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Production process for disposing urban sludge by utilizing attapulgite bio-fermentation technology
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A kind of attapulgite clay and technical treatment technology, which is applied in the direction of biological sludge treatment, biological organic part treatment, sludge treatment, etc., can solve the problems of low accumulation and fermentation benefits, inability to popularize, high cost, etc., to solve environmental pollution problems, The effect of avoiding secondary pollution
Inactive Publication Date: 2014-01-15
GANSU BAODI KANGTAI AGRI TECH
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Problems solved by technology
In my country, landfill is the main method of sludge disposal, with a small amount of composting and incineration. The biggest problem in sludge treatment is the high water content of "primary sludge", which is difficult and expensive to dehydrate in the later stage. Sewage treatment plants have undergone concentration and After dehydration, the moisture content of the sludge can only be reduced to 80%
Since the sludge discharged from the sewage treatment plant is basically a "fluid quality" and is rich in grease, the evaporation and infiltration of water are very slow, the natural air drying time is long, and the benefit of accumulation and fermentation is extremely low; treatment The landfill method used for sludge, due to the high water content of the sludge, is prone to deterioration and odor during transportation and landfilling. In addition, the high water content leads to high viscosity and cannot be mixed evenly with other garbage, which hinders landfilling. Bio-fermentation and degradation process of garbage
In terms of incineration, although it is rich in organic matter, the sludge with too high moisture content must be incinerated by adding coal. The cost is about 200 yuan / ton. If the supporting flue gas treatment device is not complete, it will easily cause air pollution.
Therefore, whether it is landfill, or composting and incineration, the effect is not ideal, and it cannot be widely promoted.
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Embodiment 1
[0022] A production process for treating municipal sludge using attapulgite clay bio-fermentation technology, the production process is as follows:
[0023] 1. After the sludge dewatering equipment and dehydrating agent are used for deep dehydration to a moisture content of about 60%, which meets the requirements of resource utilization of sludge, it is used as a material;
[0024] 2. In the dehydrated material, add attapulgite clay at a weight percentage of 10%, and add fly ash at a weight percentage of 15%, and then mix and stack;
[0025] 3. Transport the mixed piles into the aerobic fermentation tank, put the composite microbial agent at a weight percentage of 0.2%, and put it into the aerobic fermentation tank for fermentation; the fermentation temperature is controlled at 50°C, and the fermentation time is 5 days; timely Ventilate the materials in aerobic composting, supply oxygen in time, and use aerobic microorganisms to decompose nutrients into carbon dioxide and wate...
Embodiment 2
[0029] A production process for treating municipal sludge using attapulgite clay bio-fermentation technology, the production process is as follows:
[0030] 1. It will be deeply dehydrated through sludge dewatering equipment and dehydrating agent to a moisture content of about 70%, which meets the requirements of sludge reduction and resource utilization, and is used as a material;
[0031] 2. In the dehydrated material, add attapulgite clay at a weight percentage of 15%, and add fly ash at a weight percentage of 20%, and then mix and stack;
[0032] 3. Transport the mixed piles into the aerobic fermentation tank, put the composite microbial agent at a weight percentage of 0.5%, and put it into the aerobic fermentation tank for fermentation; the fermentation temperature is controlled at 60°C, and the fermentation time is 6 days; timely Ventilate the materials in aerobic composting, supply oxygen in time, and use aerobic microorganisms to decompose nutrients into carbon dioxide...
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Abstract
The invention relates to a production process for disposing urban sludge by utilizing an attapulgite bio-fermentation technology, which comprises the following steps of: adding 10-20% of attapulgite, 15-20% of coal ash and 0.2-0.5% of compound microbial inoculant in material of water-removed sludge according to different water contents; stacking and fermenting in a fermentation tank at the temperature of 40-70 DEG C for 5-7d; ventilating the material in aerobic composting at a right moment, supplying oxygen in time, activating intestine bacteria in fermentation, and meanwhile, carrying out biological deodorization, rotating and rolling intermediate temperature resistant and high temperature resistant mixed materials according to the temperature in a material stack at a right moment through mechanical control to do work at different stages; carrying out aeration fermentation at an after-ripening stage and dry granulation to produce granular sludge easy to dissolve; and carrying out harmless treatment on the urban sludge through aerobic fermentation by using the attapulgite and the compound microbial inoculants. The invention has the advantages of low cost of raw materials, simple production process, good effect, no secondary pollution and the like.
Description
technical field [0001] The invention belongs to the technical field of sludge disposal and treatment, and in particular relates to a production process for treating urban sludge by utilizing attapulgite clay biological fermentation technology. Background technique [0002] At present, with the rapid development of modern industry, the strengthening of national energy conservation and emission reduction, and the improvement of national environmental protection awareness, the output of various sludges such as urban sludge and industrial sludge is increasing day by day, and sludge disposal and treatment have become constraints to urban development. and urban sanitation and environmental protection. [0003] Municipal sludge is a by-product of domestic sewage sludge, industrial wastewater sludge and water supply sludge. It has the characteristics of large output, complex components and sources, and high water content (up to 99%); sludge contains a large amount of It is rich in ...
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