CN111762838A - Water body algae treatment method - Google Patents
Water body algae treatment method Download PDFInfo
- Publication number
- CN111762838A CN111762838A CN202010588010.7A CN202010588010A CN111762838A CN 111762838 A CN111762838 A CN 111762838A CN 202010588010 A CN202010588010 A CN 202010588010A CN 111762838 A CN111762838 A CN 111762838A
- Authority
- CN
- China
- Prior art keywords
- sedimentation tank
- water
- algae
- adsorption material
- water body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
- C02F2101/32—Hydrocarbons, e.g. oil
- C02F2101/322—Volatile compounds, e.g. benzene
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to a method for treating algae in water, which adds a regenerative composite adsorption material into a flocculation sedimentation tank, and the preparation method of the regenerative composite adsorption material comprises the following steps: and placing the activated sludge adsorption material prepared from the residual activated sludge into a water body, adsorbing algae and pollutants thereof in the water body to obtain a precipitate, separating the precipitate, and sequentially carrying out drying treatment, carbonization treatment and steam activation treatment on the separated precipitate to obtain the regenerated composite adsorption material. The invention uses the prepared regenerative composite adsorption material to adsorb blue algae, and can prepare the regenerative composite adsorption material again from the residual sediment rich in algae, thereby not only achieving the purpose of treating algae in water body and improving water quality, but also recycling the algae in the water body to achieve virtuous cycle, and the whole process has simple operation and no pollution.
Description
Technical Field
The invention relates to the technical field of treatment of harmful substances in water, in particular to a method for treating algae in water.
Background
The organic pollution of water mainly refers to pollution caused by discharge of waste water containing a large amount of organic matters in urban sewage, food industry, paper industry and the like. At present, river and bottom mud pollution is extremely serious, and organic pollution is one of the most important pollution sources.
The pollution of the water body can not only cause the eutrophication of the water body, but also contain more harmful substances. Eutrophic water can promote large-area algae, algae such as blue algae can cause water to be anoxic when covered on the water surface, so that the biological death speed in the water is increased, and the increasingly enriched nutrient substances in the water can be immediately improved through non-control discharge.
Disclosure of Invention
The invention provides a water body algae treatment method for solving the technical problem of reducing organic matters in a water body. The method can effectively adsorb algae and water pollutants in the water body, and reduce the probability of water pollution.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme.
A method for treating algae in water body is characterized in that a regenerative composite adsorption material is added into a flocculation sedimentation tank, and the preparation method of the regenerative composite adsorption material comprises the following steps:
and placing the activated sludge adsorption material prepared from the residual activated sludge into a water body, adsorbing algae and pollutants thereof in the water body to obtain a precipitate, separating the precipitate, and sequentially carrying out drying treatment, carbonization treatment and steam activation treatment on the separated precipitate to obtain the regenerated composite adsorption material.
Preferably, the sediment contains sludge and active sludge adsorbing material which adsorbs algae and harmful substances; algae include blue algae, green algae, etc.; water body contaminants include phosphates and nitrides, etc.
Preferably, the drying treatment condition is drying at 100-200 ℃ for 60-120min, and the water content of the material after drying treatment is less than 20 wt%; the carbonization treatment condition is 600-800 ℃ anaerobic carbonization for 60-120min, and the water content of the material after carbonization treatment is less than 1 wt%.
Preferably, the process of the water vapor activation treatment is as follows: and (3) putting the material to be activated after carbonization into a reaction tube of a muffle furnace, continuously introducing protective gas into the muffle furnace, after the air in the tube is exhausted, introducing water vapor at the temperature of 700mL/min for 600-.
Preferably, the temperature rise speed of the muffle furnace is 18 ℃/min; the activation temperature is 810 ℃, and the activation time is 60 min; the cooling speed is 25 ℃/min; the flow rate of the water vapor was 600 mL/min.
Preferably, the preparation process of the active mud adsorption material is as follows: drying the residual activated sludge in a protective gas atmosphere to obtain dried sludge; thermally cracking the dried sludge in a protective gas atmosphere to obtain an active sludge adsorption material; drying the residual activated sludge at 80-200 deg.C for 10-80 min; the thermal cracking temperature is 500-800 ℃, and the time is 10-80 min.
Preferably, the method for treating algae in water body comprises the following specific steps:
s1, introducing the water body containing algae and pollutants thereof in the selected area into a water collecting tank by adopting a water channel, and lifting the sewage in the water collecting tank to a flocculation sedimentation tank;
s2, adding the prepared regenerated composite adsorption material into a flocculation sedimentation tank, returning clear liquid to a water body after the water quality in the tank is clear and the detection index is qualified, and preparing a circulating composite material from the residual sediment; the preparation method of the circulating composite material is the same as that of the regenerated composite adsorption material.
Preferably, a coarse grating and a fine grating are respectively arranged in the water channel; the gap between the coarse grids is 15-20 mm; the gap between the fine grids is 5-10 mm. The size of the water collecting pool is 2.0m multiplied by 3.5m, and the effective water depth is 3.0 m; the size of the flocculation sedimentation tank is 5.0m multiplied by 4.0m, and the effective water depth is 3.5 m.
Preferably, the flocculation sedimentation tank comprises a pre-filtration sedimentation tank and a post-filtration sedimentation tank; an adsorption filter screen for separating the pre-filtration sedimentation tank and the post-filtration sedimentation tank is arranged between the pre-filtration sedimentation tank and the post-filtration sedimentation tank; the adsorption filter screen comprises two parallel wire nets, and the regenerated composite adsorption material is tightly filled between the two wire nets; the bottoms of the pre-filtering sedimentation tank and the adsorption filter screen are provided with a sediment push-out device for horizontally pushing sediment out of the flocculation sedimentation tank; the two parallel wire nets are vertically arranged; and a throwing device for throwing the regenerated composite adsorption material is arranged at the top of the pre-filtering sedimentation tank.
Preferably, the flocculation sedimentation tank comprises a pre-filtration sedimentation tank and a post-filtration sedimentation tank; an adsorption filter screen for separating the pre-filtration sedimentation tank and the post-filtration sedimentation tank is arranged between the pre-filtration sedimentation tank and the post-filtration sedimentation tank; the adsorption filter screen comprises two parallel wire nets, and the regenerated composite adsorption material is tightly filled between the two wire nets; the bottoms of the pre-filtering sedimentation tank and the adsorption filter screen are provided with a sediment push-out device for horizontally pushing sediment out of the flocculation sedimentation tank; the two parallel wire nets are vertically arranged; and a throwing device for throwing the regenerated composite adsorption material is arranged at the top of the pre-filtering sedimentation tank. The adsorption filtration net is provided with the push pedal that the circulation was pushed down for the compound adsorption material of regeneration between two wire netting pushes down to the bottom of the pool, conveniently with the help of deposiing ejecting device will adsorb complete compound adsorption material of regeneration, the silt of sediment etc. and release the flocculation and precipitation pond from the bottom of the water pool. The top of the wire netting is provided with a front baffle and a rear baffle, the two adjacent push plates pushed down circularly are arranged at intervals, the front baffle covers the top of the pre-filtration sedimentation tank, and the rear baffle covers the top of the post-filtration sedimentation tank; when the volume of the treated water reaches a set amount, the adsorption material is considered to be completely adsorbed, the front baffle and the rear baffle are lifted from the tops of the pre-filtration sedimentation tank and the post-filtration sedimentation tank respectively and rotate to the vertical direction, and are pushed down vertically and then are attached to the outer sides of the two wire nets so as to protect the wire nets extruded by the filter-pressed materials in the push plate to be pushed down, so that the damage is caused, and the proceeding of the next adsorption cycle is influenced; the push plates move downwards, and the compact regenerative composite adsorption material is fixedly filled between every two adjacent push plates. The sediment pushing device pushes the sludge, the regenerative composite adsorption material which adsorbs the blue algae and the harmful substances out of the bottom of the tank together.
Preferably, the level of the inlet of the pre-filtration sedimentation tank is higher than the liquid level of the pre-filtration sedimentation tank; the liquid level of the sedimentation tank before filtration is higher than that of the sedimentation tank after filtration; the height of the outlet of the sedimentation tank after filtration is smaller than the liquid level of the sedimentation tank after filtration; the sediment push-out device is arranged at the bottom of the flocculation sedimentation tank.
The invention has the beneficial effects that:
(1) the regenerated composite adsorption material prepared by the invention contains more gaps after carbonization treatment, because algae such as blue algae and the like are attached to the outside of the active mud adsorption material which forms fixed pores after carbonization at a high temperature, organic matters in the sludge are partially pyrolyzed and generate combustible gas, and the rest parts are retained at the pores in a carbon form to form a barrier, so that smaller and fluffy pores are generated, and the high specific surface area of the regenerated composite adsorption material is formed by the fine and dense pores; and inorganic matters in the sludge are decomposed and rearranged to form stable minerals, and heavy metals are combined in mineral lattices and compounded with organic matters to form the porous material. Therefore, the adsorption performance of the prepared regenerative composite adsorption material is greatly improved, algae in the water body can be effectively adsorbed to sink, collect and recycle, water pollutants such as hydrogen sulfide, sulfur dioxide, nitride, Total Volatile Organic Compounds (TVOC), phosphate and the like can be effectively adsorbed, the probability of water eutrophication is greatly reduced, and the environment is protected.
(2) The regenerated composite adsorbing material prepared by the invention is prepared by drying and thermally cracking the waste residual activated sludge of a sewage treatment plant, not only is the required raw material reutilized for wastes, but also the prepared material is non-toxic and environment-friendly.
(3) The regenerated composite adsorption material prepared by the invention can be used for preparing a circulating composite material after being used, can be used for adsorption again, can be used for regenerating and circulating the prepared material after adsorption, can not only achieve the aim of treating algae in water body, improve water quality, but also recycle blue algae to achieve virtuous cycle, is simple to operate and pollution-free in the whole process, and realizes resource recycling.
(4) The water vapor activation treatment in the invention takes water vapor as an activating agent, the composite adsorption material and the water vapor are introduced into a tubular muffle furnace, the activation reaction of the material is carried out at the high temperature of 800-; and the water vapor activation process is simple and has less pollution to the environment.
(5) The content of carbon element in the regenerated composite adsorbing material is 11.4-26.6%, more than 90% of the carbon element exists in the activated carbon base, the rest exists in the carbonate, and the material also contains iron and aluminum compounds, so that the material has better adsorbability.
(6) Compared with the regenerated composite adsorption material prepared without steam activation treatment, the regenerated composite adsorption material prepared by the invention contains blue algae, activated sludge adsorption material and sludge, but because the regenerated composite adsorption material is subjected to steam activation treatment, the specific surface area, the total pore volume and the iodine value of the blue algae, the activated composite adsorption material and the activated sludge are compared, and the specific surface area is increased by 1.6 times after the steam activation treatment, which is enough to prove the importance of the steam activation treatment on the performance of the material prepared by the invention, the surface area, the total pore volume, the iodine value and the like of the material activated by the steam activation method are obviously superior to those of the material before activation, and the operation is simple and pollution-free.
(7) Compared with the active sludge adsorption material, the regenerative composite adsorption material prepared by the invention does not contain blue algae, and is not subjected to water vapor activation treatment, and compared with the active sludge adsorption material, the regenerative composite adsorption material prepared by the invention has the advantages that the specific surface area is 2.7 times higher, the iodine value is respectively 1 time higher, and the total pore volume value is increased. Therefore, under the dual effects of adding blue algae and water vapor activation treatment, the performance of the regenerated composite adsorbing material prepared by the invention is greatly improved compared with that of an active mud adsorbing material.
Drawings
FIG. 1 is a process flow diagram of the present invention.
FIG. 2 is a diagram I of the adsorption condition of the regenerated composite material of the invention on organic matters in a water body.
FIG. 3 is a diagram II of the adsorption of the regenerated composite material of the invention to organic matters in water.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
In an activated sludge system of a sewage treatment plant, activated sludge discharged from a secondary sedimentation tank outside the system is residual activated sludge, and the activated sludge is discharged sludge generated in a secondary sedimentation tank after sewage is subjected to primary sedimentation tank sedimentation, aeration tank biochemical treatment and secondary sedimentation tank sedimentation in sequence; one part of sludge generated by the secondary sedimentation tank flows back to the aeration tank to become return sludge, and the other part of sludge is discharged out of the sewage treatment system to become residual activated sludge.
Preparing an active mud adsorption material: carrying out filter pressing on the residual activated sludge, and drying in a nitrogen atmosphere to obtain dried sludge; thermally cracking the dried sludge in a nitrogen atmosphere to obtain an active sludge adsorption material; the water content of the residual activated sludge after filter pressing is 60-80 wt%; drying at 80-200 deg.C for 10-80 min; the thermal cracking temperature is 500-800 ℃, and the time is 10-80 min.
The activated sludge adsorption material is used for adsorbing algae and pollutants in the water body to obtain sediment, then the sediment is separated to obtain a mixture containing the algae, the sludge and the activated sludge adsorption material, and the mixture is dried at the temperature of 100-200 ℃ for 60-120min until the water content is not more than 20%; then performing anaerobic carbonization at 600-800 ℃ for 60-120min until the water content is not more than 1 wt%; and (3) putting the material to be activated after carbonization into a reaction tube of a muffle furnace, continuously introducing protective gas into the muffle furnace, after the air in the tube is exhausted, introducing water vapor at the temperature of 700mL/min for 600-.
Example 1
Separating the precipitate material, and drying at 200 deg.C for 60 min; the water content of the material after drying treatment is 20 wt%; carbonizing the dried material at 600 deg.C for 120min in the absence of oxygen, wherein the water content of the carbonized material is less than 1 wt%; the water vapor activation treatment is carried out in a muffle furnace, and the treatment process comprises the following steps: and (3) putting the material to be activated after carbonization into a reaction tube of a muffle furnace, continuously introducing nitrogen into the muffle furnace, introducing water vapor at a rate of 600mL/min after the air in the tube is exhausted, simultaneously heating to an activation temperature of 810 ℃ at a rate of 18 ℃/min for activation for 60min, and cooling to room temperature at a rate of 25 ℃/min after the activation is finished, thus obtaining the regenerated composite adsorbing material.
Example 2
Separating the precipitate material, and sequentially drying at 100 deg.C for 120 min; the water content of the material after drying treatment is 18 wt%; carbonizing the dried material at 800 deg.C for 60min, wherein the water content of the carbonized material is less than 1 wt%; the water vapor activation treatment is carried out in a muffle furnace, and the treatment process comprises the following steps: and (3) putting the material to be activated after carbonization treatment into a reaction tube of a muffle furnace, continuously introducing nitrogen into the muffle furnace, introducing water vapor at a rate of 700mL/min after the air in the tube is exhausted, simultaneously heating to an activation temperature of 800 ℃ at a rate of 15 ℃/min for activation for 80min, and cooling to room temperature at a rate of 20 ℃/min after the activation is finished, thus obtaining the regenerated composite adsorbing material.
Example 3
Separating the precipitate material, and drying at 150 deg.C for 90 min; the water content of the material after drying treatment is 19 wt%; carbonizing the dried material at 750 deg.C for 80min, wherein the water content of the carbonized material is less than 1 wt%; the water vapor activation treatment is carried out in a muffle furnace, and the treatment process comprises the following steps: and (3) putting the material to be activated after carbonization into a reaction tube of a muffle furnace, continuously introducing nitrogen into the muffle furnace, introducing water vapor at a rate of 700mL/min after the air in the tube is exhausted, simultaneously heating to an activation temperature of 850 ℃ at a rate of 15 ℃/min for activation for 80min, and cooling to room temperature at a rate of 25 ℃/min after the activation is finished, thus obtaining the regenerated composite adsorbing material.
Example 4
Separating the precipitate material, and drying at 180 deg.C for 80 min; the water content of the material after drying treatment is 19 wt%; carbonizing the dried material at 700 deg.C for 100min, wherein the water content of the carbonized material is less than 1 wt%; the water vapor activation treatment is carried out in a muffle furnace, and the treatment process comprises the following steps: and (3) putting the material to be activated after carbonization into a reaction tube of a muffle furnace, continuously introducing nitrogen into the muffle furnace, introducing water vapor at a rate of 600mL/min after the air in the tube is exhausted, simultaneously heating to an activation temperature of 900 ℃ at a rate of 18 ℃/min for activation for 40min, and cooling to room temperature at a rate of 25 ℃/min after the activation is completed, thus obtaining the regenerated composite adsorbing material.
Comparative example 1
The difference from example 1 is that a regenerated composite adsorbent was obtained without subjecting to steam activation treatment.
The activated sludge adsorbing material, the regenerated composite adsorbing materials prepared in examples 1 to 4 of the invention and the regenerated composite adsorbing material prepared in comparative example 1 without steam activation treatment were subjected to relevant tests for relevant parameters, and the results are shown below:
1) the specific surface area, total pore volume and iodine value of the regenerated composite adsorbing materials prepared in examples 1 to 4 and the regenerated composite adsorbing material prepared in comparative example 1 without water vapor activation treatment were measured, the specific surface area was measured by a V-Sorb-4800TP analyzer, the total pore volume was measured according to GB/T7702.20-2008, the iodine value was measured according to GB/T12496.8-2015, and the measurement results are as shown in table 1 below:
TABLE 1 relevant test parameters
As can be seen from table 1, the regenerated composite adsorbing material and the regenerated composite adsorbing material prepared without the water vapor activation treatment are the same composite materials after the blue algae and the active mud adsorbing material are treated, and the difference is that the regenerated composite adsorbing material is subjected to the water vapor activation treatment, and the specific surface area, the total pore volume and the iodine value are compared, and after the water vapor activation, the specific surface area of the regenerated composite material prepared by the method is increased by 1.6 times compared with the regenerated composite material prepared by the comparison document 1, which is enough to prove that the water vapor activation treatment contributes to the superior performance of the material prepared by the method.
Compared with the activated sludge adsorption material, the activated sludge adsorption material does not contain blue algae and is not subjected to steam activation treatment, the specific surface area of the regenerated composite adsorption material prepared by the method is 2.7 times higher than that of the activated sludge adsorption material, the iodine value is respectively 1 time higher than that of the activated sludge adsorption material, and the total pore volume value is increased, so that the dual functions of blue algae addition and steam activation treatment can be seen, and the performance of the material prepared by the method is greatly improved compared with that of the activated sludge adsorption material.
2) And the active mud adsorption material and the regenerated composite adsorption material prepared in example 1 are used for testing the adsorption of Total Volatile Organic Compounds (TVOC): preparing a volatile matter solution with the TVOC concentration of 10ppm, taking 6 equal parts of the volatile matter solution, and adding active mud adsorption materials according to the proportions of 100mg/L, 200mg/L, 300mg/L, 400mg/L, 500mg/L and 600mg/L respectively; then 6 equal parts of volatile matter solution are taken and added into the regenerated composite adsorbing material prepared in the example 1 according to the ratio of 100mg/L, 200mg/L, 300mg/L, 400mg/L, 500mg/L and 600mg/L respectively; after 60min, the TVOC in the solution was re-detected and the measured data are shown in Table 2 below:
TABLE 2 adsorption Effect test of TVOC
As can be seen from table 2 above, when the regenerated composite adsorbing material and the activated sludge adsorbing material prepared in example 1 of the present invention are respectively placed in a solution containing 10ppm of total volatile organic compounds TVOC, the performance of the regenerated composite adsorbing material prepared in the present invention for absorbing volatile organic compounds is more excellent.
3) Phosphate adsorption test on activated sludge adsorption material, the regenerated composite adsorption material prepared in example 1, and commercially available activated carbon for chemical analysis: firstly, an activated sludge adsorbing material, the regenerated composite adsorbing material prepared in example 1 and activated carbon for chemical analysis sold in the market are respectively washed 3 times by deionized water (3 times, the total water amount is 50-60mL), and the washed materials are dried by filtration and then dried at 100 ℃. Accurately weighing 0.4g +/-0.0005 g of active mud adsorbing material, the regenerated composite adsorbing material prepared in example 1 and the activated carbon for the chemical analysis sold in the market, respectively placing the materials into 100mL centrifuge tubes, and respectively adding 40mL potassium dihydrogen phosphate solution (phosphate radical concentration is 1000mg/L) into the centrifuge tubes; setting a blank control group, and adding 40mL of deionized water into the blank control group; shaking the above samples at room temperature (18 ℃) for 16 hours, standing, centrifuging at 5000rpm for 10min, taking supernatant, appropriately diluting, and testing the phosphate radical concentration in the samples by adopting ICP-OES. The concentration eq of the compound in the supernatant after equilibrium adsorption was calculated using the formula Q ═ Q)/m × V, where Q is the amount adsorbed, input is the concentration of the added solution, V is the volume of the added solution, and m is the mass of the material. The results are shown in Table 3 below:
TABLE 3 adsorption of phosphate
| Active mud adsorption material | Regenerated composite adsorption material | Activated carbon | |
| Phosphate adsorption amount mg/g | 23 | 38 | -22 |
As shown in table 3 above, in the activated sludge adsorbent, the regenerated composite adsorbent prepared in example 1, and the activated carbon for chemical analysis sold on the market, the adsorption amount of the activated sludge adsorbent is 23mg/g, the adsorption amount of the regenerated composite adsorbent prepared in example 1 is 38mg/g, the activated carbon for chemical analysis sold on the market has no adsorption capacity to phosphate, but releases a large amount of phosphate, and the adsorption amount is-22 mg/g, so that the material prepared in the present invention has a good adsorption to phosphate.
TABLE 4 elemental analysis of materials
In table 4 above, the mass content of carbon element is 11.4% -26.6%, and more than 90% of carbon element is present in the form of activated carbon base, and the remainder is carbonate, and the material also contains iron and aluminum compounds, which is a material with better adsorbability.
The prepared regenerative composite adsorption material is applied to the treatment of water organic matters, and the method comprises the following specific steps:
s1, introducing the water body containing the organic matters in the selected area into a water collecting tank by adopting a water channel, and lifting the sewage in the water collecting tank to a flocculation sedimentation tank;
s2, adding the prepared regenerated composite adsorption material into a flocculation sedimentation tank, returning clear liquid to a water body after the water quality in the tank is clear and the detection index is qualified, and preparing a circulating composite material from the residual sediment; the preparation method of the circulating composite material is the same as that of the regenerated composite adsorption material.
The size of the water collecting pool is 2.0m multiplied by 3.5m, and the effective water depth is 3.0 m; the size of the flocculation sedimentation tank is 5.0m multiplied by 4.0m, and the effective water depth is 3.5 m.
The flocculation sedimentation tank comprises a pre-filtration sedimentation tank and a post-filtration sedimentation tank; an adsorption filter screen for separating the pre-filtration sedimentation tank and the post-filtration sedimentation tank is arranged between the pre-filtration sedimentation tank and the post-filtration sedimentation tank; the adsorption filter screen comprises two parallel wire nets, and the regenerated composite adsorption material is tightly filled between the two wire nets; the bottoms of the pre-filtering sedimentation tank and the adsorption filter screen are provided with a sediment push-out device for horizontally pushing sediment out of the flocculation sedimentation tank; the two parallel wire nets are vertically arranged; and a throwing device for throwing the regenerated composite adsorption material is arranged at the top of the pre-filtering sedimentation tank. The adsorption filtration net is provided with the push pedal that the circulation was pushed down for the compound adsorption material of regeneration between two wire netting pushes down to the bottom of the pool, conveniently with the help of deposiing ejecting device will adsorb complete compound adsorption material of regeneration, the silt of sediment etc. and release the flocculation and precipitation pond from the bottom of the water pool. The top of the wire netting is provided with a front baffle and a rear baffle, the two adjacent push plates pushed down circularly are arranged at intervals, the front baffle covers the top of the pre-filtration sedimentation tank, and the rear baffle covers the top of the post-filtration sedimentation tank; when the volume of the treated water reaches a set amount, the adsorption material is considered to be completely adsorbed, the front baffle and the rear baffle are lifted from the tops of the pre-filtration sedimentation tank and the post-filtration sedimentation tank respectively and rotate to the vertical direction, and are pushed down vertically and then are attached to the outer sides of the two wire nets so as to protect the wire nets extruded by the filter-pressed materials in the push plate to be pushed down, so that the damage is caused, and the proceeding of the next adsorption cycle is influenced; the push plates move downwards, and the compact regenerative composite adsorption material is fixedly filled between every two adjacent push plates. The sediment pushing device pushes the sludge, the regenerative composite adsorption material which adsorbs the blue algae and the harmful substances out of the bottom of the tank together.
The horizontal height of the inlet of the sedimentation tank before filtration is higher than the liquid level of the sedimentation tank before filtration; the liquid level of the sedimentation tank before filtration is higher than that of the sedimentation tank after filtration; the height of the outlet of the sedimentation tank after filtration is smaller than the liquid level of the sedimentation tank after filtration; the sediment push-out device is arranged at the bottom of the flocculation sedimentation tank.
The regeneration composite adsorption material is used for purifying and treating water organic matters:
example 5
S1, introducing the water body containing the blue algae in the selected area into a water collecting tank by adopting a water channel, and lifting the sewage in the water collecting tank to a flocculation sedimentation tank;
s2, adding 8.75kg of prepared regenerated composite adsorption material into the flocculation sedimentation tank, and leading the clear liquid back to the water body after the water quality in the tank is clear and the detection index is qualified.
Example 6
S1, introducing the water body containing the blue algae in the selected area into a water collecting tank by adopting a water channel, and lifting the sewage in the water collecting tank to a flocculation sedimentation tank;
s2, adding 17.5kg of prepared regenerated composite adsorption material into the flocculation sedimentation tank, and leading the clear liquid back to the water body after the water quality in the tank is clear and the detection index is qualified.
Example 7
S1, introducing the water body containing the blue algae in the selected area into a water collecting tank by adopting a water channel, and lifting the sewage in the water collecting tank to a flocculation sedimentation tank;
and S2, adding 26.25kg of prepared regenerated composite adsorption material into the flocculation sedimentation tank, and leading the clear liquid back to the water body after the water quality in the tank is clear and the detection indexes are qualified.
Example 8
S1, introducing the water body containing the blue algae in the selected area into a water collecting tank by adopting a water channel, and lifting the sewage in the water collecting tank to a flocculation sedimentation tank;
s2, adding 35.0kg of prepared regenerative composite adsorption material into the flocculation sedimentation tank, and leading the clear liquid back to the water body after the water quality in the tank is clear and the detection index is qualified.
Example 9
S1, introducing the water body containing the blue algae in the selected area into a water collecting tank by adopting a water channel, and lifting the sewage in the water collecting tank to a flocculation sedimentation tank;
s2, adding 43.75kg of prepared regenerated composite adsorption material into the flocculation sedimentation tank, and leading the clear liquid back to the water body after the water quality in the tank is clear and the detection index is qualified.
Example 10
S1, introducing the water body containing the blue algae in the selected area into a water collecting tank by adopting a water channel, and lifting the sewage in the water collecting tank to a flocculation sedimentation tank;
s2, adding 52.5kg of prepared regenerative composite adsorption material into the flocculation sedimentation tank, and leading the clear liquid back to the water body after the water quality in the tank is clear and the detection index is qualified.
As can be seen from fig. 2 and 3 prepared according to the above example, after different amounts of the regenerated composite adsorbent are added to the organic-rich water, the Total Organic Carbon (TOC) in the water decreases from 5.5ppm to 2.0ppm, and the light absorption value of the organic substances such as chlorophyll and protein decreases from more than 1000 to less than 100 as the amount of the adsorbent increases. The total organic carbon and the absorbance show obvious and regular descending trends, and the death and flocculation of the blue algae can be obviously observed in the experiment, which indicates that the algae in the water is effectively controlled.
The above embodiments are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The method for treating algae in the water body is characterized in that a regenerative composite adsorption material is added into a flocculation sedimentation tank, and the preparation method of the regenerative composite adsorption material comprises the following steps:
and placing the activated sludge adsorption material prepared from the residual activated sludge into a water body, adsorbing algae and water body pollutants in the water body to obtain a precipitate, separating the precipitate, and sequentially carrying out drying treatment, carbonization treatment and steam activation treatment on the separated precipitate to obtain the regenerated composite adsorption material.
2. The method of claim 1, wherein the sediment comprises sludge and activated sludge adsorbent material that adsorbs algae and harmful substances; the algae comprise blue algae, green algae and the like; the water body pollutants comprise phosphates, nitrides and the like.
3. The method for treating algae in water body as claimed in claim 1, wherein the drying treatment condition is drying at 100-200 ℃ for 60-120min, and the water content of the material after drying treatment is less than 20 wt%; the carbonization treatment condition is 600-800 ℃ anaerobic carbonization for 60-120min, and the water content of the material after carbonization treatment is less than 1 wt%.
4. The method of claim 1, wherein the steam activation process comprises: and (3) putting the material to be activated after carbonization into a reaction tube of a muffle furnace, continuously introducing protective gas into the muffle furnace, after the air in the tube is exhausted, introducing water vapor at the temperature of 700mL/min for 600-.
5. The method of claim 4, wherein the muffle is heated at a rate of 18 ℃/min; the activation temperature is 810 ℃, and the activation time is 60 min; the cooling speed is 25 ℃/min; the flow rate of the water vapor was 600 mL/min.
6. The method for treating algae in water body according to claim 1, wherein the activated sludge adsorption material is prepared by the following steps: drying the residual activated sludge in a protective gas atmosphere to obtain dried sludge; thermally cracking the dried sludge in a protective gas atmosphere to obtain an active sludge adsorption material; the drying temperature of the residual activated sludge is 80-200 ℃, and the drying time is 10-80 min; the temperature of the thermal cracking is 500-800 ℃, and the time is 10-80 min.
7. The method for treating algae in water body according to any one of claims 1 to 6, comprising the following steps:
s1, introducing the water body containing algae in the selected area into a water collecting tank by adopting a water channel, and lifting the sewage in the water collecting tank to a flocculation sedimentation tank;
s2, adding the prepared regenerated composite adsorption material into a flocculation sedimentation tank, returning clear liquid to a water body after the water quality in the tank is clear and the detection index is qualified, and preparing a circulating composite material from the residual sediment; the preparation method of the circulating composite material is the same as that of the regenerated composite adsorption material.
8. The method for algae treatment in a body of water of claim 7, wherein: a coarse grating and a fine grating are respectively arranged in the ditch; the gap between the coarse grids is 15-20 mm; the gap between the fine grids is 5-10 mm.
9. The method for algae treatment in a body of water of claim 7, wherein: the flocculation sedimentation tank comprises a pre-filtration sedimentation tank and a post-filtration sedimentation tank; an adsorption filter screen for separating the pre-filtration sedimentation tank and the post-filtration sedimentation tank is arranged between the pre-filtration sedimentation tank and the post-filtration sedimentation tank; the adsorption filter screen comprises two parallel wire nets, and the regenerated composite adsorption material is tightly filled between the two wire nets; the bottoms of the pre-filtering sedimentation tank and the adsorption filter screen are provided with a sediment push-out device for horizontally pushing sediment out of the flocculation sedimentation tank; the two parallel wire nets are vertically arranged; and a throwing device for throwing the regenerated composite adsorption material is arranged at the top of the pre-filtering sedimentation tank.
10. The method of claim 7, wherein: the water inlet of the pre-filtering sedimentation tank is higher than the liquid level in the pre-filtering sedimentation tank; the liquid level in the pre-filtering sedimentation tank is higher than that in the post-filtering sedimentation tank; the height of the outlet of the filtered sedimentation tank is smaller than the liquid level of the filtered sedimentation tank; the sediment push-out device is arranged at the bottom of the flocculation sedimentation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010588010.7A CN111762838B (en) | 2020-06-24 | 2020-06-24 | Water algae treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010588010.7A CN111762838B (en) | 2020-06-24 | 2020-06-24 | Water algae treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111762838A true CN111762838A (en) | 2020-10-13 |
| CN111762838B CN111762838B (en) | 2023-08-04 |
Family
ID=72722213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010588010.7A Active CN111762838B (en) | 2020-06-24 | 2020-06-24 | Water algae treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111762838B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1170400A (en) * | 1997-06-17 | 1999-03-16 | Yonemi Tanaka | Sludge treatment method |
| JP2003079266A (en) * | 2001-09-07 | 2003-03-18 | Kenji Shinohara | Concrete member for cleaning water and improving seabed |
| JP2007326090A (en) * | 2006-06-06 | 2007-12-20 | Sawada Shoji | Water purifying and activating method in closed water area putting natural material to practical use and construction method therefor |
| CN105523555A (en) * | 2016-01-14 | 2016-04-27 | 上海交通大学 | Activated carbon preparation method of sludge type argillaceous biomass |
| CN106311191A (en) * | 2016-08-25 | 2017-01-11 | 合肥百和环保科技有限公司 | Preparing method of compound adsorbing material |
-
2020
- 2020-06-24 CN CN202010588010.7A patent/CN111762838B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1170400A (en) * | 1997-06-17 | 1999-03-16 | Yonemi Tanaka | Sludge treatment method |
| JP2003079266A (en) * | 2001-09-07 | 2003-03-18 | Kenji Shinohara | Concrete member for cleaning water and improving seabed |
| JP2007326090A (en) * | 2006-06-06 | 2007-12-20 | Sawada Shoji | Water purifying and activating method in closed water area putting natural material to practical use and construction method therefor |
| CN105523555A (en) * | 2016-01-14 | 2016-04-27 | 上海交通大学 | Activated carbon preparation method of sludge type argillaceous biomass |
| CN106311191A (en) * | 2016-08-25 | 2017-01-11 | 合肥百和环保科技有限公司 | Preparing method of compound adsorbing material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111762838B (en) | 2023-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hu et al. | Comparison study on the ammonium adsorption of the biochars derived from different kinds of fruit peel | |
| Han et al. | Adsorption-pyrolysis technology for recovering heavy metals in solution using contaminated biomass phytoremediation | |
| De Filippis et al. | Production and characterization of adsorbent materials from sewage sludge by pyrolysis | |
| CN110813239A (en) | Preparation method of biochar-loaded lanthanum-doped iron oxide | |
| CN112340830B (en) | Application of catalyst taking waste adsorbent after adsorption-desorption as raw material in treating high-salt organic wastewater by activating persulfate | |
| CN112569900B (en) | Preparation method and application of municipal sludge biochar | |
| CN113786804A (en) | Preparation method and application of magnetic porous composite material for adsorbing heavy metals | |
| RU2395336C1 (en) | Method of preparing carbonaceous adsorbent from sunflower husks | |
| CN109110861A (en) | A kind of application of municipal sludge in the treatment of waste water | |
| CN113019323B (en) | Ultrasonic activated biochar and preparation method and application thereof | |
| CN112495337B (en) | Method for preparing ceramsite filter material by using oil-containing sludge | |
| CN111804273B (en) | Regenerated adsorbing material and preparation method thereof | |
| CN111762838B (en) | Water algae treatment method | |
| CN113042018A (en) | Preparation method and application of calcium-rich biochar | |
| Gholami Borujeni et al. | Removal of heavy metal ions from aqueous solution by application of low cost materials | |
| CN113856628B (en) | Metal modified biochar capable of efficiently recovering and desorbing phosphorus, and preparation method and application thereof | |
| CN112934169A (en) | Silicon-based mesoporous microsphere for rapidly adsorbing and removing inorganic phosphorus and preparation method thereof | |
| KR100205173B1 (en) | Alginic acid gel water treatment agent for removing heavy maetal and process for preparing same | |
| KR102577177B1 (en) | Phosphorus removal agent from wastewater and its manufacturing method | |
| CN113336294B (en) | Application of tannery sludge in wastewater degradation | |
| CN110833815A (en) | Preparation method of biochar for efficiently adsorbing heavy metals in water | |
| Wu et al. | Preparation of biochars from bio-waste for removing pollutants from river water | |
| Pikkov et al. | Characteristics of activated carbon produced from biosludge and its use in wastewater post-treatment | |
| CN109939644B (en) | Preparation method of modified biochar | |
| CN116351390A (en) | Charcoal regenerated by pyrolysis quality improvement of hydrothermal charcoal based on cadmium adsorption, and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |