In addition to copper and nickel _ an electronics factory in Kunshan board sewage treatment Promise _ Weak Case Customer Information: Main business: PCB manufacturing watery Source: general cleaning water capacity: 250 tons / day of raw Process: Ca (OH) 2 + NaOH = Na2S / recapture agents average ph: 1.65 mainly heavy metals: nickel, copper main initial concentration of heavy metals: copper> 300ppm, nickel <4ppm effluent standard: copper <0.3ppm, nickel <0.1ppm Weak Promise _ watery information: Appearance light green indicator data, transparency is not high nickel content 3.5ppm PH 1.65 308ppm copper content Promise _ shui design ideas: 1, the raw water is about 1.65 PH, Xu adjust PH to 9-10 to remove large amounts of ionized copper and nickel 2. After precipitation of the supernatant to adjust PH, add RS100, is expected to join 100-200ppmRS100 Promise _ Weak standards of experimental data: pharmaceutical dosage (mg / L) of nickel effluent concentration (mg / L) of water copper concentrations (mg / L) RS100 PAC PAM first group of 501 003 0.133 0.824 0.064 second group 1,001,005 20,020,010 0.036 0.038 The third group was not detected shui _ Promise mentoring program: 1, the raw water adding NaOH to adjust PH 9-10 can add PAC, PAM coagulation sedimentation 2, go above precipitation water (supernatant) was added 100ppmRS100, the reaction was stirred 10min 3, join 100ppmPAC, quick stir and mix 4, adding 5ppmPAM, stirring mix precipitation 30min 5, namely water discharge standards (nickel <0.1ppm, Cu <0.3ppm) Note: The program targets based on water samples provided by the customer, if the actual copper-nickel content increased, should increase the amount of Weak RS100 Promise _ Cost Analysis: Pharmacy price (yuan / kg) the amount (kg / t) Cost (yuan / ton) RS100 35 0.1 3.5 PAC 3 0.1 0.3 PAM 20 0.005 0.1 3.9 tons of the drug away 

keywords: Recapture agents, phosphorus, flocculants, broken cyanide agents,