|
|
|
|
The HMR-2 is a continuous flow precipitation and clarification
system. The HMR incorporates individual chambers designed
to perform the following functions:
- pH Neutralization / Solids Precipitation
- Precipitate Flocculation
- Gravity Settler / Clarification
- Effluent Collection Clearwell
- Integral Sludge Ageing Chambers
The wastewater from the flow equalization tank is pumped
into the HMR Reaction Chamber 1. This chamber is designed
as a stirred tank reactor utilized for reacting the metal
bearing influent through the addition of reagent chemicals.
This reactor is equipped with pH measurement instrumentation
used for proportional feed of reagent chemicals.
The effluent from the Reaction Chamber 1 flows by gravity
into the pH Neutralization Chamber 2 where final pH adjustment
occurs. This chamber is designed as a stirred tank reactor
utilized for pH Neutralization the influent through the
addition of reagent chemicals. This reactor is equipped
with pH measurement instrumentation used for proportional
feed of reagent chemicals.
The effluent from pH Neutralization Chamber 2 flows by
gravity into flocculation chamber of the HMR. This chamber
is also designed as a stirred tank reactor utilized for
flocculation of the precipitates. Anionic polymer is injected
to coagulate the precipitate, which allows for rapid settling
in the subsequent clarification process.
The flocculated precipitate from the Flocculation Chamber
flows by gravity into the Clarification Chamber. This
chamber is designed as an up-flow, inclined plate type
clarifier, which provides for gravity settling of the
precipitate. The chamber is fitted with chevron style,
inclined tube modules, which provide the settling surface
area, required for the clarification process and creates
the laminar flow environment necessary for effective clarification.
The precipitate enters the clarifier and settles to the
chamber bottom where it is then automatically pumped to
the Sludge Age Tanks. The precipitate free effluent emerges
from the clarifier and flows by gravity to the Effluent
Clearwell Chamber where the effluent is pumped through
a duplex multi media filter system, provided by others,
to remove any suspended solids.
The HMR utilizes the dual internal sludge age tanks to
allow the sludge to thicken prior to dewatering in the
existing plate and frame filter press. One chamber is
filled while the other is allowed to thicken the sludge.
This improves the efficiency of the filter press and reduces
the pressing cycle. As the slurry settles, any supernatant
is manually decanted and pumped back to the system to
be retreated.
HMR
Continuous Flow Precipitation Systems - Cut Sheet
|
|
|
|
