A new technique for treating fluorine wastewater to reduce sludge and running costs

This technique utilizes a small amount of Al(OH)/sub 3/ not only as an aggregator for CaF/sub 2/ but also as an effective fluorine adsorbent. The Al(OH)/sub 3/ is used repeatedly through an Al(OH)3 reclamation process. This technique can effectively treat the concentrated fluorine wastewater and eliminate the high-level treatment step. We constructed a practical treatment system simply by modifying part of an existing conventional system. This new treatment system reduced both the total sludge and running costs to about one tenth those of a conventional treatment system.