Entech Environmental Services, Australia

Entech was engaged by asteel maker to source and develop a reliable beneficial reuse market for 20,000 tonnes per annum of iron rich material. The material was analysed andfound to be rich in the elements iron, calcium and aluminium but also contained a range of contaminants. A review of potential reuse applications was then undertaken which found that the cement manufacturing process  could offer suitable reuse initiatives . However, it was found that the level of contamination of each by-product stream in isolation prohibited it from being used directly in the cement manufacture process. In order to address this issue a blending and quality control process was developed, that allowed several of the by-products to be mixed together to produce a valuable feedstock.

Entech was approach by one of Australia’s largest coal producers to assist with the consolidation of reporting waste management information. At the time they had a fragmented waste management structure with numerous suppliers providing different services. As a result, they were not able to report accurately on commercial, regulatory or environmental performance of their waste management practices.Entech implemented its state-of-the-art TWM, waste and resource tracking software system that streamlined waste reporting.

Entech was approach by one of Australia’s largest coal producers to assist with the consolidation of reporting waste management information. At the time they had a fragmented waste management structure with numerous suppliers providing different services. As a result, they were not able to report accurately on commercial, regulatory or environmental performance of their waste management practices.Entech implemented its state-of-the-art TWM, waste and resource tracking software system that streamlined waste reporting.

One of Western Australia’s largest gold produces generates 600 tonnes per annum of a highly hazardous residue containing up to 50% arsenic by weight. This residue is generated as the fume from the roasting of arsenic rich gold ore. The arsenic is present in the waste in the leachable from of arsenic pentoxide (As2O5)with ASLP leaching at 6000 mg/L.

Entech has the access to the Dolocrete^® technology to immobilise the arsenic so that it is safe for disposal. The treatment involves the mixing of Dolocrete^® with the residue using Dolomatrix’s mobile treatment plant.

The pyrometallurical recovery of zinc and lead results in the production of large quantities of sulfuric acid as a by-product., however this typically contains mercury.  Before the sulfuric acid can be sold as a commercial commodity, the mercury must be removed. Entech has the access to the Dolocrete^® technology to immobilise the mercury. The treatment involves the mixing of a sulfide reagent with Dolocrete^® with a high shear mixer in conformance with the regulators mixing policy.

Wood preserving plants use copper-chrome arsenate (CCA), creosote and pentachlorophenol (PCP) to impregnate telephone poles, fence posts, railway sleepers and wood of all types to preserve them against degradation when in use. Over time, these chemicals can enter the environment, contaminating the surrounding land.

Entech has the access to the Dolocrete® technology to immobilise the specific contaminants; arsenic, chrome, polyaromatic hydrocarbons (PAH) and PCP. The treatment involves the mixing of Dolocrete^® with a high shear mixer in conformance with the regulator’s mixing policy