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55results about How to "Increase calcium ion concentration" patented technology

Fresh keeping method for fresh chillis or grapes

The invention discloses a fresh keeping method for fresh chillis or grapes. The method comprises the following steps of: spraying chillis or grapes with trichoderma harzianum in a certain concentration one week before harvesting, impregnating the chillis or grapes with calcium salt cooling water in a certain concentration after harvesting, then airing the impregnated chillis or grapes in ventilating cold storage while maintaining the ventilating cold storage with a certain ozone concentration, subsequently putting the treated chillis or grapes into a spontaneous modified atmosphere package and performing sealing with 1-methylcyclopropene or 1-methylcyclopropene and a SO2 sustained release preservative in an airtight condition, tying the package, and then storing the chillis or grapes at low temperature while maintaining the indoor humidity of a fresh-keeping storehouse to be equal to or greater than 90%. According to the fresh keeping method for the fresh chillis or grapes, the previous steps of spraying calcium before harvesting and permeating calcium at normal temperature after harvesting are moved into the pre-cooling step by using the calcium salt cooling water so that the pre-cooling speed is accelerated, the efficiency is improved and the fresh keeping effect is achieved and improved. The method is particularly applicable to storing and fresh keeping the chillis and grapes harvested in a rainy season.
Owner:GUIYANG UNIV

Method and device for efficiently and economically removing antimony in printing and dyeing wastewater

ActiveCN109970278AEnhance the antimony removal effect of coagulationEfficient Antimony RemovalSludge treatmentTreatment using aerobic processesFiltrationSludge
The invention discloses a method and device for efficiently and economically removing antimony in printing and dyeing wastewater. The wastewater enters a reaction tank through an adjusting tank, aciddissolving ferrous sulfate, slaked lime and anionic polyacrylamide are sequentially put into the reaction tank and subjected to a coagu-flocculation reaction; the mixture enters a primary settling tank after reacting, settled sludge is subjected to plate-frame pressure filtration, and separated wastewater enters an aerobic biochemical tank; the obtained product after biochemical treatment enters asecondary settling tank, separated sludge back flows to the biochemical tank, and the wastewater is introduced into a secondary biochemical tank; the wastewater after treatment enters a final settling tank, the separated wastewater is contained in tubes if reaching a standard or is further treated and reused to a workshop, and surplus sludge is subjected to plate-frame pressure filtration to be incinerated. The method is easy and convenient to operate, low in medicament cost and obvious in antimony removing effect, and the final antimony concentration of the wastewater can be stably reduced to 100 micrograms/L or below; aeration of the aerobic sludge tank is fully used, it is promoted that ferrous in the wastewater is oxidized to ferric iron, and a complexing effect and the settling performance between the iron oxide and antimonite are enhanced.
Owner:ZHEJIANG UNIV
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