Erik_V
Civil/Environmental
- Aug 8, 2017
- 10
I am working on a strategy for solids removal, from an effluent stream that is derived from fermented food. The food is de-watered first through a mesh vibratory screen, filtering out particles above the smallest sieve size (I believe this is 40 microns or larger, however I can check detail again if the answer if needed). Because the stream is also acidic, I have picked hydrated lime as a combined neutralizing agent and coagulant. Despite this, the settling is still hindered. I would describe the mixture as being relatively high in dissolved minerals, acetic acid, lactic acid, glucose, along with other characteristics attributable to a food derived leachate.
I understand that this problem could have a multitude of causes (dissolved mineral content is high, for instance, so surface charges are likely abundant on the dissolved material). Could anybody recommend a coagulant that would still allow the settled solids to be land applied? We are a private business, and the bulk of our dried solids will be applied as a soil conditioner, including content from the settling tank. I've considered Iron coagulants, but ultimately this is an area where my experience is only theoretical.
Thanks in advanced for any help.
- Erik
I understand that this problem could have a multitude of causes (dissolved mineral content is high, for instance, so surface charges are likely abundant on the dissolved material). Could anybody recommend a coagulant that would still allow the settled solids to be land applied? We are a private business, and the bulk of our dried solids will be applied as a soil conditioner, including content from the settling tank. I've considered Iron coagulants, but ultimately this is an area where my experience is only theoretical.
Thanks in advanced for any help.
- Erik