CN210711175U - Kitchen garbage anaerobic digestion waste water non-membrane method processing system - Google Patents
Kitchen garbage anaerobic digestion waste water non-membrane method processing system Download PDFInfo
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Abstract
The utility model discloses a kitchen waste anaerobic digestion waste water non-membrane treatment system, which comprises a grid, an oil separation sedimentation tank, an air flotation device and an adjusting tank which are connected in sequence, wherein the water outlet of the adjusting tank is connected with the water inlet of a SBR biochemical reaction tank, the water outlet of the SBR biochemical reaction tank sequentially enters a first-level A/O biochemical reaction tank and a second-level A/O biochemical reaction tank, the waste water from the second-level A/O biochemical reaction tank enters the first-level sedimentation tank and is precipitated by the first-level sedimentation tank, the water gets into the fenton reaction pond, and the water that comes out from the fenton reaction pond gets into second grade flocculation and precipitation pond, and the clear liquid that comes out from second grade flocculation and precipitation pond gets into tertiary AO biochemical reaction pond, and the water that comes out from tertiary AO biochemical reaction pond gets into the final sedimentation pond, and the final sedimentation pond effluent gets into sodium hypochlorite reaction pond, and water is up to standard after sodium hypochlorite oxidation disinfection discharges in sodium hypochlorite reaction pond. High treatment efficiency, low cost and simple operation management.
Description
Technical Field
The utility model relates to a kitchen garbage anaerobic digestion waste water non-membrane method processing system belongs to the water treatment field.
Background
With the increase of the output of kitchen waste, the amount of the generated kitchen waste water is larger and larger, and according to incomplete statistics, the untreated waste water discharged by catering industry in China every year reaches hundreds of millions of tons, and the trend is continuously increased. In addition, the data report that the discharge amount of the kitchen waste water is about 3 percent of the discharge amount of the urban domestic sewage, but the discharge amount of the kitchen waste water is BOD5And CODCrThe content of the organic nitrogen occupies 1/3 of the total load, and high-concentration organic matters and nitrogen in the kitchen waste water form serious threat to the surrounding urban water environment. The kitchen sewage has the characteristics of high impurity content, high oil content, high COD concentration, poor biochemical property, high ammonia nitrogen concentration and the like, and a plurality of technical difficulties exist in the treatment of the kitchen sewage by adopting the conventional sewage treatment technology. With the implementation of the examination regulations (trial) issued by the national action plan for water pollution prevention and control and the implementation of the action plan for water pollution prevention and control, the kitchen waste and wastewater treatment is an urgent problem to be solved in the harmless treatment and resource utilization processes of kitchen waste and kitchen waste.
The kitchen waste water discharge has no industrial discharge standard, most of the kitchen waste water is treated and discharged according to the following discharge standards according to the environmental requirements of different regions, the three-level standard in the integrated wastewater discharge standard (GB8978-1996) and the B-level standard in the wastewater discharge town sewer water quality standard (GB/T31962. sup. 2015) are mainly adopted, and part of regions need to reach the stricter standard of the pollution control standard of the domestic waste landfill (GB 16889. sup. 2008) in Table 2. At present, a combined process based on a membrane separation technology is mainly adopted for treating waste water after fermentation of kitchen waste, although the technology can efficiently separate and remove pollutants in water, the membrane component is easy to block due to high grease and salt in the waste water, the service life of the membrane is shortened, the operation difficulty is increased, the management is complex, and the treatment cost is high; in addition, a large amount of concentrate which is difficult to treat is generated in the membrane treatment process. Based on the above problems in the treatment engineering of kitchen waste fermentation wastewater (anaerobic digestion wastewater, namely wastewater generated by utilizing kitchen waste fermentation to produce biogas) by a membrane process, a kitchen waste fermentation wastewater treatment technology with high treatment efficiency, low cost and simple and convenient operation management is urgently needed.
CN 107352745A discloses a treatment method named as 'kitchen waste fermentation wastewater', which is mainly used for treating wastewater generated by kitchen waste slurry after anaerobic digestion and dehydration and wastewater generated by other working procedures of kitchen waste treatment. The wastewater is sequentially subjected to oil removal primary sedimentation, water quantity and water quality regulation, A/O biochemical treatment, sedimentation treatment, first coagulation sedimentation tank treatment, Fenton reactor treatment, second coagulation sedimentation treatment and aeration biochemical filter treatment. Can effectively remove COD and BOD in wastewater5And SS, TN, TP and the like, and the effluent can stably meet the requirements of ' primary standard ' of integrated wastewater discharge standard ' (GB 8978-1996).
CN 106430845A discloses a technology of a kitchen waste wastewater treatment device, waste water is sequentially treated by an oil separation primary sedimentation tank, an adjusting tank, a first pH adjusting tank, an ammonia stripping tower, a second pH adjusting tank, an A/O biochemical treatment device, a sedimentation tank, an ozone reactor, an aeration biological filter and a disinfection tank, and COD and BOD in the treated waste water5And pollutants such as NH3-N, TN, TP, SS, chromaticity and the like can stably meet the requirements of 'first-class standard' of integrated wastewater discharge standard (GB 3-1996) and 'B-class' of standard of wastewater discharge to urban sewer water quality standard (GB/T31962-2015).
CN 107352746A discloses a kitchen waste anaerobic digestion wastewater treatment method, which is used for treating wastewater generated by kitchen waste slurry anaerobic digestion dehydration and wastewater generated by other working procedures of kitchen waste treatment. The wastewater is sequentially subjected to oil removal primary sedimentation, water quantity and water quality regulation, pH value first regulation, free ammonia stripping in an ammonia stripping tower, pH value second regulation, A/O biochemical treatment, sedimentation treatment, air flotation treatment, Fenton reactor treatment, coagulation sedimentation tank treatment and aeration biological filter treatment. The anaerobic digestion wastewater of the kitchen waste is treated by the process, and COD and BOD in the wastewater5、NH3Pollutants such as-N, TP and chromaticity can stably meet the requirements of 'first-class standard' of Integrated wastewater discharge Standard (GB N, TP-1996), but TN can only reach less than 70 mg/L.
The quality of effluent water of the anaerobic digestion wastewater of the kitchen waste treated by the technology is improved, but part of indexes such as TN (less than 40mg/L) and other pollutants still do not meet the regulation in the pollution control standard of domestic waste landfill (GB 16889-2008).
SUMMERY OF THE UTILITY MODEL
To the technical problem, an object of the utility model is to provide a kitchen garbage anaerobic digestion waste water non-membrane method processing system, it is high to handle efficiency, and is with low costs, and operation management is simple, and it can reach "domestic waste landfill pollution control standard" (GB 16889) standard to go out the water.
In order to realize the purpose, the technical scheme of the utility model is that: the non-membrane treatment system for anaerobic digestion wastewater of kitchen waste is characterized in that: kitchen waste anaerobic digestion waste water enters an oil separation sedimentation tank to remove most of transfer vegetable oil and sediments after being intercepted by a grating tank, the waste water from the oil separation sedimentation tank enters an air floatation device to further remove floating oil and suspended matters and then enters an adjusting tank, the water outlet of the adjusting tank is connected with the water inlet of an SBR biochemical reaction tank, the outlet water of the SBR biochemical reaction tank sequentially enters a first-level A/O biochemical reaction tank and a second-level A/O biochemical reaction tank, the waste water from the second-level A/O biochemical reaction tank enters a first-level sedimentation tank, the water enters a Fenton reaction tank after being precipitated by the first-level sedimentation tank, the water from the Fenton reaction tank enters a second-level flocculation sedimentation tank, the clear liquid from the second-level flocculation sedimentation tank enters a third-level A/O biochemical reaction tank, and the water from the third-level A/O biochemical reaction tank enters a final sedimentation tank, and the effluent of the final sedimentation tank enters a sodium hypochlorite reaction tank, and the water is oxidized and disinfected by sodium hypochlorite in the sodium hypochlorite reaction tank and then is discharged after reaching the standard.
By adopting the scheme, the kitchen waste anaerobic digestion wastewater firstly enters a pretreatment system (a grating, an oil separation sedimentation tank, an air floatation device and a regulating tank), and most of vegetable oil, sediments and suspended substances contained in the wastewater are removed under the action of the pretreatment system.
The pretreated wastewater enters an SBR biochemical reaction tank for treatment, and most of COD in the wastewater is effectively removedCr、BOD5TN, TP and the like.
The effluent after SBR treatment enters a first-level A/O biochemical reaction tank for biochemical treatment, and COD in the wastewater can be further removedCr、BOD5、NH3-N, TN, TP and the like.
The effluent after the first-stage A/O biochemical treatment enters a second-stage A/O biochemical reaction tank for biochemical treatment, and COD in the wastewater can be further removedCr、BOD5、NH3-N, TN, TP and the like.
And (4) the effluent after the second-stage A/O biochemical treatment enters a first-stage sedimentation tank for sedimentation treatment, so that sludge-water separation is realized, and pollutants such as SS (suspended substances) and the like are further removed.
And (3) the effluent after the primary precipitation treatment enters a Fenton reaction tank, firstly, acid is added into the Fenton reaction tank to adjust the pH value of the wastewater to 3-4, then, a Fenton reagent is added into the Fenton reaction tank and stirred, organic pollutants which are difficult to degrade in the wastewater are oxidized and decomposed under the strong oxidizing effect of the Fenton reagent, and the CODCr, the chromaticity and the like in the wastewater are further reduced. The wastewater from the Fenton reaction tank enters a secondary flocculation sedimentation tank, alkali is added into a flocculation zone of the secondary flocculation sedimentation tank to adjust the pH value to 6-9, then a coagulant and a flocculant are added, iron ions in the wastewater undergo coagulation reaction under the condition, and COD (chemical oxygen demand) is further removedCrSS, chroma, etc.; then the water enters a settling zone of a secondary flocculation sedimentation tank to realize solid-liquid separation of the wastewater and further remove SS in the wastewater;
the effluent after the second-stage precipitation treatment enters a three-stage A/O biochemical reaction tank for biochemical treatment to further degrade COD in the wastewaterCr、NH3-N, TN, TP and the like.
And (4) allowing effluent subjected to three-stage A/O biochemical treatment to enter a final sedimentation tank for sedimentation treatment, and further removing pollutants such as SS (suspended substances) contained in the wastewater.
And (4) after the effluent subjected to the precipitation treatment in the final sedimentation tank enters a sodium hypochlorite disinfection tank for disinfection treatment, the effluent is discharged after reaching the standard.
COD in the treated wastewaterCr、BOD5And pollutants such as TN, TP, chromaticity and the like can stably reach the pollution control standard of the domestic garbage landfill (GB 16889-2008).
In the scheme, the method comprises the following steps: and part of sludge in the primary sedimentation tank flows back to the primary A/O biochemical reaction tank and the secondary A/O biochemical reaction tank, the residual sludge enters the sludge tank, and the sludge in the sludge tank is dewatered by the centrifugal dewatering machine and then transported outwards.
In the scheme, the method comprises the following steps: and part of sludge in the final sedimentation tank flows back to the three-stage A/O biochemical reaction tank, and the rest part of sludge flows to the sludge tank.
In the scheme, the method comprises the following steps: and the sludge of the oil separation sedimentation tank, the scum of the air floatation device, the residual sludge of the SBR biochemical reaction tank and the Fenton sludge of the secondary flocculation sedimentation tank are all removed from the sludge tank.
In the scheme, the method comprises the following steps: and aeration devices are arranged in the SBR biochemical reaction tank and the sodium hypochlorite reaction tank. Has the advantages that: the utility model discloses a processing system of waste water non-embrane method that produces behind kitchen garbage anaerobic digestion. The wastewater is sequentially subjected to pretreatment system, SBR biochemical treatment, primary A/O biochemical treatment, secondary A/O biochemical treatment, primary sedimentation tank, Fenton treatment, secondary flocculation sedimentation tank, tertiary A/O biochemical treatment, final sedimentation tank and sodium hypochlorite disinfection treatment. After the treatment of the system, COD in the wastewater generated after anaerobic digestion of the kitchen wasteCr、BOD5、NH3Pollutants such as-N and the like can be effectively degraded, and COD in the treated wastewaterCr、BOD5、TN、TP、NH3The pollutants such as-N, chromaticity and the like can stably reach the regulations of the pollution control standard of the domestic garbage landfill (GB 16889-2008). High treatment efficiency, low cost and simple operation management.
Drawings
Fig. 1 is a process flow diagram of the present invention.
Detailed Description
The invention will be further described by way of examples with reference to the accompanying drawings:
example 1, as shown in fig. 1, the kitchen waste anaerobic digestion wastewater non-membrane treatment system comprises a grid 1, an oil separation sedimentation tank 2, an air flotation device 3, a regulating tank 4, an SBR biochemical reaction tank 5, a primary a/O biochemical reaction tank 6, a secondary a/O biochemical reaction tank 7, a primary sedimentation tank 8, a fenton reaction tank 9, a secondary flocculation sedimentation tank 10, a tertiary a/O biochemical reaction tank 11, a final sedimentation tank 12, a sodium hypochlorite reaction tank 13, a sludge tank 14, a centrifugal dehydrator 15, a corresponding aeration device, a pipeline and the like.
The water quality conditions of anaerobic digestion wastewater of kitchen waste are as follows:
the kitchen waste anaerobic digestion wastewater enters an oil separation sedimentation tank 2 to remove most of vegetable oil and sediments after being intercepted by a grating 1, the floating oil in the oil separation sedimentation tank 2 is treated by qualified units, and the sediments enter a sludge tank 14. The wastewater from the oil separation sedimentation tank 2 enters an air floatation device 3 to further remove impurities such as floating oil and suspended matters and then enters a regulating tank 4, the water outlet of the regulating tank 4 is connected with the water inlet of an SBR biochemical reaction tank 5, and the wastewater is treated in the SBR biochemical reaction tank 5 to effectively remove most of COD (chemical oxygen demand) in the wastewaterCr、BOD5TN, TP and the like. The effluent of the SBR biochemical reaction tank 5 enters a first-level A/O biochemical reaction tank 6 and a second-level A/O biochemical reaction tank 7 in sequence to remove COD in the wastewaterCr、BOD5、NH3-N, TN, TP and the like. The wastewater from the second-level A/O biochemical reaction tank 7 enters a first-level sedimentation tank 8, the sludge part of the first-level sedimentation tank 8 returns to the aerobic tank of the first-level A/O biochemical reaction tank 6 and the aerobic tank of the second-level A/O biochemical reaction tank 7, the residual sludge enters a sludge tank 14, and the sludge in the sludge tank 14 is transported outside after being dehydrated by a centrifugal dehydrator 15.
After the wastewater is precipitated by the primary sedimentation tank 8, water enters the Fenton reaction tank 9, acid is firstly added into the Fenton reaction tank 9 to adjust the pH value of the wastewater to 3-4, then a Fenton reagent is added into the Fenton reaction tank 9 and stirred, organic pollutants which are difficult to degrade in the wastewater are oxidized and decomposed under the strong oxidizing effect of the Fenton reagent, and the COD (chemical oxygen demand) in the wastewater is further reducedCrColor, etc. Waste from the Fenton reaction tank 9The water enters a secondary flocculation sedimentation tank 10, the secondary flocculation sedimentation tank 10 is divided into a flocculation area and a sedimentation area, alkali is added into the flocculation area of the secondary flocculation sedimentation tank 10 to adjust the pH value to 6-9, then a coagulant PAC and a flocculant PAM are added, iron ions in the wastewater are subjected to coagulation reaction under the condition, and the COD is further removedCrSS, chroma; then the water enters a settling zone of a secondary flocculation sedimentation tank 10 to realize solid-liquid separation of the wastewater and further remove SS in the wastewater.
Clear liquid from the second-stage flocculation sedimentation tank 10 enters a third-stage A/O biochemical reaction tank 11 to further degrade COD in the wastewaterCr、NH3-N, TN, TP and the like. The water from the third-level A/O biochemical reaction tank 11 enters a final sedimentation tank 12, the sludge part of the final sedimentation tank 12 returns to the third-level A/O biochemical reaction tank 11, and the rest part enters a sludge tank 14. The effluent of the final sedimentation tank 12 enters a sodium hypochlorite reaction tank 13, and the water is oxidized and disinfected by sodium hypochlorite in the sodium hypochlorite reaction tank 13 and then is discharged after reaching the standard. The sludge of the oil separation sedimentation tank 2, the scum of the air floatation device 3, the residual sludge of the SBR biochemical reaction tank 5 and the Fenton sludge of the secondary flocculation sedimentation tank 10 are all removed from a sludge tank 14.
Aeration devices are arranged in the SBR biochemical reaction tank 5, the sodium hypochlorite reaction tank 13 and the aerobic tanks of all levels of A/O biochemical reaction tanks.
The total nitrogen of the effluent treated by the system is less than 40mg/L, and can stably reach the regulation of the pollution control standard of a domestic garbage landfill (GB 16889-.
The present invention is not limited to the above embodiments, and those skilled in the art can understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. The non-membrane treatment system for anaerobic digestion wastewater of kitchen waste is characterized in that: kitchen waste anaerobic digestion waste water enters an oil separation sedimentation tank to remove most of transfer vegetable oil and sediments after being intercepted by a grating, the waste water from the oil separation sedimentation tank enters an air floatation device to further remove floating oil and suspended matters and then enters an adjusting tank, the water outlet of the adjusting tank is connected with the water inlet of an SBR biochemical reaction tank, the outlet water of the SBR biochemical reaction tank sequentially enters a first-level A/O biochemical reaction tank and a second-level A/O biochemical reaction tank, the waste water from the second-level A/O biochemical reaction tank enters a first-level sedimentation tank, the water enters a Fenton reaction tank after being precipitated by the first-level sedimentation tank, the water from the Fenton reaction tank enters a second-level flocculation sedimentation tank, the clear liquid from the second-level flocculation sedimentation tank enters a third-level A/O biochemical reaction tank, and the water from the third-level A/O biochemical reaction tank enters a final sedimentation tank, and the effluent of the final sedimentation tank enters a sodium hypochlorite reaction tank, and the water is oxidized and disinfected by sodium hypochlorite in the sodium hypochlorite reaction tank and then is discharged after reaching the standard.
2. The non-membrane treatment system for anaerobic digestion wastewater of kitchen waste, according to claim 1, is characterized in that: and part of sludge in the primary sedimentation tank flows back to the primary A/O biochemical reaction tank and the secondary A/O biochemical reaction tank, the residual sludge enters the sludge tank, and the sludge in the sludge tank is dewatered by the centrifugal dewatering machine and then transported outwards.
3. The non-membrane treatment system for anaerobic digestion wastewater of kitchen waste, according to claim 2, is characterized in that: and part of sludge in the final sedimentation tank flows back to the three-stage A/O biochemical reaction tank, and the rest part of sludge flows to the sludge tank.
4. The non-membrane treatment system for anaerobic digestion wastewater of kitchen waste according to any one of claims 2 to 3, characterized in that: and the sludge of the oil separation sedimentation tank, the scum of the air floatation device, the residual sludge of the SBR biochemical reaction tank and the Fenton sludge of the secondary flocculation sedimentation tank are all removed from the sludge tank.
5. The non-membrane treatment system for anaerobic digestion wastewater of kitchen waste, according to claim 4, is characterized in that: and aeration devices are arranged in the SBR biochemical reaction tank and the sodium hypochlorite reaction tank.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112551800A (en) * | 2020-10-14 | 2021-03-26 | 南京万德斯环保科技股份有限公司 | Full-quantitative treatment method of kitchen biogas slurry |
| CN112759182A (en) * | 2020-12-17 | 2021-05-07 | 嘉兴天渊环保技术服务有限公司 | Biochemical combined treatment device and treatment process for kitchen waste |
| CN114890616A (en) * | 2022-04-25 | 2022-08-12 | 鄂尔多斯职业学院 | Coal chemical industry sewage biochemical treatment standard-reaching management system and source tracing method thereof |
| CN114956490A (en) * | 2022-07-13 | 2022-08-30 | 深圳市蓝清环境科技工程有限公司 | Advanced treatment process for landfill leachate |
-
2019
- 2019-09-20 CN CN201921576296.6U patent/CN210711175U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112551800A (en) * | 2020-10-14 | 2021-03-26 | 南京万德斯环保科技股份有限公司 | Full-quantitative treatment method of kitchen biogas slurry |
| CN112759182A (en) * | 2020-12-17 | 2021-05-07 | 嘉兴天渊环保技术服务有限公司 | Biochemical combined treatment device and treatment process for kitchen waste |
| CN114890616A (en) * | 2022-04-25 | 2022-08-12 | 鄂尔多斯职业学院 | Coal chemical industry sewage biochemical treatment standard-reaching management system and source tracing method thereof |
| CN114956490A (en) * | 2022-07-13 | 2022-08-30 | 深圳市蓝清环境科技工程有限公司 | Advanced treatment process for landfill leachate |
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