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Waste treatment process for removal of contaminants from aqueous, mixed- waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering
Waste treatment process for removal of contaminants from aqueous, mixed- waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering
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机译:废物处理工艺,采用顺序化学处理和错流微滤技术,从混合废水中去除污染物,然后进行脱水
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摘要
In processes of this invention aqueous waste solutions containing a variety of mixed waste contaminants are treated to remove the contaminants by a sequential addition of chemicals and adsorption/ion exchange powdered materials to remove the contaminants including lead, cadmium, uranium, cesium-137, strontium-85/90, trichloroethylene and benzene, and impurities including iron and calcium. Staged conditioning of the waste solution produces a polydisperse system of size enlarged complexes of the contaminants in three distinct configurations: water- soluble metal complexes, insoluble metal precipitation complexes, and contaminant-bearing particles of ion exchange and adsorbent materials. The volume of the waste is reduced by separation of the polydisperse system by cross-flow microfiltration, followed by low-temperature evaporation and/or filter pressing. The water produced as filtrate is discharged if it meets a specified target water quality, or else the filtrate is recycled until the target is achieved.
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