Process for treating sludge and manufacturing bioorganically-augmented high nitrogen-containing inorganic fertilizer

一种污泥、混合料的技术，应用在生物废物制成的肥料、有机肥料、污水/污泥肥料等方向，能够解决不能满足等问题，达到减少物流的效果

Active Publication Date: 2010-03-31
ANUVIA PLANT NUTRIENTS HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Robinson does not meet the need for a new practical continuous stream process for producing fertilizer products with high nitrogen content (greater than 8% by weight nitrogen) and containing biosolids, which has the advantages of having a defined temperature, Pressure and reaction retention time

Method used

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  • Process for treating sludge and manufacturing bioorganically-augmented high nitrogen-containing inorganic fertilizer
  • Process for treating sludge and manufacturing bioorganically-augmented high nitrogen-containing inorganic fertilizer
  • Process for treating sludge and manufacturing bioorganically-augmented high nitrogen-containing inorganic fertilizer

Examples

Experimental program
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Effect test

preparation example Construction

[0092] The remainder of the process for forming 319 in the preparation 320 of pellets or granules includes standard fertilizer granulation techniques dedicated to high volume throughput plants. Especially in smaller throughput plants (which are considered to be those producing less than 25 t / d), pellet or granule products can involve several innovative technologies, such as: Either milling or spheroidizing the pellets or granules after extrusion, or involving simplification of the discharge from the pelletizer or pellet mill. When using a pelletizer or pelletizer, it is preferred to feed some recyclate 228 to the second mixer 314 as well as the pelletizer to adjust the percent moisture present in the mix. To the level that agglomeration or nucleation can occur during particle formation, such as: seed material in a dry state, i.e., dry fines 327, and fines produced by a crusher or mill 330, or low specification or recycled fertilizer product materials.

[0093] Other preferre...

Embodiment 1

[0113] In this example, if Figure 4 and Figure 10 As shown in the diagram, anaerobically decomposed biosolids previously dehydrated to 22% are directly received via a conveyor adjacent to the wastewater treatment plant. In the receiving area of ​​the fertilizer production plant, incoming biosolids first pass through a lumpbuster device, which screens out large foreign rocks or metals, before entering a large surge tank (capacity 24,000 gallons). Biosolids leaving the surge tank goes to a positive displacement pump which then pumps the sludge at 6600 lb / hr to the first agitator (twin shaft) for conditioning and mixing .

[0114] The established production plant can produce an average of 3 tons of 22% wet biosolids per hour, and within 1 year, the production plant operates at 90% efficiency. In order to ensure this output, on the basis of inputting 3.3 tons of wet biosolids per hour, the factory generates 3.8 tons of dry finished fertilizer products per hour (the ratio of s...

Embodiment 2

[0129] In Example 2, the same 3.3 tons of biosolids per hour are treated in the AM process as described in the preferred embodiment of the invention, however, all anhydrous ammonia is added to the pressure vessel to The ammonification is complete and ammonium sulphate salts are formed in the fertilizer mix. Although the fertilizer mix was not as fluid when formed as a melt, high head pressure and mechanical agitation were sufficient to allow the hot fertilizer mix to exit the pressure vessel as desired. In Example 2, no additional ammonia was sprayed into the mixer #2, or granulator. The remainder of this example is the same as described in Example 1 for the production of a small amount of fertilizer

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Abstract

The invention describes a new method for treating sludge, which can result in the production of high nitrogen organically-augmented inorganic fertilizer that incorporates municipal sludges or biosolids or organic sludges that can compete with traditional fertilizers such as ammonium phosphate, ammonium sulfate and urea on the commodity fertilizer marketplace. The method takes advantage of the thixotropic property of dewatered biosolids or organic sludge to create a pumpable paste-like material from the biosolids or organic sludge that is then treated with an oxidizer to reduce odorant effectsand an acid. This mix is then interacted with concentrated sulfuric and or phosphoric acids and an ammonia source or alternatively a hot or molten melt or salt of ammonium sulfate / phosphate to form afertilizer mix. The present invention controls the heat, atmospheric pressure and retention time of the fertilizer mix in the reaction vessel. When a fertilizer melt is formed ammoniation is subsequently completed by the specific use of vaporized ammonia. The invention can also be an add-on to commercial production of ammonium salts. The fertilizer produced by the present invention contains more than 8 wt. % nitrogen and preferably 15 wt. % nitrogen. The invention is oriented to be tailored to the biosolids production for individual municipal waste treatment plants in order to keep the fertilizer manufacturing plants of the present invention small with a minimization of logistics and liability.

Description

[0001] References to related applications [0002] This application claims priority to U.S. Provisional Patent Application 60 / 890,422, entitled "Method for Treating Sludge and Producing Bioorganically Enhanced High Nitrogen-Containing Inorganic Fertilizer," filed February 16, 2007, and in particular The entirety of the patent application is incorporated by reference. technical field [0003] The present invention relates to systems, devices and methods for treating sludge, and in particular to bioorganically enhanced high-nitrogen fertilizers for the production of fertilizers, particularly utilizing primary organic sludge including municipal dewatered sludge or biosolids, concentrated acids and ammonia. content of inorganic ammonium fertilizer) systems, devices and methods. The invention also relates to products prepared by the process of the invention. Background technique [0004] Disposal of sludge discharged from municipal sewage treatment plants is a serious and growi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05D9/02
CPCC05F3/00C05F5/00C05F7/00Y02W10/40Y02P20/145Y02A40/20C05F9/00C05G1/00
Inventor J·C·伯纳姆J·P·卡尔G·达姆斯
Owner ANUVIA PLANT NUTRIENTS HLDG INC
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