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Method and system for treating residual sludge by solar energy thermal radiation oxygen-enriched fermentation

A technology of solar thermal radiation and excess sludge, applied in solar thermal power generation, sludge treatment, biological sludge treatment, etc. The effect of shortening fermentation cycle and increasing oxygen content

Inactive Publication Date: 2011-06-15
崔维
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] The purpose of the present invention is to provide a solar thermal radiation oxygen-enriched fermentation treatment method, treatment system and treatment method for excess sludge, and to solve the technical problems of high cost and serious secondary pollution of existing urban sludge

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  • Method and system for treating residual sludge by solar energy thermal radiation oxygen-enriched fermentation
  • Method and system for treating residual sludge by solar energy thermal radiation oxygen-enriched fermentation
  • Method and system for treating residual sludge by solar energy thermal radiation oxygen-enriched fermentation

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Embodiment 1

[0049] Embodiment one, see figure 1As shown, the excess sludge produced by a certain urban sewage treatment plant has a water content of 85-88%, a pH of 7.3, and an organic matter content of more than 65%.

[0050] The solar thermal radiation oxygen-enriched fermentation treatment method for excess sludge in a sewage treatment plant is characterized in that the steps are as follows:

[0051] Step 1, mixing solid-liquid waste, livestock manure, and dry admixture in a mass ratio of 7:1:2;

[0052] Step 2, heat radiation and oxygen-enriched fermentation, transport the mixed material to the fermentation tank 1 in the solar heat radiation area, use solar panels or sunlight panels as an external heat source for fermentation, and fill the fermentation material pile 7 with oxygen The mixed gas with an amount of >40% makes the material heat up quickly for full aerobic fermentation and decomposing. During the fermentation process of the material, the material is always in an oxygen-enr...

Embodiment 2

[0057] Embodiment two, see figure 1 As shown, the water content of the undersieve produced by sorting urban domestic waste is 80 to 85%. This method of solar heat radiation and oxygen-enriched fermentation of residual sludge in sewage treatment plants is as follows:

[0058] Step 1, mixing solid-liquid waste, livestock manure, and dry admixture in a mass ratio of 8:1:1;

[0059] Step 2, thermal radiation and oxygen-enriched fermentation, transport the mixed material to the fermentation tank 1 in the solar thermal radiation area, use solar energy as the external heat source for fermentation temperature rise, and fill the fermentation material pile with oxygen content> 40% The mixed gas makes the material heat up quickly for full aerobic fermentation and decomposing. During the material fermentation process, the material is always in an oxygen-enriched state through power mechanical stirring. The fermentation temperature is 60°C and the fermentation time is 10 days until the moi...

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Abstract

The invention discloses a method and system for treating residual sludge by solar energy thermal radiation oxygen-enriched fermentation. The method comprises the following steps of: I, mixing solid wastes, liquid wastes, livestock manure and a dry admixture in the mass ratio of 8:1:1-7:1:2; II, performing thermal radiation oxygen-enriched fermentation at the fermentation temperature of between 50DEG C and 70 DEG C for 7 to 10 days until the moisture ratio of the mixture falls below 30 percent; and III, mixing and packaging. By adopting the method, thermal radiation oxygen-enriched fermentation is performed on residual sludge produced by urban sewage plants, so that power consumption in a fermentation process is lowered, fermentation period is shortened, floor area and running cost are reduced, and the problem of secondary pollution in the fermentation process of residual sludge is solved. The method is suitable for treating residual sludge such as sludge produced by urban sewage treatment plants, screen underflow produced by screening household garbage, livestock breeding manure, solid wastes of crop farming and gardens.

Description

technical field [0001] The invention belongs to the technical field of energy conservation and environmental protection, and in particular relates to a treatment method and system for urban sludge. Background technique [0002] There are many ways to dispose of urban sludge, which vary greatly depending on the situation of the country. At present, the commonly used sludge disposal methods at home and abroad include: sanitary landfill, direct land use, incineration, thermal drying and lime addition treatment , compost, etc. [0003] 1. Sanitary landfill of sludge [0004] This disposal method is simple, easy to implement, and low in cost. The sludge does not need to be highly dehydrated and has strong adaptability. However, there are some problems with sludge landfill, especially landfill leachate and gas formation. Leachate is a seriously polluted liquid. If the landfill site is improperly selected or operated, it will pollute the groundwater environment. The gas produced...

Claims

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Application Information

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IPC IPC(8): C02F11/02C05G3/00C05F17/02F24J2/00C05F17/00
CPCY02E10/40Y02P20/133Y02W10/20Y02W10/37Y02W30/40
Inventor 崔维龙祎锟
Owner 崔维
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