Jiangsu Hengfeng Fine Chemical Co., Ltd.

Testing the effectiveness of polyacrylamide emulsion on treating grain oil production wastewater involves several steps, from sample collection to analysis. Here is a general procedure you can follow: Materials Needed Grain oil wastewater sample Polyacrylamide powder (prepared as per the previous guideline) Beakers or containers Magnetic stirrer pH meter Lime water Flocculation testing apparatus (e.g., jar test apparatus) Filtration apparatus Chemical dosing equipment Spectrophotometer (for further analysis of contaminants if needed) Testing Procedure 1. Sample Collection: Collect samples of grain oil production wastewater in clean containers. Ensure that the samples are representative of the wastewater being treated. 2. Initial Characterization: Adjust pH: Use a Lime water to adjust the initial pH of the wastewater. Visual Assessment: Examine the color and clarity of the wastewater. Note any visible contaminants. 3. Preparation of Polyacrylamide powder: Ensure that you have a prepared solution of polyacrylamide, as discussed in the previous procedure. This can be used for the flocculation process. 4. Flocculation Test (Jar Test): Setup: Prepare a series of beakers for different doses of polyacrylamide(e.g., 0, 5, 10, 15, 20 mg/L). Add Wastewater: Add equal volumes of the wastewater sample to each beaker (e.g., 500 mL). Add Polyacrylamide: Add the specified amount of polyacrylamide emulsion to corresponding beakers. Mixing: Stir the solutions at a rapid speed (e.g., 200 rpm) for about 1-2 minutes, then slow down to a lower speed (e.g., 30 rpm) for an additional 5 minutes to allow floc formation.     5. Settling Time: Stop stirring and allow the flocs to settle for a predetermined time. 6. Post-Treatment Analysis: Visual Assessment: Observe and note the clarity and color of the treated water. pH Measurement: Measure the final pH of the treated samples. Filtration: Filter the supernatant from each beaker to evaluate the effectiveness of the flocculating agent further. 7. Additional Testing (if needed): Use additional tests such as COD (Chemical Oxygen Demand), BOD (Biochemical Oxygen Demand), or specific contaminant analysis (e.g., heavy metals, dyes) using a spectrophotometer to assess the effectiveness of the treatment further and compare results with the initial values. Safety Precautions Wear appropriate PPE (gloves, goggles, lab coat) while handling wastewater samples and chemical agents. Handle all chemicals and equipment according to safety guidelines. Conclusion This procedure provides a systematic approach to assessing the effectiveness of polyacrylamide on treating grain oil production wastewater. It's important to optimize the concentration of polyacrylamide based on the characteristics of the specific wastewater being treated for best results.

.gtr-container-c7d8e9f0 { font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif; color: #333; line-height: 1.6; padding: 15px; max-width: 100%; box-sizing: border-box; border: none !important; outline: none !important; } .gtr-container-c7d8e9f0 p { font-size: 14px; margin-bottom: 1em; text-align: left !important; word-break: normal; overflow-wrap: normal; } .gtr-container-c7d8e9f0 .gtr-title { font-size: 18px; font-weight: bold; margin-bottom: 1.2em; color: #0056b3; text-align: left; } .gtr-container-c7d8e9f0 .gtr-section-title { font-size: 16px; font-weight: bold; margin-top: 1.5em; margin-bottom: 0.8em; color: #007bff; text-align: left; } .gtr-container-c7d8e9f0 ul { list-style: none !important; padding-left: 20px !important; margin: 0 !important; } .gtr-container-c7d8e9f0 ul li { position: relative !important; padding-left: 15px !important; margin-bottom: 8px !important; line-height: 1.6 !important; font-size: 14px !important; text-align: left !important; list-style: none !important; } .gtr-container-c7d8e9f0 ul li::before { content: "•" !important; position: absolute !important; left: 0 !important; color: #007bff !important; font-size: 16px !important; line-height: 1.6 !important; } @media (min-width: 768px) { .gtr-container-c7d8e9f0 { padding: 25px; max-width: 960px; margin: 0 auto; } } CPAM Emulsion + Cationic Starch  (High-filler White Cardboard, Southeast Asian Paper Mill) Mill Overview A packaging paper mill equipped with a 2000mm paper machine running at a speed of 700m/min. The pulp consists of 50% hardwood pulp and 50% recycled pulp, with GCC filler dosage reaching 30%. The original CPAM + bentonite system suffered from low filler retention and insufficient paper strength. Binary System Solution Cationic starch: Dosage of 0.8% (based on oven-dry pulp), added into the mixed pulp chest to neutralize surface charges first. CPAM Emulsion: Cationic degree of 50%, molecular weight of 12 million, dosage of 0.06% (based on oven-dry pulp), added 30 seconds after starch dosing. Process Control: Cationic starch → CPAM emulsion in sequence, with pH maintained at 6.5–7.0 to match the high-ash pulp system. Application Results Filler retention increased by 18%, with the paper ash content stably controlled at 28–30%. Tensile index improved by 10% and burst index by 8%, resolving the strength reduction issue caused by high filler loading. Auxiliary agent cost per ton of paper was reduced by 1 USD, while the paper stiffness was also enhanced.

Project Background A municipal wastewater treatment plant in Brazil was facing challenges in sludge dewatering efficiency and solid–liquid separation performance. Due to increasing treatment volumes and stricter environmental discharge standards, the plant was seeking a more efficient and cost-effective flocculant solution.   Solution Provided Jiangsu Hengfeng Fine Chemical Co., Ltd. supplied a cationic polyacrylamide (CPAM) specially designed for municipal wastewater and sludge treatment. Based on the customer’s water quality characteristics, laboratory jar tests were conducted to evaluate flocculation performance and optimal dosage.   Application Process The cationic polyacrylamide was applied in the sludge conditioning stage before mechanical dewatering. During on-site testing, the product demonstrated rapid floc formation, strong floc structure, and excellent settling performance.   Results & Performance The test results showed significant improvements:   Faster sludge settling and clearer supernatant   Improved sludge dewatering efficiency   Reduced moisture content in dewatered sludge cakes   Lower chemical consumption compared to previous flocculants   The customer confirmed that our cationic polyacrylamide met their operational requirements and achieved stable, reproducible performance under real operating conditions.   Customer Feedback After successful testing, the municipal wastewater treatment plant expressed strong satisfaction with the product performance and technical support provided. The solution proved to be reliable for continuous operation and suitable for large-scale municipal wastewater treatment applications.