CPC has filed a patent for a method to treat waste liquid by removing sulfide and organic pollutants without generating H2S. The process involves using precursory and advanced oxidants, UV illumination, and aeration. The method aims to convert and degrade sulfide and remove organic pollutants effectively. GlobalData’s report on CPC gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on CPC, Multiphase lithium composite batteries was a key innovation area identified from patents. CPC's grant share as of January 2024 was 66%. Grant share is based on the ratio of number of grants to total number of patents.
Method for treating waste liquid with high sulfide concentration
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A patent application (Publication Number: US20230406744A1) discloses a method for simultaneously treating a high concentration of sulfide and organic composition in a waste liquid. The method involves several steps, including sulfur removal by precursory stabilizing conversion using hydrogen peroxide or sodium percarbonate, sulfur removal by advanced oxidative degradation using sodium persulfate or potassium persulfate, and UV illumination to activate the oxidant dissolved in the waste liquid. Additionally, the method includes a post-treatment step where the waste liquid can be recycled as regenerative lye or adjusted for biological treatment or direct discharge.
Furthermore, the patent application specifies the types of sulfides present in the waste liquid, such as organic sulfides and inorganic sulfides, and provides details on the concentration ranges of sulfide and COD in the waste liquid. The method also outlines the specific conditions for treatment times, UV light wavelength range, and the types of waste liquids suitable for this treatment process, including petrochemical industry waste lye, pharmaceutical wastewater, tanning wastewater, aquaculture wastewater, domestic sewage, or soil groundwater. Overall, the method offers a comprehensive approach to efficiently treating waste liquids with high concentrations of sulfide and organic compounds, potentially benefiting various industries dealing with such wastewater challenges.
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