Zero Liquid Discharge (ZLD) describes a process that completely eliminates liquid discharge from a system. The goal of any well-designed ZLD system is to minimize the volume of wastewater that requires treatment, process wastewater in an economically feasible manner, while also producing a clean stream suitable for reuse elsewhere in the facility. Interest in ZLD technology has grown in the industrial manufacturing sector over the past decade. Companies may begin to explore ZLD because of ever tightening wastewater disposal regulations, company mandated green initiatives, public perception of industrial impact on the environment, or concern over the quality and quantity of the water supply.
By ENCON Evaporators based in Hooksett, NEW HAMPSHIRE (USA).
Flexible, turnkey solutions for container cleaning. Cleaning industrial containers such as canisters, vats or IBCs produce large volumes of effluent. The type of impurities in this effluent depends heavily on what has been transported in the containers. That’s why effluent treatment requires a flexible system able to cope with all conceivable contaminants. Reconditioners are increasingly using modern vacuum distillation systems to do this. They work fully automatically, guarantee a high level of process reliability, minimal residue, and render a zero liquid discharge container cleaning process.
By H2O GmbH based in Steinen, GERMANY.
A number of treatment products are often added to prevent corrosion, scaling and fouling. Coating of sensors and other effects of these products must be taken into account when selecting analyzers. Discharge monitoring needs special attention because zero measurements must be reliable over time with little maintenance.
By SWAN Analytische Instrumente AG based in Hinwil, SWITZERLAND.
Water is widely used in industry, whether it is encountered as raw water, process water or waste water. Very often this water must be treated before entering the process to ensure its quality and properties will meet the specifications demanded by the industrial process. In addition, with recent discharge regulations and policies towards zero liquid discharge, there is a high demand for solutions for recycling and reuse of waste water produced. Lenntech provides sustainable and complete solutions for water and waste water treatment for industrial water considering a wide range of technologies and strategies.
By Lenntech Water Treatment based in Delft, NETHERLANDS.
The process of electricity generation from fossil fuels such as coal, oil and natural gas is water-intensive. Between 40-50% of all water abstracted and used in developed countries is used in the generation of electricity. Thus, a reliable, abundant and predictable source of raw water supply to a power plant is a critical factor in site selection. Water supplies are required to provide various process waters for the following essential main purposes such as make-up water, cooling water for steam turbine condensers, and auxiliary plant cooling water.
The primary application of modern water treatment technology is to maintain the integrity and performance of the power plant. Critical plant applications have water purity or conditioning requirements that must be adhered to for safe, reliable and efficient power generation.
Experience has shown that integration of water technology treatments with power plant design can be very important in reducing operational problems and component failures
At power plant worldwide there are increasing limitations on water availability and environmental restrictions on discharges. This is expected to promote measures for water conservation and to have an increasing influence on water treatment decisions. At power plant, the recycling of internal wastewater streams can extend from the recovery of individual high-quality waste streams, which can be reused either directly or after only limited treatment, through to the development of fully integrated water/wastewater treatment systems for zero liquid discharge. However, the application of reuse schemes requires site-specific assessment, as not all waters may be viable options for recovery.
By Industrie De Nora S.p.A. | De Nora Water Technologies based in Milan, ITALY.
Treatment solutions for water and effluent from electroplating and galvanizing industry. Treatments of rinsing water and effluents obtained from surface treatments of: metals, special alloys, and plastic. SAITA provides plants and solutions such as: Zero discharge plant, recycling of rinsing waters, polluted baths’ filtration, chemical-physical treatment plants, demineralization and reverse osmosis plants and evaporators.
Chromating // Nickel-plating // Galvanizing // Electroless nickel // Aluminium anodizing // Phosphating // PVD // Wet vibrofinishing // Fashion accessories // Plastic metallization // Printed circuits PCB.
By SAITA srl based in Limena (PD), ITALY.
The HDD, trenchless and underground construction industry has realized the benefits and economics of recycling drilling fluid and slurry. With increased transportation costs and more stringent environmental enforcements and overall cost containment, the need for recycling is evident in all countries and across the range of trenchless applications. From maxi and mini HDD rigs to microtunneling and pipe jacking, packaged mud recycling units and mud reclaimers are an invaluable asset. The below diagram represents a closed loop zero discharge work site.
By Elgin Separation Solutions based in Stafford, TEXAS (USA).
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