5 results about "Hazardous waste" patented technology

The invention discloses a double-alkali neutralization treatment method of heavy metal-containing acidic wastewater. According to the double-alkali neutralization treatment method, sodium hydroxide is mainly used for adjusting a pH value so that metal ions in acidic wastewater form precipitates, the precipitates are recovered, the recovered metal sludge is treated and then can be used as metal oxides for next use, through lime use, fluorine ions in the wastewater form precipitates, and the precipitates do not contain heavy metals and can be treated by a common sludge treatment method. The sludge treated by the double-alkali neutralization treatment method is not used as dangerous waste or can be used as a fluorite-like accessory material, and the rest of the wastewater satisfies discharge standards by slight treatment.

The invention relates to an oxidative degradation method for cyanide in cyaniding tailings. The oxidative degradation method comprises the steps that the mass percentage of the water content of the cyaniding tailings obtained after filter pressing is controlled to be 20-30%, stirring is conducted, and three or more of cement, aluminum powder, sulphur powder, sodium perborate and sodium chloride are added, wherein the amount of added chemicals accounts for 2.2-7.7% of the dry weight mass percent of the cyaniding tailings; a trolley is loaded with the materials and then put into a high-pressurereaction still, and after vacuum extraction is conducted on the materials in the high-pressure reaction still, steam is introduced; and after the temperature is raised to 180-200 DEG C, the pressure is maintained for 4.5-10 hours, depressurization is conducted so that the ammonia-containing steam is exhausted, and the residual cyaniding tailings in the high-pressure reaction still can be convertedinto another type of ordinary solid waste through hazardous waste toxicity identification. The degradation method is good in cyanogen removal effect; cyanogen removal is irrelevant with the initial concentration of cyanogen and is relevant with the time and temperature; the cyaniding tailings obtained after treatment can meet the environment protection requirement and be directly reused as a secondary resource; and by means of hazardous waste toxicity leaching identification, the PH value is 7-9, and the density of the total cyanide is 2 mg/L.

The invention relates to a dangerous waste positioning and recycling system based on the RFID technology. The dangerous waste positioning and recycling system comprises an RFID positioning system, aninformation processing system and a display system. The information processing system analyzes whether the dangerous article becomes dangerous waste or not according to the position information and the product information of the dangerous article acquired by the RFID positioning system, and pushes the position information and the product information of the dangerous waste to the display system; and the display system displays the position information of the hazardous waste and the product information. According to the positioning and recycling system for the dangerous waste, after the dangerous waste is lost, the dangerous waste can be positioned through the RFID system in the system and then recycled after being judged to be changed into the hazardous waste, and therefore the problems that when the dangerous waste is lost, positioning tracking cannot be achieved, and the ecological environment is polluted are effectively prevented.