Don't know what raw materials your wine lees are made of For example: rice, sorghum, wheat, barley, corn, sweet potatoes, etc. Different lees utilization value is different, mainly depends on its raw materials, the use of pure rice or corn produced by the lees utilization value is higher, the other is not very high.

Wine lees can be used to make organic fertilizer usually feed value Bottom lees do fertilizer

Wine lees can be extracted protein: for example, with pure rice lees can be extracted rice protein powder

Wine lees can be used as a culture medium: mainly used in the culture of fungus

And then there is the feed used at that time is the most common.