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Municipal sludge blending modifying agent and sludge semi-drying method

A municipal sludge and modifier technology, which is applied in the field of municipal sludge semi-drying, municipal sludge mixing modifier, and municipal sludge treatment products, can solve the problem of not effectively reducing the quality of treated sludge and sludge Actual use of problems such as reduced disposal efficiency, increased sludge disposal volume and disposal cost to achieve the effects of improved chemical stability, easy promotion, and low implementation cost

Active Publication Date: 2017-05-17
SICHUAN HUANAO SLUDGE DISPOSAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot effectively reduce the quality of treated sludge. On the contrary, the addition of fly ash and lime further increases the amount of sludge to be treated and its mixed materials, thus reducing the actual utilization and disposal efficiency of sludge and increasing the Subsequent sludge disposal volume and disposal cost

Method used

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  • Municipal sludge blending modifying agent and sludge semi-drying method
  • Municipal sludge blending modifying agent and sludge semi-drying method
  • Municipal sludge blending modifying agent and sludge semi-drying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A municipal sludge mixing modifier is prepared.

[0028] 1. Raw materials

[0029] Hydrogen peroxide: concentration 30%, industrial grade

[0030] Bamboo vinegar stock solution: commercially available

[0031] Lactic acid bacteria fermentation stock solution: commercially available

[0032] Complex aluminum: commercially available, industrial grade, add water to prepare a complex aluminum solution with a mass concentration of 30%.

[0033] 2. Preparation

[0034] 2.1 Preparation of component A (bamboo vinegar lactic acid mixture)

[0035] Take the bamboo vinegar stock solution and the lactic acid bacteria fermentation stock solution, and mix them evenly according to the ratio in Table 1.1. The obtained bamboo vinegar lactic acid mixture is packaged independently, and is respectively component A1, component A2 and component A3.

[0036] Table 1.1 Ratio of bamboo vinegar lactic acid mixture (unit: volume percentage)

[0037] number 1 number 2 number ...

Embodiment 2

[0044] Example 1 The use of the obtained municipal sludge mixing and modifying agent and the semi-drying of the sludge.

[0045] 1. Raw materials and equipment

[0046] Municipal sludge mixing modifier: prepared in Example 1

[0047] Municipal sludge: sludge from a sewage treatment plant in a certain city, with a moisture content of 90% to 97%

[0048] CaO: commercially available, industrial grade

[0049] Diaphragm filter press: commercially available "Jingjin" brand automatic high-pressure diaphragm filter press XMAZGF20 / 800-U.

[0050] 2. Mixing and upgrading operation of municipal sludge

[0051] Take 3 municipal sludge samples N1, N2, N3 each 5m 3 150L each of component A1 or component A2 or component A3 was added to the sludge sample, and stirred evenly for 15 minutes; 25L of component B was added respectively, and stirred evenly for 15 minutes; CaO was added to adjust the sludge to pH = 7-9; Add component C5L, stir evenly for 15 minutes, and let stand for 60 minute...

Embodiment 3

[0062] The use of the municipal sludge mixing and modifying agent obtained in Example 1, which is the same as that of Example 2, will not be repeated, and the difference lies in the amount of the municipal sludge mixing and modifying agent.

[0063] Municipal sludge mixing and upgrading operation: take 3 municipal sludge samples M1, M2, M3 each 5m 3 , add 25L each of component A1 or component A2 or component A3 to the sludge sample, and stir evenly for 15min; add 50L of component B, and stir evenly for 15min; add CaO to adjust the sludge to pH=9~11; add component C 25L, stir evenly for 15min, and let stand for 60min. After the supernatant and the flocculation sludge are clearly separated, the supernatant is removed, and the remaining sludge in the flocculation layer is the output sludge after the completion of 9 parts of mixing and upgrading respectively.

[0064] Table 3.1 Sludge samples for mixing and upgrading treatment

[0065]

[0066] Sludge filter press operation: ...

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Abstract

In allusion to the defect that in the prior art, sludge blending modifying products and methods have a poor sludge reducing effect, which ultimately causes reduction in actual sludge utilizing and disposing efficiency, the invention provides a municipal sludge blending modifying agent and a using method thereof. The municipal sludge blending modifying agent comprises a component A, a component B and a component C, wherein the component A is a mixed solution of a bamboo-vinegar stock solution and a lactic acid bacterium-fermented stock solution; the component B is a hydrogen peroxide solution with the concentration of 30%; the component C is a polyaluminum solution with the concentration of 30%. The using method of the municipal sludge blending modifying agent comprises the following steps: sequentially adding the components into sludge, stirring, adjusting the pH value, and layering to obtain the blended modified sludge. The invention further provides a sludge semi-drying method by which physical pressure filtration is performed on the blended modified sludge. The municipal sludge blending modifying agent is simple in components and good in sludge modifying effect; the using method is simple and convenient in process and easy to implement; by the sludge semi-drying method, sterilization, deodorization and deep dewatering during sludge treatment can be completed at one time, the dewatering reduction effect is obvious, and the sludge disposing efficiency can be improved.

Description

technical field [0001] The invention relates to a municipal sludge treatment product and method, in particular to a municipal sludge mixing and modifying agent and its use method, and a municipal sludge semi-drying method, belonging to the fields of environmental chemical engineering and sludge disposal . Background technique [0002] Municipal sludge is the product of sewage treatment, mainly from the primary sedimentation tank, secondary sedimentation tank, gravity concentration tank and other process links of the sewage treatment process. With the continuous improvement of my country's urban sewage treatment rate, the sludge output of urban sewage treatment plants has also increased sharply. According to incomplete statistics, at present, only a small part of the sludge from urban sewage treatment plants in the country is used for sanitary landfill, land use, incineration and building material utilization, while most of it has not been treated and disposed of in a standa...

Claims

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Application Information

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IPC IPC(8): C02F11/14C02F11/12C02F11/00F23G7/00
CPCC02F11/00C02F11/004C02F11/122C02F11/14C02F2303/02C02F2303/04C02F2303/06F23G7/001F23G2201/10F23G2201/20F23G2209/12
Inventor 王勇谢国欣
Owner SICHUAN HUANAO SLUDGE DISPOSAL TECH CO LTD
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