摘要:
Mixing machine, e.g. a compulsory mixer 1, comprising at least one drum 2 equipped with a device for forced mixing of raw materials into a ready product, where the drum has an opening for receiving raw materials and an opening for leading the ready product out of the drum, where at least one of the openings mentioned above is equipped with a safety grate 11 , where the safety grate for inlet and/or outlet is equipped with a device configured to generate oscillating motions 19 in the form of vibrations in order to avoid clogging of the grate by raw materials or ready mixed product.
摘要:
The invention relates to a method and an apparatus for separation of waste material comprising a solid fraction and a liquid fraction. The apparatus comprises: a base (10) , resilient means (11) connecting said base to a plurality of chambers (1, 2, 3) and vibratory means (12) coupled with said plurality of chambers. The plurality of chambers comprises a first chamber having at least one first screen (15) having a larger-sized mesh being provided at a lower part of the first chamber, a second chamber having at least one second screen (7) having a smaller-sized mesh being provided at a lower part of the second chamber, and a third chamber having a closed lower part (18) , preferably being provided with an outlet, (23) so that a resulting liquid fraction of the waste material is capable of being collected in the third chamber. In a possible embodiment, the apparatus also comprises a pressurising means for extracting a solid fraction from the waste material, initially to or subsequently to the vibrating motion. The invention highly increases the separation capacity of waste material such as livestock manure.
摘要:
The invention relates to a method of reducing emission of ammonia from animal manure and a plant for the method and a used of such a plant. The method comprises adding to the manure of both an acid compound such as sulphuric acid, H2S04, and of oxygen, O2. The acid compound results in the pH value dropping to below 7.0 whereby the emission of ammonia is substantially limited. The oxygen results in a very high activity of bacteria transforming organic nitrogen compounds to in-organic compounds that are possible for plants to assimilate when manure is spread in fields. Surprisingly, it has also should to be the case that the oxygen added, and thus the enhancing of the activity of the bacteria. results in a reduction of the amount of acid compound needed to he added and results in reducing, almost eliminating, the risk of hydrogen sulphide, H2S, being formed.