CN113461286A - Compound enzyme for degrading sludge, preparation method and sludge degradation method - Google Patents
Compound enzyme for degrading sludge, preparation method and sludge degradation method Download PDFInfo
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- CN113461286A CN113461286A CN202110879178.8A CN202110879178A CN113461286A CN 113461286 A CN113461286 A CN 113461286A CN 202110879178 A CN202110879178 A CN 202110879178A CN 113461286 A CN113461286 A CN 113461286A
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- 239000010802 sludge Substances 0.000 title claims abstract description 104
- 102000004190 Enzymes Human genes 0.000 title claims abstract description 88
- 108090000790 Enzymes Proteins 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000000593 degrading effect Effects 0.000 title claims abstract description 20
- 150000001875 compounds Chemical class 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 230000015556 catabolic process Effects 0.000 title abstract description 14
- 238000006731 degradation reaction Methods 0.000 title abstract description 14
- 229940088598 enzyme Drugs 0.000 claims abstract description 87
- 108010059892 Cellulase Proteins 0.000 claims abstract description 16
- 102000004882 Lipase Human genes 0.000 claims abstract description 16
- 108090001060 Lipase Proteins 0.000 claims abstract description 16
- 239000004367 Lipase Substances 0.000 claims abstract description 16
- 229940106157 cellulase Drugs 0.000 claims abstract description 16
- 235000019421 lipase Nutrition 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004382 Amylase Substances 0.000 claims abstract description 14
- 108010065511 Amylases Proteins 0.000 claims abstract description 14
- 102000013142 Amylases Human genes 0.000 claims abstract description 14
- 108090000145 Bacillolysin Proteins 0.000 claims abstract description 14
- 108091005658 Basic proteases Proteins 0.000 claims abstract description 14
- 102000035092 Neutral proteases Human genes 0.000 claims abstract description 14
- 108091005507 Neutral proteases Proteins 0.000 claims abstract description 14
- 239000004365 Protease Substances 0.000 claims abstract description 14
- 235000019418 amylase Nutrition 0.000 claims abstract description 14
- 108090000526 Papain Proteins 0.000 claims abstract description 12
- 235000019834 papain Nutrition 0.000 claims abstract description 12
- 229940055729 papain Drugs 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000010865 sewage Substances 0.000 claims abstract description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 4
- 239000012153 distilled water Substances 0.000 claims abstract description 3
- 239000002131 composite material Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 230000018044 dehydration Effects 0.000 abstract description 4
- 238000006297 dehydration reaction Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000006555 catalytic reaction Methods 0.000 description 4
- 238000000855 fermentation Methods 0.000 description 4
- 230000004151 fermentation Effects 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 108091005508 Acid proteases Proteins 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 102000035195 Peptidases Human genes 0.000 description 2
- 108091005804 Peptidases Proteins 0.000 description 2
- 108010059820 Polygalacturonase Proteins 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 238000010170 biological method Methods 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 108010093305 exopolygalacturonase Proteins 0.000 description 2
- 239000003925 fat Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 235000019419 proteases Nutrition 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000006911 enzymatic reaction Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Enzymes And Modification Thereof (AREA)
Abstract
The invention discloses a complex enzyme for degrading sludge, which 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 steps of fully mixing the single enzymes according to a proportion, uniformly dissolving the mixture in distilled water at 30-40 ℃ and the mass volume of which is 2-10 times that of the compound enzyme, and adding a certain amount of polyaluminium chloride. The invention also discloses a sludge degradation method, which comprises the steps of adding a complex enzyme solution according to 1-5% of the mass of the sludge after concentration and dehydration, and carrying out enzymolysis for 8-24h at the temperature of 10-40 ℃. The complex enzyme has good degradation effect on sludge discharged by a sewage treatment plant, is simple to operate, has strong adaptability and is easy to control, the treatment cost is saved, and the treatment efficiency is improved. Meanwhile, the predicament of river sludge disposal is relieved to a certain extent, and the method is a high-efficiency environment-friendly green treatment technology.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a complex enzyme for degrading sludge, a preparation method and a sludge degradation method.
Background
The currently common sludge treatment methods mainly comprise landfill, incineration, fermentation and biological treatment. However, the methods have the defects and disadvantages of resource waste, large energy consumption, odor and dust generation, long fermentation and treatment period, high requirement on treatment conditions, secondary pollution and the like.
At present, for the treatment of sludge in small-sized river channels, an artificial dredging method is mainly adopted, and the approach of exogenous pollution is basically and effectively controlled. However, the method has low efficiency and high cost, and the attention degree on water body treatment is far higher than that of river sludge, so that the excessive river sludge is converted into endogenous pollutants, and the risk of secondary pollution exists. In recent years, economic and environment-friendly biological methods gradually become hot spots, but the biological methods also have a plurality of defects, such as more investment in the early stage, more complex work, stricter requirements on the growth environment of flora, longer treatment period and the like, and limit the development of biological treatment.
Compared with the method, the method has the advantages that the sludge is hydrolyzed by adding the enzyme, the treatment period can be shortened, the treatment efficiency is greatly improved, the selectivity of the enzyme is high, the operation and the control are easy, and the product after enzymolysis is harmless to the environment. Therefore, the method for treating the sludge by the enzyme method is also considered to be an efficient and environment-friendly green treatment technology and has wide application prospect.
Disclosure of Invention
Aiming at the technical problems, the invention provides a complex enzyme for degrading sludge, a preparation method and a sludge degradation method. After the sludge is treated, harmless and reduction treatment is realized.
In order to realize the problems, the technical scheme adopted by the invention is as follows: a composite enzyme for degrading sludge is prepared from river sludge, protein, starch, fat and cellulose through proportionally mixing protease, amylase, lipase and cellulase. The composite enzyme comprises the following components in percentage by mass: 15-40% of alkaline protease, 8-20% of neutral protease, 4-20% of papain, 4-20% of amylase, 15-40% of lipase and 4-20% of cellulase.
The compound enzyme for degrading the sludge is used for treating the degraded sludge by utilizing the biological catalysis of the compound enzyme, and organic matters in the sludge are rapidly degraded in a targeted manner through the enzymolysis catalysis, so that the stink generated by long-time fermentation of the sludge is avoided; meanwhile, the high-concentration enzyme catalysis reaction is rapid, the degradation time can be greatly shortened, and the treatment efficiency is improved.
The invention also discloses a preparation method of the compound enzyme for degrading sludge, which comprises the following steps:
1) fully mixing the single enzymes according to a proportion, and dissolving the mixture in distilled water at 30-40 ℃ with the mass volume 2-10 times that of the complex enzyme;
2) placing the complex enzyme solution in an oscillating water bath at 30-40 deg.C, and uniformly oscillating for 30-60 min;
3) PAC (polyaluminium chloride) is added according to the mass of 5-20% of the complex enzyme, and the mixture is kept fully stirred in a shaking water bath kettle.
The invention also discloses a specific method for treating sludge by using the composite enzyme for degrading sludge, which comprises the following steps:
1) concentrating and dehydrating the sludge to enable the water content of the sludge to be 60-80%;
2) adding a complex enzyme solution according to 1-5% of the mass of the sludge, and uniformly mixing and stirring;
3) controlling the reaction temperature of the complex enzyme at 10-40 ℃, and carrying out enzymolysis reaction for 8-24 h.
Further, during the sludge treatment process, the PAC is added while the complex enzyme is added, and the adding amount is 5-20% of the mass of the complex enzyme. After PAC is added, when the composite enzyme biologically catalyzes and degrades sludge, heavy metal ions decomposed from the sludge are adsorbed through a certain adsorption and flocculation effect, and meanwhile, the degraded sludge small particles are flocculated and precipitated, so that mud-water separation is realized, the volume of the sludge is reduced, and the purpose of sludge reduction is achieved.
The invention has the following beneficial effects: the complex enzyme has good degradation effect on sludge discharged by a sewage treatment plant. The method has the advantages of simple operation, strong adaptability and easy control, not only saves treatment cost and improves treatment efficiency, but also relieves the difficulty of river sludge treatment to a certain extent, and is a high-efficiency environment-friendly green treatment technology. The main advantages of using the biological compound enzyme to degrade the sludge are as follows:
1) the treatment effect is obvious, each single enzyme in the compound enzyme has enzyme catalysis specificity, and can specifically degrade organic matters, so that the degradation effect is ensured; the method not only can treat the excess sludge of a sewage treatment plant, but also can be used for treating the sludge in the river channel.
2) The treatment time is short, the efficiency is high, the treatment cycle of the common sludge fermentation method is generally 7-28 days, the cycle of using flora to treat sludge is generally 3-7 days, and the cycle of degrading sludge by the compound enzyme is 8-24h, so that the treatment efficiency of sludge is greatly improved, and the subsequent production is not influenced.
3) The method has the advantages of simple operation and low operation cost, only needs to add the prepared complex enzyme solution in the sludge treatment process, does not need other operations, can directly utilize the existing sludge tank for treatment, and saves the labor and material cost.
4) The composite enzyme degrades organic matters in the sludge, products mainly comprise carbon dioxide and water, and no secondary pollution is caused to the environment.
Drawings
FIG. 1 shows the results of the enzyme hydrolysis time validation of the complex enzyme in example 2 of the present invention.
FIG. 2 is a comparison graph of the effect of the complex enzyme in river sludge degradation in example 5 of the present invention.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following embodiments and accompanying drawings.
The organic matter components of the river sludge are complex, mainly comprise protein, starch, fat, cellulose and the like, and protease, amylase, lipase and cellulase are selected for compounding to form the complex enzyme. The composite enzyme for degrading sludge of the embodiment comprises the following components in percentage by mass: 15-40% of alkaline protease, 8-20% of neutral protease, 4-20% of papain, 4-20% of amylase, 15-40% of lipase and 4-20% of cellulase.
Since PAC can precipitate and harden after standing for a long time, the complex enzyme needs to be prepared at present.
The specific method for treating the sludge by using the complex enzyme for degrading the sludge comprises the following steps:
1) concentrating and dehydrating the sludge to enable the water content of the sludge to be 60-80%;
2) adding a complex enzyme solution according to 1-5% of the mass of the sludge, and uniformly mixing and stirring;
3) controlling the reaction temperature of the complex enzyme at 10-40 ℃, and carrying out enzymolysis reaction for 8-24 h.
Example 1: the embodiment discloses a complex enzyme for degrading sludge, which consists of alkaline protease, neutral protease, papain, amylase, lipase and cellulase.
Taking 10kg of sludge after concentration and dehydration, adding 0.5kg of complex enzyme solution, mixing and stirring uniformly, wherein the complex enzyme consists of alkaline protease, neutral protease, papain, amylase, lipase and cellulase, and the proportion of each component is as follows: 30% of alkaline protease, 16% of neutral protease, 8% of papain, 8% of amylase, 30% of lipase and 8% of cellulase, adding 5% -20% of PAC, and performing enzymolysis reaction for 12 hours at normal temperature.
Under the same conditions, the components of the complex enzyme solution are changed into alkaline protease, neutral protease, acid protease, amylase, lipase and cellulase, and the proportion of each component is as follows: 30% of alkaline protease, 16% of neutral protease, 8% of acid protease, 8% of amylase, 30% of lipase and 8% of cellulase, adding 5% -20% of PAC, and performing enzymolysis reaction for 12 hours at normal temperature.
Under the same condition, the components of the complex enzyme solution are changed into alkaline protease, neutral protease, papain, pectinase, lipase and cellulase, and the proportion of each component is as follows: 30% of alkaline protease, 16% of neutral protease, 8% of papain, 8% of pectinase, 30% of lipase and 8% of cellulase, adding 5% -20% of PAC, and performing enzymolysis reaction for 12h at normal temperature.
According to the three groups of experimental results, after the composite enzyme treatment, the VSS removal rates of the sludge respectively reach 52.59%, 47.46% and 49.72%, so that the composite enzyme for degrading the sludge disclosed by the embodiment has a better effect.
Example 2: the enzymatic reaction is a rapid hydrolysis process. The compound enzyme is used for verifying the hydrolysis efficiency of the compound enzyme within 24h, and meanwhile, a control group without the compound enzyme is made.
As shown in figure 1, 10kg of the sludge after concentration and dehydration is added with 0.5kg of complex enzyme solution and mixed and stirred uniformly, after the complex enzyme is added, the enzymolysis reaction is carried out for 8 hours, and the VSS removal rate of the sludge rapidly reaches 52.59 percent which is 6.6 times of that of a control group which is 7.97 percent. The VSS removal rate of the sludge is obviously higher than that of a control group without adding the compound enzyme. Then, the VSS removal rate of the sludge is kept stable as the reaction time is prolonged. The enzymolysis time is selected from 8-24h by combining the time cost and the degradation effect.
Example 3: after the compound enzyme consisting of various pure enzymes is used for action, VSS in the sludge is obviously removed, but the sludge is gradually degraded into finer particles along with the progress of enzymolysis reaction, so that the sludge is not easy to collect and treat. When the sludge is further dewatered, the small particles are easy to flow away with the filtrate, so that secondary pollution is caused; meanwhile, when the sludge is degraded, heavy metal ions wrapped in the sludge can be released. Therefore, a small amount of PAC is added into the complex enzyme solution, so that on one hand, the released heavy metal ions can be absorbed and gathered through adsorption, and on the other hand, fine particles and heavy metal ions generated after sludge degradation can be precipitated through flocculation.
10kg of sludge after concentration and dehydration is added into 0.5kg of composite enzyme solution added with 5 to 20 percent of PAC, and the mixture is mixed and stirred evenly. After 8 hours of enzymolysis, the VSS removal rate of the sludge reaches over 50 percent, and meanwhile, the sludge is reduced by 15 to 20 percent.
Example 4: taking a certain Nanjing sewage treatment plant as an example, calculating the volume of a sludge pool, respectively adding 1-5% of composite enzyme solution added with PAC, fully aerating and uniformly mixing in the sludge pool, closing aeration after enzymolysis reaction for 8h, standing for 12h, then separating mud and water, discharging supernatant, and finding that the volume of the sludge is reduced by 10-15%. Because the water content of the sludge in the sludge tank is higher, the added compound enzyme is diluted to a certain extent, and the degradation effect of the compound enzyme is weakened to a certain extent. But the sludge is reduced by 10 to 15 percent through enzymolysis reaction, and the pressure of sludge treatment in the later period is relieved.
Example 5: taking Nanjing river sludge as a sample, adding 0.5kg of PAC-added complex enzyme solution into 10kg of concentrated and dehydrated river sludge, mixing and stirring uniformly, and simultaneously respectively adding single enzyme and non-enzyme control groups under the same conditions. After 8 hours of enzymolysis, the VSS removal rate of the river sludge is increased from 6.94% of the non-enzyme added amount to 47.27%, which is obviously higher than 15.77%, 15.80%, 17.95%, 13.89%, 13.95% and 18.76% of that of the river sludge which is subjected to single use of alkaline protease, neutral protease, papain, amylase, lipase and cellulase, and meanwhile, the sludge is reduced by 15% -20%. As shown in fig. 2. The compound enzyme can also play a role in sludge degradation and reduction on the river sludge.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention falls within the protection scope of the present invention.
Claims (5)
1. A complex enzyme for degrading sludge is characterized in that: the compound enzyme consists of alkaline protease, neutral protease, papain, amylase, lipase and cellulase;
the composite enzyme comprises the following components in percentage by mass: the composite enzyme comprises the following components in percentage by mass: 15-40% of alkaline protease, 8-20% of neutral protease, 4-20% of papain, 4-20% of amylase, 15-40% of lipase and 4-20% of cellulase.
2. A preparation method of complex enzyme for degrading sludge is characterized by comprising the following steps:
mixing alkaline protease, neutral protease, papain, amylase, lipase and cellulase according to the proportion of claim 1, and dissolving in 30-40 deg.C distilled water 2-10 times of the mass volume of the complex enzyme; placing the complex enzyme solution in an oscillating water bath at 30-40 deg.C, and uniformly oscillating for 30-60 min; adding polyaluminium chloride according to 5-20% of the mass of the complex enzyme, and keeping fully stirring in a vibration water bath.
3. A method for treating sludge by using complex enzyme for degrading sludge is characterized by comprising the following steps:
step 1, concentrating and dehydrating sludge to enable the water content of the sludge to be 60-80%;
step 2, adding a complex enzyme solution according to 1-5% of the mass of the sludge, and uniformly mixing and stirring;
and 3, controlling the reaction temperature of the complex enzyme at 10-40 ℃, and carrying out enzymolysis reaction for 8-24 h.
4. The method for treating sludge by using complex enzyme for degrading sludge according to claim 3, which is characterized by comprising the following steps of: in the process of treating the sludge, the composite enzyme is added, and the polyaluminium chloride is added at the same time, wherein the adding amount of the composite enzyme is 5-20% of the mass of the composite enzyme.
5. The complex enzyme for degrading sludge according to claim 1, wherein: by utilizing the specificity of the biological enzyme, the method not only can treat the excess sludge of a sewage treatment plant, but also can be used for treating the sludge in the river channel.
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| CN202110879178.8A CN113461286A (en) | 2021-08-02 | 2021-08-02 | Compound enzyme for degrading sludge, preparation method and sludge degradation method |
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| CN202110879178.8A CN113461286A (en) | 2021-08-02 | 2021-08-02 | Compound enzyme for degrading sludge, preparation method and sludge degradation method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0291665A2 (en) * | 1987-04-24 | 1988-11-23 | Röhm Gmbh | Process for improving the dehydration of biological sewage sludge |
| CN102010109A (en) * | 2010-10-29 | 2011-04-13 | 孙祥章 | Application of bio-enzyme catalysis in residual sludge treatment |
| CN108129010A (en) * | 2018-01-29 | 2018-06-08 | 福州晨翔环保工程有限公司 | A kind of solid biologic enzyme sludge dehydrating agent and preparation method thereof |
| CN108203165A (en) * | 2018-03-09 | 2018-06-26 | 福州晨翔环保工程有限公司 | A kind of complex enzyme biochemical water purification agent and preparation method thereof |
| CN111217512A (en) * | 2019-12-10 | 2020-06-02 | 合肥市东方美捷分子材料技术有限公司 | Urban anaerobic sludge deep dehydration conditioner and application thereof |
-
2021
- 2021-08-02 CN CN202110879178.8A patent/CN113461286A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0291665A2 (en) * | 1987-04-24 | 1988-11-23 | Röhm Gmbh | Process for improving the dehydration of biological sewage sludge |
| CN102010109A (en) * | 2010-10-29 | 2011-04-13 | 孙祥章 | Application of bio-enzyme catalysis in residual sludge treatment |
| CN108129010A (en) * | 2018-01-29 | 2018-06-08 | 福州晨翔环保工程有限公司 | A kind of solid biologic enzyme sludge dehydrating agent and preparation method thereof |
| CN108203165A (en) * | 2018-03-09 | 2018-06-26 | 福州晨翔环保工程有限公司 | A kind of complex enzyme biochemical water purification agent and preparation method thereof |
| CN111217512A (en) * | 2019-12-10 | 2020-06-02 | 合肥市东方美捷分子材料技术有限公司 | Urban anaerobic sludge deep dehydration conditioner and application thereof |
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