Effective water treatment relies on a deep understanding of chemical processes that remove impurities. At Ningbo Inno Pharmchem Co., Ltd., we harness the science of coagulation and flocculation, utilizing Poly Aluminium Chloride (PAC) as a key enabler. This article explores the scientific underpinnings of these crucial steps and highlights how PAC excels in achieving pristine water quality.

The journey to clean water typically begins with the coagulation stage. Raw water sources are often laden with microscopic particles, colloids, and dissolved organic matter that are too small to be removed by simple filtration. These particles carry a negative electrical charge, which causes them to repel each other, remaining dispersed in the water. Poly Aluminium Chloride, a highly charged inorganic polymer, plays a vital role here. When introduced into the water, the positively charged aluminum species in PAC neutralize these negative charges on the suspended particles. This charge neutralization disrupts the repulsive forces, allowing the particles to begin aggregating.

Following coagulation, the process moves into flocculation. This stage involves gentle mixing, which encourages the neutralized particles to collide and form larger, visible masses known as flocs. The polymeric structure of PAC is particularly adept at bridging these smaller aggregates together, creating larger, denser, and more robust flocs. The efficiency of flocculation is influenced by factors such as mixing intensity, time, and the properties of the coagulant itself. Our PAC is engineered to promote rapid and effective floc formation, which is essential for subsequent separation.

The formation of these larger flocs is critical because they increase the effective particle size and density, making them susceptible to gravitational settling (sedimentation) or easy capture by filters. The sedimentation stage is where the majority of these flocs, carrying the trapped impurities, settle at the bottom of the treatment tank. The clarity of the water above the settled sludge is a direct indicator of the effectiveness of the coagulation and flocculation processes.

The advantages of using PAC in these processes are numerous. Its high charge density means it can achieve effective charge neutralization with lower dosages compared to traditional single-ion coagulants like aluminum sulfate. This leads to less residual metal in the treated water and reduced sludge production. Furthermore, the specific polymeric species within PAC, such as the Al13 complex, are known for their superior bridging capabilities, resulting in stronger and faster-settling flocs. Ningbo Inno Pharmchem Co., Ltd. focuses on producing PAC with optimized polymeric structures to maximize these benefits, ensuring efficient and cost-effective water treatment for a cleaner environment.