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A preparation process of deodorizing, sterilizing and low-pollution sludge organic compound fertilizer

A preparation process and technology of compound fertilizer, applied in the directions of sewage/sludge fertilizer, organic fertilizer, fertilization device, etc., can solve problems such as incompatibility, and achieve the effect of fast reaction speed, beneficial to land ecological fertilizer, and easy mixing.

Active Publication Date: 2018-11-09
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] The technical problem to be solved by the present invention is to provide a preparation process of deodorizing, sterilizing and low-pollution sludge organic compound fertilizer, which solves the resource utilization process of nearly qualified sludge, and solves the problems of current quick-acting fertilizer and slow-release fertilizer at the same time. , basal fertilizer, and microbial fertilizer are not integrated, which simplifies the problem of multiple fertilization and is beneficial to the ecological use of land fertilizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Big test: Take 1 ton of qualified domestic sludge from a sewage treatment plant in Quanzhou, with a water content of 87%, a large amount of polyacrylamide, slightly black and smelly, viscous and elastic, and found to be basically organic matter after burning. Use 2 sets of hoses to slowly add 25 kg of 28% industrial hydrogen peroxide (7 kg of hydrogen peroxide, that is, the amount added is 0.7% of the wet weight of domestic sludge), 0.5 kg of polyferric sulfate dissolved in water (recommended iron About 0.13 kilograms of ions, that is, the amount of addition is 0.013% of the wet weight of domestic sludge), while adding, use a small forklift to mix. At this time, the sludge is rapidly thinned into a viscous fluid state, deodorized, and the color becomes light brown. Leave it for 3 hours and pump it into a plate-and-frame filter press for pressure filtration. Simple monitoring of the squeezed water using titanium salt shows no orange color, that is, the hydrogen peroxide ...

Embodiment 2

[0058] Big test: Take 2 tons of dredging sludge from a sewer in Quanzhou, pack it in a geotextile bag, with a water content of 70%, no polyacrylamide, black stench, characterized by high sediment content, low organic content, and heavy metals exceeding the standard. Directly put into the plastic pool in situ, add 0.5 kg of polyferric chloride (about 0.2 kg of ferric ion, i.e. consumption is 0.01%) prepared solution and 40 kg of 28% industrial hydrogen peroxide (11 kg of hydrogen peroxide, 0.55%), iron catalpa and rake manual mixing, the black and odor of the dredging sludge disappeared quickly, and the sludge was thinned. After 2 hours, it was shoveled into a geotechnical bag for self-drainage, and the drainage had no odor. The mud does not deteriorate during the 7 days. According to the cost calculation, it can be accepted by the market at about 30-40 yuan / ton, which shows that it has solved the current industry problems that plague the dredging and odor. Used as earthwork. ...

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PUM

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Abstract

The invention provides a preparation technology of a deodorized, sterilized, and low-pollution sludge organic composite fertilizer. The preparation technology comprises the following steps: adding hydrogen peroxide and iron ions into sludge with a high water content, stirring, allowing the mixture to stand still for 0.1 to 6 hours, squeezing the mixture to remove water (or further drying the mixture), then adding nitric acid and hydrogen peroxide (or oxygen gas), mixing to obtain foamed thick mud (or loose mud), placing the mud in an enclosed container to carry out a nitration, decomposition and aging treatment; adding a neutralizing substance into the aged sludge, wherein the neutralizing substance is one of fly ash, boron mud, alkaline potassium, magnesium, and ammonium compound, finally drying the nitrated, decomposed, and neutralized sludge; finally directly mixing the nitrated, decomposed, neutralized, and dried sludge with particles with embedded fermenting bacteria to obtain the finished product of sludge organic composite fertilizer. The provided technology can convert nearly-qualified sludge into valuable resources. Moreover, the fertilizer solves the problem that at present, the fast-released fertilizer, sustain-released fertilizer, base fertilizer, and microbial fertilizer are not integrated, and fertilizing should be performed for many times. The provided fertilizer is beneficial for the ecological fertilization of soil.

Description

【Technical field】 [0001] The invention relates to a preparation process of deodorizing, sterilizing and low-pollution sludge organic compound fertilizer. 【Background technique】 [0002] Sludges from sewage plants, reservoir dredging, etc., if the heavy metals and organic chlorine are close to the standard, can usually be used to make organic fertilizers for recycling. At present, the main recycling methods are: aerobic composting and anaerobic fermentation. . At present, aerobic composting is a high-pollution treatment technology, mainly exhaust gas pollution; anaerobic fermentation equipment is extremely expensive and has poor operational reliability; in addition, the current problems of sludge organic fertilizers are: [0003] 1. Raw material stage: [0004] 1. Sludge dehydration and drying are difficult. Usually, the moisture must be controlled to a low level before sludge fermentation, but the polyacrylamide in the sludge makes it difficult to dehydrate and dry, so tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F7/00
CPCY02A40/20
Inventor 陈楷翰陈昱霖
Owner QUANZHOU NORMAL UNIV