The grit present in sewage is removed by a process called grit removal or grit extraction. Here are the steps involved:

1. Preliminary Treatment: The sewage water is first subjected to preliminary treatment which involves screening and grit removal. The screening process removes large objects that could potentially damage the sewage treatment equipment.

2. Grit Chamber: After screening, the sewage water is passed through a grit chamber. This is a wide, shallow channel where the speed of the flowing wastewater is slowed down to allow the grit to settle down by gravity. Grit includes sand, gravel, cinder, or other heavy solid materials that are heavier than the organic biodegradable solids in the sewage.

3. Sedimentation: The settled grit is then collected from the bottom of the chamber regularly to prevent it from becoming too full. This is usually done using a grit pump or an air lift pump.

4. Disposal: The collected grit is then washed, dewatered, and disposed of in a landfill or used in construction or road fill.

5. Secondary Treatment: The sewage water, now free of grit, is then subjected to secondary treatment which involves biological processes to remove dissolved and suspended organic compounds.

This process is crucial in sewage treatment as grit can cause excessive wear and tear on the treatment plant's mechanical equipment.

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The grit present in sewage is removed by a process called grit removal or grit extraction. Here are the steps involved:

1. Preliminary Treatment: The sewage water is first subjected to preliminary treatment which involves screening and grit removal. The screening process removes large objects that could potentially damage the sewage treatment equipment.

2. Grit Chamber: After screening, the sewage water is passed through a grit chamber. This is a wide, shallow channel where the speed of the flowing wastewater is slowed down to allow the grit to settle down by gravity. Grit includes sand, gravel, cinder, or other heavy solid materials that are heavier than the organic biodegradable solids in the sewage.

3. Sedimentation: The settled grit is then collected from the bottom of the chamber regularly to prevent it from becoming too full. This is usually done using a grit pump or an air lift pump.

4. Disposal: The collected grit is then washed, dewatered, and disposed of in a landfill or used in construction or road fill.

5. Secondary Treatment: The sewage water, now free of grit, is then subjected to secondary treatment which involves biological processes to remove dissolved and suspended organic compounds.

This process is crucial in sewage treatment as grit can cause excessive wear and tear on the treatment plant's mechanical equipment.

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The grit present in sewage is removed by a process called grit removal or grit extraction. Here are the steps involved:

1. Preliminary Treatment: The sewage water is first subjected to preliminary treatment which involves screening and grit removal. The screening process removes large objects that could potentially damage the sewage treatment equipment.

2. Grit Chamber: After screening, the sewage water is passed through a grit chamber. This is a wide, shallow channel where the speed of the flowing wastewater is slowed down to allow the grit to settle down by gravity. Grit includes sand, gravel, cinder, or other heavy solid materials that are heavier than the organic biodegradable solids in the sewage.

3. Sedimentation: The settled grit is then collected from the bottom of the chamber regularly to prevent it from becoming too full. This is usually done using a grit pump or an air lift pump.

4. Disposal: The collected grit is then washed, dewatered, and disposed of in a landfill or used in construction or road fill.

5. Secondary Treatment: The sewage water, now free of grit, is then subjected to secondary treatment which involves biological processes to remove dissolved and suspended organic compounds.

This process is crucial in sewage treatment as grit can cause excessive wear and tear on the treatment plant's mechanical equipment.

The grit present in sewage are removed by

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