Papermaking sludge organic fertilizer and aerobic composting method thereof

Abstract

The invention discloses a papermaking sludge organic fertilizer which is characterized by being prepared from the following components in parts by weight: 100 to 150 parts of papermaking sludge, 60 to 120 parts of 20 to 40-mesh straw crushed aggregates, 40 to 120 parts of 20 to 40-mesh corncob crushed aggregates, 20 to 80 parts of kitchen waste, 2 to 5 parts of bacillus subtilis, 2 to 5 parts of trichoderma, 2 to 5 parts of bacillus licheniformis and 2 to 5 parts of EM bacterial liquid. The invention also provides an aerobic composting method of the papermaking sludge organic fertilizer. According to the method, secondary pollution of papermaking waste to the environment can be solved, the obtained organic fertilizer can provide fertilizer nutrients for crops, the cost is low, operation is easy, and good environmental and economic benefits are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of organic fertilizer preparation, in particular to papermaking sludge organic fertilizer and an aerobic composting method thereof. Background Art

[0002] Organic fertilizers are rich in macronutrients and trace elements necessary for plant growth. They are rich in organic nutrients, which can not only provide nutrients needed for crop growth and improve soil, but also improve crop quality and maintain soil fertility. The development and large-scale application of organic fertilizers have greatly increased crop yields and made great contributions to ensuring global food production security.

[0003] Composting is one of the main ways to make agricultural waste harmless, reduce its volume and recycle it. The composting fermentation process is a complex process of a series of microbial activities, including the mineralization and humification of compost. The existing aerobic fermentation process for composting agricultural waste requires ventilation, among which the specific ventilation methods are mainly turning ventilation and static forced ventilation. Forced ventilation can shorten the fermentation time and improve efficiency.

[0004] In recent years, my country's papermaking industry has developed greatly, and the output and consumption of paper are among the highest in the world. The increase in the output of the papermaking industry has led to a rapid increase in the number of pollutants in the production process, among which papermaking sludge is one of the main secondary pollutants in the papermaking industry. Papermaking sludge is a solid waste. It contains a large amount of cellulose organic matter and rich plant nutrients such as nitrogen, phosphorus, and potassium. It is a high-quality resource that can be developed and utilized. However, due to the limitations of technology, funds and other conditions, the disposal of papermaking sludge is still the following methods: stacking, landfilling and incineration. The stacking method will pollute the environment, spread pathogens and cause nutrient loss; the landfill method will not only cause large-scale land pollution and nutrient loss, but also increase the burden on enterprises. The incineration method is not only immature in technology, but also has a very high processing cost.

[0005] Therefore, if papermaking sludge can be composted, it can not only realize the resource utilization of papermaking sludge, but also obtain high-efficiency organic fertilizer. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a papermaking sludge organic fertilizer and an aerobic composting method thereof, aiming to solve the problem that papermaking industrial waste is difficult to handle, and landfilling and incineration will cause great pollution to the environment.

[0007] In order to achieve the above-mentioned object of the invention, the present invention provides the following solution.

[0008] A papermaking sludge organic fertilizer, wherein the weight proportions of the components in the raw materials are: 100-150 parts of papermaking sludge, 60-120 parts of 20-40 mesh straw fragments, 40-120 parts of 20-40 mesh corncob fragments, 20-80 parts of kitchen waste, 2-5 parts of Bacillus subtilis, 2-5 parts of Trichoderma, 2-5 parts of Bacillus licheniformis and 2-5 parts of EM bacterial liquid.

[0009] Preferably, the papermaking sludge is the lower precipitate obtained by centrifuging and flocculating papermaking red liquor and removing the supernatant.

[0010] The present invention also provides an aerobic composting method for papermaking sludge organic fertilizer, which specifically comprises the following steps:

[0011] Step 1, papermaking sludge, straw scraps, corn cob scraps, and kitchen waste are mixed evenly, and then Bacillus subtilis, Bacillus licheniformis, Trichoderma and EM bacterial solution are added and mixed evenly, and then appropriate amounts of water and urea are added to adjust the water content and carbon-nitrogen ratio to obtain a mixed material;

[0012] Step 2, the mixed materials are piled up, the initial temperature of the pile is 15-20°C, the height of the pile is 0.6-1.2m, the length of the pile is 2m, the width is 1m, and covered with black mulch film;

[0013] Step 3: When the pile temperature rises to 45°C, start blowing air at a volume of 0.2-0.4m 3 / (m 3 ·min), blow air once every 8 hours for 30 minutes each time, turn the pile and add water every 10 days; control the composting temperature and time until the materials are mature.

[0014] Preferably, in step 1, the moisture content of the mixed material is 55-65%.

[0015] Preferably, in step 1, the carbon-nitrogen ratio is 20-35:1.

[0016] Preferably, in step 3, the compost temperature is controlled at 45-50° C. by turning the compost; and the composting time is 6-7 days.

[0017] The present invention makes full use of nitrogen, phosphorus and potassium elements in papermaking sludge by aerobic composting and fermentation, matures it into decomposed material, and then processes it into easy-to-use organic fertilizer for agricultural use. Through the preferred fermentation process, conditioner, composting method and ventilation volume, fertilizer for crop growth can be obtained through aerobic fermentation. The present invention can solve the pollution of papermaking waste to the environment and has good environmental and economic benefits. DETAILED DESCRIPTION

[0018] The present invention is further described in conjunction with the following examples, but the protection scope of the present invention is not limited thereto.

[0019] Example 1

[0020] An aerobic composting method for papermaking sludge organic fertilizer specifically comprises the following steps:

[0021] Step 1, 100 parts of papermaking sludge, 60 parts of 20-mesh straw fragments, 40 parts of 20-mesh corn cob fragments, and 20 parts of kitchen waste are mixed evenly, 2 parts of Bacillus subtilis, 2 parts of licheniformis, 2 parts of Trichoderma, and 2 parts of EM bacterial liquid are added, and appropriate amounts of water and urea are added to adjust the water content and carbon-nitrogen ratio so that the carbon-nitrogen ratio of the mixed material is 35:1 and the water content is 60%, thereby obtaining a mixed material;

[0022] Step 2, pile up the mixed materials to a height of 0.8m and cover with black mulch film;

[0023] Step 3: When the pile temperature rises to 45°C, start blowing air at a volume of 0.25m 3 / (m 3 ·min), blow air once every 8 hours for 30 minutes each time, turn the pile and add water every 10 days; control the composting temperature and time at 50℃ and 6-7 days respectively, until the materials are mature.

[0024] Example 2

[0025] An aerobic composting method for papermaking sludge organic fertilizer specifically comprises the following steps:

[0026] Step 1, 130 parts of papermaking sludge, 100 parts of 30-mesh straw fragments, 100 parts of 30-mesh corn cob fragments, and 60 parts of kitchen waste are mixed evenly, 3 parts of Bacillus subtilis, 3 parts of licheniformis, 3 parts of Trichoderma, and 3 parts of EM bacterial liquid are added, and appropriate amounts of water and urea are added to the mixed fragments, and the water content and carbon-nitrogen ratio are adjusted so that the carbon-nitrogen ratio of the mixed material is 30:1 and the water content is 65%, thereby obtaining a mixed material;

[0027] Step 2: The mixed materials are piled up to a height of 0.8 m and covered with black mulch film;

[0028] Step 3: When the pile temperature rises to 50°C, start blowing air at a volume of 0.3m 3 / (m 3 ·min), blow air once every 8 hours for 30 minutes each time, turn the pile and add water every 10 days; control the composting temperature and time at 50℃ and 6-7 days respectively, until the materials are mature.

[0029] Example 3

[0030] An aerobic composting method for papermaking sludge organic fertilizer specifically comprises the following steps:

[0031] Step 1, 150 parts of papermaking sludge, 120 parts of 40-mesh straw fragments, 120 parts of 40-mesh corn cob fragments, and 80 parts of kitchen waste are evenly mixed, 5 parts of Bacillus subtilis, 5 parts of licheniformis, 5 parts of Trichoderma, and 5 parts of EM bacterial liquid are added, and appropriate amounts of water and urea are added to the mixed fragments, and the water content and carbon-nitrogen ratio are adjusted so that the carbon-nitrogen ratio of the mixed material is 25:1 and the water content is 55%, thereby obtaining a mixed material;

[0032] Step 2: The mixed materials are piled up to a height of 0.8 m and covered with black mulch film;

[0033] Step 3: When the pile temperature rises to 60°C, start blowing air at a volume of 0.3m 3 / (m 3 ·min), blow air once every 8 hours for 30 minutes each time, turn the pile and add water every 10 days; control the composting temperature and time at 50℃ and 6-7 days respectively, until the materials are mature.

[0034] Comparative Example 1

[0035] Compared with Example 1, the only difference is that Bacillus subtilis is not included.

[0036] Comparative Example 2

[0037] Compared with Example 1, the only difference is that: Trichoderma is not included.

[0038] Comparative Example 3

[0039] Compared with Example 1, the only difference is that Bacillus licheniformis is not contained.

[0040] Comparative Example 4

[0041] Compared with Example 1, the only difference is that EM bacterial liquid is not included.

[0042] Implementation Effect

[0043] Table 1 Comparison of the effects of organic fertilizer implementation.

[0044]

[0045] As can be seen from the above, compared with the comparative example, in the embodiment of the present invention, the organic matter content and total nutrients are greatly improved, and the seed germination rate is greatly improved. In addition, the cost operation process of the organic fertilizer manufactured according to the present invention is simple, the temperature is above 50°C for 7 days during the composting process, and the material after fermentation is reddish brown, light and odorless, and the pellets are loose and do not attract mosquitoes and flies.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A papermaking sludge organic fertilizer, characterized in that: The mass proportions of the components in the raw materials are: 100-150 parts of papermaking sludge, 60-120 parts of 20-40 mesh straw fragments, 40-120 parts of 20-40 mesh corn cob fragments, 20-80 parts of kitchen waste, 2-5 parts of Bacillus subtilis, 2-5 parts of Trichoderma, 2-5 parts of Bacillus licheniformis and 2-5 parts of EM bacterial liquid.

2. A papermaking sludge organic fertilizer as claimed in claim 1, characterized in that, The papermaking sludge is the lower precipitate obtained by centrifuging and flocculating papermaking red liquor and removing the supernatant.

3. A method for aerobic composting of papermaking sludge organic fertilizer as claimed in any one of claims 1 or 2, characterized in that: The specific steps include: Step 1, grinding papermaking sludge, straw scraps and corn cob scraps to a specific mesh size, mixing kitchen waste evenly, then adding Bacillus subtilis, Bacillus licheniformis, Trichoderma and EM bacterial solution and mixing evenly, and then adding appropriate amounts of water and urea to adjust the water content and carbon-nitrogen ratio to obtain a mixed material; Step 2, the mixed materials are piled up, the initial temperature of the pile is 15-20°C, the height of the pile is 0.6-1.2m, and covered with black mulch film; Step 3: When the pile temperature rises to 45°C, start blowing air at a volume of 0.2-0.4m 3 / (m 3 ·min), blow air once every 8 hours for 30 minutes each time, turn the pile and add water every 10 days; control the composting temperature and time until the materials are mature.

4. A method for aerobic composting of papermaking sludge organic fertilizer as claimed in claim 3, characterized in that: In step 1, the moisture content of the mixed material is 55-65%.

5. The aerobic composting method of papermaking sludge organic fertilizer as claimed in claim 3, characterized in that: In the step 1, the carbon-nitrogen ratio is 20-35:

1.

6. The aerobic composting method of papermaking sludge organic fertilizer as claimed in claim 3, characterized in that: In step 3, the compost temperature is controlled at 45-50° C. by turning the compost; and the composting time is 6-7 days.

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