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 exhibits a very high chemical oxygen demand (COD), making it difficult to manage effectively. For instance, even though the rubber vulcanization accelerator NS is non-toxic in structure, the conventional sodium hypochlorite oxidation process used in its production generates 4–5 tons of highly saline and organically contaminated wastewater per ton of NS produced. This makes it hard to treat through biological methods. The main challenges in treating rubber auxiliary wastewater include: 1. **High Salt Content**: The production of common rubber additives such as sulfenamides, thiazoles, thiurams, and carbamates often involves acid-base regulation or oxidation steps. These processes result in large amounts of salt, like sodium chloride or sodium sulfate, with some products containing over 7% salt concentration. 2. **High Concentration**: To increase production efficiency and reduce wastewater volume, manufacturers often operate at higher reaction concentrations. As a result, the COD in the mother liquor can be extremely high—reaching tens of thousands of mg/L in some cases. If not pretreated, this can severely impact microorganisms in existing biochemical treatment systems. 3. **Complex and Variable Pollution Factors**: Rubber auxiliaries include accelerators, vulcanizing agents, anti-aging agents, coupling agents, and other processing aids. While some are produced in large quantities (over 10,000 tons annually), many are produced in smaller volumes (under 3,000 tons). This leads to a wide variety of products, raw materials, and reaction types, resulting in complex and changing wastewater compositions. Frequent shifts in market demand further complicate the consistency of pollution factors, making it difficult to design and maintain effective treatment systems. Rubber auxiliary wastewater is known for its complex composition, high color intensity, high COD, and high salinity. It is generally unsuitable for traditional biological treatment due to its low biodegradability. Our company has developed an advanced two-stage micro-electrolysis + two-stage Fenton process, which has been successfully implemented in several facilities. The system shows excellent performance in removing COD and aniline, ensuring stable and efficient wastewater treatment. The micro-electrolysis technology 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 chromophores in azo dyes to achieve degradation and decolorization At Weifang Puyinworun Environmental Protection Technology Co., Ltd., we specialize in providing expert solutions for wastewater treatment using micro-electrolysis technology. Whether you're looking for technical consultation, experimental testing, project case studies, or information on iron-carbon fillers, our team is here to help. We offer comprehensive guidance on filler applications, pH adjustments, and more. For all our customers, your satisfaction is our priority. As a leading water treatment expert, Puyinworun Environmental Protection delivers results that speak for themselves. Contact us today for a free consultation and learn how we can help solve your wastewater challenges. Let us turn your problems into solutions!

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