Current through Register No. 50, December 12, 2024
Section Env-Wq 712.02 - Chemical Coagulation: Flocculation Tanks(a) Flocculation following chemical coagulant mixing shall be completed in channels or tanks that meet the following requirements: (1) At least 2 flocculation tanks or channels having a combined detention period of between 20 and 30 minutes shall be provided;(2) Mixing shall be balanced to avoid under-mixing or over mixing such that: a.Chemicals are completely dispersed;b.Flocculated particles do not settle; andc.Flocculated particles are not sheared; and(3) Independent controls for each tank shall be provided.(b) Settling tank design shall conform to Env-Wq 711.(c) A means of dewatering all tanks shall be provided.N.H. Admin. Code § Env-Wq 712.02
(See Revision Note at chapter heading for Env-Wq 700) #8590, eff 3-25-06
Amended byVolume XXXIV Number 46, Filed November 13, 2014, Proposed by #10693, Effective 10/15/2014, Expires10/15/2024.