Internal electrolytic filler (rubber wastewater treatment)

The treatment of rubber auxiliary wastewater is one of the most challenging aspects in the production of rubber additives. This type of wastewater typically contains high levels of inorganic salts, organic sulfur compounds, and has a very high chemical oxygen demand (COD), making it difficult to manage using conventional methods. For instance, while the rubber vulcanization accelerator NS is non-toxic in its structure, the traditional sodium hypochlorite oxidation process can generate 4–5 tons of highly saline and organically contaminated wastewater for every ton of NS produced. This kind of wastewater is not easily biodegradable, posing significant challenges for wastewater treatment systems. The main difficulties in treating rubber auxiliary wastewater include: 1. **High Salinity**: The production of key rubber additives such as sulfenamides, thiazoles, thiurams, and carbamates often involves acid-base regulation or oxidation steps, which result in large amounts of salt byproducts like sodium chloride or sodium sulfate. Some products may contain salt concentrations exceeding 7%, significantly complicating the treatment process. 2. **High Concentration**: To maximize output and reduce wastewater volume, manufacturers often increase reaction concentrations. This leads to mother liquor with extremely high COD levels, sometimes reaching tens of thousands of mg/L. Without proper pretreatment, this can severely impact the microorganisms in biological treatment systems. 3. **Diverse and Variable Pollutants**: Rubber auxiliaries come in many forms—accelerators, vulcanizing agents, anti-aging agents, coupling agents, and processing aids. While some are used in large quantities (over 10,000 tons annually), most are produced in smaller volumes, often below 3,000 tons per year. This variety leads to a wide range of raw materials, reactions, and by-products, resulting in complex and fluctuating pollutant compositions. Additionally, changing market demands cause frequent shifts in product mixtures, further complicating wastewater treatment strategies. Given these challenges, general wastewater from rubber additive production is highly complex, with high color intensity, high COD, high salinity, and poor biodegradability. It is not suitable for conventional biological treatment methods. Our company employs a two-stage micro-electrolysis followed by a two-stage Fenton process, which has proven effective in numerous applications. This system delivers stable and reliable results, especially in removing COD and aniline. The micro-electrolysis process works by: 1. Reducing hexavalent chromium to trivalent chromium 2. Converting mercury ions into elemental mercury 3. Transforming nitro groups into amino groups 4. Oxidizing or reducing chromophoric groups in azo dyes to achieve decolorization and degradation At Weifang Puyinworun Environmental Protection Technology Co., Ltd., we specialize in providing comprehensive solutions for industrial wastewater treatment. Whether you need technical consultation, micro-electrolysis experiments, project case studies, or information on iron-carbon fillers, our team is here to help. With years of experience and a strong commitment to quality, we offer tailored solutions that meet your specific needs. For all our customers, your satisfaction is our priority. As water treatment experts, we pride ourselves on delivering professional, effective, and innovative solutions. Contact us today to learn more about how we can help you achieve cleaner, safer water. Call our micro-electrolysis technical hotline now and let us solve your wastewater challenges together!

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