Preliminary Treatment in MBBR Process

In the MBBR (Moving Bed Biofilm Reactor) process, primary treatment typically consists of two stages: pre-treatment and primary biological treatment.

1. Pre-treatment Stage:

- This stage aims to remove large particles, solid suspended matter, oils, and other easily separable impurities from the wastewater. Common pre-treatment methods include screening, sedimentation tanks or sand traps, and grease and oil separators. These pre-treatment facilities help reduce the solid load in the wastewater, prevent clogging of the media, and protect the MBBR system from excessive pollution.

2. Primary Biological Treatment Stage:

- In the primary biological treatment stage, wastewater passes through MBBR reactors filled with a large quantity of moving media, such as plastic carriers. These carriers provide ample surface area to promote microbial attachment and growth. Microorganisms attach to the surface of the media, forming a biofilm, and utilize biological degradation processes to remove organic compounds, nitrogen, phosphorus, and other pollutants from the wastewater. The MBBR system also provides oxygen supply to maintain microbial respiration requirements.

In summary, the primary treatment stage in the MBBR process removes large particles and solid suspended matter through pre-treatment, followed by biological degradation facilitated by biofilm formation on the media, resulting in effective treatment and purification of wastewater.