CN112897824A - Bamboo charcoal-photosynthetic bacteria-constructed wetland integration sewage treatment system - Google Patents
Bamboo charcoal-photosynthetic bacteria-constructed wetland integration sewage treatment system Download PDFInfo
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- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 86
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
- C02F2101/20—Heavy metals or heavy metal 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
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system. The treatment system comprises a zeolite zone and an adsorption treatment system which are detachably connected; the adsorption treatment system comprises a first chamber and a second chamber which are communicated with each other; the zeolite zone is in communication with the first chamber; the first chamber and the second chamber are sequentially provided with a Leersia hexandra Swartz, an organic matter adsorption layer, a common adsorption layer and a basal layer from top to bottom. The utility model provides an use leersia hexandra swartz as the aquatic plant in the constructed wetland system, cooperate with the modified bamboo charcoal that has the photosynthetic bacteria through leersia hexandra swartz, and form the microbial cell through the modified bamboo charcoal and the bamboo charcoal that adsorb photosynthetic bacteria, can effectually detach the poisonous and harmful component in the waste water, shorten sewage treatment time, effectual realization carries out purification treatment's purpose to waste water, composite system can separate according to actual conditions simultaneously, every part can be applied to different situations alone, carry out sewage treatment.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system.
Background
Domestic sewage is a general term for various kinds of sewage generated by water used in daily life of people. Mainly comprises washing water, flushing water, excrement water and the like, and has sewage discharge of collective units and enterprise and public institutions besides the sewage discharge of families. The main characteristics of the sewage are presented: 1. contains various bacteria, viruses and the like, and is easy to transmit diseases; 2. the contents of nitrogen, phosphorus, sulfur and the like are high; 3. contains saccharide, starch, cellulose, urea, etc. which are easy to generate foul smell under anaerobic condition; 4. contains heavy metals such as copper and cadmium; 5. containing Pharmaceuticals and Personal Care Products (PPCPS); 6. the amount of residual disinfection by-products (DBPS) commonly used in drinking water is too high. Due to the appearance of biodiversity, novel detergents and bathroom products, the treatment of bacteria, viruses and difficultly degraded sewage in sewage is increased, and meanwhile, due to the appearance of external factors such as multiple weather changes, the single treatment technology is difficult to achieve effective effect, and the emission requirement can be met only by combining several treatment technologies to form a system to play a role together.
Photosynthetic bacteria (PSB) are a type of light-powered, CO-powered2Or organic matter as a carbon source, and water-ring microorganisms that undergo vegetative propagation by photosynthesis are widely found in nature and are more common in water areas with high organic matter concentrations. The photosynthetic bacteria are gram-negative bacteria, contain various nutrient substances and physiologically active substances, and have the functions of photosynthesis, fermentation, nitrogen fixation, heavy metal removal, hydrogen production and the like. The use of photosynthetic bacteria in sewage treatment began in the 1960 s. The self-cleaning process of high-concentration organic wastewater in nature is the result of ecological succession of microbiota with different nutrition levels, discovered by Japan scientist Xiaolin Zhengtai and the like, and the photosynthetic bacteria pass through the processPlays an important role in the process, and firstly, researches on the treatment of organic wastewater by a photosynthetic bacteria method are carried out. Compared with the currently widely used biological wastewater treatment systems such as an activated sludge process, a biofilm process and an anaerobic process, the PSB can directly and efficiently treat various high-concentration organic wastewater under natural illumination and trace aerobic conditions, and the wastewater does not need to be diluted before treatment. Meanwhile, hydrogen is generated in the treatment process, so that a way is provided for the development of new energy. The photosynthetic bacteria cell contains rich nutrient substances such as bacteriochlorin, carotenoid and the like, can be comprehensively utilized and can not cause secondary pollution when being used as the bait of livestock and the like.
Bamboo charcoal as a porous medium material has high porosity, large specific surface area, good adsorbability, stable physical and chemical properties, low cost and easy acquisition, has the performance characteristics of a microorganism immobilized carrier material, and can be used as a microorganism immobilized carrier. There have been reports on the adsorption of microorganisms on waste water by using bamboo charcoal as a carrier. Rosujun et al (water treatment technology 2009, 35(3):86-89) report that the treatment effect of the biological aerated filter is improved by using bamboo charcoal to adsorb EM; sunxiang et al (environmental science and technology, 2009, 32 (3): 151-; zhoushan et al (journal of chemical engineering in colleges and universities 2008, 22(5): 889-. In the methods, the aerobic microorganisms or the mixed flora of the aerobic microorganisms and the anaerobic microorganisms are fixed by using bamboo charcoal, so that aeration is needed in the sewage treatment process, and the treatment cost is increased. Meanwhile, in the culture process of the mixed flora, the growth of part of strains is inhibited and the like due to nutrition and space competition among the strains, so that the sewage treatment effect is influenced. The activated bamboo charcoal is used for adsorbing photosynthetic bacteria to treat sewage, and no relevant report is provided at home.
In addition, the sewage contains COD, phosphorus, ammonia nitrogen and other pollutants, and also contains various heavy metal pollutants, and the Leersia hexandra Swartz is a good choice for removing the heavy metal pollutants. Leersia hexandra Swartz is a perennial gramineae plant, has strong vitality and strong environmental adaptability, and is widely applied to wetland systems for treating heavy metal chromium in recent years. The Leersia hexandra Swartz has strong enrichment effect on metal Cr (III) and Cr (IV) and has good tolerance on metal Cu.
Therefore, the method for treating sewage by compounding the leersia hexandra and the photosynthetic bacteria adsorbed by the modified bamboo charcoal to form the artificial wetland has no relevant report in China, and the method for compounding the leersia hexandra and the photosynthetic bacteria and researching the interaction relationship of the leersia hexandra and the photosynthetic bacteria has no relevant report in China.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system which can effectively remove nitrogen, phosphorus, COD and BOD in wastewater5Cadmium, copper and the like, and enhances the decomposition, migration and conversion capability of the organic pollutants which are toxic, harmful and difficult to degrade in the wastewater.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
a bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system comprises a zeolite area and an adsorption treatment system which are connected in a detachable way; the adsorption treatment system comprises a first chamber and a second chamber which are communicated with each other; the zeolite zone is in communication with the first chamber; the first chamber and the second chamber are sequentially provided with a Leersia hexandra Swartz, an organic matter adsorption layer, a common adsorption layer and a basal layer from top to bottom.
Further, the particle size of the zeolite is 26-30 mm.
Further, the zeolite particle size was 26.5 mm.
Further, the organic matter adsorption layer is a photosynthetic bacteria layer loaded by the modified bamboo charcoal.
Further, the preparation method of the modified bamboo charcoal comprises the following steps: washing the activated bamboo charcoal with deionized water, drying, placing in a muffle furnace, and modifying at 700 deg.C.
Further, the process of loading photosynthetic bacteria on the modified bamboo charcoal comprises the following steps: concentrating photosynthetic bacteria culture solution by 3-5 times, adjusting pH to 4.0-5.0, adding modified bamboo charcoal pulverized to 5-10 mesh, adsorbing at 30-40 deg.C and 80-100r/min for 4-5 hr, and filtering.
Furthermore, the load capacity of the photosynthetic bacteria is that 15-25g of modified bamboo charcoal is added into every 100mL of photosynthetic bacteria culture solution.
Further, the photosynthetic bacteria are commercially available Rhodopseudomonas palustris (Rhodopseudomonas palustris) with a deposit number of: CCREM SDMCC 150013, ACCC10650, CGMCC1.2349 or GIM 1.167.
Further, the production method of the rhodopseudomonas palustris seed liquid comprises the following steps: adding NH to every 1000mL of water4Cl1.0-1.5g、CH3COONa 2.5-3.5g、MgCl2 0.1-0.18g，CaCl2 0.1-0.25g、KH2PO40.55-0.6g，K2HPO40.38-0.52g of NH and 0.1-0.25g of yeast extract4Cl、CH3COONa、MgCl2、CaCl2、KH2PO4、K2HPO4And dissolving yeast extract in water, adjusting pH to 7.5-8.5, sterilizing at 110-8CFU/mL Rhodopseudomonas palustris seed liquid.
Further, the production method of the fermentation liquor comprises the following steps: adding 3-4g of sodium acetate and NH into 1000mL of water4Cl 2-3g、NaCl 0.1-0.25g、CaCl2 0.05-0.08g、KH2PO4 0.5-0.6g、K2HPO4 0.3-0.45g、MgSO4·7H2O 0.2-0.3g、MnSO4·2H2O 0.02-0.035g、FeCl30.002-0.004g of sodium acetate and 0.1-0.2g of yeast extract4Cl、NaCl、CaCl2、KH2PO4、K2HPO4、MgSO4·7H2O、MnSO4·2H2O、FeCl3And yeast extract dissolved in water at a natural pH in110-115 ℃ sterilization for 25-30 minutes, and cooling to 30-40 ℃.
Further, the common adsorption layer is a bamboo charcoal layer.
Further, the substrate layer is composed of gravels with the grain diameter of 10-20 mm.
Furthermore, a first water inlet is formed in the bottom of the zeolite area, a second water inlet communicated with the zeolite area is formed in the upper end of the adsorption treatment system, and a water outlet is formed in the bottom of the adsorption treatment system on the side far away from the zeolite area.
A microbial fuel cell comprises an anode and a cathode, wherein the anode is modified bamboo charcoal or bamboo charcoal; the cathode is modified bamboo charcoal or bamboo charcoal; and the anode and the cathode are made of different materials, namely when the anode is the modified bamboo charcoal, the cathode is the bamboo charcoal.
Further, the modified bamboo charcoal and the bamboo charcoal are filled into the roller; the roller is provided with a plurality of through holes with the diameter smaller than that of the modified bamboo charcoal and the bamboo charcoal.
Further, the modified bamboo charcoal and the bamboo charcoal are both provided with wires; the lead extends out of the compound sewage treatment system, and a resistor is arranged between the lead and the compound sewage treatment system.
Further, the resistor may be an LED lamp.
The invention has the beneficial effects that:
1. modified bamboo charcoal loaded photosynthetic bacteria in the application mainly aim at the non-degradable toxic and harmful organic matters, are degraded through organic matter strengthening, eliminate the inhibition of the toxic and harmful organic matters on wetland microorganisms, and are matched with Leersia hexandra Swartz to further remove components such as heavy metals in wastewater, thereby effectively realizing the purpose of purifying the wastewater.
2. In the composite system, the photosynthetic bacteria not only can play a role of purifying sewage by themselves, but also can induce and improve the resistance of the Leersia hexandra Swartz through a defense signal cross effect, thereby enhancing the viability of the Leersia hexandra Swartz in a harmful environment and the removal rate of heavy metal components.
3. The activated bamboo charcoal has higher porosity and larger specific surface area after being modified, can effectively promote the adsorption effect of the activated bamboo charcoal on harmful components in the wastewater, and simultaneously can also promote the contact area of the bamboo charcoal and photosynthetic bacteria, thereby greatly promoting the load capacity on the photosynthetic bacteria, and further promoting the purification effect of a system on the wastewater.
4. This application is constituteed by zeolite district and adsorption system that is linked together, but zeolite district and adsorption system in this application both independent settings can be split into solitary functional unit, can be according to actual conditions's needs, carry out split or combination with both, then exert corresponding purification performance again, can be applicable to the waste water treatment of various different conditions, have promoted the throughput of processing system to waste water under different conditions greatly.
5. When the adsorption system treats wastewater, the modified bamboo charcoal and the bamboo charcoal which adsorb photosynthetic bacteria in the system form the microbial cell, namely the modified bamboo charcoal is used as the anode or the cathode of the microbial cell, and then the bamboo charcoal is used as the corresponding cathode or the anode. The microbial battery who forms not only can be with the chemical energy conversion of the processing in-process electric energy, accomplish and retrieve clean energy from waste water, can also effectually accelerate the purification treatment efficiency of lift system to sewage, shorten the processing time of system to sewage greatly.
Drawings
FIG. 1 is a schematic diagram of the present system;
FIG. 2 is a schematic structural view of an organic substance adsorbing layer;
fig. 3 is a schematic structural view of a general adsorption layer.
Wherein, 1, a basal layer; 2. a common adsorption layer; 3. an organic substance adsorbing layer; 4. leersia hexandra Swartz; 5. a second water inlet; 6. a water outlet; 7. a zeolite zone; 8. a first water inlet; 9. a third water inlet; 10. a first chamber; 11. a second chamber; 12. a wire; 13. a drum; 14. and a through hole.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Examples
As shown in fig. 1, the bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system comprises a zeolite zone 7 and an adsorption treatment system, wherein the adsorption treatment system is composed of a first chamber 10 and a second chamber 11 which are independent from each other, and the first chamber 10 and the second chamber 11 are communicated through a second water inlet 5 arranged at the upper end.
As shown in fig. 1, a first water inlet 8 for wastewater to enter the system is opened at the upper end of the zeolite zone 7, and then a third water inlet 9 communicated with a first chamber 10 is opened at the bottom of the zeolite zone 7. Meanwhile, the zeolite area 7 and the adsorption treatment system are independently arranged, so that the zeolite area 7 and the adsorption treatment system can be separated according to actual use conditions, and the two can work independently.
As shown in fig. 1, the adsorption treatment system comprises a leersia hexandra swartz 4, an organic matter adsorption layer 3, a common adsorption layer 2 and a substrate layer 1 which are sequentially arranged from top to bottom, wherein a second water inlet 5 is formed at the upper end of the system, and a water outlet 6 is formed at the bottom of the system; the organic matter adsorption layer 3 and the common adsorption layer 2 are filled in the roller 13, and the roller 13 is provided with a through hole 14 with the aperture smaller than the diameters of the modified bamboo charcoal and the bamboo charcoal. And the modified bamboo charcoal and the bamboo charcoal are both filled with wires 12 extending to the outside of the system, and resistors are arranged between the wires 12 and can be LED lamps.
Wherein, leersia hexandra 4 can carry out primary treatment to the entering waste water when treating the waste water, removes the components such as heavy metal contained therein, and carries out primary purification to the waste water.
And then the wastewater is further treated by an organic matter adsorption layer 3 formed by the modified bamboo charcoal-loaded photosynthetic bacteria, toxic and harmful organic matter components contained in the wastewater are removed, the toxic and harmful organic matter components are degraded into components such as macromolecular saccharides and the like which can be utilized by microorganisms in the environment, and the wastewater treatment efficiency can be remarkably improved by matching the organic matter adsorption layer with the Leersia hexandra Swartz.
Finally, the waste water is finally disinfected and purified by a common adsorption layer 2 formed by bamboo charcoal and a base layer 1 formed by gravels, and the whole purification process of the waste water is completed.
When the inland inundation takes place in the city, can cooperate through zeolite district 7 or the absorption processing system that this system or this system in the split come and the blowdown clean system of city itself, or sponge city, reach and alleviate the inland inundation of city fast, purify the effect of urban sewage, promoted the treatment effect of sewage.
Meanwhile, the modified bamboo charcoal in the system can be used as an anode or a cathode, the bamboo charcoal can be used as the anode or the cathode opposite to the modified bamboo charcoal, a special microbial fuel cell is formed, chemical energy in the treatment process can be converted into electric energy while sewage formed by urban inland inundation is treated, and corresponding clean energy can be obtained through recycling. And due to the existence of the microbial fuel cell, the sewage purification time of the system can be greatly shortened, and compared with a system without the microbial fuel cell, the treatment time for achieving the same treatment effect can be shortened by more than half.
In addition, since the Leersia hexandra Swartz matched with the modified bamboo charcoal loaded with photosynthetic bacteria is added into the adsorption system, the heavy metal components contained in the water body can be removed while the sewage is adsorbed and purified, and the adsorption system can be independently used for treating the heavy metal pollution of rivers or sewage.
The system can play a self-adsorption purification function of photosynthetic bacteria, modified bamboo charcoal, gravel, bamboo charcoal and other components on sewage, and can be matched with Leersia hexandra Swartz to form a closed-loop sustainable system, in the system, the modified bamboo charcoal adsorbing the photosynthetic bacteria is used as an anode or a cathode, and the bamboo charcoal in the common adsorption layer 2 is used as a cathode or an anode corresponding to the modified bamboo charcoal, so that the microbial fuel cell is formed. The microbial battery can convert chemical energy in the treatment process into electric energy, and the process of recycling clean energy from the wastewater is completed.
Examples of the experiments
1. The composite system prepared by the method is used for treating wastewater containing heavy metal components for 36h, and CO is contained in 100kg of wastewaterThe D content is 460.5mg/L, BOD5The content is 605.7mg/L, the ammonia nitrogen content is 22.3mg/L, the phosphorus content is 6.4mg/L, Cu, the content is 12.6mg/L, Cd, and the content is 5.8 mg/L; meanwhile, the combination of bamboo charcoal + leersia hexandra swartz, photosynthetic bacteria and bamboo charcoal + photosynthetic bacteria is used as a control group, and the treatment results of the experimental group and the control group on the wastewater are shown in table 1.
TABLE 1 results of wastewater treatment
As can be seen from the data in Table 1, the sewage treatment system is constructed by adopting a composite mode of modified bamboo charcoal, photosynthetic bacteria and Leersia hexandra Swartz, and a microbial fuel cell is formed during sewage treatment, so that the constructed system can effectively remove harmful components such as COD (chemical oxygen demand), nitrogen, phosphorus, cadmium, copper and the like contained in the sewage within about 36 hours, and the purified wastewater meets the requirements of the comprehensive sewage discharge standard. In addition, the comparison with a control group shows that the composite system prepared by the embodiment of the application has higher removal rate of heavy metal components and COD compared with the bamboo charcoal + Leersia hexandra without adding photosynthetic bacteria.
Claims (10)
1. A bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system is characterized by comprising a zeolite area and an adsorption treatment system which are detachably connected; the adsorption treatment system comprises a first chamber and a second chamber which are communicated with each other; the zeolite zone is in communication with the first chamber; the first chamber and the second chamber are sequentially provided with a Leersia hexandra Swartz, an organic matter adsorption layer, a common adsorption layer and a basal layer from top to bottom.
2. The bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system according to claim 1, wherein the organic matter adsorption layer is a modified bamboo charcoal-loaded photosynthetic bacteria layer.
3. The bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system according to claim 2, wherein the preparation method of the modified bamboo charcoal comprises the following steps: washing the activated bamboo charcoal with deionized water, drying, placing in a muffle furnace, and modifying at 700 deg.C.
4. The bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system according to claim 2, wherein the process of loading photosynthetic bacteria on the modified bamboo charcoal comprises the following steps: concentrating photosynthetic bacteria culture solution by 3-5 times, adjusting pH to 4.0-5.0, adding modified bamboo charcoal pulverized to 5-10 mesh, adsorbing at 30-40 deg.C and 80-100r/min for 4-5 hr, and filtering.
5. The bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system according to claim 4, wherein the photosynthetic bacteria load is 15-25g of modified bamboo charcoal per 100mL of photosynthetic bacteria culture solution.
6. The bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system according to claim 1, wherein the common adsorption layer is a bamboo charcoal layer.
7. The bamboo charcoal-photosynthetic bacteria-constructed wetland integrated sewage treatment system according to claim 1, wherein the substrate layer is composed of gravels with the particle size of 10-20 mm.
8. The microbial fuel cell is characterized by comprising an anode and a cathode, wherein the anode is modified bamboo charcoal or bamboo charcoal; the cathode is modified bamboo charcoal or bamboo charcoal; and the anode and cathode materials are different.
9. The microbial fuel cell according to claim 8, wherein the modified bamboo charcoal and the bamboo charcoal are both filled in the roller; the roller is provided with a plurality of through holes with the diameter smaller than that of the modified bamboo charcoal and the bamboo charcoal.
10. The microbial fuel cell according to claim 8, wherein the modified bamboo charcoal and the bamboo charcoal are both provided with a wire; the lead extends out of the compound sewage treatment system, and a resistor is arranged between the lead and the compound sewage treatment system.
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