Multi-functional composite bioflocculant for wastewater treatment

The technology of biological flocculant and microbial flocculant is applied in the field of multifunctional composite biological flocculant for wastewater treatment, which can solve the problems of shortening the acclimation period of activated sludge, inability to provide trace elements, and difficulty in separation and purification, so as to improve the activity of microorganisms. , easy to produce, widely applicable effect

Inactive Publication Date: 2012-07-11
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain problems in the use of pure biological flocculants: (1) high cost; (2) difficult to separate and purify; (3) cannot provide trace elements for subsequent biochemical treatment; (4) used alone to treat industrial Poor adaptability to wastewater
[0004] It can not only pretreat wastewater (including industrial wastewater) efficiently, cheaply and adaptably, but also provide trace elements to ensure the normal operation of industrial wastewater biochemical treatment system, so as to shorten the domestication cycle of activated sludge and make industrial wastewater treatment run stably. Composite flocculants have not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In percent by weight, polyaluminum chloride (PAC) 15%, ferrous sulfate 15%, sodium hydrogen phosphate 10%, magnesium sulfate 5%, potassium chloride 2%, zinc chloride 2%, calcium carbonate 1%, Grinding into fine particles by a pulverizer, passing through a sieve greater than or equal to 20 mesh, stirring and mixing in proportion under normal temperature and pressure conditions, and then uniformly mixing with the prepared microbial flocculant in a weight ratio of 1:1, and drying at 50°C dry to obtain the finished product of the multifunctional composite biological flocculant for waste water treatment.

[0023] The above-mentioned microbial flocculant is sieved by the membrane surface fouling flora (the mixed flora of active Nitrobacter sp. and Pseudomonas sp., accounting for 30% and 70% of the total weight) in the submerged membrane bioreactor. The high-efficiency flocculant-producing bacteria are inoculated into the general fermentation medium, cultured in a shaker at 25...

Embodiment 2

[0027] In percent by weight, polyaluminum chloride (PAC) 15%, ferrous sulfate 20%, sodium hydrogen phosphate 5%, magnesium sulfate 5%, potassium chloride 2%, zinc chloride 2%, calcium carbonate 1%, It is crushed into fine particles by a pulverizer, passed through a sieve greater than or equal to 20 meshes, stirred and mixed in proportion under normal temperature and pressure conditions, and then evenly mixed with microbial flocculants in a weight ratio of 1:1, and then dried at 50°C. Get the finished product.

[0028] The above-mentioned microbial flocculant is sieved by the membrane surface fouling flora (the mixed flora of active Nitrobacter sp. and Pseudomonas sp., accounting for 50% and 50% of the total weight) in the submerged membrane bioreactor. The high-efficiency flocculant-producing bacteria are inoculated into the general fermentation medium, cultured in a shaker at 25-30°C, 150-170r / min for 2-3 days, and then the fermentation broth is centrifuged at 4000-6000r / min ...

Embodiment 3

[0032] By weight percentage, get polyaluminum chloride (PAC) 30%, ferrous sulfate 5%, sodium hydrogen phosphate 5%, magnesium sulfate 5%, potassium chloride 2%, zinc chloride 2%, calcium carbonate 1%, It is crushed into fine particles by a pulverizer, passed through a sieve greater than or equal to 20 meshes, stirred and mixed in proportion under normal temperature and pressure conditions, and then evenly mixed with microbial flocculants at a weight ratio of 1:1, and then dried at 50°C. Get the finished product.

[0033] The microbial flocculant is screened out from the membrane surface fouling flora in the submerged membrane bioreactor (the mixed flora of Nitrobacter sp. and Pseudomonas sp., accounting for 70% and 30% of the total weight respectively) The high-efficiency flocculant-producing bacteria were inoculated into the general fermentation medium, cultured in a shaker at 25°C-30°C, 150-170r / min for 2-3 days, and then the fermentation broth was centrifuged at 4000-6000r / ...

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Abstract

The invention discloses a multi-functional composite bioflocculant for wastewater treatment. The composite bioflocculant is prepared from the following raw materials in percentage by weight: 15 to 30 percent of aluminum polychlorid, 5 to 20 percent of ferrous sulfate, 5 to 20 percent of sodium hydrogen phosphate, 5 to 10 percent of magnesium sulfate, 2 to 5 percent of potassium chloride, 2 to 5 percent of zinc chloride, 1 to 2 percent of calcium carbonate and 50 percent of microbial flocculant. The composite bioflocculant has the characteristics of high-efficiency flocculation, easiness for microbial degradation and environment friendliness, also has certain microbial growth factors, and can be used for the growth and succession of microorganisms in the subsequent biochemical treatment process of wastewater as well as quick and mass propagation in severe environments, accelerate biochemical reaction and improve the treatment effect of biochemical systems.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a multifunctional composite biological flocculant for wastewater treatment. Background technique [0002] Today's environmental pollution is becoming more and more serious, and water pollution is even more related to the national economy and people's livelihood. The country is also paying more and more attention to the prevention and control measures of water pollution. Scientists and engineers have successively developed various water treatment methods. In various sewage treatment technologies, especially in industrial sewage treatment, the method of using coagulant and flocculant as pretreatment has been widely recognized by people. At present, most of the flocculants used in my country are mainly organic polymer flocculants (such as polyacrylamide, etc.) and inorganic flocculants (such as aluminum salts, iron salts, etc.). These two types of floccul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 郭冀峰刘珊关卫省陈花果宋优男
Owner CHANGAN UNIV
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