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Method for improving sludge predation effect of limnodrilus hoffmeisteri

A waterworm and sludge technology, which is applied in sludge treatment, biological sludge treatment, etc., can solve the problems such as the poor ability of Hough waterworm to prey on sludge, and achieve the effect of enhanced effect and improved sludge reduction efficiency Effect

Inactive Publication Date: 2011-07-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of the poor ability of predating sludge of the existing hydrosinus hof;

Method used

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  • Method for improving sludge predation effect of limnodrilus hoffmeisteri
  • Method for improving sludge predation effect of limnodrilus hoffmeisteri

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specific Embodiment approach 1

[0008] Specific embodiments one: the present embodiment improves the method for the predation effect of water worms Hoffe to realize by the following steps: one, domestication of water worms: laying worms on the domestication pool of flat bottom, and then Inject water to make the water depth reach 0.15-0.20m, add sludge to the domestication tank every day to maintain a constant sludge concentration in the domestication tank, and perform microporous aeration treatment on the surface of the domestication tank to make the dissolved oxygen in the sludge mixture in the domestication tank 4.0~5.0mg / L; 2. Optimizing the predation reaction conditions of Hoffe worms: the domesticated Hoffe worms were treated with sludge predation under the conditions of water temperature 25°C, pH value 6.5, and intermittent aeration , Hof worm predation effect on sludge is improved; wherein the density of Hough worm in the step one is to add the Hough worm with a wet weight of 2000g per square meter of ...

specific Embodiment approach 2

[0009] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the dissolved oxygen in the water in the acclimation pool in step 1 is 4.2-4.8 mg / L. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0010] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the dissolved oxygen in the water in the acclimation pool in Step 1 is 4.5 mg / L. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses a method for improving the sludge predation effect of limnodrilus hoffmeisteri, which relates to a method for improving the sludge predation effect of aquatic worms, and solves the problem that the prior limnodrilus hoffmeisteri has poor sludge predation capability. The method comprises the following steps of: 1, acclimatizing the limnodrilus hoffmeisteri; and 2, optimizing predation reaction conditions of the limnodrilus hoffmeisteri. The sludge reduction efficiency of mature limnodrilus hoffmeisteri affected by the method is improved by between 18 and 20 percent thanthat of mature limnodrilus hoffmeisteri which is not affected by the method; and the sludge reduction efficiency of juvenile limnodrilus hoffmeisteri affected by the method is improved by between 70 and 75 percent than that of juvenile limnodrilus hoffmeisteri which is not affected by the method.

Description

technical field [0001] The invention relates to a method for improving the effect of aquatic worms preying on sludge. Background technique [0002] At present, sewage treatment plants generally use the activated sludge process as the main process, and 40% to 60% of the sewage BOD will be converted into sludge, and its output accounts for about 0.5% to 1.0% of the total treated water volume, which is an astonishing amount. The treatment and disposal of excess sludge is the focus of the current sewage treatment field. Residual sludge is recognized as a potentially dangerous substance. It contains rich nitrogen and phosphorus nutrients, a large number of pathogenic microorganisms, parasites, concentrated heavy metals such as zinc, copper, lead and cadmium, and toxic refractory organic substances. Improper treatment will cause serious environmental problems. The existing disposal methods for excess sludge are relatively common: sludge landfill method, which has the problems of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/02
CPCY02W10/20
Inventor 田禹张晓琦祁伟
Owner HARBIN INST OF TECH
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