Waste Water Treatment

Industrial Waste Water Recycling

Schematic of a waste water-free pretreatmentPrevention and reutilization are preferable to disposal. Against this background, recycling technologies have top priority when it comes to treating industrial waste water. From the planning and design stages, Eisenmann focuses on exploiting every opportunity to conserve and recycle water.

In many industries, a combination of resource recovery and waste water treatment can deliver a rapid return on investment (e.g. for environmental technology plants). For example, deploying an evaporator can eliminate waste water from a pre-treatment system. The waste water is evaporated and the distillate recycled, i.e. reused in the pretreatment process. That means a number of regulatory requirements and inspections no longer apply.

Waste water recycling in the printing ink industryAnother form of waste water recycling is DI water (deionized water) recirculation, e.g. at the DI water rinsing stations in pretreatment plants. This reduces freshwater consumption.

Waste water recycling frequently involves multiple treatment processes. For treating toxic waste water, for example, the Fentox® process can be combined with a biological process that causes the inhibitory substances in the water to become bioavailable. Often, a physical-chemical stage for the precipitation of inorganic compounds is followed by a biological process to remove the organic compounds. Another common configuration is a chemical-physical treatment process in conjunction with a membrane technique for reliably separating very fine particles. In accordance with the customer’s requirements and the possibilities offered by the site, these systems can be run with full or partial recirculation.

Our environmental technology specialists understand a wide range of applications, and can help you select the most suitable combination of processes for your needs, taking regulatory requirements and local conditions into account.