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 syste

Method used

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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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Example Embodiment

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

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

[0051] Step 1: Mix solid-liquid waste, livestock and poultry farming manure, and dry admixture at a mass ratio of 7:1:2;

[0052] Step two, heat radiation and oxygen-enriched fermentation, transport the mixture to the fermenter 1 in the solar thermal radiation area, use solar panels or sunlight panels as an external heat source for the fermentation to heat up, and fill the fermented material pile 7 with oxygen Quantity> 40% of the mixed gas makes the material quickly heat up for full aerobic fermentation and decomposing. During the fermentation of the material, the material is always in an oxygen-rich st...

Example Embodiment

[0057] Example two, see figure 1 It is shown that the water content of the sieve produced by the treatment of urban domestic garbage after sorting is 80-85%. The solar thermal radiation oxygen-enriched fermentation treatment method for the remaining sludge of the sewage treatment plant is as follows:

[0058] Step 1: Mix solid-liquid waste, livestock and poultry farming manure, and dry admixture at a mass ratio of 8:1:1;

[0059] Step two, heat radiation and oxygen-enriched fermentation, transport the mixture to the fermenter 1 in the solar heat radiation area, use solar energy as an external heat source for the fermentation to heat up, and fill the fermented material pile with oxygen content> 40% of the mixed gas makes the material quickly heat up for full aerobic fermentation and decomposing. During the fermentation of the material, the material is always in an oxygen-rich state through dynamic mechanical stirring. The fermentation temperature is 60°C, and the fermentation time is ...

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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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