cass生化池工艺流程
英文回答:reactor4
Basic Features of CASS Process:
CASS (Combined Anaerobic-Aerobic and Suspended Solids) is a combined anaerobic-aerobic wastewater treatment process that emphasizes the efficient removal of organic matter, nutrients, and suspended solids. The process consists of the following stages:
1. Anaerobic Reactor: Organic matter is degraded under anaerobic conditions in a suspended growth reactor. This produces biogas and VFAs (volatile fatty acids).
2. Anoxic Reactor: VFAs from the anaerobic reactor are further degraded in an anoxic reactor, where nitrate is used as an electron acceptor. This produces nitrogen gas and alkalinity.
3. Aerobic Reactor: The partially treated wastewater from the anoxic reactor enters an aerobic reactor, where the remaining organic matter is nitrified and oxidized.
4. Clarifier: The treated wastewater is separated from the suspended solids in a clarifier. The settled sludge is returned to the anaerobic reactor.
Advantages of CASS Process:
High organic matter removal efficiency.
Efficient nutrient removal (nitrogen and phosphorus)。
Production of renewable energy (biogas)。
Reduced sludge production.
Compact system design.
中文回答:
CASS 生化池工艺流程。
CASS(Combined Anaerobic-Aerobic and Suspended Solids)是一种厌氧-好氧联合污
水处理工艺,强调高效去除有机物、养分和悬浮固体。该工艺流程包括以下阶段:
1. 厌氧反应器,有机物在悬浮生长反应器中在厌氧条件下降解。这会产生沼气和 VFA(挥发性脂肪酸)。
2. 缺氧反应器,厌氧反应器中的 VFA 在缺氧反应器中进一步降解,硝酸盐用作电子受体。这产生氮气和碱度。
3. 好氧反应器,缺氧反应器中经过部分处理的废水进入好氧反应器,在那里剩余的有机物被硝化和氧化。
4. 澄清器,处理后的废水在澄清器中与悬浮固体分离。沉淀的污泥返回厌氧反应器。
CASS 工艺的优势:
有机物去除效率高。
养分去除效率高(氮和磷)。
可再生能源生产(沼气)。
污泥产量减少。
系统设计紧凑。
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