Experimental results of filter polluting wastewater from dairy farms by filter polyaluminum chloride Analysis of experimental results of removing aluminum polluted water from polluted dairy farms by filter polyaluminum chloride The concentration of organic compounds, ammonia nitrogen and fecal coliforms in aquaculture wastewater is high and its biodegradability is poor. Aiming at the characteristics of aquaculture wastewater, the treatment of two-phase anaerobic, aerobic, coagulation and disinfection in the design can achieve good treatment effect. This article only removes the dairy wastewater from the coagulation process of polyaluminum chloride The effect for everyone to analyze. The processing of other processes is also very important, here no longer commentary. Coagulation sedimentation tank is mainly used to remove the water color, suspended solids and reduce COD. Because SBR drainage is intermittent, so the coagulation sedimentation tank set in one, the design effective volume of 40 cubic meters set full of water after a one-time investment polyaluminium chloride coagulation reaction 20min precipitation 1h drainage sediment 1d row 1 times. Filter polyaluminum chloride removal of dairy wastewater CODcr effect In 300ml of wastewater, adding different amounts of coagulant, mixing, to be clarified after the determination of supernatant CODcr. It can be seen that using 0.1% coagulant polyaluminum chloride can reduce CODcr of waste water from 2013mg / L to 691mg / L with a removal rate of 65.7%. With the increase of the amount of coagulant PAC, the treated wastewater concentration is getting lower and lower, the coagulation effect is getting better and better. When the adding amount is 0.2%, the CODcr of the treated wastewater can be reduced to 563mg / L, removal rate of 72.0%. Effect of filter-polyaluminum chloride on removal of NH3-N from dairy wastewater Wastewater with different amount of coagulant was added to 300ml of wastewater, stirred and mixed until supernatant NH3-N was clarified. It can be seen that using 0.1% coagulant can reduce the NH3-N of the treated wastewater from 75.1mg / L to 32.9mg / L, and the removal rate reaches 56.2%. With the increase of coagulant dosage, The concentration of wastewater is getting lower and lower, the coagulation effect is getting better and better. When the adding amount is 0.2%, the treated wastewater can reduce the NH3-N to 24.6mg / L and the removal rate to 67.2%, which can reach the national level Emission Standards. Study on the Removal of Chroma of Dairy Farm Wastewater with Polyaluminum Chloride as Filter Source In 300ml of waste water, different amount of coagulant was added, stirred and mixed until the color of supernatant was clarified. It can be seen that the use of 0.1% coagulant polyaluminum chloride can make the color of treated wastewater change from dark gray to light yellow, the color degree is reduced from 180 degrees to 70 degrees and the removal rate reaches 61.1%; with the coagulation The dosage increases, the color of the treated wastewater is getting lower and lower, and the coagulation effect is getting better and better. When the adding amount is 0.2%, the color of the treated waste water can be changed to a light yellow color, the chroma can be reduced to 40 degrees and the removal rate can reach 77.8%, which can reach the national first-class discharge standard. The impact of wastewater treatment of heavy metal elements on the treatment of dairy wastewater by polyaluminum chloride treatment Using coagulant polyaluminium chloride to treat dairy wastewater, will it not exceed the standard of heavy metal elements in treated effluent? Here, we can make use of coagulation Agent polyaluminum chloride treatment of heavy metals in oil wastewater data to illustrate, the amount of coagulant 0.2%, and the dairy farm wastewater coagulation treatment of the maximum amount equivalent. The results showed that: (1) CODcr was reduced from 2010mg / L to 563mg / L ~ 691mg / L, and NH3-N decreased from 75mg / L to 25mg / L ~ 33mg / L after dairy wastewater was treated with coagulant polyaluminum chloride , CM from 180 degrees to 40 degrees to 70 degrees; ② coagulation - surface aeration process, the dairy wastewater treatment can meet the national emission standards, and the treatment process is simple, low investment, low operating costs, easy operation and management .