Ammonia Stripper Brochure

DorsetLGL AmmoniA stripper Unique technologyRemoval of ammonia fromliquid manure or digistate.NO ventilation system NO air recirculation NO steam NO electric energy wastedIn areas with intensive animal pro-duction, large amounts of nitrogen present in liquid manure or digestate can be a limiting factor when consi-dering manure application rates on to arable land. Recycling of excess ammonia-nitrogen from animal manure in to a concentrated inorganic liquid concentrate is a desired outcome of a manure treatment system. The nitrogen concentrate cansupplement the application rate of nitrogen by animal manure, without resorting to chemical fertilisers to achieve optimum crop growth. Ammonia stripper withoutairflow so no energy wastedWorking principal NO ventilation system NO air recirculation NO steam NO electric energy wasted The development is a joint venture between Wageningen Agricultural University and Dorset Green Machines to have a robust, simple and low energy system forammonia removal from liquid manure. The LGL-Stripper iscurrently being tested at one of the university dairy farms, with a biogas plant, so both cattle manure and digestate can be stripped.Serial production isplanned to start in thefirst half of 2015. LGL : Liquid to Gas to Liquid During the first stage, ammonia is evaporated from the liquid manure into a closed-off gas phase. During the second stage, ammonia is recaptured from the gas-phase with sulphuric acid. The end-product is a liquid manure with max. 80 % ammonia-reduction and ammonia sulphate, which is a liquid concentrated chemical fertiliser. UniqueconstructionThrough the uniqueconstruction, there areno emissions of ammonia to the environment. There is no airflow, so no electricity consumption by the fans; one rotating ax is consuming max. 1 KW. Two storage tanks for the manure and the liquid sulphur acid, together with the pumps and control system make the system complete, easy and robust.Typical size of the LGL-Stripper:12 x 2,5 x 2,5 m.The capacity of theLGL-Stripper is variesdepending on: • type of product • ammonia content of the product • temperature of the product • pH value of the product • ph value of the sulphur acid solution. The above estimated capa-city is therefore an approxi-mation without guaranty of performance.Removal of ammonia from liquid manure or digistate.The system consists of rotating discs that are partly submerged in either the liquid manure or the receiving sulphur-acid solution. The rotating discs are close to each other so the ammonia coming into the gasphase is immediately absorbed at the other disc with the sulphur acid. To a certain level, there will be a continuous flow of ammonia from the manure disc to the sulphur acid disc.The level and speed of the ammonia- travel depend on the PH value and the temperature of the manure. Temperature PH Ammoniain kg/m3Ammoniaout kg/m3Capacitym3/hManure of cattle and pigsDigestateliquidphase15°C70°C108,34,54,52,02,0109WWW.DORSET.NURFID-Technology,electronic identificationAir cleaning, andsorting systemsDrying installationsto make use of residual heatDorset Green Machines B.V.Weverij 26 • 7122 MS Aalten • The NetherlandsTel. +31 (0) 543 47 21 03 • Fax +31 (0) 543 47 53 55gm@dorset.nu