Section Env-Wq 714.01 - Trickling Filters: General Requirements(a) Biological trickling filters shall only be used when the sewage is amenable to treatment by aerobic biologic processes.(b) Trickling filters shall be preceded by effective settling tanks equipped with scum collecting devices or other suitable pretreatment facilities and followed by secondary settling tanks in accordance with Env-Wq 711.02 through Env-Wq 711.08.(c) Trickling filters shall be designed either as low-rate or high-rate filters which incorporate recirculation. Reduction in BOD5 in primary settling tanks shall not exceed 35 percent for filter design criteria.(d) Design submittal requirements shall be as specified in Env-Wq 703.(e) WWTF design shall provide for multiple trickling filters capable of passing peak hourly flow with one unit out of service and of meeting process requirements with all units on line.N.H. Code Admin. R. Env-Wq 714.01
(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.