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Board denies petitions seeking moratorium on alkaline hydrolysis; rules already require prion inactivation validation
Summary
Three similar petitions asked the Board to halt alkaline hydrolysis and prevent effluent from entering wastewater systems due to prion concerns; the board denied the requests after staff explained WAC 246‑500‑53 requires autoclave‑equivalent treatment or third‑party validation demonstrating prion destruction.
The Washington State Board of Health on Jan. 13 declined petitions that sought a temporary moratorium on alkaline hydrolysis, restrictions on discharge of process effluent to wastewater systems, and limitations on application of biosolids derived from treated effluent, citing existing board rules that require validation that reduction processes achieve sterilization and prion destruction.
Board staff explained how alkaline…
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