Fertilizer — The primary use of Ammonium Sulfate is as a fertilizer for alkaline soils. In the soil the ammonium ion is released and forms a small amount of acid, lowering the pH balance of the soil, while contributing essential nitrogen for plant growth.
Food Additives | Acid Regulator (E517) — As a food additive, Ammonium Sulfate is considered generally recognized as safe (GRAS) by the U.S. Food and Drug Administration, and in the European Union it is designated by the E number E517. It is used as an acidity regulator in flours and breads.
Treatment of drinking water — In the treatment of drinking water, Ammonium Sulfate is used in combination with chlorine to generate monochloramine for disinfection.
Ammonium Sulfate — Centrifuges
Selection Criteria for SHS & CONTURBEX
|Solid concentration||Relatively constant feed conditions with solids concentrations starting at about 40%.||Very safe operation even with fluctuating solids concentrations due to forced solids transport.|
|Product washing||Highest product purities due to the long residence time of the product on the screen.||Good, but somewhat limited product purity due to shorter dwell time.|
|Solid throughput / yield||Smooth product transport, large solid cake height - and consequently less particle breakage - reduce solids losses to the filtrate and increase the yield.||Thinner solids layer provides rapid dewatering, but may result in more particle breakage and higher solids losses.
Application often in the separation of fine ammonium sulfate crystals.
|Residual moisture||Optimal dewatering of the crystals even at lower G-force and after a product wash due to long residence time on the screen.||Higher G-force ensures fast and optimal dewatering even with finer crystals.|
|Cleaning||The product remains in the screening drum after the feed stop. Unloading of the machine before restart by automated cleaning.||Self-cleaning effect due to the scroll - minimal residual amount of product remains in the screening drum after the feed stop. Machine can be cleaned even after a restart.|
|Sealing system||Vapour- and gas tight execution available.||Vapour- and gas tight execution available.|
Ammonium Sulfate Processes
Ammonium Sulfate out of ammonia gas and sulfuric acid
A) Synthetic production of Ammonium Sulfate out of ammonia gas and sulfuric acid.
Ammonium Sulfate — recovering out of wastewater
B) Recovering Ammonium Sulfate out of sulfuric- or ammonia containing wastewater from processes such as:
- Acrylnitrile (AN)
→ Acrylamide, glue, solvents
- Methylmethacrylate (MMA)
→ Acrylic glass (plexiglass)
- Caprolactam (CPL)
→ Polyamide 6 (textile fiber, foil).
Ammonium Sulfate as by-product (desulfurization)
C) By-product of the desulfurization of coke oven gas or ammonia-containing wastewater.