4results about How to "Resolve disposal issues" patented technology

This invention discloses a ceramic filter media based on Yellow River sediment. By mass percentage, the ceramic filter media comprises the following components: 66-82 wt% Yellow River sediment, 9-15 wt% high-alumina bauxite, 3-7 wt% iron oxide, and 6-12 wt% sodium-based bentonite; the mass ratio of SiO2, Al2O3, and Fe2O3 in the above system is 40-58:8-20:5-12. This application provides a high-value-added utilization method for Yellow River sediment, realizing the resource utilization of Yellow River sediment and solving the problem of Yellow River sediment disposal. The ceramic filter media prepared in this application has wide applications, including in wastewater treatment processes such as aerated biological filters and constructed wetlands. By utilizing solid waste to treat water pollution, it achieves "treating pollution with waste."

The utility model relates to the technical field of wastewater treatment, in particular to a recycling defluorination crystallization device, which comprises a reaction tank body, a water outlet area, a settling area, a water inlet area, a mixing area, a stirring component, a first-stage reaction area and a second-stage reaction area. The method is suitable for all medium-high-concentration fluorine-containing wastewater, the effluent quality is excellent, the fluoride concentration can be lower than 1mg / L at the minimum, fluorine resources of incoming water can be fully utilized, waste is turned into wealth, fluorine-containing sludge is not generated, economic benefits can be generated, and the problems that a traditional fluorine removal process is large in agent dosage, large in sludge yield, and whether the sludge is hazardous waste or not needs to be identified are solved; and the process has the advantages of small agent dosage, high facility integration level, small occupied area, reduction of the operation cost of a sewage plant and simplicity in operation and maintenance, not only solves the problem of fluorine pollution of the fluorine-containing wastewater, but also can solve the problem of fluorinated sludge treatment, and has certain popularization value.

This invention provides a method and system for reducing the color of coking wastewater concentrate, belonging to the field of wastewater treatment. It aims to solve the problems of incomplete decolorization and easy color reversion that exist when using advanced oxidation methods to decolorize coking wastewater concentrate. The method includes: Step 1, adding persulfate to the wastewater to carry out a first-step reaction, obtaining a primary treated liquid; Step 2, transferring the primary treated liquid to an irradiation device for irradiation treatment, obtaining a secondary treated liquid; Step 3, collecting the ozone generated in the irradiation device and the secondary treated liquid respectively, and introducing the ozone into the secondary treated liquid, and adding ferrous salt, to carry out a final reaction, so that the color of the wastewater is reduced to less than 10 times.

The application discloses a kind of resource processing technology of nickel-containing etching waste liquid, comprising the following steps: S1, pretreatment: adding lye to nickel-containing etching waste liquid to adjust pH to 3.5~4.0, then heated stirring treatment, again, standing aging treatment, obtain containing nickel fluoride turbidity liquid;S2, centrifugal: the centrifugal treatment of containing nickel fluoride turbidity liquid;S3, main reaction: with hot water to clean nickel fluoride by-product, cleaning wastewater is added to the etching waste liquid after pretreatment, then add hydrofluoric acid to adjust the ratio of ammonium fluoride and hydrofluoric acid to 0.9~1.2:1, after reaction, obtain reaction liquid;S4, concentration;S6, centrifugal;S7, drying: ammonium bifluoride crystal is dried to obtain ammonium bifluoride product.The application controls precipitated nickel fluoride by adjusting process conditions, solves the influence of nickel-ammonium complexation on the direction of treating nickel-containing etching waste liquid by precipitation method by pH control, reduces auxiliary material addition and environmental pollution, realizes resource recycling, and reduces production cost.