Poly Aluminum Chloride for Slaughterhouse Wastewater Treatment

Poly Aluminum Chloride (PAC) Product Introduction: High-Efficiency Coagulant for Slaughterhouse Wastewater Treatment

Product Overview

This product is a specially optimized Poly Aluminum Chloride (PAC) high-efficiency coagulant formulated for the characteristics of slaughterhouse and meat processing wastewater. Slaughter wastewater is rich in fats, blood, proteins, and suspended solids, forming a stable colloidal system that is difficult to separate by conventional methods. Leveraging the exceptional capabilities of its highly charged polymeric aluminum species in charge neutralization, adsorption-bridging, and netting-sweeping, this product rapidly destabilizes colloids to form separable flocs. It serves as the core chemical agent in slaughterhouse wastewater treatment processes for achieving efficient pollutant removal and preliminary water purification.

Core Functions in Slaughterhouse Wastewater Treatment

1. Efficient Demulsification, Oil Removal, and Suspended Solids Reduction
   • Demulsification and Destabilization: The abundant emulsified oils and colloidal proteins in slaughter wastewater carry negative surface charges, creating a stable system through mutual repulsion. The highly positively charged polymeric hydroxy-aluminum ions produced upon PAC hydrolysis powerfully neutralize these negative charges, breaking the emulsified and colloidal stability, causing them to destabilize and aggregate.
   • Floc (“Alum Bloom”) Formation: The destabilized fine particles rapidly coalesce into visible “alum blooms” (flocs) under the adsorption-bridging action of PAC, creating the conditions for subsequent solid-liquid separation via sedimentation or flotation.
2. Advanced Phosphorus Removal to Prevent Eutrophication
   • Slaughter wastewater often contains phosphorus from organic matter. The aluminum ions in PAC react with phosphate ions to form insoluble aluminum phosphate precipitate, enabling efficient chemical phosphorus removal and helping effluent meet total phosphorus standards.
3. Partial COD Removal and Color Reduction
   • Removes a significant amount of insoluble organic matter and colored substances through flocculation, effectively reducing the wastewater’s Chemical Oxygen Demand (COD) and color, thereby alleviating the load on subsequent biological treatment units.

Core Product Advantages

• Targeted Formulation: Optimized for the high-fat, high-protein, high-suspended-solids characteristics of slaughter wastewater. Coagulation reaction is fast, producing dense flocs with excellent settling properties.
• Wide pH Adaptability: Maintains excellent performance across a broad pH range (particularly under neutral to slightly alkaline conditions after adjustment with NaOH), offering great operational flexibility.
• Cost-Effective Treatment: High active content allows for relatively lower dosage compared to traditional aluminum salts, and generates relatively less sludge, resulting in more favorable overall treatment costs.
• Good Safety Profile: The product is free from undesirable impurities like heavy metals (high-quality grade), and its hydrolysis process has a relatively mild impact on water pH.

Technical Parameters & Specifications

• Appearance: Pale yellow or golden-yellow powder/granules
• Aluminum Oxide (Al₂O₃) Content: ≥ 28% – 30% (High-grade)
• Basicity: 70% – 85% (Adjustable for different water qualities)
• Water Insolubles: ≤ 0.6%
• pH (1% aqueous solution): 3.5 – 5.0

Recommended Process Location & Dosing Method

• Dosing Point: Typically located after screening and equalization tanks, at the beginning of the rapid mix section in the flocculation reaction tank. Wastewater should first be adjusted to the optimal reaction pH range of 7.5-8.5 using NaOH flakes.
• Dosing Method: Recommended to be prepared as a 5%-10% solution and dosed continuously via a metering pump. Rapid and thorough mixing with the wastewater is essential for optimal performance.
• Synergistic Process: Subsequent dosing of Polyacrylamide (PAM) as a flocculation aid is required to further enlarge and agglomerate the micro-flocs formed by PAC, enabling rapid and complete solid-liquid separation.

Safety, Storage & Usage Precautions

1. Safe Handling: The solid product is slightly hygroscopic. When preparing solutions, wear gloves and safety goggles to avoid dust inhalation or prolonged direct contact with eyes and skin.
2. Solution Preparation: Use clean water. Add solid PAC slowly under stirring to prevent clumping. Prepare solutions for immediate use, as the coagulation efficacy of stored solutions gradually decreases over time.
3. Storage Conditions: Store in a sealed container in a cool, dry, and well-ventilated place. Protect from rain and moisture.
4. Dosage Determination: Optimal dosage varies with water quality fluctuations. It is recommended to determine the most economical and effective dosage range through jar coagulation tests.

As a key component of the “Coagulation-Flocculation” unit in slaughterhouse wastewater treatment, this PAC product, together with NaOH and PAM, forms an efficient and stable chemical treatment system. We can provide complimentary on-site water quality testing and chemical selection/compatibility services to develop an optimized dosing process Solution for your wastewater treatment system, ensuring stable operation and compliant discharge.