The emergence of various industrial wastewater treatment methods and continuous technological innovations have significantly improved the comprehensive utilization of water resources. Industrial wastewater treatment is a crucial component of sustainable water resource management. According to surveys, rivers, lakes, and ponds worldwide suffer from varying degrees of pollution, with industrial wastewater pollution being a major concern. Water is essential for human needs, industrial processes, urban and rural areas. As a valuable and closely related resource, effective treatment is paramount. So, how do we address this issue? Here, TAIRAN CHEMICAL provides insights from three perspectives:
Polyaluminum Chloride Coagulation in Refinery Wastewater Treatment: In refinery wastewater treatment, the addition of polyaluminum chloride coagulant significantly removes COD (Chemical Oxygen Demand) and oil, achieving removal rates of 92.5% and 78.1% respectively.
Purification of Power Plant Water using Polyaluminum Chloride: For power plant water purification, polyaluminum chloride is effective due to its high active ingredient content. The required dosage is only 1/2 to 1/3 of that of traditional aluminum sulfate, and it results in a slight pH drop in the effluent, reducing corrosion in clean water pipelines. This solution is economically beneficial and complies with drinking water standards.
Polialuminum Chloride Flocculation for Dyeing and Printing Wastewater Treatment: The use of high molecular weight colorless polyaluminum chloride in dyeing and printing wastewater treatment yields excellent results. Compared to similar products, colorless polyaluminum chloride exhibits higher electrical neutrality and adsorption bridging ability, leading to better cohesion and turbidity reduction. The low dosage required also provides a 10% improvement in wastewater treatment effectiveness.
The production processes of polyaluminum chloride coagulants can be categorized into three types: drum type, plate type, and spray drying type. Spray-dried polyaluminum chloride has high aluminum content and low water-insoluble substances, resulting in rapid dissolution. It's mainly used for drinking water and higher standard water treatment. Plate and frame polyaluminum chloride coagulants are also rich in aluminum and have low water-insoluble substances, making them suitable for sewage and drinking water treatment. Polyaluminum chloride with standard aluminum content and high water-insoluble substances is mainly used for sewage treatment. Classification can be done based on production processes, scope of use, and content.
The coagulation effects and speed of polyaluminum chloride vary under different conditions. How can we optimize its usage?
Direct Filtration Process: As a relatively traditional treatment method, direct filtration simplifies water treatment processes and is cost-effective.
To achieve optimal results in direct filtration, it is crucial to add the coagulant polyaluminum chloride appropriately before filtration. This enhances the surface properties of the flocs. Compared to conventional methods, the dosage of coagulant can be reduced by 40%.
When using polyaluminum chloride as a coagulant, factors affecting effluent turbidity include coagulant dosage, filtration rate, coagulant dosage, and influent turbidity. The impact on the total head loss index is as follows: coagulant dosage, coagulant dosage, influent turbidity, and filtration rate. The flocculation effect of polyaluminum chloride is also remarkable. Opting for a quality product requires a well-designed process that can achieve twice the effect with half the effort in wastewater treatment.
In conclusion, with the advent of advanced wastewater treatment techniques and ongoing technological improvements, the efficient management of industrial wastewater has become integral to ensuring water resource sustainability.
