This rapport concerns a manure separation facility located on a large pig farm in Russia. The facility consists of different proceses to separate liquid and solids, and in the end extract ammonium from the liquid.
Problems exist with the ammonium stripper, which cloggs up with dry matter. This leads to the stripper not functioning properly.
The main purpose of this rapport is to identify some of the plant configurations, which have a negative impact on the process ability to reduce the amount of solids in the manure.
There are four main topics in this rapport:
- Defining and measuring reject quality
- Map the quality through the plant
- Analyze the area with the largest optimization potential
- Point out modifications and addition to optimize the plant
There has been conducted two 24 hours test of the reject quality. The result has been examined and evaluated to clarify, how the reject quality changes through the process. The results from these tests have revealed, that the clarifier phase doesn’t improve the reject quality much
This phase of the facility has been futher analyzed, and results have shown, that the configuration of the clarifiers and the properties of the reject, inhibits this process. On this basis it can be concluded that this process can be optimized.
A way to improve this process is to alter the general clarifier setup and improve the in/outlet conditions, in order to minimize disturbance in the tank. Improvement of settlement and scum removal is also a factor.
Even under ideal conditions the process reaches a point where settlement of solids proceeds very slowly. Numerous tests have showed that adding polymer after the decanter, improves the reject considerably. Therefore implementation of polymer adding before the clarifiers, will very likely, improve the quality of the reject.