noun
Primarily used on beer cans to indicate that the beer has not been heat-pasteurized, preserving a fresher, draft-like taste. The literal meaning is 'nonthermal treatment'.
この缶には「非熱処理」と書いてあるから、生ビールのような味わいだ。
This can says 'nonthermal treatment,' so it tastes like draft beer.
非熱処理ビールは熱処理ビールよりフレッシュな風味が楽しめる。
Unpasteurized beer lets you enjoy a fresher flavor than heat-pasteurized beer.
Compound of 非 (hi, 'non-') + 熱処理 (netsushori, 'heat treatment'). A technical term from the brewing industry.