CN102092895A - Method for treating industrial waste water based on combination of secondary biochemistry process and primary physico-chemical process - Google Patents
Method for treating industrial waste water based on combination of secondary biochemistry process and primary physico-chemical process Download PDFInfo
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- CN102092895A CN102092895A CN 201010591362 CN201010591362A CN102092895A CN 102092895 A CN102092895 A CN 102092895A CN 201010591362 CN201010591362 CN 201010591362 CN 201010591362 A CN201010591362 A CN 201010591362A CN 102092895 A CN102092895 A CN 102092895A
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Abstract
The invention relates to a method for treating industrial waste water based on combination of a secondary biochemistry process and a primary physico-chemical process, belonging to the technical field of sewage treatment. The method comprises the following steps: 1) causing the industrial waste water to pass through a pre-positioned biochemical system, namely causing the industrial waste water to successively pass through an anaerobic tank, an aerobic tank A and a sedimentation tank so as to achieve the function of reducing the biochemical oxygen demand/chemical oxygen demand (B/C) ratio in the industrial waste water to the minimum; 2) causing the industrial waste water treated in the step 1) to pass through an ozone oxidation tank so as to achieve the function of improving the B/C ratio in the industrial waste water by virtue of advanced oxidization to create biochemical conditions for the inflow of an aerobic tank B; 3) degrading the chemical oxygen demand (COD) of the industrial waste water treated in the step 2) through oxygenolysis of microorganism in the aerobic tank B; and 4) precipitating the industrial waste water treated in the step 3) and then discharging. By utilizing the method in the invention, the industrial waste water which has less possibility of being subjected to biochemistry can be treated, the operation cost is low, the occupied area is small, the treatment effect is good, and the treated industrial waste water can reach the emission standard.
Description
Technical field
The present invention relates to utilize the method for Two-Stage Biochemical and one-level materialization junction science and engineering industry waste water, belong to technical field of sewage.
Background technology
Biochemical processing process is one of most widely used method in the existing sewage treatment project, key is that this technical operation cost is low, in the very suitable municipal wastewater treatment system that the water yield is big, biodegradability is strong, this technology is widely used in the municipal wastewater factory in the whole world at present.But along with the fast development of industry, the discharging of trade effluent has become influences the arch-criminal that the water globe resource worsens.Its reason is that the biodegradable material of trade effluent complicated component is few, adopt simple biochemical processing process with Industrial Wastewater Treatment below emission standard, to have only and to adopt the physicochemical techniques of strengthening to handle the pollution substance in the trade effluent below the mark.Though but the physicochemical techniques floor space is little, the processing efficiency height, its high working cost (100～20 yuan of/ton water) allows many enterprises hang back, and many enterprises of having gone up physicochemical techniques also give it up owing to not bearing so working cost gradually.In recent years, the utilization of uniting of many physicochemical techniques and biochemical process has appearred again, be intended to waste water be carried out after the pre-treatment to reach the requirement of biochemical system water inlet condition through physicochemical techniques, or earlier after handling, biochemical process carrying out technology check on (as active carbon absorption technology Fenton method etc.) with physicochemical techniques, its aim is exactly to reduce working cost as far as possible, reduces enterprise cost.But owing to there is not rational technical matters to control, two cover treatment systems well can't be combined all the time, cause processing cost still higher.
Along with the develop rapidly of China's industry, the continuous invention of various high-tech products, the waste water composition that produces in its production process also becomes increasingly complex, and the pollutent in some trade effluent even through the natural degradations of decades is appointed and can't thoroughly be purified.Especially some wastewater from chemical industry, contain nitro compound waste water (nitro-compound content reaches 150-600mg/L), purified cotton black liquor waste (COD is 10000-30000mg/L) etc. as what some chemical plant under my group produced, this type of waste water is Pollutant levels height, colourity height not only, and be difficult to biochemistry, if directly enter in the water body, will bring expendable disaster to ecotope.
Prior art generally adopts physico-chemical process to this type of waste water.(working cost is about 150 yuan/m as burning method
3), (29～30 yuan/m of active carbon adsorptions
3), (10～20 yuan/m of interior electrolysis solutions
3), (5～10 yuan/m of neutralisations
3) etc., in these methods, but as burning method exhaustive oxidation pollutants in waste water matter, but working cost is high, and general enterprise is difficult to accept.Active carbon adsorption is the purifying method that present most of enterprise all generally adopts, but this method gac consumption height, on average adsorbing every cubic metre of waste water needs gac 50～100Kg approximately, and the gac consumption is big.If adopt active carbon regenerating technology, then can produce new secondary pollution again, for the saturated gac of absorption, most of enterprises adopt the method for directly burning to dispose, and this has increased running cost virtually again.Though internal electrolysis and neutralisation have a low removal effect to pollutent, removal efficient is not high and this class methods floor space is big, labour intensity is high.
Along with improving constantly of wastewater processing technology, existing at present minority enterprise takes the combination process of " materialization+biochemistry " to handle this type of waste water.Difficult biochemical trade effluent is at first handled (pretreatment section) through materialization, the material of most of difficult for biological degradation in the water can be oxidized to easier biochemical goods and materials, and then discharge after biochemical treatment.This kind method can be controlled the degree of treatment of physicochemical techniques to a certain extent, being intended to that the difficult biochemical substances in the waste water is degraded to small-molecule substance gets final product, but in actually operating, this trim point is difficult to control, because the composition more complicated of pretreatment stage waste water, various difficult biochemical substances and Ke Yi biochemical substances are mixed in together, and the pre-treatment physicochemical techniques does not almost have selectivity to the oxidation of these materials and absorption, cause more easily by the material of biochemistry by a large amount of oxidations, most of difficult biochemical substances is by partial oxidation.From The apparent phenomenon, after the processing in materialization stage, the COD of waste water has obvious decline, but the BOD value is not on the contrary for rising counter falling.Waste water after this art breading does not possess the water inlet condition of biochemical system fully, causes biochemical system still not become effective through the cultivation of some months, causes water outlet not up to standard.Just as mentioned before, if then there are shortcomings such as energy consumption height, working cost height, operating procedure complexity in the simple physicochemical techniques that adopts, general enterprise is difficult to bear for the trade effluent of difficult for biological degradation.
If adopt " materialization+biochemistry " combined treatment process, then exist energy dissipation, can not fine control physical reaction degree, and causes biochemical system can not farthest bring into play processing power, thereby can not effectively reduce working cost, and water outlet can not stably reaching standard.
If adopt " biochemistry+materialization " combined treatment process, then have shortcomings such as energy consumption height, working cost height.Simultaneously, owing to adopt materialization postpone, can cause the waste of the energy by the material of biochemistry also in the lump by exhaustive oxidation after the former herbal classic incomplete oxidation.
Summary of the invention
The objective of the invention is to handle trade effluent and can't satisfy the problem of emission standard, use physical chemistry method to handle the problem of trade effluent expense costliness and the biochemical method problem that trim point is difficult to control that combines with physical chemistry method separately, propose to utilize Two-Stage Biochemical and the one-level materialization junction science and engineering method of waste water already in order to solve independent use biochemical method.
The objective of the invention is to be achieved through the following technical solutions.
The method of utilizing Two-Stage Biochemical and one-level materialization junction science and engineering industry waste water of the present invention, the concrete steps of this method are:
1) trade effluent is passed through preposition biochemical system, promptly successively by behind anaerobic pond, Aerobic Pond A and the settling tank, its effect is to reduce to the B/C ratio in the trade effluent minimum;
2) trade effluent after will handling through step 1) is by the ozone oxidation pond, its effect be by advanced oxidation improving the B/C ratio in the trade effluent, but be that biochemical condition is created in Aerobic Pond B water inlet;
3) will be through step 2) trade effluent after handling in Aerobic Pond B by the oxygenolysis of microorganism the COD that degrades;
4) emit through post precipitation through the trade effluent after the step 3) processing.
Above-mentioned steps 2) by the power of adjustment, controls the ozone amount that enters the ozone oxidation pond in the matching used ozonizer in ozone oxidation pond;
Above-mentioned steps 3) the Aerobic Pond B in comprises a matching used online dissolved oxygen instrument;
By the dissolved oxygen amount in the online dissolved oxygen instrument monitoring Aerobic Pond B trade effluent, control the generating capacity of ozonizer according to the size of dissolved oxygen amount, if, then adjusting the service rating of ozonizer greater than 3.0mg/L, dissolved oxygen amount is 60%～100% of its rated output; If dissolved oxygen amount is smaller or equal to 2.0mg/L, the service rating of then adjusting ozonizer is 30%～40% of its rated output, if smaller or equal to 3.0mg/L, the service rating of then adjusting ozonizer is 40%～60% of its rated output to dissolved oxygen amount greater than 2.0mg/L.
Beneficial effect
Method of the present invention can be handled and be difficult for biochemical trade effluent, and working cost is low, floor space is little, and treatment effect is good, and the trade effluent after the processing reaches emission standard.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Embodiment
Utilize Two-Stage Biochemical and one-level materialization junction science and engineering the industry waste water method, the technical process of this method as shown in Figure 1, concrete steps are:
1) trade effluent is passed through preposition biochemical system, promptly successively by anaerobic pond, Aerobic Pond A and settling tank;
2) will be through the trade effluent after the step 1) processing by the ozone oxidation pond;
3) will be through step 2) trade effluent after handling by the oxygenolysis of microorganism the COD that degrades, discharges through post precipitation in Aerobic Pond B then;
Above-mentioned steps 1) before for being difficult for biochemical waste water, its leading indicator is: COD is 3200mg/L to trade effluent by preposition biochemical system in, and BOD is 520mg/L, and B/C is 0.16; After preposition biochemical system, its its leading indicator is: COD is 325mg/L, and BOD is 42mg/L, and B/C is 0.13;
Process step 2) leading indicator of the trade effluent after the processing is: COD is 361mg/L, and BOD is 189mg/L, and B/C is 0.52;
Leading indicator through the trade effluent after the step 3) processing is: COD is 68mg/L, and BOD is 8mg/L, and B/C is 0.12;
Above-mentioned steps 2) by the power of adjustment, controls the ozone amount that enters the ozone oxidation pond in the matching used ozonizer in ozone oxidation pond;
Above-mentioned steps 3) the Aerobic Pond B in comprises a matching used online dissolved oxygen instrument;
By the dissolved oxygen amount in the trade effluent among the online dissolved oxygen instrument monitoring Aerobic Pond B is 2.5mg/L, and the service rating of then setting ozonizer is 50% of its rated output.
Claims (6)
1. utilize the method for Two-Stage Biochemical and one-level materialization junction science and engineering industry waste water, it is characterized in that the concrete steps of this method are:
1) trade effluent is passed through preposition biochemical system, promptly successively by anaerobic pond, Aerobic Pond A and settling tank;
2) will be through the trade effluent after the step 1) processing by the ozone oxidation pond;
3) will be through step 2) trade effluent after handling in Aerobic Pond B by the oxygenolysis of microorganism the COD that degrades;
4) emit through post precipitation through the trade effluent after the step 3) processing.
2. the method for utilizing Two-Stage Biochemical and one-level materialization junction science and engineering industry waste water according to claim 1 is characterized in that: step 2) the ozone oxidation pond comprises a matching used ozonizer.
3. the method for utilizing Two-Stage Biochemical and one-level materialization junction science and engineering industry waste water according to claim 1, it is characterized in that: the Aerobic Pond B in the step 3) comprises a matching used online dissolved oxygen instrument.
4. according to claim 2 or the 3 described methods of utilizing Two-Stage Biochemical and one-level materialization junction science and engineering industry waste water, it is characterized in that: the dissolved oxygen amount of online dissolved oxygen instrument is greater than 3.0mg/L, and the service rating of ozonizer is 60%～100% of its rated output.
5. according to claim 2 or the 3 described methods of utilizing Two-Stage Biochemical and one-level materialization junction science and engineering industry waste water, it is characterized in that: the dissolved oxygen amount of online dissolved oxygen instrument is smaller or equal to 2.0mg/L, and the service rating of ozonizer is 30%～40% of its rated output.
6. according to claim 2 or the 3 described methods of utilizing Two-Stage Biochemical and one-level materialization junction science and engineering industry waste water, it is characterized in that: smaller or equal to 3.0mg/L, the service rating of ozonizer is 40%～60% of its rated output to the dissolved oxygen amount of online dissolved oxygen instrument greater than 2.0mg/L.
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| CN 201010591362 CN102092895A (en) | 2010-12-16 | 2010-12-16 | Method for treating industrial waste water based on combination of secondary biochemistry process and primary physico-chemical process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102936078A (en) * | 2011-08-16 | 2013-02-20 | 中国石油化工股份有限公司 | Method for treating wastewater of dry-spinning acrylic fibers |
| CN103771649A (en) * | 2012-10-23 | 2014-05-07 | 中国石油化工股份有限公司 | Treatment method of 1,3-propanediol production wastewater |
| CN105174640A (en) * | 2015-10-10 | 2015-12-23 | 浙江巨能环境工程设备有限公司 | Biochemical treatment process for paint-producing wastewater |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638286A (en) * | 2009-09-10 | 2010-02-03 | 浦华控股有限公司 | Treatment method of sewage containing dyeing wastewater |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638286A (en) * | 2009-09-10 | 2010-02-03 | 浦华控股有限公司 | Treatment method of sewage containing dyeing wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 《工业安全与环保》 20100110 张尊举 生化组合工艺对高浓度制浆造纸废水的深度处理 8-9 1-6 第36卷, 第1期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102936078A (en) * | 2011-08-16 | 2013-02-20 | 中国石油化工股份有限公司 | Method for treating wastewater of dry-spinning acrylic fibers |
| CN103771649A (en) * | 2012-10-23 | 2014-05-07 | 中国石油化工股份有限公司 | Treatment method of 1,3-propanediol production wastewater |
| CN105174640A (en) * | 2015-10-10 | 2015-12-23 | 浙江巨能环境工程设备有限公司 | Biochemical treatment process for paint-producing wastewater |
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Application publication date: 20110615 |