基于TUD模型模拟优化MSBR工艺反硝化脱氮除磷
Simulation and optimization to the denitrifying phosphorus and nitrogen removal of MSBR based on TUD model
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摘要: 基于TUD模型（delft university of technology model）对实验室MSBR（modified sequencing batch reactor）工艺进行了模拟与优化，强化反硝化除磷，以提高系统脱氮除磷效率。结果表明，工艺运行参数为厌氧池90 min、好氧池90 min、SBR池缺氧段150 min、污泥回流比1.0和污泥龄15 d时，MSBR工艺COD、TN以及磷酸盐去除效率达95%，92%和83%；SBR池缺氧段吸磷量达到23.20 mg/L，占系统总吸磷量43%左右；好氧池和SBR池缺氧段平均吸磷速率分别为0.35~0.42和0.12~0.17 mg PO3-4-P/(L?min）。TUD模型能够较好模拟各水质组分在MSBR工艺空间和时间上的浓度分布，COD和NH+4-N的模拟误差低于15%，PO3-4-P模拟值高于实测值5%左右。Abstract: Based on TUD model (delft university of technology model)， a bench-scale MSBR (modified sequencing batch reactor) was simulated and optimized to enhance denitrifying phosphorus removal for improving nitrogen and phosphorus removal efficiency. The resulted showed that when the hydraulic retention time of anaerobic tank， aerobic tank and anoxic phase of SBR， sludge return ratio and sludge retention time were 90 min， 90 min， 150 min， 1.0 and 15 d， respectively， COD， TN and phosphorus removal rates were about 95%， 92% and 83%. The phosphorus uptake capacity in anoxic phase of SBR was up to 23.20 mg/L， which was 43% of the total phosphorus uptake. The mean aerobic and anoxic phosphorus uptake rate was 0.35~0.42 and 0.12~0.17 mg PO3-4-P/(L?min）， respectively. TUD model could model the timely concentration distribution in the MSBR well， wherever simulation error of COD and NH+4-N was lower than 15%， the simulated values regarding PO3-4-P were 5% higher than the measured ones.
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Key words:
- TUD model /
- denitrifying phosphorus removal /
- MSBR /
- simulation /
- optimization
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