Food-processing plant wastewater contains large amounts of organic matter, and cationic polyacrylamide flocculants generally yield better results when treating this type of wastewater. If the site employs secondary biochemical treatment, anionic polyacrylamide (PAM) should be used; during the sludge dewatering stage, cationic flocculants are required. When selecting polyacrylamide flocculants (PAM) for food-processing plants, it is essential to consider both the molecular weight and ionic degree of the PAM, and then determine the optimal model through experimentation. When using polyacrylamide flocculants (PAM) to treat wastewater from food-processing plants, factors such as the nature of the sludge source, the size of the flocs, the ionic degree of the PAM, and the strength of the flocs must be taken into account. Understanding the source, properties, composition, and solid content of the food-processing plant wastewater can help preliminarily identify the appropriate ionic type of PAM flocculant to use. Based on the requirements of the on-site treatment process, one should determine whether larger or smaller flocs are preferable, since flocs that are too small may slow down the drainage rate, while flocs that are too large may trap excessive water, reducing the dryness of the sludge cake. By choosing polyacrylamide flocculants with different molecular weights, the size of the flocs can be adjusted accordingly. Furthermore, depending on the filter press used for sludge dewatering at the food-processing plant, PAM flocculants with different ionic degrees should be selected. It is necessary to conduct laboratory selection tests to identify the PAM model that produces flocs that are tightly bound, stable, and resistant to breakage.

In summary, when treating wastewater from food processing plants, it is essential to conduct rigorous beaker tests to select the optimal polyacrylamide flocculant model, ensuring both superior solid-liquid separation performance and excellent sludge dewatering results. Regarding the treatment of food-processing plant wastewater, Suzhou Haonuo has accumulated extensive experience in the selection and application of polyacrylamide flocculants. Based on the specific requirements of each food-processing plant, we can recommend flocculant products that are well-matched to the particular on-site processes and equipment. We are committed to helping food-processing plants choose the most suitable and cost-effective polyacrylamide flocculants and to identifying the best solutions tailored to their respective wastewater treatment facilities.