Complementary Processes

Treatment of Dredged Silts

Soils washing and stabilization techniques are equally applicable to the treatment of dredged sediments from polluted canal, river and harbours.    The combination of clean material recovery, mechanical dewatering and sludge solidification provides the potential for significant cost savings.

The dredging can be carried out from pontoon mounted excavators and barges or traditional cutter suction equipment.

Ex-situ Chemical Oxidation

Ex-situ chemical oxidation is the process of adding an oxidizing agent into the soil matrix in order to break down organic contamination.   The most common application is for the removal of chlorinated solvents, however it can also be employed as a pre-treatment of soils heavily contaminated with TPH and PAH prior to a standard bioremediation.

HBR mixing plants incorporate feed systems, which are suitably resistant to the corrosive nature of oxidizing agents and capable of the control and collection of gasses produced during the reaction.

Permanent Containment

HBR can design and construct containment systems to encapsulate the contamination in the soil and the groundwater by using different techniques.

Vertical techniques used are containment through the use of sheet piles, permeable bentonite barriers, clay barrier walls, biologically active barriers, reactive barriers and funnel and gate systems.