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Can TNM Derail Your Beneficial Use Program?

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While the 40 CFR Part 503 Rules have agronomic nitrogen requirements, increasing interest is being shown for total nutrient management (TNM) of land-applied biosolids to minimize phosphorus migration to the watershed and to prevent downstream eutrophication. At the national level, the National Resource Conservation Service (NRCS) recommends limiting biosolids phosphorus loadings to agronomic rates. A growing number of states also subscribe to this concept, either through formal regulations or through policy trends.

However, land application of biosolids at phosphorus-dictated agronomic rates can be a difficult proposition for many utilities. These difficulties include limitations of current application equipment, availability of adequate land area, and disparate fertilizer value of the different biosolids nutrients.

The proposed paper will review the current issues affecting TNM biosolids application and discuss on-going policy trends observed at several state regulatory agencies. The results of a recent evaluation of the Fayetteville, Arkansas biosolids management system will be discussed, illustrating issues surrounding the move to TNM from current biosolids land application practices.
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Document Type: Research Article

Publication date: 2002-01-01

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