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Compound enzyme for degrading sludge, preparation method and sludge degradation method

A compound enzyme and sludge technology, which is applied in water/sludge/sewage treatment, biological sludge treatment, chemical instruments and methods, etc., can solve the problem that the bacterial growth environment is relatively strict, the development of biological treatment is restricted, and the treatment period is long. and other problems, to achieve the effect of saving manpower and material costs, significant processing effect, and short processing time

Pending Publication Date: 2021-10-01
江苏道科环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has low efficiency and high cost, and the emphasis on water treatment is far greater than that of river sludge, resulting in excessive river sludge being converted into endogenous pollutants, and there is a risk of secondary pollution
In recent years, the economical and environmentally friendly biological method has gradually become a hot spot, but the biological method also has many shortcomings, such as high investment in the early stage and complicated work, strict requirements for the growth environment of the flora, and a long treatment cycle, etc., which also limit biological treatment. development of

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  • Compound enzyme for degrading sludge, preparation method and sludge degradation method
  • Compound enzyme for degrading sludge, preparation method and sludge degradation method

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: This embodiment discloses a compound enzyme for degrading sludge, which consists of alkaline protease, neutral protease, papain, amylase, lipase and cellulase.

[0032] Get 10kg of concentrated and dehydrated sludge and add 0.5kg of compound enzyme solution and mix and stir evenly. The compound enzyme is composed of alkaline protease, neutral protease, papain, amylase, lipase and cellulase, and the ratio of each component is : 30% alkaline protease, 16% neutral protease, 8% papain, 8% amylase, 30% lipase, 8% cellulase, and add 5%-20% PAC, put it at room temperature for enzymatic hydrolysis Reaction 12h.

[0033] Under the same conditions, change the components of the compound enzyme solution to alkaline protease, neutral protease, acid protease, amylase, lipase and cellulase, the ratio of each component is: alkaline protease 30%, neutral protease 16%, 8% acid protease, 8% amylase, 30% lipase, 8% cellulase, and 5%-20% PAC was added, and the enzymolysis rea...

Embodiment 2

[0036] Example 2: The enzymatic hydrolysis reaction is a rapid hydrolysis process. Use the above compound enzyme to verify the hydrolysis efficiency of the compound enzyme within 24 hours, and make a control group without adding the compound enzyme.

[0037] like figure 1 As shown, take 10kg of concentrated and dehydrated sludge and add 0.5kg of compound enzyme solution and mix and stir evenly. After adding the compound enzyme, the enzymolysis reaction is carried out for 8 hours, and the VSS removal rate of the sludge reaches 52.59% rapidly, which is 7.97% of the control group. 6.6 times. The VSS removal rate of the sludge was significantly higher than that of the control group without compound enzyme. After that, with the extension of reaction time, the VSS removal rate of sludge remained stable. Combined with time cost and degradation effect, the enzymatic hydrolysis time is 8-24h.

Embodiment 3

[0038] Example 3: After the action of a compound enzyme composed of various pure enzymes, the VSS in the sludge was significantly removed, but as the enzymatic hydrolysis reaction proceeded, the sludge was gradually degraded into finer particles, which were difficult to collect and process. When the sludge is further dehydrated, these small particles are easy to flow away with the filtrate, causing secondary pollution; at the same time, when the sludge is degraded, the heavy metal ions wrapped in the sludge will also be released. Therefore, adding a small amount of PAC to the compound enzyme solution can absorb and aggregate the released heavy metal ions through adsorption on the one hand, and on the other hand can precipitate fine particles and heavy metal ions produced after sludge degradation through flocculation.

[0039] Take 10 kg of concentrated and dehydrated sludge, add 0.5 kg of compound enzyme solution with 5%-20% PAC, and mix and stir evenly. After 8 hours of enzym...

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Abstract

The invention discloses a compound enzyme for degrading sludge. The compound enzyme consists of alkaline protease, neutral protease, papain, amylase, lipase and cellulase. The invention also discloses a preparation method of the compound enzyme for degrading sludge, which comprises the following steps: fully mixing the single enzymes in proportion, uniformly dissolving in distilled water with the temperature of 30-40 DEG C and the volume of which is 2-10 times that of the mass of the compound enzyme, and adding a certain amount of polymeric aluminum chloride. The invention also discloses a sludge degradation method which comprises the following steps: adding a compound enzyme solution accounting for 1-5% of the mass of the concentrated and dehydrated sludge, and carrying out enzymolysis at 10-40 DEG C for 8-24 hours. The compound enzyme disclosed by the invention has a good degradation effect on sludge discharged by a sewage treatment plant, is simple to operate, high in adaptability and easy to control, and not only saves the treatment cost, but also improves the treatment efficiency. Meanwhile, the difficulty of river sludge treatment is relieved to a certain extent, and the method is an efficient and environment-friendly green treatment technology.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a compound enzyme for degrading sludge, a preparation method and a sludge degradation method. Background technique [0002] At present, the commonly used sludge treatment methods mainly include landfill, incineration, fermentation and biological treatment. However, these methods have many shortcomings and disadvantages, such as wasting resources, consuming a large amount of energy, generating odor and dust, long fermentation and processing cycles, high requirements on processing conditions, and causing secondary pollution. [0003] At present, the treatment of small river sludge mainly adopts the method of artificial dredging, and the way of external pollution is basically effectively controlled. However, this method has low efficiency and high cost, and the emphasis on water treatment is much higher than that of river sludge, resulting in excessive river sludge being...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02C02F101/30
CPCC02F11/02C02F2101/30C02F2103/007
Inventor 李泳洪李惠朱慧可吕天瑞贺大力
Owner 江苏道科环境科技有限公司