1. scope of application
Upgrading, renovation and construction of urban and municipal sewage treatment plants
2. Brief description of technology
This project uses polyurethane materials as the framework. Through chemical modification and foam pore density adjustment, the hydrophilicity, wear resistance and matching of functional materials of polyurethane have been comprehensively improved, and functional carriers suitable for nitrification and denitrification have been selected. Load formula, and build a CAST-MBBR automated reactor. The polyurethane used has been added with anti-ultraviolet and corrosion-resistant components before foaming, which is not easy to wear and has a service life of up to 10 years. The surface of the polyurethane has been hydrophilic modified and combined with pre-hanging film technology, the number of bacteria in the body reaches 106 cfu/cm3 within 24 hours after being put in.
3. technical information
Volume specific surface area> 20000 m2/m3, water absorption> 300%, ammonia nitrogen 1.5, total nitrogen 10
4. comprehensive benefits
(1) Economic benefits generated before adopting this technology: Per 100000 tons of sewage treatment plant, upgrade from Level A standard to surface "quasi-Class IV water" ① Annual reduction of COD emissions: 100000 m3/d×365 d/year ×20 g/m3×10-6t/g=730 t/year ② Annual reduction of ammonia nitrogen emissions: 100000 m3/d×365 d/year ×3.5 g/m3×10-6t/g=127.75 t/year ③ Annual reduction of total nitrogen emissions: 100000 m3/d×365 d/year ×5 g/m3×10-6t/g=182.5 t/year ④ Annual reduction of carbon source use: 100000 m3/d×365 d/year ×10 g/m3×10-6kg/g=365 t/year 365 t/year ÷0.3 kg/m3×1.143 t/m3×0.135 million yuan/t= 1.87 million yuan/year (2) Compared with similar technologies, taking a sewage treatment plant with a scale of 100000 m3 as an example saves land area by 10~Saving electricity for 15 acres: >0.1 yuan/m3 Saving operation, operation and maintenance costs: >0.05 yuan/m3 Saving carbon source use: > 1 million yuan/year
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