Towel factory printing and dyeing wastewater treatment using aluminum chloride effect how? Towel factory printing and dyeing wastewater treatment using aluminum chloride effect how? Wastewater from the wastewater treatment plant contains a lot of residual dye, slurry, auxiliaries, lint, nitrogen compounds, etc. It has the characteristics of high concentration of organic compounds, deep color, strong alkalescence and high nitrogen content. At this time, with the better effect of PAC, PAC as water purification materials, adaptability to a variety of water quality, particularly for high-turbidity water flocculation sedimentation effect is obvious, the application of PH value in the range of 3.5-5.0 . For low-temperature water treatment is better, flocculation of alum to form blocks, dense and heavy particles, easy to settle, can shorten the settling time, low turbidity, low color, good filtration. Use of filter polyaluminum chloride can shorten the filtration cycle. Containing high alumina, dosage less, can reduce the cost of water. Corrosive, conducive to pipeline protection, easy to use, easy to store, transport, in case of deliquescence, its effect remains unchanged. Wastewater quality and water treatment standards: The towel factory printing and dyeing wastewater mainly comes from pretreatment, dyeing, printing and finishing processes. The maximum discharge of wastewater is 920m3 / d and the design water volume is 1000m3 / d. After the treatment, the effluent quality will be implemented as Class I standard GB4287-92 of "Emission Standard of Water Pollutants for Textile Dyeing and Finishing Industry". Poly aluminum chloride is an inorganic polymer coagulant. Mainly through compression double layer, the absorption of electricity neutralization, adsorption bridging, sediment net arrest mechanism such as the role of fine suspended particulates and colloidal ions in water destabilization, aggregation, flocculation, coagulation, precipitation, to achieve purification effect. Polyaluminum chloride Usage: The product (solid) and water at room temperature by 1/3 weight ratio while stirring dosing until completely dissolved, and then diluted with water to the desired concentration, raw water concentration of 100 ~ 500mg / time investment Add the amount of 3 ~ 6mg / I. Specific dosing, water quality should be based on water test, select the best dosage and then put into use. (Filter plant proposal, the use of PAC, before making a small test, and then determine the appropriate model)