SCREW PRESS

When operating the screw press, adjustments may be necessary to achieve the desired moisture content in the solids. The moisture content can be controlled by adjusting the pressure at the outlet of the screw press. Here are some guidelines for making these adjustments:

TO OBTAIN DRIER SOLIDS:

Increase the pressure at the outlet of the screw press. This will result in a lower moisture content in the solids. However, keep in mind that increasing the pressure will reduce the flow rate capacity of the press.

TO OBTAIN WETTER SOLIDS:

Decrease the pressure at the outlet of the screw press. This will result in a higher moisture content in the solids. Lowering the pressure will increase the flow rate capacity of the press.

It is important to find the right balance between moisture content and flow rate capacity based on the specific requirements of your operation. Regular monitoring and adjustments can help optimize the performance of the screw press and achieve the desired results.

STARTING THE SCREW PRESS

To start the screw press, please follow these steps:

1. Ensure that the screw press filtrate is directed back to the piping before the microscreen and not discharged to the lagoon. This will ensure proper flow and prevent any unwanted discharge.
2. Open the solids door on the screw press. This will provide access to the press chamber for the introduction of manure.
3. Start introducing manure into the system. This can be done through the appropriate inlet or feeding mechanism.
4. Adjust the chemistry settings to minimize the liquid entrained in the solids. This may involve optimizing the chemical dosing or other relevant parameters to achieve the desired consistency and moisture content in the solids.
5. Allow some time for the screw press to operate and for the plug to form within the press chamber. This process can take up to an hour or longer. As the plug forms and compacts the solids, they will gradually achieve a putty-like consistency.

It's important to monitor the operation of the screw press during this process and make any necessary adjustments to optimize the performance and achieve the desired solid consistency.

OPERATING THE SCREW PRESS

To operate the screw press effectively, please follow these guidelines:

1. Once the screw press is set up and running, it requires minimal operator attention. However, periodic inspection of the solids being produced is necessary to ensure that the plug remains intact and doesn't get pushed out of the press chamber.
2. During screw press operation, some solids may pass through the screen and accumulate inside the screw press. This buildup of solids can reduce the capacity of the screw press over time. It is important to inspect and clean the screw press screen on a weekly basis to prevent any reduction in capacity that may affect the overall system operation.
3. During screw press operation, some solids may pass through the press along with the liquid and accumulate in the screw press liquid holding tank (V-130). These solids can sometimes form flocs inside the tank, leading to issues with the level switch and the operation of the P-130B pump.

It is recommended to inspect and clean tank V-130 on a daily basis to prevent the buildup of solid flocs inside the tank.

Regular maintenance and cleaning of the screw press components will ensure its optimal performance and prevent any operational issues that may arise due to accumulated solids.