Refined fertilizer produced from sludge and producing method thereof

Abstract

The invention discloses a refined organic fertilizer and preparing method of sludge, which comprises the following steps: compounding piled raw materials; piling; turning the pile; ripening; drying in the hot cavity; sieving to obtain the product. The refined organic fertilizer contains composite sludge, organic amendment, inorganic amendment, matured accelerant, microbe grafting agent and adsorbant, which are blended completely according to certain proportion, wherein these materials are fermented for the second time, which are prepared into refined organic fertilizer.

Description

technical field

[0001] The invention relates to the technical field of municipal sludge treatment and fertilizer preparation, in particular to a refined organic fertilizer prepared from sludge and a preparation method thereof. Background technique

[0002] Municipal sludge is the sediment produced by sewage treatment plants after various levels of treatment to purify sewage. Sludge is rich in N, P, K, a variety of micronutrients and organic matter, and is a natural organic fertilizer. However, because it contains various toxic and harmful pollutants such as pathogenic bacteria, parasites (eggs) and heavy metals, there are great risks of hygiene, safety, environmental pollution and other risks in direct application, and resource utilization is restricted. Therefore, how to effectively make municipal sludge harmless, reduce its volume and make resource utilization, turn waste into wealth, and realize resource recycling has become a hot and difficult p...

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