Real-time VFA monitoring device to maximize the efficiency of methane fermentation in anaerobic digestion.
The online VFA meter EZ7200 series is a high-performance online titration device designed for monitoring wet anaerobic digestion tanks. It proposes a new management method for medium to large-scale anaerobic digestion processes. In biomass power generation, industrial wastewater, and sewage treatment, the anaerobic treatment of wastewater and sludge in fermentation tanks involves the breakdown of very complex organic carbon compounds, which presents challenges. Real-time measurement of VFA (volatile fatty acids) is effective for stabilizing the methane fermentation tank in anaerobic treatment. Relying solely on pH measurement and sampling can make it difficult to monitor the conditions inside the fermentation tank, depending on the timing. The ideal pH value inside the fermentation tank is said to be between 6.5 and 7.5, but measuring pH alone is not sufficient; adequate buffering capacity [total alkalinity TAC (also referred to simply as alkalinity)] is necessary to compensate for changes in acid concentration. By continuously monitoring VFA, which are intermediate substances during methane fermentation, it contributes to maintaining a more stable fermentation tank and maximizing gas production. By conducting online measurements at 10-15 minute intervals, it becomes possible to anticipate various events within the digestion tank in advance.
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basic information
• Continuous monitoring in the anaerobic digestion process • High operational rate enabling maximum methane gas production • Low detection limit • Monitoring of methane fermentation decline due to VFA accumulation and data transfer functionality • Direct titration method unaffected by carbonates and without volatile fatty acid evaporation • Dedicated pretreatment equipment available
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Applications/Examples of results
Anaerobic digestion system Biogas, etc. ◆Reference Material "Notes on Biomethane Fermentation" https://hach.jp/catalog/544/ (Available for download from our website) ◆Correlation established with the laboratory spectrophotometer DR3900 https://hach.jp/catalog/1012/ (Available for download from our website)
Detailed information
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Example of installation locations for EZ7200 around the fermentation tank.
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Company information
Hack Japan, as the Japanese subsidiary of Hach Company, is engaged in the sales and service provision of a portion of Hach's product lineup. Since our establishment, we have been providing high-quality analyzers that are highly accurate and easy to use. We continue to uphold the values established by founders Clifford and Kitty Hach when they founded the company in 1947. For over 60 years, we have consistently provided the best solutions for water management and have been trusted by various industries. Our analytical instruments and reagents are used for water quality testing across a range of industrial sectors. Water analysis must be accurate. Hach supports water analysis experts by providing reliable and user-friendly products. 【Main Product Brands】 - Online TOC Analyzer BioTector Series - Various Dissolved Gas Analyzers Orbisphere Series - Online VFA Analyzer EZ7200 - Silica and Sodium Analyzers Polymetron Series - Laboratory TOC Analyzer QbD1200+ - Liquid Spectrophotometer (Color Difference Meter) LICO 620/290