slowing down microbial growth and preventing spoilage [2]. - The cleaning process is critical, utilizing a fully automated washing line capable of cleaning 20 tons of vegetables daily while conserving 60% of water, ensuring thorough cleaning without damaging the leaves [2]. Group 2: Product Quality and Logistics - Many products from Lidu Industrial Park are ready-to-eat fresh-cut vegetables, which require strict standards for freshness, cold chain transport, and packaging to maintain quality [3]. - The company operates 60 cold chain logistics vehicles that maintain a low temperature of 4°C during transportation, addressing the challenge of preserving freshness during the final delivery phase [3]. - During the peak demand period around the Spring Festival, the processing volume of fresh-cut vegetables increased to 30 tons daily, supplying various restaurants and households in Beijing [4].