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Solid phase sludge joint treatment method and use

A technology of sludge treatment and combined treatment, which is applied in the direction of sludge treatment, application, energy and wastewater treatment, etc., can solve the problems of immature urban sludge treatment technology, and achieve the goal of improving nitrogen retention effect, saving cost and reducing energy consumption Effect

Inactive Publication Date: 2009-07-08
成都禾力宝生物肥料有限责任公司
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AI Technical Summary

Problems solved by technology

[0007] Due to the immaturity of municipal sludge treatment technology, my country does not have a large-scale operation of sludge harmless treatment plant

Method used

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  • Solid phase sludge joint treatment method and use
  • Solid phase sludge joint treatment method and use
  • Solid phase sludge joint treatment method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Solid phase sludge treatment test of Chengdu sewage treatment plant, related process such as figure 1 , figure 2 , image 3 shown.

[0033] Test period: from January 2006 to the end of November 2007.

[0034] Test location: Chengdu Xinfan Town Base and Mopanshan Base of Chengdu Helibao Biological Fertilizer Co., Ltd.

[0035] Test material: solid phase sludge, taken from Chengdu Sewage Treatment Plant.

[0036] Sludge takes 100t as a treatment unit and is divided into 4 treatments. The number of CK treatment is 0#, and 3 groups of parallel experiments are set up for raw sludge processing treatment, numbers: 1#, 2#, 3#.

[0037] CK treatment (0#): 2kg of fresh sludge is sampled for every 10t of raw sludge, and regulators are added in the same proportion for each treatment to ensure the consistency of test and test results. Store individually after air drying. Finally, pulverize the air-dried sludge, mix it thoroughly, and sample 1kg for inspection. The heavy metal...

Embodiment 2

[0066] The same parts as in Example 1 will not be described again, but the difference is: after starting the sludge aerobic composting treatment, the compost material is inoculated with bacterial strains to perform bioleaching heavy metal removal treatment. Send hot air into the compost to raise the temperature inside the compost and keep it at 30-35°C, pH value ≤7, oxygen concentration ≥12, leaching time 10-15 days, after the bio-leaching heavy metal removal treatment is completed, continue to sludge Aerobic composting.

Embodiment 3

[0068] The same as Example 1 will not be repeated, and the difference is: after composting starts, increase the amount of acid preparation, lower the pH value for leaching (make the pH value reach 5), keep the oxygen concentration at 10%, and leaching Time 10d, after the bioleaching heavy metal removal treatment, continue to carry out ordinary aerobic composting treatment. Heavy metals were significantly removed. The heavy metal content of treated sludge is shown in Table 5.

[0069] Table 5 Heavy metal content of treated sludge

[0070] Types of heavy metals As Cd Pb Cr Hg content(%) ≤0.0004 ≤0.0001 ≤0.0022 ≤0.0156 ≤0.0001

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Abstract

The invention discloses a method for innocent treatment of sludge by combining composting technology and biological leaching technology and application thereof. The invention provides the sludge combined treatment method aiming at the defects of high investment and large land occupation in the prior sludge innocent treatment method. The treatment method integrates the biological leaching and heavy metal removal technology and the composting technology, and simultaneously removes heavy metals, pathogenic bacteria, insect eggs, organic pollutant and the like in the sludge through combined treatment. Moreover, the treatment method makes the two types of technology mutually create favorable reaction conditions during application, saves the treatment cost, and greatly improves the innocent quality. The treated sludge has small toxic compositions and high retention rate of nutritive elements, can be continuously processed into biological organic and inorganic compound fertilizers which accord with the national standards, and is suitable to be used in green agricultural production. The method has the characteristics of simple technological process, strong practicality, low use cost and easy realization of industrialization, and is particularly suitable for the national conditions.

Description

technical field [0001] The invention relates to a method for harmless treatment of solid phase sludge, in particular to a method for harmless treatment of solid phase sludge by combining composting technology and biological leaching technology and its application. Background technique [0002] Municipal sewage sludge is the sediment produced in the sewage purification process of urban sewage treatment plants, and the production volume accounts for about 1% (weight ratio) of the sewage treatment volume. With the development of cities, the amount of urban sludge is increasing year by year. It is predicted that in 2010 my country's urban sludge production will reach 30 million tons (dewatered sludge). [0003] Sludge contains a large number of nutrients and trace elements needed by plants. After being applied to farmland, it will increase the content of soil organic matter and nitrogen, phosphorus, potassium, etc., increase soil fertility, and promote crop growth. The fertili...

Claims

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Application Information

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IPC IPC(8): C05F17/00C05F11/08
CPCY02W10/20Y02W10/37Y02W30/40
Inventor 谢国欣
Owner 成都禾力宝生物肥料有限责任公司
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