Polyacrylamide Flocculant Water Treatment

Polyacrylamide Flocculant for Water Treatment: Product Guide & Application Cases

Product Overview of Polyacrylamide Flocculant for Water Treatment

Polyacrylamide flocculant is a highly efficient water-soluble polymer specifically developed for water treatment applications.

Synthesized through the polymerization of acrylamide monomers, this flocculant presents as a white or off-white solid in granular or powdered form, characterized by its non-toxic, odorless nature and excellent water solubility.

Product Performance: The core advantage of polyacrylamide flocculants in the field of water treatment lies in their powerful capabilities regarding adsorption, bridging, and charge neutralization. They can rapidly aggregate minute suspended particles, colloids, and organic impurities present in water into larger, denser flocs, thereby achieving efficient solid-liquid separation and significantly improving water quality.

Product Classification: Based on the electrical charge characteristics of their molecular chains, polyacrylamide flocculants used in water treatment are primarily categorized into three main types: Anionic Polyacrylamide, Cationic Polyacrylamide, and Non-ionic Polyacrylamide. Each product category is optimized for specific water treatment scenarios and water quality profiles, aiming to meet the increasingly diverse application requirements of municipal, industrial, and various specialized water treatment projects.

Technical Indicators of Polyacrylamide Flocculant for Water Treatment

The technical indicators of polyacrylamide flocculant directly determine its flocculation efficiency, applicability, and treatment effect in water treatment projects. Different types of polyacrylamide flocculant have targeted indicators to adapt to different water quality and treatment processes. The following are the optimized technical parameters for water treatment-specific polyacrylamide flocculant:

Note: We provide customized polyacrylamide flocculant products according to the specific water quality (turbidity, pH, impurity type), treatment process (sedimentation, flotation, sludge dewatering), and emission standards of water treatment projects. The technical indicators can be flexibly adjusted to ensure optimal treatment effect and cost control, complying with international water treatment quality standards including ISO 9001:2015.

Core Application of Polyacrylamide Flocculant in Water Treatment Field

Polyacrylamide flocculants serve as core functional chemicals within the water treatment industry, finding widespread application in areas such as municipal water supply, municipal wastewater treatment, industrial effluent treatment, and the purification of specialized water bodies (e.g., drinking water treatment and groundwater remediation). Their application significantly enhances treatment efficiency, reduces sludge generation, and assists enterprises and projects in meeting various environmental discharge standards.
Through the examination of specific case studies, Henan Saifu Company will provide a detailed overview of the application of these flocculants across diverse water treatment sectors, thereby demonstrating their practical value in real-world water treatment scenarios utilizing polyacrylamide flocculation.

• Municipal Water Supply Treatment

Municipal water supply systems require strict control over turbidity, suspended solids, and organic impurities to ensure the safety of drinking water. Polyacrylamide flocculants are primarily utilized in the coagulation-sedimentation and filtration stages of water treatment processes. By working synergistically with primary coagulants (such as polyaluminum chloride), they significantly enhance flocculation efficiency, reduce the required dosage of primary coagulants, and ensure that the quality of the treated water meets national drinking water standards. This flocculant effectively removes fine suspended particles, algae, and colloidal substances from raw water, thereby improving water clarity and reducing the operational load on subsequent filtration stages.

Application Case: A Municipal Water Treatment Plant in East China - This facility sources its raw water from surface water (reservoir water), characterized notably by extremely high seasonal turbidity (peaking at 500 NTU during the rainy season) and elevated algae levels. Prior to utilizing the polyacrylamide flocculants manufactured by our company, the plant faced numerous severe challenges, including suboptimal flocculation performance, inefficient sedimentation, and drastic fluctuations in effluent water quality. Acting upon the recommendations of technical experts from Henan Saifu, the plant switched to using non-ionic polyacrylamide flocculant. An optimal dosage range of 1.2 to 2.0 ppm was established for use in conjunction with polyaluminum chloride (PAC). Following the implementation of this treatment process, laboratory analyses confirmed that effluent turbidity plummeted from an initial 500 NTU to below 0.5 NTU, while the algae removal rate exceeded 98%. Concurrently, sedimentation time was reduced by 30%, resulting in a 15% reduction in the plant's operational costs.

• Municipal Sewage Treatment

Municipal sewage contains a large amount of domestic garbage, organic matter, suspended solids, and ammonia nitrogen. The core demand of its treatment is to remove organic pollutants and suspended solids, and dewater sludge to reduce sludge volume. Polyacrylamide flocculant plays a key role in the flocculation sedimentation and sludge dewatering stages of municipal sewage treatment: CPAM is mainly used for sludge dewatering, which can effectively separate water from sludge, reduce sludge moisture content, and facilitate sludge transportation and disposal; APAM is used for primary and secondary sedimentation tanks to aggregate suspended solids and organic colloids into flocs, improving sedimentation efficiency.

Application Case: A Municipal Wastewater Treatment Plant in Northern China - This facility possesses a daily treatment capacity of 100,000 tons and primarily processes urban domestic sewage. Prior to the upgrade, the main challenges included high sludge moisture content (exceeding 85%), difficulties in dewatering, and a large volume of sludge requiring disposal-factors that resulted in persistently high operating costs. Following the adoption of our company's cationic polyacrylamide flocculant-characterized by a cationic degree of 40%–50%-the dosage applied during the sludge dewatering stage was maintained within the range of 3.0 to 4.5 ppm. The treatment results demonstrated a reduction in sludge moisture content to 70%–75%, a 40% decrease in sludge volume, and a 25% improvement in the dewatering efficiency of the belt filter presses; these improvements translate into annual savings of over 800,000 RMB in sludge disposal costs.

• Industrial Wastewater Treatment

Industrial wastewater has the characteristics of complex composition, high pollutant concentration, strong toxicity, and difficult treatment (such as steel, electroplating, textile, chemical, food processing wastewater). Different types of industrial wastewater require targeted selection of polyacrylamide flocculant: APAM is suitable for treating industrial wastewater with high turbidity, high suspended solids, and neutral to alkaline pH (such as steel smelting wastewater, coal washing wastewater); CPAM is suitable for treating wastewater with high organic content and sludge dewatering (such as textile printing and dyeing wastewater, food processing wastewater); NPAM is suitable for treating acidic industrial wastewater (such as electroplating wastewater, chemical wastewater).

Application Case: Textile and Dyeing Wastewater Treatment in South China - A textile and dyeing plant generates 5,000 tons of wastewater daily. This wastewater is characterized by high color intensity, a Chemical Oxygen Demand (COD) reaching up to 1,200 mg/L, high Biochemical Oxygen Demand (BOD), and a high concentration of suspended solids, making it extremely difficult to treat via biological degradation alone. Previously, the plant utilized traditional flocculants for treatment; however, both its decolorization rate (approximately 60%) and COD removal rate (below 70%) remained at low levels, preventing the facility from meeting wastewater discharge standards. Following the implementation of our customized CPAM flocculant-combined with advanced oxidation technology-the dosage of the flocculant was successfully controlled within the range of 4.0–5.5 ppm. As a result of this treatment process, the wastewater's decolorization rate exceeded 95%, the COD removal rate reached 88%, and turbidity dropped to below 10 NTU. Ultimately, all key parameters fully met the required discharge standards.

• Specialized Water Treatment

Specialized water treatment encompasses fields such as groundwater remediation, landfill leachate treatment, and circulating water treatment. These application scenarios often involve rigorous water quality conditions and exceptionally high treatment requirements, thereby necessitating the use of customized polyacrylamide flocculant products.
For instance, landfill leachate is typically characterized by high concentrations of organic matter, elevated levels of ammonia nitrogen, and a complex chemical composition; to address such conditions, cationic polyacrylamide with a high degree of cationicity is frequently selected to significantly enhance flocculation efficacy and sludge dewatering efficiency. Conversely, in the realm of groundwater remediation, the primary targets for treatment are suspended solids and heavy metal ions; in these instances, either anionic polyacrylamide or non-ionic polyacrylamide  is selected-based on the water's pH level and the specific types of impurities present-to ensure the successful outcome of the remediation efforts.
Across all the aforementioned application scenarios, polyacrylamide flocculants play a pivotal role; they not only effectively accelerate the solid-liquid separation process but also boost water recovery and recycling rates, thereby reducing the consumption of freshwater resources within industrial production processes.

Packaging, Storage and Usage Notes for Water Treatment Scenarios

• Packaging

The polyacrylamide flocculant used for water treatment is packaged in kraft paper bags lined with plastic film; each bag has a net weight of 25 kilograms and features excellent moisture-proof and anti-caking properties. Furthermore, we offer customized packaging services to fully accommodate the bulk purchasing requirements of large-scale water treatment projects. All packaging strictly complies with relevant regulations regarding the transportation and storage of chemical products, thereby ensuring the integrity and quality of the product throughout the entire transit process.

• Storage

Polyacrylamide flocculants intended for water treatment should be stored in a dry, cool, and well-ventilated warehouse, protected from moisture, rain, and direct sunlight. The storage temperature should be maintained between 5°C and 30°C. The product must be kept away from oxidizing agents, acids, and alkalis to prevent chemical reactions that could compromise its performance. The shelf life for powdered polyacrylamide flocculants is 24 months, while that for emulsion-based flocculants is 6 to 12 months. If the product becomes damp or forms lumps, it must be dried and crushed before use; however, if the product has severely deteriorated, it should not be used further, as this would negatively impact the effectiveness of the water treatment process. Under dry storage conditions, the product can maintain stable performance for up to 3 years.

Instructions for Use (For Water Treatment Applications)
1. Solution Preparation: Dissolve the polyacrylamide flocculant in clean water (preferably tap water or treated water) to prepare a solution with a concentration of 0.1% to 0.3%. The stirring speed should be controlled between 100 and 300 rpm to prevent molecular chain scission caused by excessive agitation, which would compromise the flocculation efficiency. Allow for sufficient dissolution time-typically 30 to 90 minutes-until the solution becomes completely clear and transparent, free of any undissolved particles. The optimal dissolution temperature is 10°C to 40°C, as this facilitates the full hydration of the polymer molecular chains.
2. Dosage Control: The dosage rate should be determined based on actual water quality conditions (including turbidity, pH value, and the type of impurities present) and the specific treatment process employed. It is recommended to conduct preliminary bench-scale tests (beaker tests) to identify the optimal dosage, thereby avoiding adverse treatment outcomes resulting from either excessive or insufficient chemical addition. The standard dosage range is typically 0.5 to 6.0 ppm, though this may be adjusted flexibly to suit actual on-site conditions.
3. Application Method: The prepared solution should be added uniformly to the water undergoing treatment and thoroughly mixed to ensure complete contact between the solution and the water, thereby achieving optimal flocculation results.
4. Safety Precautions: When handling this product, please wear gloves and a face mask to prevent direct contact between the chemical and your skin or respiratory tract. In the event of accidental contact with the eyes or accidental ingestion, immediately flush the affected area with copious amounts of clean water; seek medical attention if necessary.