New York/ New Jersey Harbor: Alternative Methods for Ex ... - CLU-IN

Figure 11: Unconfined Compressive Strength (UCS) Test on SOLFIX Final Products
Economic Analysis
Product UCS by Metcalf &
Eddy (psi)
UCS by BNL (psi)
SOLFIX on raw
screened sediment
728 102
SOLIFIX on ORG-
X treated sediment
600 487
The processing cost depends on which combination of the three processes: HYDRO-SEP,
ORG-X, and SOLFIX are used. The cost in Table 12 below gives the cost analysis for
three viable production options. The end-use product prices are derived from the same
source as those used in the NUIEG economic analysis. The average market price for fill
and cement are roughly $6 and $11 per cubic yard respectively. Taking into account that
about half of the dredged sediment is water, the revenue that would be generated by each
cubic yard of dredged sediment is approximately $3 and $5.50 for the production of fill
and cement respectively.
The estimated processing costs of the HYDRO-SEP and SOLFIX is $44 per cubic yard of
dredged sediment . The material produced by performing this process on one yard of
dredged sediment is worth approximately $3. As a result, Metcalf and Eddy would lose
roughly $6 per cubic yard of dredged sediment by using these processes. The HYDRO-
SEP and ORG-X processes cost $45 and generate approximately $5.50 of revenue per
cubic yard of dredged sediment. Factoring in the tipping fee, processing costs, and end-
product revenue, Metcalf & Eddy would lose about $4.50 per cubic yard of dredged
sediment. The processing costs associated with HDRO-SEP, ORG-X, and SOLFIX is
$67 per cubic yard of dredged sediment. The cement material produced by this
40