N.J. Admin. Code § 7:14A-23.18 - Chemical coagulation
(a) This method of
sewage treatment is considered to be a degree of treatment intermediate between
sedimentation, and sedimentation plus oxidation. Chemical coagulation will not
be considered as a substitute for oxidation.
(b) Coagulants shall be applied to the sewage
in a suitable and approved form proportional to the sewage flow.
(c) A chamber or tank for the rapid and
thorough mixing of the sewage and coagulants shall be provided with a detention
period of not less than one minute based on design flow.
(d) Two or more flocculation tanks, with
individual controls, shall provide a combined detention period of between 20
and 30 minutes. Diffused air or paddles with a slow rotary motion shall be
provided for continuous agitation of the full content of the flocculation
tanks.
(e) The automatic control of
apparatus for feeding chemicals shall include equipment to provide variation in
chemical dosage with variation in sewage flow.
Notes
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