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Safety and ecological natural built-up flocculant, its production and use

An ecological safety and flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems that are difficult to meet the requirements of practical applications, high cost of MSG sewage treatment, unsatisfactory flocculation effect, etc., to improve ecological security, Reduce secondary pollution, good ecological security

Inactive Publication Date: 2007-06-13
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the Department of Chemistry of Shenzhen University used inorganic flocculants such as basic aluminum chloride, ferrous sulfate, ferric chloride and calcium hydroxide to study the flocculation of glutamic acid fermentation broth. The results showed that simple inorganic flocculants, Even with coagulation aids, the flocculation effect is not ideal, and it is difficult to meet the requirements of practical applications
2) Organic flocculants are generally better than inorganic flocculants, but different types of flocculants have different requirements for operating conditions, and the flocculation effects are also different
Among them, the anaerobic biological treatment method is a biological treatment method that decomposes organic matter in wastewater with the help of facultative anaerobic bacteria and obligate anaerobic bacteria in the absence of oxygen. Its advantages are: low energy consumption, Bioenergy (biogas) can be recovered, the amount of microorganisms (sludge) produced per unit weight of substrate removed is small, and it has the potential for higher organic matter load; the main disadvantages include: the COD value of the effluent after treatment is high, and after treatment effluent SO 4 2- The value is higher, the hydraulic retention time is longer, and odor is generated, causing secondary pollution
The current research focus is on the high cost of MSG sewage treatment, which is easy to cause secondary pollution. Considering the ecological safety and applicability, it is necessary to develop a flocculant with high efficiency, economy and good ecological safety performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The invention provides a preparation method of a novel ecologically safe compound flocculant, comprising the following steps:

[0037] 1. Select one or more of the above-mentioned natural materials containing silicates as the main body and mix them.

[0038] 2. Screening, drying, and grinding the natural materials mainly containing silicates into granules with a particle size of 1-200 meshes for later use.

[0039] 3. Select one or more of inorganic iron salts such as polyferric chloride and polyferric sulfate for mixing.

[0040] 4. Select alkaline substances: calcium hydroxide, calcium chloride, sodium hydroxide, limestone, gypsum, etc. or one or more of them to mix.

[0041] Instructions:

[0042] (1) Adjust the pH value of the monosodium glutamate sewage between 4-7 with the selected alkaline substance.

[0043] (2) According to different water quality, natural materials are directly added in powder form according to the specified quantity. The standard addition...

Embodiment 1

[0049] The invention uses black soil, polyferric sulfate and calcium chloride as raw materials. Among them, black soil is the main component, polyferric sulfate is the auxiliary flocculant, and calcium chloride is the pH regulator and flocculant aid. The mass ratio of black soil to polyferric sulfate is 20:1.

[0050] Its preparation method is:

[0051] (1) Adjust the pH value of monosodium glutamate sewage to about 6.0 with calcium chloride.

[0052] (2) Add the prepared black soil into the sewage on the basis of 30% of the chemical oxygen demand (COD) of the sewage, and perform rapid stirring for about 5 minutes (80-140 rpm).

[0053] (3) Add polyferric sulfate.

[0054] (4) First stir rapidly (80-140 rpm) for 3 minutes, then stir at medium speed (40-80 rpm) for 10 minutes, then stir slowly (10-40 rpm) for 15 minutes, and then let it settle for 45 minutes.

[0055] (5) After settling for 45 minutes, take the supernatant to measure the turbidity.

[0056] Using Example 1...

Embodiment 2

[0058] The difference from Example 1 is that the raw material is mainly composed of brown soil, and polyferric chloride is used instead of polyferric sulfate.

[0059] Its preparation method is:

[0060] (1) Adjust the pH value of monosodium glutamate sewage to about 4.0 with calcium chloride.

[0061] (2) Add the prepared brown soil into the sewage on the basis of 25% of the chemical oxygen demand (COD) of the sewage, and perform rapid stirring (about 5 minutes).

[0062] (3) Add polyferric chloride.

[0063] (4) First stir rapidly (80-140 rpm) for 3 minutes, then stir at medium speed (40-80 rpm) for 10 minutes, then stir slowly (10-40 rpm) for 15 minutes, and then let it settle for 45 minutes.

[0064] (5) After settling for 45 minutes, take the supernatant to measure the turbidity.

[0065] Using Example 2 of the present invention to treat monosodium glutamate sewage, the turbidity removal rate is 92.13%. Under the same conditions, the removal rate of turbidity is only ...

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Abstract

A safe ecological natural built flocculant, its preparing and using method are disclosed. The built flocculant consists of natural materials containing silicate, black soil, brown soil and red soil. The using method is carried out by adding alkali substances into glutamate waste water to adjust pH value, adding into natural materials containing silicate, agitating fast, flocculating complex preparing, adding into inorganic molysite and auxiliary flocculating. It has high efficiency, better ecological safety and no second environmental pollution.

Description

technical field [0001] The invention relates to a novel flocculant with maximum ecological safety performance and its compounding method, and its application in the treatment of monosodium glutamate and other high-concentration organic waste water; in addition, it can also be applied to urban water supply. Background technique [0002] Monosodium glutamate wastewater is a kind of high concentration organic wastewater, its COD is as high as 10000-80000mg·L -1 , and has the characteristics of high ammonium nitrogen, high sulfate radicals, and low pH value. There has been no good treatment method, and it is one of the current water treatment problems. There are currently 94 monosodium glutamate factories in my country, with an output of 631,284 tons in 1997, more than half of the world's output. However, every 1t of monosodium glutamate produced will produce 25-30m 3 high-concentration organic wastewater. According to statistics, more than 100 million tons of high-concentrat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 刘睿周启星张兰英
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI