The information provided in this literature contains merely general descriptions or characteristics of performance which in actual case of use do not always apply as described or which may

change as a result of further development of the products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of the contract.

For more information on the Advanced Reactive Media System contact:

Adam Szczesniak (860) 828-3309
adam.szczesniak@siemens.com. ADVANCED REACTIVE MEDIA SYSTEM

STATIC AND DYNAMIC LAB TESTING



### INTRODUCTION

To meet growing industry requirements for heavy metals removal, Siemens is developing a new Advanced Reactive Media System. The core of this proprietary treatment process is an iron containing media which is oxidized under carefully controlled conditions. The media acts as an electron generator to chemically reduce soluble metal cations and oxyanions to insoluble forms. During the reaction, the treated contaminants are removed by surface adsorption and chemical incorporation into iron oxidation products.

As part of this technology development effort, Siemens has created static and dynamic laboratory tests to assist in determining the feasibility of the system for metals removal.

STATIC TEST METHOD

Purpose

The static test determines if the Advanced Reactive Media System will be appropriate for the application on a “go / no go” basis for different contaminants of interest. A one to five gallon water sample is required for testing. Samples are shipped without the addition of any preservatives, which would alter the

characteristics of the water and invalidate the tests.

Procedure Upon receipt of the water sample, Siemens will complete an analysis of the as received water. The sample is analyzed for the contaminants of concern and other parameters needed for evaluation. Static Test Laboratory Apparatus

If necessary the sample pH is adjusted to the optimal range determined for the test water. Multiple aliquots

of the test water are then added to test containers containing a measured quantity of reactive media and other reagents. The containers are then sealed and placed on a rotary mixer. Sample containers are pulled off the mixer after predetermined mix times (e.g. 1, 2, 4, and 8 hours) based on the analyzed water quality. Samples removed from the mixer are filtered to remove the reactive media and quench the reaction. The filtrate is then analyzed and results

evaluated.

Results The target contaminant concentrations are examined and additional samples run if necessary. When complete, the results are evaluated to determine whether the Advanced Reactive Media System is capable of removing the contaminants to the target Concentrations. If so, in most cases the dynamic test will be performed. If not, other technologies may be evaluated for the water sample.The information provided in this literature contains merely general descriptions or characteristics of performance

which in actual case of use do not always apply as described or which may change as a result of further development of the products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms

of the contract.

For more information on the Advanced Reactive Media System contact:

Adam Szczesniak (860) 828-3309
adam.szczesniak@siemens.com. DYNAMIC TEST METHOD

Purpose The dynamic test determines the hydraulic retention time needed for the wastewater treatment parameters and provides a more definitive expectation of removal efficiency. The required water sample amount will vary between 55-300 gallons, based on results of the

static test.

Procedure Upon receipt of the water sample, Siemens will perform a water analysis to confirm that the sample is consistent with the samples used for the static test. The sample is analyzed for contaminants of concern and other parameters needed for the evaluation.

Dynamic Test Laboratory Apparatus

After completion of the initial water analysis, the

reaction chamber is filled with the test water containing reactive media. The test water is pumped to the reaction tank (either a single tank or two in series as determined by earlier evaluation) at a controlled flow rate and effluent samples are analyzed for targeted parameters The test is repeated at various flow rates to evaluate to determine what operating conditions are needed to successfully remove the targeted contaminants. The goal is to determine the shortest hydraulic retention time required to meet the treatment requirements. Results

The results will be evaluated to determine whether the Siemens Advanced Reactive Media System is capable of removing targeted parameters at

reasonable retention times.

After an application has been successfully evaluated using the static and dynamic tests, the next step for evaluation is an on-site pilot test. Siemens has pilot reactors available for conducting on-site testing and can provide a proposal for a pilot test program.