| Autor: |
Zhou, Yang, Zhi-Qiang, Zhang, Jing, Yang, Jin-Suo, Lu |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Huan jing ke xue= Huanjing kexue. 43(4) |
| ISSN: |
0250-3301 |
| Popis: |
The anaerobic environment of sewers is the main cause of the production of toxic and harmful gases such as hydrogen sulfide and methane. The installation of septic-tanks between the drainage standpipes and municipal sewage pipes has aggravated the current situation of poor ventilation in sewage pipes. A system of enhanced ventilation has been formed. By connecting the drainage standpipes and sewage pipes, the system of enhanced ventilation can ameliorate the ventilation of sewage pipes and improve the gas-phase space environment. The experimental and computational fluid dynamics (CFD) simulation methods were established to explore the law of oxygen gas-liquid mass transfer under the different sewage flow rates or wind speeds. This study aimed to seek a method to enhance the oxygen mass transfer, suppress the anaerobic environment, and achieve the purpose of long-term control of harmful gases. The results showed that increasing the gas-liquid flow rates can accelerate the oxygen mass transfer, and the volumetric mass transfer coefficient increased by 3.5×10 |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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