In 2023, Brennan acquired the dredging and dewatering division of Infrastructure Alternatives, Inc (IAI). IAI served clients in dredging, dewatering, and water treatment for over two decades, including Brennan. With the acquisition, IAI's team of skilled operators and water treatment experts joined Brennan, bringing with them their expertise, equipment, and system designs. Together, we perform high-quality dredging, environmental remediation, dewatering, and water treatment services to clients throughout the United States.
We perform treatability testing on dredged materials, sediments, industrial residuals, and sludges in our laboratory. After testing is complete, we recommend and select the most efficient means and methods for dewatering the material and the separated water.
A specialized test we perform is called a geotextile tube dewatering test (GTDT). This test may also be referred to as a pillow test and replaces the hanging bag test. A GTDT involves pouring sediment or other material to be dewatered into a small-scale geotextile tube. The flow rate, turbidity, and suspended solids content of the water passing through the geotextile tube fabric, weep water, or filtrate are evaluated.
Prior to the GTDT, our in-house chemist will perform a polymer screen and rapid dewatering test (RTD) to identify a chemical conditioning program for the material to be dewatered. These programs may be single or dual applications, depending on the chemical composition and physical properties of the material. The results of the polymer screen are provided to the client with our recommended LB per dry TON dose(s).
Our team has lab-scale filters for evaluating the performance of various types of media. We can also perform flocculation and settling tests to evaluate chemical addition and clarification processes for removing solids and associated contaminants.
Treatability test results are summarized and provided to clients with a photo log. Based on our experience with geotextile tube dewatering and water treatment, we can also provide recommendations for full-scale project design and implementation.
High-speed material separation and dredged material dewatering are imperative to any environmental dredging project. Dewatering details are on our website here.
818 Bainbridge Street
La Crosse, WI 54603
Phone: 608/784-7173
Fax: 608/785-2090
Payroll Fax: 608/881-6519
24/7 Service
Call 800-658-9027
Copyright © 2015 J.F. Brennan Co. Inc.