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2 results about "Waste pond" patented technology
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A waste pond or chemical pond is a small impounded water body used for the disposal of water pollutants, and sometimes utilized as a method of recycling or decomposing toxic substances. Such waste ponds may be used for regular disposal of pollutant materials or may be used as upset receivers for special pollution events. Often, chemical ponds themselves are addressed for cleanup action after their useful life is over or when a risk of groundwater contamination arises. Peak usage of waste ponds in the United States occurred in the period 1955 to 1985, after which the environmental risks of pond technology were sufficiently understood, such that alternative technologies for waste disposal gradually began to displace many of the waste ponds. Waste ponds often have pond liners, such as concrete or robust synthetic polymeric materials, to prevent infiltration of chemicals to soil or groundwater.
A stainless steel pickling wastewater recycling treatment system and method
PendingCN122102407AWater contaminantsTreatment with anaerobic digestion processesChemical treatmentSludge
The application provides a stainless steel pickling wastewater recycling treatment system and method, and belongs to the technical field of wastewater treatment.The method comprises the following steps: step one, preliminary removal of heavy metals and fluorine ions by a heavy metal capturing tank and a calcium carbonate industrial solid waste tank;step two, deep removal of heavy metals and fluorine ions by a crystallization fluidized bed;and step three, synchronous removal of sulfates and nitrates by a microbial method.The application organically combines physical and chemical treatment with biological treatment, can synchronously and efficiently remove various pollutants such as nickel, chromium, iron, thallium, fluorine, sulfates and nitrates in the stainless steel pickling wastewater, has good treatment effect, the effluent water quality can meet the recycling requirements, realizes the resource utilization of wastewater, reduces the waste of water resources, realizes the synchronous and efficient removal of various pollutants, reduces the treatment cost by the resource utilization of calcium carbonate industrial waste and CO2 gas, reduces the sludge yield, the effluent water can meet the recycling requirements, and has economic benefits and environmental benefits.
Owner:GUANGXI ENVIRONMENTAL PROTECTION IND DEV RES INST CO LTD +1
Solid-liquid separation device for silicon nitride grinding wastewater
The utility model relates to a solid-liquid separation device for silicon nitride grinding wastewater, which is characterized in that a solid-liquid separation tank is divided into two grids, namely a wastewater tank and a clean water tank; the silicon nitride powder collector is arranged at the tail end of the wastewater pool in the solid-liquid separation pool, and the wastewater pool is lined with a stainless steel bottom plate and slopes towards the silicon nitride powder collector according to the gradient of 10%; the top of a gas outlet of the gas stirrer is flush with the stainless steel tank bottom of the wastewater tank; the air compressor is connected with an air inlet of the gas stirrer through a pipeline; the clear water recycling pump is arranged at the bottom of the clear water tank in the solid-liquid separation tank; the silicon nitride powder recovery pump is arranged at the bottom of the silicon nitride powder collector and is connected with the automatic filter press through a pipeline; the automatic filter press is arranged on the ground close to the silicon nitride powder collector and is connected with the silicon nitride powder recovery pump through a pipeline; and the PLC control cabinet is connected with the air compressor, the clear water recycling pump, the silicon nitride powder recycling pump and the automatic filter press through a wireless network.
Owner:CHINA CEC ENG