Method for preparing organic fertilizer by mixed fermentation of water hyacinth and dewatered sludge

A technology of dewatering sludge and mixed fermentation, which is applied in the preparation of organic fertilizers, organic fertilizers, urea compound fertilizers, etc., can solve the problems of environmental pollution, mildew of sludge, occupation of large land resources, etc., and solve the problem of non-point source pollution. , beneficial to the restoration of the environment, and the effect of promoting water treatment

Inactive Publication Date: 2009-07-22
沃邦(江苏)生态肥业有限公司
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Problems solved by technology

[0004] In the past, the methods of covering, burying, and natural stacking retting of water hyacinth were simple, which caused secondary pollution to the environment. The rotted liquid of water hyacinth returned to the river and polluted the water body, making it difficult to use water hyacinth to absorb nitrogen in water. The effect of phosphorus on water eutrophication is reduced to zero
Sludge landfill treatment firstly takes up a lot of land

Method used

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  • Method for preparing organic fertilizer by mixed fermentation of water hyacinth and dewatered sludge

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[0031] The main raw materials are water hyacinth, dehydrated sludge, microbial agents, rice bran or peanut shells, heavy metal deactivators, etc. Specific description of the processing process according to the process flow:

[0032] After the water hyacinth is squeezed, dehydrated and crushed, it is mixed with dehydrated sludge, microbial inoculants, heavy metal deactivators, rice bran or peanut hulls for fermentation and aging (secondary fermentation), and the decomposed clinker after fermentation aging A certain amount of humic acid and urea are mixed and processed into commercial organic fertilizer.

[0033] (1) Water hyacinth dehydration

[0034] Extrusion dehydration reduces the moisture content from 95% to about 50%.

[0035] (2) Water hyacinth crushed

[0036] Due to the high water content of water hyacinth, a professional grinder must be used to avoid damage to the motor; the fineness is about 3cm, so it does not need to be too precise.

[0037] (3) Metering ingredients

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Abstract

The invention discloses a method for preparing an organic fertilizer by the mixed fermentation of hyacinth and dewatered sludge, which belongs to the environmental protection technical fields of innoxious processing and resource utilization of hyacinth and sludge. In the invention, the hyacinth is dewatered by squeezing and cracked, mixed with the dewatered sludge, microorganism microbial inoculum, heavy metal passivator, rice chaff or peanut shells for fermentation and aging, then matched with a certain quantity of humic acid and urea after the fermentation and aging to prepare a commodity organic fertilizer. The method not only solves the difficulty of subsequent innoxious processing of the hyacinth which absorbs the nitrogen and phosphor in the water for controling the eutrophication of a water body, and avoids the secondary pollution to the environment caused by the incorrect processing method of the hyacinth and sludge, but also produces the commodity organic fertilizer which meets the quality standard NY525-2002, thus obtaining a certain economic benefit and being more beneficial to the development of Chinese organic agriculture and the rehabilitation of environment, being capable of realizing the transferring of nitrogen and phosphor from the water body and urban sewage to farming lands and the recycling of nitrogen and phosphor, promoting the control on the water body and achieving several purposes with one measure.

Description

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Claims

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Application Information

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Owner 沃邦(江苏)生态肥业有限公司
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