CN110255685A

CN110255685A - A kind of flocculant and preparation method thereof administered for black and odorous water

Info

Publication number: CN110255685A
Application number: CN201910515872.4A
Authority: CN
Inventors: 蔺爱国; 袁鹏; 尚修宇; 王玉环; 丁兴华; 马莹莹; 贺彦涛; 孙剑珍; 申美荣
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2019-09-20

Abstract

The flocculant and preparation method thereof that the invention discloses a kind of to administer for black and odorous water, including following weight form number: 5-10 parts of amphiprotic polyacrylamide, 60-75 parts of aluminium polychloride, 10-20 parts of chitosan, 15-35 parts of acrylamide graft starch, 50-65 parts of bodied ferric sulfate, 10-25 parts of active carbon, 1-5 parts of oxidant.It is good, at low cost, environmentally friendly that the beneficial effects of the invention are as follows removal effects.

Description

A kind of flocculant and preparation method thereof administered for black and odorous water

Technical field

The invention belongs to water-treatment technology field, it is related to a kind of flocculant efficiently administered for black and odorous water and its preparation Method.

Background technique

Flocculant precipitating is at present using the method for more processing industrial wastewater, by the way that flocculant is added in waste water Suspended matter and deliquescent biochemical oxygen demand object (COD), biological oxygen consumption object (BOD) can be effectively removed, so that it is dirty to reach purification The purpose of water.High polymer coagulant is broadly divided into inorganic polymer flocculant, such as poly-aluminium, Polyferric Sulfate at present；Natural polymer wadding Solidifying agent, such as chitin, modified starch；Synthetic polymeric flocculant, such as polyacrylamide.Due to polyacrylamide price compared with Height, thus come year in year out it is many improve both for how modified polyacrylamide, or it is multiple using the compound preparation of a variety of flocculants Close flocculant.But the wastewater treatment efficiency of existing composite flocculation agent is unsatisfactory, and use process is complicated.In addition there are The defects of a part of flocculant, that there is also prices is high, not degradable, pollution environment due to used raw material itself.

Summary of the invention

The flocculant and preparation method thereof that the purpose of the present invention is to provide a kind of to administer for black and odorous water, it is of the invention Beneficial effect is that removal effect is good, at low cost, environmentally friendly.

The technical scheme adopted by the invention is that including that following weight forms number: 5-10 parts of amphiprotic polyacrylamide gathers Close aluminium chloride 60-75 parts, 10-20 parts of chitosan, 15-35 parts of acrylamide graft starch, 50-65 parts of bodied ferric sulfate, activity 10-25 parts of charcoal, 1-5 parts of oxidant.

Further, amphiprotic polyacrylamide is 5 parts, and the aluminium polychloride is 60 parts, and the chitosan is 10 parts, described Acrylamide graft starch is 15 parts, and the bodied ferric sulfate is 50 parts, and the active carbon is 10 parts, and the oxidant is 1 part.

Further, amphiprotic polyacrylamide is 10 parts, and the aluminium polychloride is 75 parts, and 20 parts of the chitosan is described Acrylamide graft starch is 35 parts, and the bodied ferric sulfate is 65 parts, and the active carbon is 25 parts, and the oxidant is 5 parts.

Further, the preparation method following steps for the flocculant efficiently administered for black and odorous water:

1) active carbon and chitosan are crushed, after alkali modification, cleaning, drying obtains aggregate；

2) amphiprotic polyacrylamide, aluminium polychloride, acrylamide graft starch, bodied ferric sulfate are mixed with oxidant Uniformly, additive is obtained；

3) aggregate and additive are stirred under the conditions of 60 DEG C, it is small then heats to 100--120 DEG C of reaction 2--3 When, discharging of being sieved after cooling.

Further, the flocculant is put into black and odorous water, 3min is stirred with 300r/min, then stir with 200r/min 8min stands 20min.

Detailed description of the invention

Fig. 1 is COD variation tendency schematic diagram in black and odorous water；

Fig. 2 is BOD variation tendency schematic diagram in black and odorous water.

Specific embodiment

The present invention is described in detail With reference to embodiment.

Experimental water: acquisition black and odorous water river.Take mono layer gauze filtering removal large volume floating material and suspended matter, experiment Water sample is 500mL/ bottles, stands 1 hour after water is added, spare.

Embodiment one

Weight forms number: amphiprotic polyacrylamide is 5 parts, and aluminium polychloride is 60 parts, and chitosan is 10 parts, acryloyl Amine graft starch is 15 parts, and bodied ferric sulfate is 50 parts, and active carbon is 10 parts, and oxidant is that 1 part of flocculant is added to the water, will Active carbon and chitosan crush, and after alkali modification, cleaning, drying obtains aggregate；By amphiprotic polyacrylamide, aluminium polychloride, propylene Acid amide-grafted starch, bodied ferric sulfate are uniformly mixed with oxidant, obtain additive；By aggregate and additive under the conditions of 60 DEG C It is stirred, then heats to 100 DEG C and react 2 hours, discharging of being sieved after cooling.In for 24 hours, 48h and 72h detection water in COD and BOD content.Measure of merit is as shown in table 1:

Table 1

Embodiment one	COD removal rate (%)	BOD removal rate (%)
			24h	80.4	78.9
48h	91.4	85.2
			72h	93.2	93.4

Embodiment two

By the component of following part: amphiprotic polyacrylamide is 10 parts, and aluminium polychloride is 75 parts, and chitosan is 20 parts, third Acrylamide graft starch is 35 parts, and bodied ferric sulfate is 65 parts, and active carbon is 25 parts, and water is added in the flocculant that oxidant is 5 parts In, active carbon and chitosan are crushed, after alkali modification, cleaning, drying obtains aggregate；By amphiprotic polyacrylamide, polyaluminium Aluminium, acrylamide graft starch, bodied ferric sulfate are uniformly mixed with oxidant, obtain additive；By aggregate and additive 60 It is stirred under the conditions of DEG C, then heats to 120 DEG C and react 3 hours, discharging of being sieved after cooling.In for 24 hours, 48h and 72h detect water Middle COD and BOD content.Measure of merit is as shown in table 2:

Table 2

Embodiment two	COD removal rate (%)	BOD removal rate (%)
			24h	84.8	82.4
48h	92.8	91.5
			72h	97.5	96.1

Embodiment three

By the component of following part: amphiprotic polyacrylamide is 7 parts, and aluminium polychloride is 70 parts, and chitosan is 15 parts, propylene Acid amide-grafted starch is 30 parts, and bodied ferric sulfate is 60 parts, and active carbon is 20 parts, and oxidant is that 3 parts of flocculant is added to the water, Active carbon and chitosan are crushed, after alkali modification, cleaning, drying obtains aggregate；By amphiprotic polyacrylamide, aluminium polychloride, third Acrylamide graft starch, bodied ferric sulfate are uniformly mixed with oxidant, obtain additive；By aggregate and additive in 60 DEG C of conditions Under be stirred, then heat to 110 DEG C and react 2.5 hours, discharging of being sieved after cooling.In for 24 hours, in 48h and 72h detection water COD and BOD content.Measure of merit is as shown in table 3:

Table 3

Embodiment three	COD removal rate (%)	BOD removal rate (%)
			24h	82.6	80.4
48h	92.1	87.5
			72h	94.6	95.1

Fig. 1 is COD variation tendency schematic diagram in black and odorous water；Fig. 2 is BOD variation tendency schematic diagram in black and odorous water.Knot Close state data it is found that technical solution of the present invention removal of the flocculant efficiently administered for black and odorous water to black and odorous water Ability is substantially better than the removal ability of existing flocculant process black and odorous water, has COD, BOD removal effect compared with prior art The advantages that fruit is good, at low cost, environmentally friendly, while meeting the not black not smelly standard of water body after black and odorous water processing.

The above is only not to make limit in any form to the present invention to better embodiment of the invention System, any simple modification that embodiment of above is made according to the technical essence of the invention, equivalent variations and modification, Belong in the range of technical solution of the present invention.

Claims

1. a kind of flocculant administered for black and odorous water, it is characterised in that form number: both sexes polypropylene including following weight 5-10 parts of amide, 60-75 parts of aluminium polychloride, 10-20 parts of chitosan, 15-35 parts of acrylamide graft starch, bodied ferric sulfate 50-65 parts, 10-25 parts of active carbon, 1-5 parts of oxidant.

2. a kind of flocculant administered for black and odorous water according to claim 1, it is characterised in that: the both sexes polypropylene Amide is 5 parts, and the aluminium polychloride is 60 parts, and the chitosan is 10 parts, and the acrylamide graft starch is 15 parts, institute Stating bodied ferric sulfate is 50 parts, and the active carbon is 10 parts, and the oxidant is 1 part.

3. the flocculant according to claim 1 efficiently administered for black and odorous water, which is characterized in that the both sexes poly- third Acrylamide is 10 parts, and the aluminium polychloride is 75 parts, 20 parts of the chitosan, and the acrylamide graft starch is 35 parts, The bodied ferric sulfate is 65 parts, and the active carbon is 25 parts, and the oxidant is 5 parts.

4. the preparation method for the flocculant efficiently administered described in -3 any one for black and odorous water according to claim 1, feature It is to include the following steps:

2) amphiprotic polyacrylamide, aluminium polychloride, acrylamide graft starch, bodied ferric sulfate are mixed with oxidant It is even, obtain additive；

3) aggregate and additive are stirred under the conditions of 60 DEG C, then heat to 100--120 DEG C of reaction 2--3 hours, it is cold But sieving discharging afterwards.

5. the flocculant efficiently administered described in -3 any one for black and odorous water according to claim 1, it is characterised in that: will be described Flocculant is put into black and odorous water, is stirred 3min with 300r/min, then stir 8min with 200r/min, is stood 20min.