CN105692850A - Preparation technique of banana peel polymer coagulant for water treatment - Google Patents
Preparation technique of banana peel polymer coagulant for water treatment Download PDFInfo
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- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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Abstract
The invention belongs to the technical field of water treatment and relates to a preparation technique of a banana peel polymer coagulant for water treatment. The technique making main use of 'low-temperature water extraction' at 30-50 DEG C comprises the following steps: (1), adding certain water to crushed banana peel powder at certain temperature under stirring, and leaching; (2), adding little sodium hydroxide solution at certain temperature under stirring; (3), selectively adding certain sodium hypochlorite and stabilizing agent to obtain coagulant products with different effects and stability. The banana peel polymer coagulant for water treatment that is high in banana peel utilization rate, low in preparation cost, good in stability, excellent in water treatment effect and high efficiency of removal particularly for color and heavy metals and can provide discharged water having pH in the neutral or weakly alkaline range may be prepared through the technique. The banana peel polymer coagulant for water treatment is widely applicable to the fields such as drinking water, urban wastewater and industrial wastewater.
Description
Technical field
The invention belongs to water-treatment technology field, relate to the technology of preparing of a kind of water process Pericarpium Musae high-molecular coagulant adopting being raw material with Pericarpium Musae。
Background technology
Coagulation process is to apply one of most common unit operation in numerous water treatment technology, belongs to the physical chemistry processing method of water。By to dosing coagulant in water and waste water (or being called water purification agent, flocculant) so that it is in the float being difficult to precipitate of colloidal substance or less there is cohesion and flocculation and precipitate and separate out, make drinking water and all kinds of dirt (giving up) water be purified。In drinking water treatment, coagulation is as pre action operation requisite in the water purification process of earth's surface, the relevant physical and chemical indexs such as the turbidity of former water, colourity can be reduced, also multiple harmful substances and microorganism in water can be removed, the performance that also imparting colloid or particle are stopped in subsequent filter operation simultaneously。The quality of coagulation effect, decides the operating condition of follow-up flow process, final outflow water water quality and water handling to a great extent and uses。In waste water two grades or tertiary treatment, coagulation process often processes process combination with other and uses, to alleviate biochemical treatment load or to remove residual organic matter, inorganic matter and microorganism。Additionally, coagulation process is also used to the thickening of mud。Therefore coagulation process is scientific research and development field important in water treatment procedure all the time, and coagulant is the core technology of coagulation process。Coagulant is divided into inorganic coagulant, organic coagulants, microorganism coagulant three major types, and each big apoplexy due to endogenous wind is respectively provided with various kind, has low molecule, a macromolecule, unitary type, compound, but generally at a low price, direction efficient, nontoxic develops。Inorganic coagulant price is relatively low, and stability is better, and tool has great advantage, but biological and environment are all had a degree of negative effect。The feature that synthetic organic polymer coagulant has efficiently, consumption is few, but biological and environment be will also result in very big harm by residue。Microorganism coagulant is substantially nontoxic, but prepares from it, stores and be respectively provided with unstability to use, is therefore also substantially at conceptual phase at present, promotes the exploration needing remain for longer a period of time apart from its scale。
Natural high molecular substance aboundresources, cheap, degradable, nontoxic, there is good environmental acceptance, and for the former water that toxicity is less or nontoxic, the mud that water produces after processing completely can farmland reuse, therefore obtain the extensive concern of countries in the world water treatment field expert in recent years。And agriculture and forestry organic waste material is applied in the scope expanding day of water treatment field, such as rice husk, rice straw, straw, corn stalk, Pericarppium arachidis hypogaeae, bagasse, fruit peel etc.。Fructus Musae belongs to the main fruit of Perenniporia martius, very big in China's south China yield, has the title of " four big fruit "。In recent years due to the structural adjustment of agricultural industrialization, banana production is significantly increased, and within 2014, China's Fructus Musae total output reaches 11,790,000 tons。And the weight of Pericarpium Musae can account for about the 40% of its fruit weight, yield is huge, cheap, additionally also having significant component of Pericarpium Musae to abandon in the environment as garbage, if do not dealt carefully with, environment can cause a degree of negative effect。Relate generally to the research of glucide (pectin, dietary fiber, polysaccharide etc.), aldehydes matter (polyphenol, flavone, tannin etc.) and other functional components (melanin, fatty acid etc.) at present about the research of Pericarpium Musae deep processing and deep exploitation, and only exist in the laboratory research stage。Mainly include adsorptivity about Pericarpium Musae in the application of water treatment field and directly utilize two broad aspect。There are some patents utilized about Pericarpium Musae adsorptivity at present both at home and abroad, such as: a kind of Pericarpium Musae modified activated carbon diatomite particle for desulfurization and dedusting and preparation method thereof (CN201510191618.5), a kind of preparation (CN100406396C) of the modified Pericarpium Musae adsorbent of pyromellitic acid anhydride, Pericarpium Musae is utilized to prepare the method for ammonia nitrogen adsorbent and the application (CN201310168967.6) of ammonia nitrogen adsorbent, the dye sorbent (CN201210121603.8) that a kind of Pericarpium Musae is made。Wherein CN100406396C provides a kind of with Pericarpium Musae for primary raw material, with the preparation method of the modified Pericarpium Musae adsorbent of PMDA that PMDA is modifying agent；CN201310168967.6 provides one only by the broken washing by soaking of dehydration, utilizes the method that Pericarpium Musae prepares ammonia nitrogen adsorbent；CN201210121603.8 provides a kind of method adopting fermentation method that Pericarpium Musae is prepared dye sorbent。Also some are had to directly utilize the patent of Pericarpium Musae about water treatment procedure both at home and abroad at present, such as: utilize the method (CN201210009635.9) of Pericarpium Musae processing waste water containing chrome, utilize Pericarpium Musae to cook liquid and remove the method (CN201110442551.X) of Microcystis aeruginosa in water body。The above-mentioned preparation being all not directed to the water process coagulant being raw material with Pericarpium Musae about Pericarpium Musae in the application technology of water treatment field。In current domestic and foreign literature data base, also have no with Pericarpium Musae for raw material, prepare the relevant report of water process Pericarpium Musae coagulant with simple " water at low temperature lifting manipulation "。
Summary of the invention
Present invention is primarily intended to open up a kind of new thinking for comprehensive utilization Pericarpium Musae, solve the technical problem that the technology of preparing being to provide a kind of water process Pericarpium Musae high-molecular coagulant adopting, by utilizing the Pericarpium Musae containing inorganic salts such as saccharide, tannin, pectin, calcium and magnesium to prepare the Pericarpium Musae high-molecular coagulant adopting that water treatment efficiency is more excellent, subject range is wider。
In order to achieve the above object, the technical solution used in the present invention is as follows:
Component and the content of water process Pericarpium Musae high-molecular coagulant adopting is:
Pericarpium Musae 1.5% ~ 15%
Water 79% ~ 98%
Mass fraction is the sodium hydroxide solution 0.08% ~ 3.5% of 15% ~ 45%
Mass fraction is the liquor natrii hypochloritis 0% ~ 3.5% of 10% ~ 13%
Stabilizer 0% ~ 0.015%,
All percents are weight percentage；
Sodium hydroxide used is technical grade product；
Sodium hypochlorite used is technical grade product；
The used Kazon solution that the mass fraction that stabilizer is active component is 14% ~ 15%, technical grade product；
The technology of preparing that above-mentioned each component is made water process Pericarpium Musae high-molecular coagulant adopting of the present invention is " water at low temperature lifting manipulation ", and concrete scheme is as follows:
(1) Pericarpium Musae is dried, and be ground into Powdered；
(2) under the mixing speed of 150 revs/min ~ 300 revs/min, water by the 79% ~ 98% of 30 DEG C ~ 50 DEG C joins in the Powdered Pericarpium Musae of 1.5% ~ 15%, stirs 1 minute ~ 5 minutes, then continuous heating 1 hour ~ 4 hours at the temperature of 30 DEG C ~ 50 DEG C, obtain extracting mixed liquor, standby；
(3) when the mixing speed of 300 revs/min ~ 800 revs/min and temperature are 30 DEG C ~ 50 DEG C, mass fraction by 0.08% ~ 3.5% be 15% ~ 45% sodium hydroxide solution join in said extracted mixed liquor, stir 10 minutes ~ 25 minutes, obtain the poly-liquid of alkali, standby；
(4) when the mixing speed of 150 revs/min ~ 350 revs/min and temperature are 30 DEG C ~ 50 DEG C, mass fraction by 0% ~ 3.5% be 10% ~ 13% liquor natrii hypochloritis join in the poly-liquid of above-mentioned alkali, stir 3 minutes ~ 10 minutes, obtain the poly-distiller liquor of alkali, then when the mixing speed of 150 revs/min ~ 350 revs/min and temperature are 30 DEG C ~ 50 DEG C, the mass fraction of the active component by 0% ~ 0.015% be 14% ~ 15% Kazon solution join in the poly-distiller liquor of above-mentioned alkali, stir 3 minutes ~ 10 minutes, stop stirring, left at room temperature ripening, the control curing time is 0.5 hour ~ 24 hours, prepare pitchy or yellowish-brown water processes with Pericarpium Musae high-molecular coagulant adopting fluid product；
(5) adopting reverse contact spray drying method or naturally dry method or freezing method by aforesaid liquid product solidification, in reverse contact spray drying method, hot air flowrate is 300m3/h~550m3/ h, hot-air inlets temperature is 100 DEG C ~ 105 DEG C, is naturally drying in method, above-mentioned water process Pericarpium Musae high-molecular coagulant adopting fluid product is naturally dried, pulverizes, in freezing method, cryogenic temperature controls, for-40 DEG C ~-10 DEG C, to make drabon color or khaki Powdered solid product。
Present invention have the advantage that
1, the present invention is with Pericarpium Musae and water for primary raw material, and with technical grade sodium hydroxide and technical grade sodium hypochlorite for auxiliary material, wherein the addition of sodium hydroxide is relatively low, reduces preparation cost。
2, the water of the present invention processes and adopts " water at low temperature lifting manipulation " by the technology of preparing of Pericarpium Musae high-molecular coagulant adopting, and carry out further alkali propose the poly-reaction of alkali by adding a small amount of sodium hydroxide, production process is normal pressure, it is 30 DEG C ~ 50 DEG C that temperature of reaction kettle requires, energy consumption is low, production process non-secondary pollution, produces equipment and technical process is simple, economic, practical, realizes very well。
3, in the water process Pericarpium Musae high-molecular coagulant adopting of the present invention, the addition of sodium hydroxide is relatively low, and the pH value of water outlet is within the scope of neutrality or alkalescence, it is not necessary to additional acid, to reduce the pH value of water outlet, reduces cost of water treatment。
4, water process Pericarpium Musae high-molecular coagulant adopting is had the dual function extending storage time and raising depollution effect by the sodium hypochlorite added in the present invention。
5, water process Pericarpium Musae high-molecular coagulant adopting is had antisepsis by the Kazon added in the present invention, extends the storage time preferably。
6, the water process Pericarpium Musae high-molecular coagulant adopting of the present invention can be applicable to the fields such as drinking water, municipal sewage, industrial wastewater。
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail。
Embodiment 1
Pericarpium Musae is dried, and is ground into Powdered。Under the mixing speed of 150 revs/min ~ 300 revs/min, the water of the 95L of 30 DEG C is joined in the Powdered Pericarpium Musae of 2Kg, stir 1 minute, then continuous heating 2 hours at the temperature of 30 DEG C, obtain extracting mixed liquor, standby。When the mixing speeds of 300 revs/min ~ 800 revs/min and temperature are 30 DEG C, the sodium hydroxide solution that the mass fraction of 0.1L is 20% is joined in said extracted mixed liquor, stir 10 minutes, obtain the poly-liquid of alkali, stop stirring, left at room temperature ripening, the control curing time is 0.5 hour, prepares pitchy water and processes with Pericarpium Musae high-molecular coagulant adopting fluid product。
Embodiment 2
Pericarpium Musae is dried, and is ground into Powdered。Under the mixing speed of 150 revs/min ~ 300 revs/min, the water of the 300L of 50 DEG C is joined in the Powdered Pericarpium Musae of 40Kg, stir 3 minutes, then continuous heating 4 hours at the temperature of 50 DEG C, obtain extracting mixed liquor, standby。When the mixing speeds of 300 revs/min ~ 800 revs/min and temperature are 50 DEG C, the sodium hydroxide solution that the mass fraction of 4L is 30% is joined in said extracted mixed liquor, stir 15 minutes, obtain the poly-liquid of alkali, standby。When the mixing speeds of 150 revs/min ~ 350 revs/min and temperature are 50 DEG C, the liquor natrii hypochloritis that the mass fraction of 3L is 10% is joined in the poly-liquid of above-mentioned alkali, stir 3 minutes, obtain the poly-distiller liquor of alkali, stop stirring, left at room temperature ripening, the control curing time is 24 hours, prepares yellowish-brown water and processes with Pericarpium Musae high-molecular coagulant adopting fluid product。
Embodiment 3
Pericarpium Musae is dried, and is ground into Powdered。Under the mixing speed of 150 revs/min ~ 300 revs/min, the water of the 210L of 50 DEG C is joined in the Powdered Pericarpium Musae of 20Kg, stir 5 minutes, then continuous heating 3.5 hours at the temperature of 50 DEG C, obtain extracting mixed liquor, standby。When the mixing speeds of 300 revs/min ~ 800 revs/min and temperature are 50 DEG C, the sodium hydroxide solution that the mass fraction of 4L is 40% is joined in said extracted mixed liquor, stir 25 minutes, obtain the poly-liquid of alkali, standby。When the mixing speeds of 150 revs/min ~ 350 revs/min and temperature are 50 DEG C, the liquor natrii hypochloritis that the mass fraction of 5L is 10% is joined in the poly-liquid of above-mentioned alkali, stir 10 minutes, obtain the poly-distiller liquor of alkali, then when the mixing speed of 150 revs/min ~ 350 revs/min and temperature are 50 DEG C, the Kazon solution that the mass fraction of the active component of 0.01L is 14% is joined in the poly-distiller liquor of above-mentioned alkali, stir 3 minutes, stop stirring, left at room temperature ripening, the control curing time is 24 hours, prepare yellowish-brown water to process with Pericarpium Musae high-molecular coagulant adopting fluid product。
Embodiment 4
Pericarpium Musae is dried, and is ground into Powdered。Under the mixing speed of 150 revs/min ~ 300 revs/min, the water of the 95L of 30 DEG C is joined in the Powdered Pericarpium Musae of 2Kg, stir 1 minute, then continuous heating 2 hours at the temperature of 30 DEG C, obtain extracting mixed liquor, standby。When the mixing speeds of 300 revs/min ~ 800 revs/min and temperature are 30 DEG C, the sodium hydroxide solution that the mass fraction of 0.1L is 20% is joined in said extracted mixed liquor, stir 10 minutes, obtain the poly-liquid of alkali, stop stirring, left at room temperature ripening, the control curing time is 0.5 hour, prepares pitchy water and processes with Pericarpium Musae high-molecular coagulant adopting fluid product。Adopting reverse contact spray drying method by aforesaid liquid product solidification, hot air flowrate is 450m3/ h, hot-air inlets temperature is 100 DEG C ~ 105 DEG C, makes drab Powdered solid product。
Embodiment 5
Pericarpium Musae is dried, and is ground into Powdered。Under the mixing speed of 150 revs/min ~ 300 revs/min, the water of the 300L of 50 DEG C is joined in the Powdered Pericarpium Musae of 40Kg, stir 3 minutes, then continuous heating 4 hours at the temperature of 50 DEG C, obtain extracting mixed liquor, standby。When the mixing speeds of 300 revs/min ~ 800 revs/min and temperature are 50 DEG C, the sodium hydroxide solution that the mass fraction of 4L is 30% is joined in said extracted mixed liquor, stir 15 minutes, obtain the poly-liquid of alkali, standby。When the mixing speeds of 150 revs/min ~ 350 revs/min and temperature are 50 DEG C, the liquor natrii hypochloritis that the mass fraction of 3L is 10% is joined in the poly-liquid of above-mentioned alkali, stir 3 minutes, obtain the poly-distiller liquor of alkali, stop stirring, left at room temperature ripening, the control curing time is 24 hours, prepares yellowish-brown water and processes with Pericarpium Musae high-molecular coagulant adopting fluid product。Adopt nature to dry method by aforesaid liquid product solidification, above-mentioned water process Pericarpium Musae high-molecular coagulant adopting fluid product is naturally dried, pulverizes, makes khaki Powdered solid product。
Embodiment 6
Pericarpium Musae is dried, and is ground into Powdered。Under the mixing speed of 150 revs/min ~ 300 revs/min, the water of the 210L of 50 DEG C is joined in the Powdered Pericarpium Musae of 20Kg, stir 5 minutes, then continuous heating 3.5 hours at the temperature of 50 DEG C, obtain extracting mixed liquor, standby。When the mixing speeds of 300 revs/min ~ 800 revs/min and temperature are 50 DEG C, the sodium hydroxide solution that the mass fraction of 4L is 40% is joined in said extracted mixed liquor, stir 25 minutes, obtain the poly-liquid of alkali, standby。When the mixing speeds of 150 revs/min ~ 350 revs/min and temperature are 50 DEG C, the liquor natrii hypochloritis that the mass fraction of 5L is 10% is joined in the poly-liquid of above-mentioned alkali, stir 10 minutes, obtain the poly-distiller liquor of alkali, then when the mixing speed of 150 revs/min ~ 350 revs/min and temperature are 50 DEG C, the Kazon solution that the mass fraction of the active component of 0.01L is 14% is joined in the poly-distiller liquor of above-mentioned alkali, stir 3 minutes, stop stirring, left at room temperature ripening, the control curing time is 24 hours, prepare yellowish-brown water to process with Pericarpium Musae high-molecular coagulant adopting fluid product。Adopting freezing method by aforesaid liquid product solidification, cryogenic temperature controls, for-30 DEG C, to make khaki Powdered solid product。
Application example 1
The coagulating treatment of the simulated water sample that No.1,2,3 water process Pericarpium Musae high-molecular coagulant adopting product above example 1,2,3 prepared and polymeric ferric aluminum (PAF) are prepared with humic acids for Kaolin。Raw water turbidity is 83 ~ 118NTU, and pH value is 8.71 ~ 8.77, and colourity is 0.376 ~ 0.481CU, and water temperature is 15 DEG C。Result is listed in table 1, table 2。
Table 1 water processes the contrast with Pericarpium Musae high-molecular coagulant adopting with PAF coagulation effect, and dosage is 1mL
Table 2 water processes the contrast with Pericarpium Musae high-molecular coagulant adopting with PAF coagulation effect, and dosage is 2mL
From above result, compared with polymeric ferric aluminum (PAF), water process Pericarpium Musae high-molecular coagulant adopting has more excellent turbidity removal, except color performance。
Application example 2
The coagulating treatment of the simulated water sample that No.1,2,3 water process Pericarpium Musae high-molecular coagulant adopting product above example 1,2,3 prepared and polymeric ferric aluminum (PAF) are prepared with heavy metal for Kaolin。Raw water turbidity is 25 ~ 43NTU, and pH value is 7.92 ~ 8.04, Pb2+For 0.5mg/L, water temperature is 15 DEG C。Result is listed in table 3。
Table 3 water processes removes Pb with Pericarpium Musae high-molecular coagulant adopting with PAF coagulation2+Contrast, dosage is 2mL
From above result, compared with polymeric ferric aluminum (PAF), water process Pericarpium Musae high-molecular coagulant adopting has more excellent Pb2+Removal capacity。
Claims (4)
1. a water processes by the technology of preparing of Pericarpium Musae high-molecular coagulant adopting, it is characterised in that be specifically related to the step of following order, and component and the content of water process Pericarpium Musae high-molecular coagulant adopting is:
Pericarpium Musae 1.5% ~ 15%
Water 79% ~ 98%
Mass fraction is the sodium hydroxide solution 0.08% ~ 3.5% of 15% ~ 45%
Mass fraction is the liquor natrii hypochloritis 0% ~ 3.5% of 10% ~ 13%
Stabilizer 0% ~ 0.015%,
All percents are weight percentage；The technology of preparing that above-mentioned each component is made water process Pericarpium Musae high-molecular coagulant adopting of the present invention is " water at low temperature lifting manipulation ", and concrete scheme is as follows:
(1) Pericarpium Musae is dried, and be ground into Powdered；
(2) under the mixing speed of 150 revs/min ~ 300 revs/min, water by the 79% ~ 98% of 30 DEG C ~ 50 DEG C joins in the Powdered Pericarpium Musae of 1.5% ~ 15%, stirs 1 minute ~ 5 minutes, then continuous heating 1 hour ~ 4 hours at the temperature of 30 DEG C ~ 50 DEG C, obtain extracting mixed liquor, standby；
(3) when the mixing speed of 300 revs/min ~ 800 revs/min and temperature are 30 DEG C ~ 50 DEG C, mass fraction by 0.08% ~ 3.5% be 15% ~ 45% sodium hydroxide solution join in said extracted mixed liquor, stir 10 minutes ~ 25 minutes, obtain the poly-liquid of alkali, standby；
(4) when the mixing speed of 150 revs/min ~ 350 revs/min and temperature are 30 DEG C ~ 50 DEG C, mass fraction by 0% ~ 3.5% be 10% ~ 13% liquor natrii hypochloritis join in the poly-liquid of above-mentioned alkali, stir 3 minutes ~ 10 minutes, obtain the poly-distiller liquor of alkali, then when the mixing speed of 150 revs/min ~ 350 revs/min and temperature are 30 DEG C ~ 50 DEG C, the mass fraction of the active component by 0% ~ 0.015% be 14% ~ 15% Kazon solution join in the poly-distiller liquor of above-mentioned alkali, stir 3 minutes ~ 10 minutes, stop stirring, left at room temperature ripening, the control curing time is 0.5 hour ~ 24 hours, prepare pitchy or yellowish-brown water processes with Pericarpium Musae high-molecular coagulant adopting fluid product；
(5) adopting reverse contact spray drying method or naturally dry method or freezing method by aforesaid liquid product solidification, in reverse contact spray drying method, hot air flowrate is 300m3/h~550m3/ h, hot-air inlets temperature is 100 DEG C ~ 105 DEG C, is naturally drying in method, above-mentioned water process Pericarpium Musae high-molecular coagulant adopting fluid product is naturally dried, pulverizes, in freezing method, cryogenic temperature controls, for-40 DEG C ~-10 DEG C, to make drabon color or khaki Powdered solid product。
2. the technology of preparing of water process Pericarpium Musae high-molecular coagulant adopting according to claim 1, it is characterized in that the Kazon solution that mass fraction is 14% ~ 15% that stabilizer used is active component, technical grade product, water process Pericarpium Musae high-molecular coagulant adopting is had antisepsis by the Kazon solution added, and extends the storage time preferably。
3. the technology of preparing of water process Pericarpium Musae high-molecular coagulant adopting according to claim 1, it is characterized in that adopting " water at low temperature lifting manipulation ", and carry out further alkali propose the poly-reaction of alkali by adding a small amount of sodium hydroxide, production process is normal pressure, it is 30 DEG C ~ 50 DEG C that temperature of reaction kettle requires, energy consumption is low, production process non-secondary pollution。
4. the technology of preparing of water process Pericarpium Musae high-molecular coagulant adopting according to claim 1, it is characterized in that the addition of sodium hydroxide solution is relatively low, the pH value of water outlet is within the scope of neutrality or alkalescence, it is not necessary to additional acid, to reduce the pH value of water outlet, reduces cost of water treatment。
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| CN106219715A (en) * | 2016-09-20 | 2016-12-14 | 济南大学 | A kind of preparation method of oxidation modification Pericarpium Musae coagulant |
| CN106830255A (en) * | 2017-03-03 | 2017-06-13 | 济南大学 | A kind of coagulation process of the banana skin water treatment agent without mixed process |
| CN107416986A (en) * | 2017-09-05 | 2017-12-01 | 济南大学 | A kind of preparation method of natural polymer organic matter microorganism integral type coagulant |
| CN108128869A (en) * | 2018-01-19 | 2018-06-08 | 济南大学 | The preparation method of one specific admixture fruit peel-microorganism integral type coagulant |
| CN112551667A (en) * | 2020-11-13 | 2021-03-26 | 济南大学 | Preparation technology of natural polymer type pineapple peel residue coagulant |
| CN114804330A (en) * | 2022-05-30 | 2022-07-29 | 水发规划设计有限公司 | Application method of pericarp coagulant of low-carbon-source sewage with external carbon source |
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| CN108128869A (en) * | 2018-01-19 | 2018-06-08 | 济南大学 | The preparation method of one specific admixture fruit peel-microorganism integral type coagulant |
| CN112551667A (en) * | 2020-11-13 | 2021-03-26 | 济南大学 | Preparation technology of natural polymer type pineapple peel residue coagulant |
| CN114804330A (en) * | 2022-05-30 | 2022-07-29 | 水发规划设计有限公司 | Application method of pericarp coagulant of low-carbon-source sewage with external carbon source |
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