It is difficult to find much information about value on a per-ton basis. Most research data discusses this on a "per-cow" or "per-cwt-milk-produced" basis. I did find a case study where two dairy farms sold their solids (separated after digestion) for $15-$20 per ton. The lower number was the price for users that picked it up at the dairy farm. The higher number did not specify if it was delivered or picked up at the farm. Both farms were selling it for dairy bedding and as a soil amendment—the price received was the same in both cases. Using some other numbers supplied in the case study and back-calculating, it appears that these are consistent with the research data I mentioned at the beginning. Because separated solids are a replacement for something else, like bedding, their value is determined by comparison to the primary bedding sources in your area and adjusting based on real or perceived advantages/disadvantages of your product. The higher moisture content of solids (60-75% moisture) compared to sand or sawdust will mean that the market for manure solids is likely to be more localized (it is expensive to haul water). Some farms view manure solids unfavorably in terms of cow health and milk quality in relation to other bedding options, although most research data indicates that they should not have any adverse effects on these. The value of these digested solids for other uses: a) Fertilizer—they are regarded as having little value as a plant fertilizer. When the solids are separated after digestion, most of the nutrient value remains in the liquid (which is an excellent fertilizer). However, it does have some value as a soil amendment. It may be worthwhile to conduct some market research to determine if gardeners, nurseries, construction companies, or others would be interested in the product. This research needs to consider customer requirements and demand, distance to market, competition, and cost of processing to get the material ready for sale. More information is available in a slide set by Ron Alexander from the 9th Annual Biocycle Conference. b) Energy source. It is possible to estimate the fuel value if the ash content (% dry basis) and the moisture content are known from laboratory analysis and if the applicable price (spot, future contract, etc.) per BTU of the primary fuel source is known from market reports. See also FAQ #39991 What is the energy value of livestock manure? The value of digested manure solids for any of those uses is highly dependent on local conditions—supply and demand will ultimately set the market price, but the above guidelines should be a good starting point.

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