Sludge aerobic mechanical composting method and dynamic roller composting device
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A composting method and sludge technology, which are applied in fertilization devices, organic fertilizers, preparation of organic fertilizers, etc., can solve the problems of long composting time, secondary pollution, and poor control of composting conditions, and reduce energy consumption and cost. , the effect of low cost
Inactive Publication Date: 2010-01-06
SHENYANG NORMAL UNIV
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[0005] The present invention aims at the deficiencies in the above-mentioned prior art, such as poor control of composting conditions, long composting time, secondary pollution and difficulty in realizing
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[0030] 1) Preparation of composite conditioner for composting
[0031] Take the straw that accounts for 1%-2% of the total weight percentage of the pile, the sun-dried sludge with a weight percentage of 3%-5%, and the compost finished product that accounts for 6%-8% by weight; Sun-dried sludge and compost finished products are laid out to dry outdoors; after drying, the moisture content of straw is about 0.5%, the moisture content of sun-dried sludge is about 4.3%, and the moisture content of compost products is 28%; then crushed and mixed to make compost Composite conditioning agent for use;
[0032] 2) Stacking preparation
[0033] Take the original sludge accounting for 85%-90% of the total weight of the pile, and its water content is about 80%, then mix the original sludge with a compound conditioner for compost, and stir until the particles are uniform and the particle size is ≤ 10mm. ;
[0034] Dynamic Aerobic Mechanical Composting
[0035] Implementation steps of dy...
Embodiment
[0050] The sludge aerobic mechanical composting method is realized through two steps of composting pretreatment and dynamic aerobic mechanical composting:
[0051] specific method:
[0052] Processing before stockpiling:
[0053] Firstly, a compound conditioner for compost is prepared, and the compound conditioner is made by using a mixture of a small amount of straw, raw sludge after drying and finished compost. Before composting, spread the straw, a small amount of raw sludge and the composted sludge products outdoors to dry to control the moisture content (environment temperature 3-30°C is acceptable), and crush them for later use.
[0054] According to the suitable water content, C / N value, pH value and aeration rate required for the growth and reproduction of aerobic microorganisms, the water content and weight percentage of each component in the sludge raw material and composite conditioner are respectively:
[0055]
[0056] Take the compost raw materials according...
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Abstract
The invention provides a sludge aerobic mechanical composting method and a dynamic roller composting device, which is designed to solve the currently existing problems that the composting conditions are not easy to control and automatic and continuous operation is not easy to realize, the composting time is long, and secondary contamination is serious and the like. The invention comprises the following steps: processing by two steps of pretreatment before composting and dynamic aerobic mechanical composting; mixing the self-made composite conditioner used for composting and original sludge according to the preset weight percentage and water content and crashing; pile turning and ventilating by utilizing self-made dedicated dynamic roller composting device; collecting and recycling percolate; composting and fermenting for 7 to 8 days. In the composting process, the stockpile in the device has no phenomena like cementation or blocking and the like, ensuring that the pile temperature in the fermentation case can rise to 55 DEG C rapidly and maintain for more than 3 days, and C/N value can rise to 11.49 from 9.57, thus the invention completely achieves requirements of sludge composting. The invention has the following characteristics and beneficial effects: short composting period, good quality, no generation of secondary contamination, easy realization of automatic continuous operation, low energy consumption and lowered composting cost, thus greatly promoting the realization of harmlessness and reclamation of city sludge.
Description
technical field [0001] The invention relates to a composting method and device, in particular to a rapid aerobic mechanical composting method for sludge and a dynamic drum composting device. The invention uses the sludge produced in the urban sewage treatment process as the main raw material, and prepares the organic fertilizer through a dynamic drum composting device. It belongs to the field of environmental protection application technology. Background technique [0002] In recent years, with the acceleration of my country's economic and urbanization development process, the public's increasing requirements for environmental quality have led to an increase in the degree and scale of urban sewage treatment in my country. In the process of urban sewage treatment, urban sludge accounting for 0.02% of the sewage volume is generally produced, so the amount of urban sludge as a product of sewage treatment is bound to increase rapidly. At present, the annual output of dry sludg...
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