CN103387315A - Process for treating sewage by virtue of combined technology of pretreatment and two stages of aeration - Google Patents
Process for treating sewage by virtue of combined technology of pretreatment and two stages of aeration Download PDFInfo
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- CN103387315A CN103387315A CN2013103234270A CN201310323427A CN103387315A CN 103387315 A CN103387315 A CN 103387315A CN 2013103234270 A CN2013103234270 A CN 2013103234270A CN 201310323427 A CN201310323427 A CN 201310323427A CN 103387315 A CN103387315 A CN 103387315A
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Abstract
The invention discloses a process for treating sewage by virtue of a combined technology of pretreatment and two stages of aeration. The process comprises the following steps of: firstly carrying out precipitation pretreatment on sewage through a dosing coagulative precipitation tank, then feeding the sewage subjected to precipitation and separation in pretreatment into a first aeration tank and aerating the sewage; feeding the sewage (which is aerated in the first aeration tank) into a first precipitation tank and precipitating; returning sludge obtained through precipitation back to the first aeration tank through a first sludge return pipe, meanwhile feeding an upper liquid, which is obtained after the sewage is precipitated and separated in the first precipitation tank, into a second aeration tank and aerating; feeding the liquid which is aerated in the second aeration tank into the second precipitation tank and precipitating; returning the precipitated sludge back to the second aeration tank through a second sludge return pipe and discharging out water, which is obtained after the sewage is precipitated and separated in the second precipitation tank, from a water outlet. According to the process for treating sewage by virtue of the combined technology of pretreatment and two stages of aeration, the first aeration system and the second aeration system are matched for use, stress of sewage treatment of the pretreatment stage and the second aeration system is reduced and the COD (chemical oxygen demand) of discharged water after treatment is lowered obviously.
Description
Technical field
The present invention relates to the treatment process of sewage, relate in particular to pre-treatment and the two sections aeration type combination techniques treatment process to sewage.
Background technology
Dyeing is the annual technique softening water that needs nearly hundred million tons of consumption of typical high water consumption industry.Dyeing waste water source and pollutant component are very complicated, have the characteristics such as change of water quality is large, organic content is high, colourity high (being mainly coloured dyestuff), and directly discharging brings very big harm to human health and living environment, causes simultaneously the waste of water resources.To the pay attention to day by day of environmental protection requirement with to the requirement of Sustainable development, traditional treatment process more and more is difficult to meet produces and the requirement of environmental protection along with country and society.And COD of the conventional rear water outlet of its processing of dyeing and printing sewage treatment process is higher at present, thereby can not reach the emission request of waste water.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide pre-treatment and the two sections aeration type combination techniques treatment process to sewage, by being used in conjunction with of the first aerating system and the second aerating system, alleviating pretreatment stage and the second aerating system processing pressure for sewage, the water outlet COD after processing is obviously descended.
The present invention is the purpose that reaches above-mentioned, and the present invention adopts following technical scheme:
Pre-treatment and the two sections aeration type combination techniques treatment process to sewage, comprise the steps: at first sewage to be precipitated pre-treatment by the dosing coagulative precipitation tank, then with the input of the sewage after the pre-treatment precipitate and separate the first aeration tank aeration; Then with the input of the sewage by the first aeration tank aeration the first settling tank precipitation, the mud after precipitation returns to the first aeration tank by the first mud return line, simultaneously with after the first settling tank precipitate and separate upper strata liquid input the second aeration tank aeration; Then will be input to by the liquid of the second aeration tank aeration the second settling tank precipitation, the mud after precipitation returns to the second aeration tank by the second mud return line, simultaneously the water after the second settling tank precipitate and separate is discharged from water outlet.
Described sewage is 1-1.5 hours in the time that the first aeration tank aeration stops, and in the first aeration tank, MSLL is 3-6g/l, and in the first aeration tank, the input of sewage is 2:1-1:1 with the air feed ratio; Described sewage is 2.5 hours in the time of the first settling tank precipitation, and in the first settling tank, the return sludge ratio of precipitation is 80%-100%.
After described the first settling tank precipitate and separate upper strata liquid be 18-21 hours in the time that the second aeration tank aeration stops, in the second aeration tank, MSLL is 2-4g/l, in the second aeration tank, DO is 2-6mg/l; Described upper strata liquid is 4-6 hours in the time of the second settling tank precipitation, and in the second settling tank, the return sludge ratio of precipitation is 60%-100%.
Precipitating sludge in described the first mud return line and the second mud return line is discharged by the spoil disposal bucket.
Beneficial effect of the present invention is: the invention provides pre-treatment and the two sections aeration type combination techniques treatment process to sewage, the first aerating system reaction time of setting up is short, oxygen supply is in Lower state, generate different microorganism systems in corresponding domestication and operational process, it can reduce the organic effect of part in sewage; , by being used in conjunction with of the first aerating system and the second aerating system, alleviating pretreatment stage and the second aerating system processing pressure for sewage, more than making simultaneously the water outlet COD decline 20mg/l after processing.
Description of drawings
Fig. 1 is the structural representation of invention.
Embodiment
Embodiment 1
As shown in Figure 1, the present embodiment provides pre-treatment and the two sections aeration type combination techniques treatment process to sewage, comprise the steps: at first sewage to be precipitated pre-treatment by the dosing coagulative precipitation tank, then with the input of the sewage after the pre-treatment precipitate and separate the first aeration tank 1 aeration.
Then with the input of the sewage by the first aeration tank 1 aeration the first settling tank 2 precipitations, the mud after precipitation returns to the first aeration tank 1 by the first mud return line 5, simultaneously with after the first settling tank 2 precipitate and separate upper strata liquid input the second aeration tank 3 aerations.Precipitating sludge in described the first mud return line 5 is discharged by spoil disposal bucket 7.
Described sewage is 1 hour in the time that the first aeration tank 1 aeration stops, and the first interior MSLL in aeration tank 1 is 3g/l, and the input of the first aeration tank 1 interior sewage and supplier's wind are 2:1; Described sewage is 2.5 hours in the time of the first settling tank 2 precipitations, and the return sludge ratio of the first settling tank 2 interior precipitations is 80%-100%.
Then will be input to by the liquid of the second aeration tank 3 aerations the second settling tank 4 precipitations, the mud after precipitation returns to the second aeration tank 3 by the second mud return line 6, simultaneously the water after the second settling tank 2 precipitate and separate is discharged from water outlet 8.Precipitating sludge in described the second mud return line 6 is discharged by spoil disposal bucket 7.
After described the first settling tank 2 precipitate and separate upper strata liquid be 18 hours in the time that the second aeration tank 3 aerations stop, the second interior MSLL in aeration tank 3 is 2g/l, in the second aeration tank 3, DO is 2mg/l; Described upper strata liquid is 4 hours in the time of the second settling tank 4 precipitations, and the return sludge ratio of the second settling tank 4 interior precipitations is 60%-100%.
The described pre-treatment of the present embodiment and the two sections aeration type combination techniques treatment process to sewage, the first aerating system reaction time of setting up is short, oxygen supply is in Lower state, generate different microorganism systems in corresponding domestication and operational process, it can reduce the organic effect of part in sewage; , by being used in conjunction with of the first aerating system and the second aerating system, alleviating pretreatment stage and the second aerating system processing pressure for sewage, more than making simultaneously the water outlet COD decline 20mg/l after processing.
As shown in Figure 1, the present embodiment provides pre-treatment and the two sections aeration type combination techniques treatment process to sewage, comprise the steps: at first sewage to be precipitated pre-treatment by the dosing coagulative precipitation tank, then with the input of the sewage after the pre-treatment precipitate and separate the first aeration tank 1 aeration.
Then with the input of the sewage by the first aeration tank 1 aeration the first settling tank 2 precipitations, the mud after precipitation returns to the first aeration tank 1 by the first mud return line 5, simultaneously with after the first settling tank 2 precipitate and separate upper strata liquid input the second aeration tank 3 aerations.Precipitating sludge in described the first mud return line 5 is discharged by spoil disposal bucket 7.
Described sewage is 1.5 hours in the time that the first aeration tank 1 aeration stops, and the first interior MSLL in aeration tank 1 is 6g/l, and the input of the first aeration tank 1 interior sewage and supplier's wind are 1:1; Described sewage is 2.5 hours in the time of the first settling tank 2 precipitations, and the return sludge ratio of the first settling tank 2 interior precipitations is 80%-100%.
Then will be input to by the liquid of the second aeration tank 3 aerations the second settling tank 4 precipitations, the mud after precipitation returns to the second aeration tank 3 by the second mud return line 6, simultaneously the water after the second settling tank 2 precipitate and separate is discharged from water outlet 8.Precipitating sludge in described the second mud return line 6 is discharged by spoil disposal bucket 7.
After described the first settling tank 2 precipitate and separate upper strata liquid be 21 hours in the time that the second aeration tank 3 aerations stop, the second interior MSLL in aeration tank 3 is 4g/l, in the second aeration tank 3, DO is 6mg/l; Described upper strata liquid is 6 hours in the time of the second settling tank 4 precipitations, and the return sludge ratio of the second settling tank 4 interior precipitations is 60%-100%.
The described pre-treatment of the present embodiment and the two sections aeration type combination techniques treatment process to sewage, the first aerating system reaction time of setting up is short, oxygen supply is in Lower state, generate different microorganism systems in corresponding domestication and operational process, it can reduce the organic effect of part in sewage; , by being used in conjunction with of the first aerating system and the second aerating system, alleviating pretreatment stage and the second aerating system processing pressure for sewage, more than making simultaneously the water outlet COD decline 20mg/l after processing.
As shown in Figure 1, the present embodiment provides pre-treatment and the two sections aeration type combination techniques treatment process to sewage, comprise the steps: at first sewage to be precipitated pre-treatment by the dosing coagulative precipitation tank, then with the input of the sewage after the pre-treatment precipitate and separate the first aeration tank 1 aeration.
Then with the input of the sewage by the first aeration tank 1 aeration the first settling tank 2 precipitations, the mud after precipitation returns to the first aeration tank 1 by the first mud return line 5, simultaneously with after the first settling tank 2 precipitate and separate upper strata liquid input the second aeration tank 3 aerations.Precipitating sludge in described the first mud return line 5 is discharged by spoil disposal bucket 7.
Described sewage is 1.2 hours in the time that the first aeration tank 1 aeration stops, and the first interior MSLL in aeration tank 1 is 4g/l, and the input of the first aeration tank 1 interior sewage and supplier's wind are 2:1; Described sewage is 2.5 hours in the time of the first settling tank 2 precipitations, and the return sludge ratio of the first settling tank 2 interior precipitations is 80%-100%.
Then will be input to by the liquid of the second aeration tank 3 aerations the second settling tank 4 precipitations, the mud after precipitation returns to the second aeration tank 3 by the second mud return line 6, simultaneously the water after the second settling tank 2 precipitate and separate is discharged from water outlet 8.Precipitating sludge in described the second mud return line 6 is discharged by spoil disposal bucket 7.
After described the first settling tank 2 precipitate and separate upper strata liquid be 19 hours in the time that the second aeration tank 3 aerations stop, the second interior MSLL in aeration tank 3 is 3g/l, in the second aeration tank 3, DO is 4mg/l; Described upper strata liquid is 5 hours in the time of the second settling tank 4 precipitations, and the return sludge ratio of the second settling tank 4 interior precipitations is 60%-100%.
The described pre-treatment of the present embodiment and the two sections aeration type combination techniques treatment process to sewage, the first aerating system reaction time of setting up is short, oxygen supply is in Lower state, generate different microorganism systems in corresponding domestication and operational process, it can reduce the organic effect of part in sewage; , by being used in conjunction with of the first aerating system and the second aerating system, alleviating pretreatment stage and the second aerating system processing pressure for sewage, more than making simultaneously the water outlet COD decline 20mg/l after processing.
Claims (4)
1. pre-treatment and the two sections aeration type combination techniques treatment process to sewage, it is characterized in that comprising the steps: at first sewage being precipitated pre-treatment by the dosing coagulative precipitation tank, then with the input of the sewage after the pre-treatment precipitate and separate the first aeration tank (1) aeration; Then will be by sewage input the first settling tank (2) precipitation of the first aeration tank (1) aeration, mud after precipitation returns to the first aeration tank (1) by the first mud return line (5), simultaneously with liquid input the second aeration tank (3), the upper strata aeration after the first settling tank (2) precipitate and separate; Then will be input to by the liquid of the second aeration tank (3) aeration the second settling tank (4) precipitation, mud after precipitation returns to the second aeration tank (3) by the second mud return line (6), simultaneously the water after the second settling tank (2) precipitate and separate is discharged from the water outlet (8) of the second aeration tank (3).
2. pre-treatment according to claim 1 and the two sections aeration type combination techniques treatment process to sewage, it is characterized in that: described sewage is 1-1.5 hours in the time that the first aeration tank (1) aeration stops, the interior MSLL in the first aeration tank (1) is 3-6g/l, and the input of the interior sewage in the first aeration tank (1) is 2:1-1:1 with the air feed ratio; Described sewage is 2.5 hours in the time of the first settling tank (2) precipitation, and in the first settling tank (2), the return sludge ratio of precipitation is 80%-100%.
3. pre-treatment according to claim 1 and the two sections aeration type combination techniques treatment process to sewage, it is characterized in that: the upper strata liquid after described the first settling tank (2) precipitate and separate is 18-21 hours in the time that the second aeration tank (3) aeration stops, the interior MSLL in the second aeration tank (3) is 2-4g/l, and in the second aeration tank (3), DO is 2-6mg/l; Described upper strata liquid is 4-6 hours in the time of the second settling tank (4) precipitation, and in the second settling tank (4), the return sludge ratio of precipitation is 60%-100%.
4. pre-treatment according to claim 1 and the two sections aeration type combination techniques treatment process to sewage, it is characterized in that: the precipitating sludge in described the first mud return line (5) and the second mud return line (6) is discharged by spoil disposal bucket (7).
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| CN2013103234270A CN103387315A (en) | 2013-07-29 | 2013-07-29 | Process for treating sewage by virtue of combined technology of pretreatment and two stages of aeration |
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| CN2013103234270A CN103387315A (en) | 2013-07-29 | 2013-07-29 | Process for treating sewage by virtue of combined technology of pretreatment and two stages of aeration |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787553A (en) * | 2014-02-12 | 2014-05-14 | 苏州龙杰特种纤维股份有限公司 | Chemical fiber wastewater treatment process |
| CN106045040A (en) * | 2016-07-18 | 2016-10-26 | 合肥益企学科技有限公司 | Two-stage sewage treatment system and using method thereof |
| CN113754117A (en) * | 2021-09-11 | 2021-12-07 | 黄永根 | Integrated dephenolization process and device thereof |
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| CN101205109A (en) * | 2007-12-18 | 2008-06-25 | 泉州市天龙环境工程有限公司 | Apparatus for treating chemical fiber waste water by anaerobic method |
| CN101693582A (en) * | 2009-10-22 | 2010-04-14 | 同济大学 | Simple sewage treatment device of alternate aeration basin and treatment technique thereof |
| CN101767916A (en) * | 2010-02-01 | 2010-07-07 | 中国市政工程华北设计研究总院 | Method for reasonably optimizing and distributing carbon source in treatment of refractory wastewater |
| CA2780716A1 (en) * | 2009-12-01 | 2011-06-09 | Jinmin Li | Method and apparatus for sludge treatment and use thereof in sewage biotreatment |
| CN102225825A (en) * | 2011-05-09 | 2011-10-26 | 余静 | Zero-energy-consumption enhanced AB (adsorption-biodegradation) treatment method for urban sewage |
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2013
- 2013-07-29 CN CN2013103234270A patent/CN103387315A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101205109A (en) * | 2007-12-18 | 2008-06-25 | 泉州市天龙环境工程有限公司 | Apparatus for treating chemical fiber waste water by anaerobic method |
| CN101693582A (en) * | 2009-10-22 | 2010-04-14 | 同济大学 | Simple sewage treatment device of alternate aeration basin and treatment technique thereof |
| CA2780716A1 (en) * | 2009-12-01 | 2011-06-09 | Jinmin Li | Method and apparatus for sludge treatment and use thereof in sewage biotreatment |
| CN101767916A (en) * | 2010-02-01 | 2010-07-07 | 中国市政工程华北设计研究总院 | Method for reasonably optimizing and distributing carbon source in treatment of refractory wastewater |
| CN102225825A (en) * | 2011-05-09 | 2011-10-26 | 余静 | Zero-energy-consumption enhanced AB (adsorption-biodegradation) treatment method for urban sewage |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787553A (en) * | 2014-02-12 | 2014-05-14 | 苏州龙杰特种纤维股份有限公司 | Chemical fiber wastewater treatment process |
| CN106045040A (en) * | 2016-07-18 | 2016-10-26 | 合肥益企学科技有限公司 | Two-stage sewage treatment system and using method thereof |
| CN113754117A (en) * | 2021-09-11 | 2021-12-07 | 黄永根 | Integrated dephenolization process and device thereof |
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Application publication date: 20131113 |