PROJECT EXPERIENCE
CITY OF KALAMAZOO
KALAMAZOO WATER RECLAMATION PLANT –
INDUSTRIAL PLASTICS AND MUNICIPAL SCREENING
STUDIES / FINE SCREEN FACILITY
Kalamazoo, Michigan
The Kalamazoo Water Reclamation Plant (KWRP) requested
an engineering study to investigate alternatives to improve the
removal of industrial plastics from the discharge of a recycled
paperboard mill. The KWRP receives industrial wastewater
from the adjacent paperboard mill through a dedicated
interceptor sewer. The mill provides primary treatment
before discharging the wastewater to the KWRP. Prior to
mixing the industrial wastewater from the mill with the
KWRP municipal raw sewage, it is screened through a Hycor
Rotostrainer® system located in their Industrial Screenings
Building. The screens have generally been ineffective in
removing the finely chopped plastic material and consequently the material is causing
Project Elements
problems in downstream processes. The plastics have been found accumulated in the
Industrial Pre-treatment
Industrial Wastewater Screeningwastewater influent structures, plugging the plant effluent water system, intermixed
Screenings Handling
with sand media in the tertiary filters and in the sludge.
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Equipment Layout in New &
Existing Building
Key Team Members
Jim Broz
Jeff Glover
Services
Engineering Study
Period of Services
07/2003 to 12/2003
Cost:
$19,968 – Industrial Study
$24,900 – Municipal Study
$149,977 – Design
$84,136 – CPS
$2.213 M – Fine Screen Const.
Cost
Client Reference
Mr. Larry Fisher
Assistant Plant Engineer
269-337-8771
BLACK & VEATCH
The study concluded that retrofitting or modifying of the existing screening system or
the Paperboard mill treatment facility is not recommended and due to the nature of
the plastic material, removal at the source, grinding, chemical treatment, clarification
and skimming are not effective removal methods. The findings indicated that
screening is the most effective method of removal.
The Plant retained B&V to perform a study of the municipal screens and consider the
replacement of the existing course screens and/or the addition of fine screens to
resolve the finely chopped plastic material problem. The study developed several
course screen replacement and new fine screen alternatives as well as researched
screening and processing equipment. The study recommended the perforated plate
band screen as it the highest removal efficiency and is best suited to capture the
plastic material. Additionally, the study recommended replacing the course screen
with similar screens to remove the large objects and construct a new Fine Screen
Facility down stream to remove the finer material.
Subsequently, the KWRP plant staff requested B&V prepare construction documents
for the construction of a new Fine Screen Facility located downstream of the existing
course screens and grit chambers. The new facilitates included three 30 mgd band
screens and screenings processors that discharge into roll-off disposal containers.
The new equipment is located inside a new pre-engineered metal building that was
partially built on existing Primary Tank influent channels. The new metal building
includes an HVAC system, odor control (exhaust only), PEW system and electrical
Pursuit Name • 1
PROJECT EXPERIENCE
CITY OF KALAMAZOO
and instrumentation systems. The new electrical gear (MCC, controls, etc) was
installed in the existing Blower Building adjacent to the Grit Tanks. Site
improvements included extension of underground sanitary sewer, PEW piping and
electrical service and above ground odor control, replacement of site access road at
new building, new concrete pavement and other minor improvements. The Fine
Screen Facility was put in operation in February 2007.
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BLACK & VEATCH
Pursuit Name • 2