83results about How to "No solid waste" patented technology

The invention discloses an impurity removing process for rear earth feed liquid and belongs to the technical field of wet metallurgy. The impurity removing process for the rear earth feed liquid includes the following steps that (1) the rear earth feed liquid is preprocessed; (2) the rear earth feed liquid is subjected to three times of replacement in an independently controlled mode; (3) solid-liquid separation and collection of spongy multi-metal enriched products are carried out; (4) low-valence metal ions are subjected to oxidation treatment; and (5) an aluminum element and an iron elementin solid matter produced in the previous steps are solidified. The impurity removing process for the rear earth feed liquid has the beneficial effects that environment-friendly and high-efficiency impurity removing of the rear earth feed liquid is achieved, processing cost is low, higher safety is achieved, and the rear earth loss is less than 0.2% during displacement impurity removing of the rear earth feed liquid; and the lead content in the feed liquid is reduced to 0.005 g / L from 1-2 g / L, the iron content in the feed liquid is reduced to 0.004 g / L from 0.5-2 g / L, the copper content in thefeed liquid is less than 1 PPM after processing, silver, mercury and other trace metal elements capable of being replaced with metal aluminum in the feed liquid can be enriched, the content of sodiumions in the feed liquid is reduced, and the processing difficulty of waste water is reduced.

The invention relates to a sealing method for a curtain type hollow fiber membrane and belongs to the field of water treatment. The sealing method comprises the following steps: fastening one end of a hollow fiber membrane bundle; soaking the fastened end of the hollow fiber membrane bundle with a blocking matter, taking out the hollow fiber membrane bundle and curing the same; inserting one end of the cured hollow fiber membrane bundle into an MBR water collecting tube correspondingly, and bonding and fixing the two; and manufacturing the other end of the hollow fiber membrane. The method comprises the following steps: fastening two ends of the hollow fiber membrane bundle; soaking the two fastened ends of the hollow fiber membrane bundle with a blockage matter, taking out the hollow fiber membrane bundle and curing the same; and inserting two ends of the cured hollow fiber membrane bundle into MBR water collecting tubes correspondingly, and bonding and fixing the two. According to the sealing method provided by the invention, the tail end of the membrane silk does not need to extend into the water collecting tubes, so that the utilization ratio of the membrane silk is increased; the water yield end does not need to be cut, so that solid wastes are not generated; the packaging matter can be dissolved in water, and only needs to be dissolved out with water after the hollow fiber curtain type membrane is manufactured, and the dissolved-out package matter can be recycled.