Industrial sludge treatment method and method for preparing various fertilizers by using treated industrial sludge

A technology of industrial sludge and treatment methods, applied in the direction of sludge treatment, sludge treatment, biological sludge treatment, etc., can solve the problems of environmental secondary pollution, farmland source pollution, groundwater pollution, etc., and achieve no secondary pollution , reduced tail gas odor, less pests and diseases

Active Publication Date: 2011-04-13
LIAOCHENG JINTAIYANG BIOCHEM
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This treatment method has the following disadvantages: first, it is easy to cause secondary pollution to the environment, especially to groundwater; second, the treatment cost is relatively high, and land occupation
Some farmers use the sludge to be landfilled directly as fertilizer without any treatment, resulting in unexplained crop yield reduction or death, and bringing non-point source pollution to the cultivated land that is invisible to the naked eye

Method used

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  • Industrial sludge treatment method and method for preparing various fertilizers by using treated industrial sludge
  • Industrial sludge treatment method and method for preparing various fertilizers by using treated industrial sludge
  • Industrial sludge treatment method and method for preparing various fertilizers by using treated industrial sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: first four sludge treatment methods

[0045] (1) Put the first four kinds of sludge into the fermentation sedimentation tank in any proportion, mix and stir, and dilute to 14-15 degrees Baume.

[0046] (2) Add industrial sludge weight 0.2‰ heavy metal ion trapping precipitant (DTCR) in the fermentation sedimentation tank to generate water-insoluble chelate salt, then add industrial sludge weight 0.1‰ flocculant polyacrylamide to make Precipitation of heavy metal products. The amount of this sediment is small and easy to handle.

[0047] (3) remove above-mentioned flocculent precipitation and obtain product sludge water, add the potato water of sludge water weight 1% in sludge water, utilize the aerobic bacteria in sludge water and the sugar in potato water to promote sludge, fermentation time: summer 48 hours, 60 hours in spring and autumn, and 72 hours in winter; the fermentation temperature is 60-65°C in summer, 50-55°C in spring and autumn, and 40-45°...

Embodiment 2

[0048] Example 2: Recycling of the first four sludge fertilizers.

[0049] (4) Use a mud pump to add two flocculants to the settled and fermented sludge water: polyacrylamide with a sludge water weight of 0.5‰ and polyaluminum chloride with a sludge water weight of 3-5‰; The sludge dehydrated by the filter is cake-like, with a moisture content of 70-73% by mass, and then crushed into particles of ≤1.5mm; the filtrate flows back to the fermentation tank as a diluent for recycling;

[0050] (5) Put 10Kg of enzyme bacteria, 15Kg of brown sugar and 0.5Kg of honey into a container, add 250Kg of water and stir well, place for 4 hours in summer, 8 hours in spring and autumn, and 24 hours in winter; mix 500Kg of rice bran and 500Kg of furfural residue Lay it flat on the indoor concrete floor with a height of 10-15cm, then sprinkle the above enzyme mixture evenly on the mixture of rice bran and furfural slag and stir well, avoid direct sunlight, place it for 24 hours in summer, and 36 ...

Embodiment 3

[0055] Example 3: The above four kinds of sludge and waste are made into fertilizers for transforming saline-alkali land into fertile land.

[0056] (9) Mix the powdered biological bacterial fertilizer produced in step 6 with the desulfurized gypsum of coal-fired power plant waste at a ratio of 1:4, pulverize into particles below 1.5mm, sieve and package as powdery fertilizer for transforming saline-alkali land.

[0057] (10) Mix powdery biological bacterial fertilizer, desulfurized gypsum, and bentonite in a weight ratio of 1:3:1, crush them into particles below 1.5mm, and send them to a disc granulator through a belt conveyor. After granulation, it is sent to the rotary dryer by the belt conveyor for drying, and the tail gas is dedusted, washed and vented through the treatment device. The temperature of the material out of the dryer is relatively high, and it is cooled by a rotary cooler to increase the particle strength and reduce moisture, and then pass through a coarse si...

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Abstract

The invention discloses an industrial sludge treatment method and a method for preparing various fertilizers by using the treated industrial sludge. The industrial sludge treatment method comprises the following steps of: after industrial sludge is diluted, adding a heavy metal ion capturing and precipitating agent DTCR and reacting the agent with heavy metal ions in waste solution so as to generate water-insoluble chelated salt; adding a polyacrylamide flocculating agent to ensure that the chelated salt forms flocculent precipitates; and removing the flocculent precipitates to obtain sludge water, and adding potato water into the sludge water to ferment the sludge. The method for preparing various fertilizers by using the treated industrial sludge comprises the following steps of: preparing a powdery biological bacterial fertilizer by taking the sludge water obtained from the treated sludge as a raw material; and preparing a granular organic fertilizer and a fertilizer for changing saline and alkaline lands into fertile farmlands by taking the powdery biological bacterial fertilizer as a raw material. The industrial sludge treatment method has low cost and does not cause secondary pollution to the environment. The biological bacterial fertilizer and the granular organic fertilizer which are produced by the invention are used in lands of various areas, the yield is improved by 15 to 20 percent; and the fertilizer for improving the saline and alkaline lands has extremely obvious saline and alkaline transformation effect.

Description

technical field [0001] The invention relates to a treatment method of industrial sludge (waste) and a method for making biological fertilizer, organic fertilizer and improved alkalized land fertilizer after treatment. Background technique [0002] Industrial sludge (waste) generally has the following five types: (1) sludge after treatment of waste liquid from brewery; (2) sludge after treatment of waste liquid from pharmaceutical factory; (3) sludge after treatment of waste liquid from feed additive factory Sludge; (4) Sludge from sewage treatment plants; (5) Desulfurized gypsum from coal-fired power plants. For the first four kinds of sludge mentioned above, the manufacturers generally use deep burial methods to treat them. This treatment method has the following disadvantages: first, it is easy to cause secondary pollution to the environment, especially to groundwater; second, the treatment cost is relatively high and land is occupied. Some farmers directly use the sludg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/02C02F9/04C05F11/08C05G3/00C05G3/04C05G3/80
CPCY02W10/20
Inventor 杭传义杭广志郭大威李林尉王玉凤
Owner LIAOCHENG JINTAIYANG BIOCHEM
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