Towel Dyeing Plant Nature of Wastewater Polyaluminum Chloride Method Towel Dyeing Plant Wastewater Properties Polyaluminum Chloride Method Towel Dyeing Wastewater is mainly derived from pretreatment, dyeing, printing and finishing processes. The maximum discharge of wastewater is 920m3 / d and the design water volume is 1000m3 / d. After treatment, the effluent quality is implemented in the first grade of GB4287-92, which is the standard for the discharge of water pollutants from the textile dyeing and finishing industry. The wastewater discharged from the wastewater from the towel factory contains a large amount of Residual dyes, slurries, additives, lint. Nitrogenous compounds, etc., with high concentration of organic matter, deep color, strong alkaline, nitrogen-containing high characteristics. Because 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. 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. The use of "Chin Yin" brand polyaluminium 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. Use should pay attention to: PAC 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 of raw water concentration of 100 ~ 500mg / Dosage for 3 ~ 6mg / I. Specific dosing, water quality should be based on water test, select the best dosage and then put into use. This information by the filter water purification office from http://www.gyzhenyu.com finishing release, more water purification material products, please visit http://www.gyzhenyu.com/chanpin/