:( Customer information provided by the customer) Main business: zinc / sulfuric acid production watery Source: sulfuric acid plant / zinc smelting plant capacity: 1000 tons / day of raw Process: sodium hydroxide precipitation levels + level filtration average PH: 1-3 Heavy Metal: Heavy Metal zinc, cadmium, copper, arsenic and other initial concentration: 600mg / L effluent standard: lead and zinc industry emission standards (Table II) Weak Promise _ watery Information: Weak Promise _ the original process Analysis: Weak Promise _ process design ideas: 1, the general idea: to reduce drug costs, reduce processing steps, reduce sludge volume 2, the first two levels of the original sedimentation process the same, but adjusted to between 8-9 meter PH 3, After precipitation levels, plus a small amount of water to remove residual agent RS100 recapture heavy metal 4, the third stage precipitation, the water in PH PH between 6-8, can be directly discharged Promise _ Weak water quality (Unit: mg / L ) a precipitation water two precipitation water precipitation water three national standards Zn 0.12 1.85 0.05 1.5 Cu 0.15 0.09 0.05 0.5 Cd 0.03 Not detected Not detected 0.05 Pd 0.4 0.6 0.03 0.5 Hg 0.12 0.05 0.01 0.03 As 3 0.1 0.1 0.3 weak Pharmacy and sludge water Promise _ :( average dosing tons of wastewater and zinc waste to produce 1: 1 subject) Pharmacy Name Price RS100 original new process technology Ca (OH) 2 0.4 元 / kg 20kg / t 30kg / t RS100 35 元 20g / t PAC 0.35 元 / kg 100g / t unknown PAM 30 元 / kg 5g / t unknown tons of Pharmacy of the nine yuan Cheng> 12 yuan sludge production 100kg / ton water 150kg / ton water Promise _ Weak guidance Programme: 1, raw water opportunity precipitation, use of Ca (OH) 2 to adjust the PH to 92, water was added 20mg / LRS100, the reaction was stirred for 10min 3, was added 100mg / L PAC, mix 4 with rapid stirring, was added 5mg / L PAM, slow After stirring for 30min Weak precipitation mixing process Promise _ Comparison: original new process technology RS100 dose> 30kg / t 20kg / t Pharmacy costs> 9 yuan 12 yuan a large amount of sludge (150kg / t) 1/3 reduction process three sedimentation filtration process three precipitate Ph + two if a large number of acid callback callback callback without basic water quality standards stability and compliance 

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