Method for preparing water soluble quick-acting organic fertilizer from activated sludge

A kind of activated sludge, water-soluble technology, applied in the direction of organic fertilizer, sewage/sludge fertilizer, application, etc., can solve the problems of low output, long compost fermentation cycle, difficult to do topdressing, etc., to achieve short production cycle and energy saving Effect

Inactive Publication Date: 2010-10-20
SHANGHAI MULIANG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for producing water-soluble quick-acting organic fertilizer with activated sludge, so as ...

Method used

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  • Method for preparing water soluble quick-acting organic fertilizer from activated sludge
  • Method for preparing water soluble quick-acting organic fertilizer from activated sludge

Examples

Experimental program
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Effect test

Embodiment 2

[0044] The activated sludge is combined with the sorted domestic waste organic matter, and the ratio is 1:2 according to the dry basis weight; the solid-liquid ratio is 1:8, and the pH value is controlled at 4. The catalytic hydrolysis temperature is 250°C. The pressure is 1.0Mpa, and the reaction time is 10 hours. The catalyst is manganese series manganese oxide, and the amount of catalyst added is 5 / 1000 of the dry basis weight of organic materials (activated sludge + cow dung).

[0045] After hydrolyzing the solid ammonia, enter the solid-liquid separation device, use a plate and frame filter press, the operating pressure is 2.0Mpa, the filter press time is 2 hours, the temperature is 100°C, the water content of the filter cake is 49%, and the filter cake returns to hydrolysis after crushing The tank is re-hydrolyzed.

[0046] The filtrate passes through the coarse filter, first uses sand filter, and then selects a bag filter with automatic backwashing, and the filter spe...

Embodiment 3

[0051] The combination of activated sludge and crop orange stalks is 1:2.5 on a dry basis; the solid-liquid ratio is 1:8, and the pH value is controlled at 4. The catalytic hydrolysis temperature is 250°C. The pressure is 1.0Mpa, and the reaction time is 10 hours. The catalyst is manganese series manganese oxide, and the amount of catalyst added is one thousandth of the dry basis weight of organic materials (activated sludge + cow dung).

[0052] After hydrolyzing the solid ammonia, enter the solid-liquid separation device, use a plate and frame filter press, the operating pressure is 2.0Mpa, the filter press time is 2 hours, the temperature is 100°C, the water content of the filter cake is 49%, and the filter cake returns to hydrolysis after crushing The tank is re-hydrolyzed.

[0053] The filtrate passes through the coarse filter, firstly filters it with fiber cotton, and then selects a bag filter with automatic backwashing, and the filtering speed is 5m / hour. The filter ...

Embodiment 4

[0058] Activated sludge is combined with furfural slag xylitol slag at a ratio of 1:4 on a dry basis; the rest is the same as in Example 1. Add chemical nitrogen fertilizer, phosphoric acid and potassium fertilizer to adjust to N+P 2 o 5 +K 2 O total nutrients are greater than or equal to 10%, and water-soluble organic carbon (calculated as carbon) is greater than or equal to 35%. Finally, the finished product is measured and packaged as water-soluble organic fertilizer.

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Abstract

The invention relates to a method for preparing a water soluble quick-acting organic fertilizer from activated sludge. In the method, the activated sludge is used as a main material, livestock and poultry excrement and sorted organic domestic garbage or furfural slag, xylitol slag, industrial fermentation waste residue or crop straws are used as auxiliary materials, and the main material and the auxiliary materials are subjected to chemical catalytic degradation, ammonia-fixing treatment, solid-liquid separation, membrane concentration to remove heavy metal, vacuum evaporation and concentration, and dehydration to form a closed cycle without three wastes; the prepared water soluble quick-acting organic fertilizer with high additional value can be used as a base fertilizer and an additional fertilizer. The method has the advantages of greatly reducing the using amount of the fertilizer, greatly improving nutrient utilization rate, greatly reducing pollution due to wastage of the fertilizer, improving the quality of agricultural products, optimizing soil structure, and quickly increasing soil fertility.

Description

technical field [0001] The invention relates to a method for producing organic fertilizer, in particular to a method for producing organic fertilizer by using organic solid waste, and belongs to the field of fertilizer production by comprehensive utilization of organic solid waste. Background technique [0002] The traditional method of making organic fertilizer is to use livestock and poultry manure for composting and fermentation. The fermentation time is 20-30 days, and some as long as 60 days. A large amount of greenhouse gases and malodorous gases are produced during the fermentation process, leading to parasitic mosquitoes and flies, and poor environmental sanitation. During the fermentation process, organic nutritional sugars and organic acids are converted into greenhouse gases and lost. Fermented compost leaves only fairly stabilized humic acids that cannot be broken down any further. Its role can only be used as base fertilizer to improve soil structure, and play...

Claims

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Application Information

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IPC IPC(8): C05F15/00C05F7/00
CPCY02A40/20
Inventor 宋荟刘文治刘勇
Owner SHANGHAI MULIANG IND CO LTD
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