Coating general knowledge: the maximum allowable concentration of harmful substances in coating industrial wastewater

Core tip: the maximum allowable concentration of harmful substances in industrial wastewater can be divided into two categories: the first category is the maximum allowable concentration of industrial wastewater, which refers to the accumulation of harmful substances in the environment and animals, which has a long-term impact on human body This kind of waste water is strictly required and cannot be diluted to replace the necessary treatment The concentration at the outlet of the workshop shall meet the emission standard in Table 1 Table I maximum discharge concentration of class I industrial waste water containing name of harmful substance maximum allowable discharge concentration / (mg / L) mercury and its inorganic compound 0.05 (calculated by Hg) cadmium and its inorganic compound 0.10 (according to Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Paint House News: the maximum allowable concentration of hazardous substances in industrial wastewater can be divided into two categories: the first category is the maximum allowable concentration of industrial wastewater, which means that hazardous substances in wastewater can accumulate in the environment and animals, and have a long-term impact on human body This kind of waste water is strictly required and cannot be diluted to replace the necessary treatment The concentration at the outlet of the workshop shall meet the emission standard in Table 1 Table I maximum discharge concentration of class I industrial waste water maximum allowable discharge concentration / (mg / L) mercury and its inorganic compound 0.05 (calculated by Hg) cadmium and its inorganic compound 0.10 (calculated by CD) hexavalent chromium compound 0.50 (calculated by CD6 + aluminum and its compound 1.0 (calculated by Pb) arsenic and its compound 1.50 (calculated by as) nickel and its compound 1.0 (calculated by Ni) The maximum allowable concentration of class II industrial wastewater means that the long-term impact of harmful substances contained in this kind of wastewater on human health is less than that of class I, and the maximum allowable discharge concentration is shown in Table II Table 2 maximum discharge concentration of class II industrial wastewater The name of the wastewater containing harmful substances The maximum allowable discharge concentration / (mg / L) pH value is 6 ~ 9 Suspended solids 250 BOD 80 cod 200 Petroleum 20 Zinc and its compounds 5.0 (calculated by Zn) Inorganic compounds 10 (calculated by F) Aniline 3.0 Cyanide (calculated by free cyanogen) 0.5 Sulfide 2.0 The family of coatings focuses on coating, diatom mud and paint News and information of coatings, coating technology, fire retardant coatings, diatom mud, paint coatings, coating technology, decoration knowledge and decoration effect map of fire retardant coatings,