Sludge organic fertilizer for forestry and afforestation and preparation method thereof

An organic fertilizer and sludge technology, which is applied in the formulation and preparation of organic fertilizer components for forestry afforestation, can solve the problem of in-situ fertilization technology in small and medium-sized sewage treatment plants. , long composting cycle and other issues, to achieve the effect of expanding the scope of utilization, improving composting efficiency and low production cost

Inactive Publication Date: 2012-01-04
SUBTROPICAL CROPS INST OF FUJIAN PROVINCE +1
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, one of the main ways of sludge disposal in my country is to use the strip heap process to convert sludge into fertilizer; the strip heap process has a large processing capacity, but the composting cycle is long and prone to secondary pollution
[0004] At present, domestic sludge fertilization mostly adopts centralized composting, which is more suitable for large-scale sewage treatment plants in big cities, but there are no detailed research reports on sludge fertilization technology suitable for small and medium-sized sewage treatment plants

Method used

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  • Sludge organic fertilizer for forestry and afforestation and preparation method thereof
  • Sludge organic fertilizer for forestry and afforestation and preparation method thereof
  • Sludge organic fertilizer for forestry and afforestation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment one fertilizer preparation

[0023] 1.1.1 Culture medium and composting materials: beef extract peptone medium, improved Gao’s No. 1 medium, Martin’s medium, starch hydrolysis test, gelatin hydrolysis test, and cellulase activity determination of bacteria, fungi, and actinomycetes Medium and its counting medium [20-22] . Domestic sludge comes from Xiamen Shiweitou Sewage Treatment Plant, with 59-81% moisture, 52% total carbon (dry basis), and 1.9% total nitrogen (dry basis); Leftovers are added with appropriate amount of conditioners such as tobacco leaf residue), moisture 21-29%, total carbon 30-39% (dry basis), total nitrogen 1.1% (dry basis). The ratio of sludge and mushroom soil is 13:7 (w / w), total carbon is 41%, moisture is 60%, C / N value is 27-33, and it is used as compost raw material.

[0024] 1.1.2 Instruments and equipment: WDP microbial multi-purpose incubator, intelligent light incubator, bacteria counter, colony counter and plastic tray, etc....

Embodiment 2

[0037] A sludge fermentation method, comprising the following steps:

[0038] A. Adjust the sludge to a water content of 55%, a total carbon ratio of 45%, and a C / N value of 27 with the leftovers of the edible fungus culture medium;

[0039] B, the first fermentation compost: add 10% (w / w) decomposing conditioner to the sludge after adjustment, its main components of this decomposing conditioner include bean cake powder 27%, starch 72%, KH 2 PO 4 1%, adjusted to 44% moisture, pH 7.1, stirred evenly, sent to the fermentation device to build a fermentation pile, heated up, and fermented for 80 hours at a fermentation temperature of 50°C and a pH value of 10.5;

[0040] C, the second fermentation compost: add 12% (w / w) decomposing conditioner to the compost after the first fermentation, its main components include soybean cake powder 20%, starch 78.8%, KH 2 PO 4 1.2%, adjusted to 50% moisture, PH 7.6, after turning and stirring,

[0041] Under the conditions of a fermentatio...

Embodiment 3

[0044] A sludge fermentation method, comprising the following steps:

[0045] A. Adjust the sludge to a water content of 65%, a total carbon ratio of 40-44%, and a C / N value of 33 with the leftovers of the edible fungus culture medium;

[0046] B. Fermentation compost for the first time: add 8% (w / w) decomposing conditioner to the sludge after adjustment, and its main components of this decomposing conditioner include bean cake powder 31%, starch 68.2%, KH 2 PO 4 0.8%, adjusted to 46% moisture, PH7.3, stirred evenly, sent to the fermentation device to build a fermentation pile, heated up, and fermented for 60 hours at a fermentation temperature of 52°C and a pH value of 8.7;

[0047] C, the second fermentation compost: add 15% (w / w) decomposing conditioner to the compost after the first fermentation, its main components include soybean cake powder 23%, starch 76%, KH 2 PO 4 1%, adjusted to 50% moisture, pH 7.6, after turning and stirring, ferment for 80 hours at a fermenta...

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Abstract

The invention claims a sludge organic fertilizer for forestry and afforestation and a preparation method thereof. The organic fertilizer comprises 30-35% of total carbon, 1-2% of N, 2-3% of P2O5, 1-3% of K2O and 25-30% of water. The organic fertilizer is prepared by fermentation of sludge. The specific preparation method comprises the following steps of: A, regulating a water content of the sludge to 55-65%, a C / N value to 27-33, and a content of the total carbon to 35-45%; B, fermenting and composting for the first time for 65-75 hours at a temperature in a range of 50-52 DEG C and a pH value of 7-11; and C, fermenting and composting for the second time for 55-75 h at a temperature in a range of 53-55 DEG C and the pH value of 7-9. According to the invention, the organic fertilizer is prepared by two-step aerobic composting to shorten an aging time of a traditional windrow sludge composting method from 30-40 days to 110-160 hours. Compared with the traditional method, the method provided by the invention is characterized by lower fermentation temperature (but not lower than 50 DEG C), low production energy consumption caused by high water content of the organic fertilizer and low production cost. The method is used for fertilization production on the aspect of afforestation. The sewage sludge fertilizer is used for increasing organic matter of soil, is good for growth of forest vegetation, and embodies a theory of forest ecological balance and circulation economy.

Description

technical field [0001] The invention relates to an organic fertilizer and a preparation method thereof, in particular to a composition formula and a preparation method of sludge organic fertilizer for forestry afforestation. Background technique [0002] Agricultural production advocates the use of organic fertilizers and bacterial fertilizers to increase the organic matter content of the soil and the activity of soil enzymes. Researches at home and abroad believe that the application of organic fertilizers can increase the number of soil aggregates, increase soil microbial biomass and soil enzyme activity, and increase the content of available nutrients such as nitrogen, phosphorus and potassium, so as to maintain soil fertility and sustainable high yield of crops. At present, the raw materials of commercial organic fertilizers include agricultural product waste, livestock sludge (feces), urban domestic sludge, etc. [0003] With the rapid urbanization of our country's pop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F7/00C05F17/00C05G1/00A01G1/00
CPCY02A40/20Y02W30/40
Inventor 许文江刘美龄张庆美谢小青戴兰华余淑蓉黄明强宋志瑜陈志峰谢鸿根
Owner SUBTROPICAL CROPS INST OF FUJIAN PROVINCE
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