Dried organic sludge fertilizer and preparation method thereof

A drying sludge and organic fertilizer technology, applied in the field of fertilizers, can solve problems such as difficult to achieve sludge harmless, resourceful and commercialized treatment, refractory, degradable organic matter and pathogen pollution, etc., to achieve rapid drying and Passivation of heavy metal activity, regulation of plant metabolism, and the effects of promoting plant growth

Pending Publication Date: 2019-12-13
GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are some shortcomings in these treatment and disposal measures: throwing into the sea will pollute the ocean and has been banned; the incineration method has large investment in equipment, high operating costs, and air pollution; sludge landfill takes up a lot of land, polluting the surrounding environment and The standards required to meet groundwater bodies are also constantly increasing; traditional sludge composting is polluted by heavy metals, refractory organic matter and pathogens, which affects its agricultural promotion,

Method used

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  • Dried organic sludge fertilizer and preparation method thereof
  • Dried organic sludge fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] A method for preparing dried sludge organic fertilizer, such as figure 1 As shown, 1 ton of dried sludge with a moisture content of 30%, 20kg of quicklime, and 200kg of sawdust are placed in a kneader and stirred for 30 minutes, then aged at 80°C for 24h, and sprayed with 20kg in a disc granulator Phosphoric acid with a concentration of 85% is granulated. After stirring, add active bacteria at an inoculum of 10kg / t to continue granulation. Put the granulated granules in the fermentation tank for 30 days aerobic fermentation and mix with 200kg of earthworm feces. Evenly, the dried sludge organic fertilizer is obtained.

Example Embodiment

[0027] Example 2

[0028] A method for preparing dried sludge organic fertilizer, such as figure 1 As shown, 1 ton of dried sludge with a moisture content of 40%, 50 kg of quicklime, and 200 kg of grass charcoal are put in a kneader and stirred for 30 minutes, then aged at 60°C for 30 hours, and placed in a disc granulator to spray 50 kg Phosphoric acid with a concentration of 85% is used for granulation. After stirring, the active bacteria will be added at an inoculum of 10kg / t to continue granulation. The granules are placed in the fermentation tank for aerobic fermentation for 20 days and then mixed with 100kg of earthworm feces. Evenly, the dried sludge organic fertilizer is obtained.

Example Embodiment

[0029] Example 3

[0030] A method for preparing dried sludge organic fertilizer, such as figure 1 As shown, 1 ton of dried sludge with a moisture content of 45%, 70kg quicklime, and 200kg peanut meal are put in a kneader and stirred for 30 minutes, then aged at 60°C for 24h, and sprayed in a disc granulator 70kg of phosphoric acid with a concentration of 85% for granulation. After stirring, add active bacteria at an inoculum of 10kg / t to continue the granulation. Put the granules in the fermentation tank for 15 days after aerobic fermentation with 100kg of earthworm feces. Mix evenly to obtain dried sludge organic fertilizer.

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Abstract

The invention relates to the field of fertilizer and particularly relates to dried organic sludge fertilizer and a preparation method thereof. The dried organic sludge fertilizer is prepared from thefollowing raw materials in parts by weight: 100 parts of dried sludge, 2-10 parts of quick lime, 15-30 parts of auxiliaries, 2-10 parts of phosphoric acid, 1-5 parts of an active microbial agent and 10-20 parts of earthworm cast. The preparation method comprises the following steps: weighing the components in the raw material proportion; putting the dried sludge, quick lime and auxiliaries into akneading machine, performing uniform stirring, and performing aging; putting the aged mixture in a disk grain making machine, spraying phosphoric acid into the mixture in a granulating process, performing neutralizing, jetting a fermentation inoculant into the mixture, and keeping on granulating; and putting the granulated granules into a fermenting tank, performing aerobic fermentation for 15-30days, and uniformly stirring the granules with the earthworm cast to obtain the dried organic sludge fertilizer. According to the dried organic sludge fertilizer, a great number of organic matters, trace elements and the like contributing to plant growth can be generated through assistance of quick lime, auxiliaries and other additives by sufficiently utilizing massive nutrition contained in the sludge, and the activity and nutrition of organic fertilizer can be improved. Furthermore, the preparation method is simple, and materials are wide in sources and low in cost.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a dried sludge organic fertilizer and a preparation method thereof. Background technique [0002] With the continuous improvement of domestic sewage treatment rate and treatment degree in our country, the generated municipal sludge is also increasing year by year. Sludge has high moisture content and unstable properties, and its scientific treatment and disposal has become a public concern. The content of nitrogen and sulfur in municipal sludge is relatively high. Due to the influence of anaerobic microbial activities and ammonifying bacteria, reducing sulfide and ammonia are released into the atmosphere in the form of gas. Therefore, odor pollution is inevitable in the process of sludge production and transportation, making it one of the key issues in sludge stabilization treatment. [0003] At present, the commonly used sludge treatment methods include throwing into the sea, incine...

Claims

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Application Information

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IPC IPC(8): C05F17/00C05G3/00
CPCC05B17/00C05F17/00C05G3/00C05D3/02C05F3/00C05F7/00C05F11/00C05F11/08C05F11/02C05F5/002Y02W30/40
Inventor 黄文海陈春梅
Owner GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD
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