Resource Recovery

Recovery of Ammonia from Wastewater
Ammonia Recovery

Recovery of Ammonia from Wastewater

Ammoniacal nitrogen in wastewater can be separated as ammonia and recycled as highly purified and concentrated aqueous ammonia by utilizing HSJ-Acid Absorption Reactor and HSJ-Catalysis coupled with anti-complexation techniques. This technology meets discharge standards for heavy metals, COD and ammoniacal nitrogen. Among the benefits of this technology are  low operating costs, low power consumption, removing COD while reducing odors and improving of on-site operations. Cleaner production is achieved by eliminating ammonia gas leakages in a closed environment.

This technology works well for elements like niobium, tantalum, tungsten, molybdenum, zirconium, vanadium and other rare metals in nonferrous metallurgy, inorganic chemical industries, pharmaceutical industries, etc.

Recovery of Waste Acid

Recovery of Waste Acid
(contaminated with heavy metals and F ,Cl)

Hasky’s Waste Acid Treatment effectively removes fluoride and chloride as well as heavy metal pollutants which affect the ability to recycle acid. The purification, acid concentration and heat recovery do not require acid neutralization thereby reducing the amount of residue produced. The acid can then be recycled providing a comprehensive reutilization of waste water.

This technology reduces residue production by up to 90%, enabling recycle of waste acid with zero wastewater or gas emissions.  Energy consumption is reduced by recovering heat. For acidities greater than 48%, chlorine removal rates can be as high as 98% and fluorine removal as high as 97%.

Recovery of SO2
SO2 Recovery

Recovery of SO2

Desulfurization with organic amines can produce highly concentrated sulfur dioxide gas. This economical method has been used in nonferrous smelting industries, rare earth industries, etc. The SO2 in the flue gas is absorbed with liquid organic amine. When the liquid flows into the desorption tower, SO2 is desorbed from the liquid as gas as a result of heating with low pressure stream. The barren solution is transferred back to the absorption system.

This technology features desulphurization efficiency of up to 99.5%. The by-product of highly purified (99%) SO2 can be used to produce liquid sulphur dioxide, sulfur or used directly in the production of sulfuric acid.

platinum group metals recovery
Platinum-Group Metal Recycling

Platinum-Group Metal Recycling (Pt, Pd, Rh, etc)

Platinum Group Metal (PGM) recovery from industrial waste catalyst is not only economically attractive, but also enhances the utilization of resources and contributes to sustainable development. HSJ-ReHM Platinum Group Metal Recovery Technology utilizes not only the target ion’s size, coordination chemistry, geometry and selective bonding in order to achieve a highly selective separation of materials for recycling.

This technology is suitable for a wide range of solution conditions, such as high acidity, high salinity and more. This process is low energy and does not result in waste gas or residues.