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 2
Project Description
The Bayport CDF in Green Bay, WI (Figure 1), was selected as the field
demonstration site. Green Bay is located on the eastern shoreline of Wisconsin,
on Lake Michigan. Approximately 115,000 cu m (150,000 cu yd) of sediment
are dredged annually, to maintain the 29-km- (18-mile-) long shipping channel in
the Port of Green Bay. The Bayport disposal facility was filled to design
capacity in the early 1970's. Brown County sought and received authorization to
dispose of additional dredged material there. Current operations involve
mechanical dredging, with transport and offloading at the CDF by truck. To
extend the life of the facility as long as possible, material is periodically removed
from the facility, following a period of dewatering. The facility is divided into
separate cells to permit offloading, dewatering, excavation, and stockpiling to
occur concurrently. The Brown County Port Authority has taken an active
interest in innovative management alternatives for dredged material, and the
Bayport CDF was also recently the site of a biotreatment demonstration.
Project Activities
ERDC physical separation equipment available for demonstration/testing
support was inventoried and its operational status verified. Response to an
advertisement for technical support in identification of equipment alternatives
and sources and development of a basic treatment train was limited (one firm
responded) and exceeded the project budget for this task area. An extensive in-
house effort was therefore initiated to locate off-the-shelf equipment, and to
identify those firms with interest in conducting a small demonstration and with
availability of suitable scale equipment for preliminary field evaluation. Of the
vendors contacted, only two indicated an interest in bringing equipment onsite
for a small-scale demonstration: Tri-Flo Industries, Ltd., of Conroe, TX, and
MetPro Supply, Inc., of Bartow, FL. Only one, MetPro Supply, responded to the
advertisement for bids.
Tri-Flo Industries manufactures mobile, self-contained, fluid-processing
equipment. Initially targeting the drilling industry, hydrocyclones mounted in
series to a prefabricated header can be purchased, as well as complete, mobile,
micro-fluid systems (MFS) designed for drilling mud recovery. These systems
include a sump, mud "guns" for maintaining sediment in suspension, a shaking
screen, hydrocyclones, and pumps. The configuration appears to have potential
for sediment separation, but prescreening of gross oversize and slurrying of
consolidated material would likely be needed to utilize the equipment as
5
Chapter 2 Project Description
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