CN107043195B - Treatment method of areca nut wastewater - Google Patents
Treatment method of areca nut wastewater Download PDFInfo
- Publication number
- CN107043195B CN107043195B CN201710097373.9A CN201710097373A CN107043195B CN 107043195 B CN107043195 B CN 107043195B CN 201710097373 A CN201710097373 A CN 201710097373A CN 107043195 B CN107043195 B CN 107043195B
- Authority
- CN
- China
- Prior art keywords
- treatment
- biochemical
- tank
- wastewater
- sludge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention provides a treatment method of areca nut wastewater, which comprises the following steps: the first step is as follows: deslagging; the second step is that: performing biochemical treatment for the first time to obtain a first mixed solution; the third step: carrying out primary precipitation treatment on the first mixed solution to obtain first sludge and first precipitation liquid; the fourth step: carrying out secondary biochemical treatment on the first precipitation solution to obtain a second mixed solution; the fifth step: carrying out secondary sedimentation treatment on the second mixed solution to obtain second sludge and second sedimentation solution; and a sixth step: and carrying out subsequent treatment on the second precipitation solution. The method combines slag removal treatment and two-stage biochemical treatment to realize treatment of areca nut wastewater, changes the thought of the prior art, omits the pretreatment step, has a treatment effect not lower than that of the treatment mode of the prior art, greatly simplifies the process steps, avoids adding a large amount of treatment reagents, improves the stability of the system, reduces the sludge yield in the sewage treatment process, and saves the treatment cost.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a treatment method of areca nut wastewater.
Background
Betel nut is a chewing food in southern areas, nearly millions of tons of betel nuts are produced annually in Hainan, and during the processing of the betel nuts, about 5-15 tons of wastewater is produced in one ton of betel nuts. The betel nut wastewater has high organic matter concentration and contains toxic substances such as phenol and the like, and if the betel nut wastewater is directly discharged into an environmental water body, huge environmental damage is caused.
The betel nut wastewater has poor biodegradability and is wastewater with higher treatment difficulty. The prior art generally adopts a process route of pretreatment, biochemistry and advanced treatment, can basically realize standard discharge, but has the problems of high operation cost, large medicament dosage, high sludge yield, poor operation stability and the like, and the details are as follows:
the invention patent with application number 201110458167.9 discloses a treatment method of areca nut processing wastewater, which comprises the following steps: 1) filtering the betel nut processing wastewater by a manual screen and then discharging the betel nut processing wastewater to a regulating tank; 2) lifting the wastewater in the regulating tank to a UASB anaerobic reactor to remove most organic matters in the wastewater; 3) enabling supernatant of the UASB anaerobic reactor to flow into a primary biological contact oxidation tank, and removing partial organic matters in wastewater; 4) automatically flowing the wastewater treated in the step 3) into a first sedimentation tank for sedimentation; 5) the supernatant after precipitation automatically flows into an advanced oxidation reaction tank to pre-oxidize organic matters which are difficult to biodegrade; 6) automatically flowing the wastewater after advanced oxidation into a coagulating sedimentation tank for coagulation reaction and solid-liquid separation; 7) the supernatant after solid-liquid separation automatically flows into a secondary biological contact oxidation tank; 8) and 7) automatically flowing the wastewater treated in the step 7) into a second sedimentation tank for sedimentation, and discharging the supernatant after reaching the standard. This approach has several problems: (1) the residence time is too long, a large anaerobic tower is needed, the cost of the system heat-insulating structure is high, and the overall investment cost of the anaerobic tower is high; (2) the water inlet temperature of the betel nut wastewater in winter is not higher than 20 ℃, the UASB has the working temperature of 30-45 ℃, a large amount of energy consumption is consumed when the temperature is increased, but if the normal temperature is adopted, the anaerobic treatment system is easy to lose efficacy or collapse; (3) the growth period of anaerobic sludge is slow, the debugging time is more than three months, the operation and control are very complicated, and the normal operation cannot be realized after the construction of a plurality of areca nut factory anaerobic treatment towers is completed for several years at present; (4) at present, the anaerobic tower is heated by heat exchange in an indirect heat transfer mode, corrosive substances such as oil H2S and the like in the anaerobic tower have high corrosion speed of a heat exchanger, and because the temperature near the heat exchanger is high, a large amount of biological sludge is often gathered on the surface of the heat exchanger, the heat transfer resistance is high, and the heat transfer effect is difficult to guarantee. Therefore, in the areca-nut wastewater industry, USAB is rarely used and does not achieve ideal effects.
The invention patent with application number 201410141543.5 discloses a pretreatment method for improving biodegradability of areca nut seed boiling wastewater, which comprises the following steps: (1) firstly, filtering raw water of areca seed cooking wastewater to remove coarse substances in the wastewater; (2) the wastewater automatically flows into a regulating tank to regulate the quality and quantity of water; (3) the wastewater automatically flows into an aluminum-carbon micro-electrolysis reactor, and a blast aeration device is started to fully react; (4) automatically flowing the effluent after the reaction in the step (3) into a coagulation tank, and stirring; (5) enabling the mixed liquor reacted in the step (4) to automatically flow into a sedimentation tank for solid-liquid separation, and discharging supernatant into a subsequent biochemical treatment system; (6) and discharging sludge in the aluminum-carbon micro-electrolysis reactor and the sedimentation tank to a sludge concentration tank in a static pressure mode, carrying out outward treatment after sludge dehydration and concentration, and allowing filtrate obtained after sludge pressure filtration to flow into an adjusting tank. The method can effectively improve the biodegradability of the wastewater, but the concentration of organic matters in the areca nut wastewater is high, the micro-electrolysis of the aluminum powder has no selectivity, and the areca nut wastewater can react with the aluminum powder regardless of easily degradable organic matters or difficultly degradable organic matters, so that the waste of the aluminum powder is caused.
The invention application with the application number of 201610174817.X discloses a treatment method of wastewater from betel nut brewing and cooking production, which comprises the steps of firstly removing impurities from the wastewater, and then pretreating the wastewater by an FCM-III iron-carbon micro-electrolysis technology; carrying out slag-liquid separation by utilizing aeration oxidation, flocculation and air flotation technologies after micro-electrolysis; then, the subsequent treatment is carried out on the wastewater by adopting the process of UASB + MBBR + anoxic + aerobic. The process has the following problems: (1) the process carries out air floatation after the iron-carbon micro-electrolysis, the iron-carbon micro-electrolysis has almost no effect of removing suspended matters, the air floatation is responsible for removing main suspended organic matters, and because the concentration of the suspended matters in the areca-nut wastewater is very high, a large amount of medicament is required to be added in the air floatation; (2) a large amount of scum is generated, and the scum belongs to industrial waste, so that the method is not environment-friendly and economical; (3) the process has excessive treatment steps, too complex operation and low wastewater discharge amount in betel nut factories, so the process is not economical.
In view of the above, there is a need for a wastewater treatment method with simple process, easily controllable process parameters, low treatment cost and easy operation, so as to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a treatment method of areca nut wastewater, which has the advantages of simple process, easily controlled process parameters, low treatment cost and convenient operation, and the specific technical scheme is as follows:
a treatment method of areca nut wastewater comprises the following steps:
the first step is as follows: carrying out slag removal treatment on betel nut wastewater;
the second step is that: placing the areca nut wastewater after deslagging into a primary biochemical pool for carrying out first biochemical treatment to obtain a first mixed solution;
the third step: putting the first mixed solution into a primary sedimentation tank for primary sedimentation to obtain first sludge and first sedimentation liquid, wherein the first sludge is divided into two parts, the first part flows back to a primary biochemical tank, and the second part enters a sludge concentration tank for concentration treatment;
the fourth step: placing the first precipitation solution into a secondary biochemical pool for secondary biochemical treatment to obtain a second mixed solution;
the fifth step: putting the second mixed solution into a secondary sedimentation tank for secondary sedimentation to obtain second sludge and second sedimentation liquid, wherein the second sludge is divided into two parts, the first part flows back to the secondary biochemical tank, and the second part flows back to the primary biochemical tank;
and a sixth step: and carrying out subsequent treatment on the second precipitation solution to obtain the water meeting the discharge standard.
Preferably, in the technical scheme, the first biochemical treatment is carried out under the conditions of normal temperature and normal pressure, the biochemical time is 2-7 hours, and the amount of dissolved oxygen is 1-2 mg/L; the first precipitation is carried out under the conditions of normal temperature and normal pressure, and the retention time of a precipitation tank is 4-5 h; the first-stage sedimentation tank at least has a clear water layer with the height of 1 m.
Preferably, in the technical scheme, the second biochemical treatment is carried out under the conditions of normal temperature and normal pressure, the biochemical time is 5-12 hours, and the amount of dissolved oxygen is 2-4 mg/L; the first precipitation is carried out under the conditions of normal temperature and normal pressure, and the retention time of a precipitation tank is 4-5 h; the secondary sedimentation tank is at least provided with a clear water layer with the height of 1 m.
Preferably, the subsequent treatment comprises coagulation flocculation or a combination of iron-carbon micro-electrolysis and chemical oxidation.
Preferably, in the above technical scheme, the medicament in the coagulation and flocculation is formed by combining a coagulant and activated carbon, and the mass ratio of the coagulant to the activated carbon is 2: 1, wherein the addition amount of the coagulant is 100-500 mg/L;
or the medicament in the coagulation flocculation is formed by combining a coagulant, activated carbon and a flocculant, wherein the mass ratio of the coagulant to the activated carbon to the flocculant is 1: 1-5: 1; adding flocculant after adding coagulant, wherein the adding amount of the flocculant is 10-100 mg/L.
Preferably, in the above technical scheme, the coagulant is at least one of polymeric ferric chloride, polymeric aluminum chloride, polymeric ferric sulfate, ferric chloride, aluminum chloride and ferric sulfate; the active carbon is 200-1000 mesh powder active carbon; the flocculating agent is at least one of polyacrylamide, bone glue and chitosan.
In the above technical solution, preferably, the oxidizing substance used in the chemical oxidation is hydrogen peroxide or ozone.
Preferably, in the above technical solution, the amounts of dissolved oxygen in the first biochemistry and the second biochemistry are both measured by a dissolved oxygen meter; the primary biochemical tank and the secondary biochemical tank are both connected with a fan.
Preferably in the above technical solution, the deslagging in the first step specifically comprises: and a 100-mesh filter screen is adopted for deslagging.
The technical scheme of the invention has the following beneficial effects:
(1) in the prior art, the treatment of areca nut wastewater is performed through a process route of 'pretreatment + biochemistry + advanced treatment', a large amount of chemical reagents are added in the pretreatment step to perform pretreatment on the wastewater, and the following problems exist: firstly, the betel nut wastewater contains a large amount of organic matters and suspended matters, and a large amount of chemical reagents are required to be added by adopting pretreatment modes such as iron-carbon micro-electrolysis or coagulation; secondly, the added chemical agent necessarily generates a large amount of sludge; thirdly, the process route has many steps and is easy to generate faults. All three problems cause the sharp increase of the wastewater treatment cost and increase the burden of production enterprises. The method can complete the treatment of the areca nut wastewater by combining the slag removal treatment, the two-stage biochemical treatment and the subsequent treatment steps, changes the thought of the prior art, directly carries out the biochemical treatment twice after the simple slag removal, avoids the pretreatment step, has the treatment effect not lower than that of the treatment mode of the prior art, greatly simplifies the process steps, avoids the addition of a large amount of treatment reagents, improves the stability of the system, reduces the sludge yield in the sewage treatment process and saves the treatment cost.
(2) The equipment adopted in the method is simple and the manufacturing cost is low.
(3) The two-stage biochemical parameters of the invention are reasonably controlled, the degradation rate of COD after the first-stage biochemical treatment is ensured to be 80-90%, the degradation rate of COD after the second-stage biochemical treatment is more than 98%, the COD after the whole process treatment is stabilized at 100mg/L, the effluent chroma is lower than 20, and the two-stage biochemical treatment completely conforms to the discharge standard of industrial wastewater.
(4) The subsequent treatment steps adopt the mature coagulation flocculation or the combination of iron-carbon micro-electrolysis and chemical oxidation in the prior art, the process steps are simplified, the reagent is easy to obtain and has low cost, and the treatment cost is further reduced.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view showing the structure of treating wastewater from betel nut treatment according to preferred embodiment 1 of the present invention;
the device comprises a first-stage biochemical tank, a first-stage sedimentation tank, a second-stage biochemical tank, a second-stage sedimentation tank, a sludge concentration tank, a fan, a subsequent treatment device, a filtering device and a filtering device, wherein the first-stage biochemical tank is 1, the first-stage sedimentation tank is 2, the second-stage biochemical tank is 3, the second-stage sedimentation tank is 4, the sludge concentration tank is 5, the fan is.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1, a treatment method of areca nut wastewater specifically adopts a device comprising: the device comprises a primary biochemical tank 1, a primary sedimentation tank 2, a secondary biochemical tank 3, a secondary sedimentation tank 4, a sludge concentration tank 5, a fan 6, a subsequent treatment device 7 and a filtering device 8, wherein the fan 6 is communicated with the primary biochemical tank 1 and the secondary biochemical tank 3 to provide oxygen for the primary biochemical tank and the secondary sedimentation tank.
The treatment of the betel nut wastewater specifically comprises the following steps:
the first step is as follows: the areca nut wastewater is subjected to slag removal treatment, wherein the slag removal treatment specifically comprises the following steps: a deslagging device 8 (a 100-mesh filter screen is used for deslagging specifically) is adopted for deslagging;
the second step is that: placing the areca nut wastewater after deslagging into a first-stage biochemical pool for first biochemical treatment to obtain a first mixed solution, wherein the first biochemical treatment is carried out under the conditions of normal temperature and normal pressure, the biochemical treatment time is 5 hours, and the dissolved oxygen is controlled to be 1-2 mg/L;
the third step: putting the first mixed solution into a primary sedimentation tank for primary sedimentation to obtain first sludge and first sedimentation liquid, wherein the first sludge is divided into two parts, the first part flows back to a primary biochemical tank, the second part enters a sludge concentration tank for concentration treatment, the primary sedimentation is carried out under the conditions of normal temperature and normal pressure, and the hydraulic retention time of the sedimentation tank is 5 hours; in order to prevent the sludge in the first sedimentation tank from entering the second biochemical tank, when the sludge-water interface rises to a distance of 1m from the overflow weir crest, the control of the sludge-water interface is realized by the proportion of the first part and the second part in the first sludge;
the fourth step: placing the first precipitation solution into a secondary biochemical pool for secondary biochemical treatment to obtain a second mixed solution, wherein the secondary biochemical treatment is carried out under the conditions of normal temperature and normal pressure, the biochemical treatment time is 12 hours, and the amount of dissolved oxygen is 2-4 mg/L;
the fifth step: placing the second mixed solution into a secondary sedimentation tank for secondary sedimentation to obtain second sludge and second sedimentation liquid, wherein the second sludge is divided into two parts, the first part flows back to a secondary biochemical tank, the second part flows back to a primary sedimentation tank, the primary sedimentation is carried out under the conditions of normal temperature and normal pressure, and the hydraulic retention time of the sedimentation tank is 5 hours; in order to prevent the sludge in the first sedimentation tank from entering the second biochemical tank, when the sludge-water interface rises to a distance of 1m from the overflow weir crest, the control of the sludge-water interface is realized by the proportion of the first part and the second part in the second sludge;
and a sixth step: and (3) performing subsequent treatment on the second precipitation solution to obtain water meeting the discharge standard, wherein the subsequent treatment comprises coagulation and flocculation, and specifically comprises the following steps: the medicament adopted in the coagulation flocculation is formed by combining a coagulant, activated carbon and a flocculating agent, and the concrete process is as follows: adding a coagulant (polyaluminium chloride, PAC) and activated carbon into the wastewater, uniformly stirring, adding 10-50ppm of a flocculant (polyacrylamide, PAM) into the wastewater, wherein the mass ratio of the coagulant to the activated carbon to the flocculant is 1: 5: 1; then the wastewater enters an air floatation machine for air floatation, and the water quality of the air floatation effluent comprehensively reaches the first level of the comprehensive sewage discharge standard.
The coagulant can also adopt other types of polymeric ferric chloride, polymeric ferric sulfate, ferric chloride, aluminum chloride and ferric sulfate; the active carbon is 800-mesh powdered active carbon; the flocculant can also adopt bone glue and other types of chitosan; the solid-liquid separation method is an air floatation method.
The amount of dissolved oxygen in the first biochemical process and the second biochemical process is measured by a dissolved oxygen meter.
The details of the wastewater treated by the method of this example are shown in Table 1.
Example 2 to example 6
Example 2-example 6 the parameters of example 1 are shown in Table 1 for statistical details, and the rest are the same as example 1.
TABLE 1 statistical tables of the parameters of examples 1-6 and the properties of the treated wastewater
As can be seen from Table 1, the time for the first-order biochemical treatment is selected to be 2-7 hours, the retention time is too short, the microbial load is too high, on one hand, the dissolved oxygen is difficult to increase, and on the other hand, the treatment effect is rapidly reduced.
Example 7 to example 11
The statistical details of the parameters of example 1 in combination with examples 7-11 are given in Table 2, and the rest are the same as in example 1.
Table 2 example 1 statistical table of the properties of treated wastewater and parameters combining examples 7-11
As can be seen from Table 2, the time for secondary biochemical treatment was selected to be 5-12 h.
Example 12
This embodiment differs from embodiment 1 only in that: in the coagulation step, the medicament is formed by combining a coagulant and activated carbon, the addition amount of the coagulant (polyaluminium chloride, PAC) is 100ppm, and the mass ratio of the coagulant to the activated carbon is 2: 1.
the conditions of the wastewater treated by the present example were as follows: COD is less than 100mg/L, suspended matter (SS) is less than 50mg/L, and chroma is less than 20.
Example 13
This embodiment differs from embodiment 1 only in that: the subsequent treatment comprises the combination of iron-carbon micro-electrolysis and chemical oxidation, and the oxidizing substances adopted in the chemical oxidation are hydrogen peroxide (or oxidizing substances such as ozone, sodium hypochlorite and the like can be adopted according to actual conditions).
The conditions of the wastewater treated by the present example were as follows: COD is less than 100mg/L, suspended matter (SS) is less than 50mg/L, and chroma is less than 20.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The treatment method of the areca nut wastewater is characterized by comprising the following steps:
the first step is as follows: carrying out slag removal treatment on betel nut wastewater;
the second step is that: placing the areca nut wastewater after deslagging into a primary biochemical pool for carrying out first biochemical treatment to obtain a first mixed solution;
the third step: putting the first mixed solution into a primary sedimentation tank for primary sedimentation to obtain first sludge and first sedimentation liquid, wherein the first sludge is divided into two parts, the first part flows back to a primary biochemical tank, and the second part enters a sludge concentration tank for concentration treatment;
the fourth step: placing the first precipitation solution into a secondary biochemical pool for secondary biochemical treatment to obtain a second mixed solution;
the fifth step: putting the second mixed solution into a secondary sedimentation tank for secondary sedimentation to obtain second sludge and second sedimentation liquid, wherein the second sludge is divided into two parts, the first part flows back to the secondary biochemical tank, and the second part flows back to the primary biochemical tank;
and a sixth step: carrying out subsequent treatment on the second precipitation solution to obtain water meeting the discharge standard; the subsequent treatment comprises a combination of iron-carbon micro-electrolysis and chemical oxidation.
2. The method for treating areca catechu wastewater as claimed in claim 1, wherein the first biochemical treatment is performed under normal temperature and pressure conditions, the biochemical time is 2-7 hours, and the amount of dissolved oxygen is 1-2 mg/L; the first precipitation is carried out under the conditions of normal temperature and normal pressure, and the retention time of a precipitation tank is 4-5 h; the first-stage sedimentation tank at least has a clear water layer with the height of 1 m.
3. The method for treating areca catechu wastewater as claimed in claim 1, wherein the second biochemical treatment is performed under normal temperature and pressure conditions, the biochemical time is 5-12 hours, and the amount of dissolved oxygen is 2-4 mg/L; the first precipitation is carried out under the conditions of normal temperature and normal pressure, and the retention time of a precipitation tank is 4-5 h; the secondary sedimentation tank is at least provided with a clear water layer with the height of 1 m.
4. The method for treating areca nut wastewater according to claim 1, wherein an oxidizing substance used in the chemical oxidation is hydrogen peroxide or ozone.
5. The method for treating areca nut wastewater according to claim 1, wherein the amount of dissolved oxygen in both the first biochemical treatment and the second biochemical treatment is measured by a dissolved oxygen meter; the primary biochemical tank and the secondary biochemical tank are both connected with a fan.
6. The method for treating areca nut wastewater according to claim 1, wherein the deslagging in the first step is specifically: and a 100-mesh filter screen is adopted for deslagging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710097373.9A CN107043195B (en) | 2017-02-22 | 2017-02-22 | Treatment method of areca nut wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710097373.9A CN107043195B (en) | 2017-02-22 | 2017-02-22 | Treatment method of areca nut wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107043195A CN107043195A (en) | 2017-08-15 |
| CN107043195B true CN107043195B (en) | 2020-04-24 |
Family
ID=59544214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710097373.9A Active CN107043195B (en) | 2017-02-22 | 2017-02-22 | Treatment method of areca nut wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107043195B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111099792A (en) * | 2019-12-31 | 2020-05-05 | 深圳粤鹏环保技术股份有限公司 | Areca nut wastewater treatment method and system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010090551A1 (en) * | 2009-02-04 | 2010-08-12 | Kolesnikov Vladimir Petrovich | Plant for biochemically treating wastewater |
| CN101948215A (en) * | 2010-08-31 | 2011-01-19 | 宇星科技发展(深圳)有限公司 | Garbage leachate treatment process |
| CN102557345A (en) * | 2012-02-09 | 2012-07-11 | 湖南农业大学 | Treatment method of wastewater from processing of betel nuts |
| KR20130077170A (en) * | 2011-12-29 | 2013-07-09 | 허관 | Composition for the growth of plants comprising levan and bamboo vinegars |
| CN103991992A (en) * | 2014-04-10 | 2014-08-20 | 湖南农业大学 | Pre-treatment method for increasing biodegradability of areca seed boiling wastewater |
| CN104773919A (en) * | 2015-04-08 | 2015-07-15 | 常州大学 | Pharmaceutical wastewater advanced treatment system |
| CN105417894A (en) * | 2016-01-05 | 2016-03-23 | 宜兴市永创环保科技有限公司 | Treatment method for high-concentration wastewater difficult to degrade |
| CN105621818A (en) * | 2016-03-25 | 2016-06-01 | 湖南湘牛环保实业有限公司 | Method for treating industrial wastewater generated after betelnut infusing and stewing |
| CN205556393U (en) * | 2016-03-25 | 2016-09-07 | 湖南湘牛环保实业有限公司 | Sesame oil steep and waste water's processing apparatus of cooking |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011011134A2 (en) * | 2009-07-23 | 2011-01-27 | Lorenz Kenneth R | Water recovery systems and methods |
-
2017
- 2017-02-22 CN CN201710097373.9A patent/CN107043195B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010090551A1 (en) * | 2009-02-04 | 2010-08-12 | Kolesnikov Vladimir Petrovich | Plant for biochemically treating wastewater |
| CN101948215A (en) * | 2010-08-31 | 2011-01-19 | 宇星科技发展(深圳)有限公司 | Garbage leachate treatment process |
| KR20130077170A (en) * | 2011-12-29 | 2013-07-09 | 허관 | Composition for the growth of plants comprising levan and bamboo vinegars |
| CN102557345A (en) * | 2012-02-09 | 2012-07-11 | 湖南农业大学 | Treatment method of wastewater from processing of betel nuts |
| CN103991992A (en) * | 2014-04-10 | 2014-08-20 | 湖南农业大学 | Pre-treatment method for increasing biodegradability of areca seed boiling wastewater |
| CN104773919A (en) * | 2015-04-08 | 2015-07-15 | 常州大学 | Pharmaceutical wastewater advanced treatment system |
| CN105417894A (en) * | 2016-01-05 | 2016-03-23 | 宜兴市永创环保科技有限公司 | Treatment method for high-concentration wastewater difficult to degrade |
| CN105621818A (en) * | 2016-03-25 | 2016-06-01 | 湖南湘牛环保实业有限公司 | Method for treating industrial wastewater generated after betelnut infusing and stewing |
| CN205556393U (en) * | 2016-03-25 | 2016-09-07 | 湖南湘牛环保实业有限公司 | Sesame oil steep and waste water's processing apparatus of cooking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107043195A (en) | 2017-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101157510B (en) | Process for treating waste water produced during biofermentation method for producing penicillin and intermediate 6-APA process | |
| CN201033757Y (en) | Sewage water treatment system for fruit juice waste water | |
| WO2009124426A1 (en) | A method for treating pharmaceutical mixed wastewater in chemical industry park | |
| CN108996808B (en) | Biochemical combined treatment process and equipment for degradation-resistant concentrated water in steel industry | |
| CN101838083A (en) | Method for treating organic chemical wastewater having high COD and high concentration of sulfate ions | |
| CN103408201B (en) | The treatment process of trade effluent during silicon wafer mortar reclaims | |
| CN106242185B (en) | Banana pulp producing wastewater treatment | |
| CN112744912A (en) | Sulfur autotrophic denitrification biological filter, sewage treatment system and treatment method thereof | |
| CN105541005A (en) | Degradation-resistant salt chemical wastewater deep treatment method | |
| CN109502911A (en) | A kind of sewage water treatment method | |
| CN106745744B (en) | Sewage treatment method and sewage treatment system | |
| CN211712893U (en) | Difficult degradation industrial waste water treatment system | |
| CN107043195B (en) | Treatment method of areca nut wastewater | |
| CN210237408U (en) | Poisonous waste water treatment equipment of resin production | |
| CN217103412U (en) | Movable integrated sewage treatment system | |
| CN217103411U (en) | Mobile photoelectric complementary sewage deep purification system | |
| CN206328290U (en) | The aerobic collaboration processing cutting liquid waste plant of coagulation anaerobic hydrolysis | |
| CN108285248A (en) | A kind of leather-making waste water treatment method based on mud decrement | |
| CN105541023B (en) | A kind of oil refining wastewater circulation method for deeply treating water based on BESI technologies | |
| CN204999771U (en) | Refractory wastewater's processing system | |
| CN204897641U (en) | Fruit juice effluent disposal system | |
| CN211445406U (en) | Landfill leachate treatment device | |
| CN113292184A (en) | Mobile photoelectric complementary sewage deep purification system and method | |
| CN103253836B (en) | A kind of percolate deep purifying treatment unit and method | |
| CN112591979A (en) | Sewage treatment process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 410205 Hunan city high tech Development Zone Changsha Lulong Road No. 199 A Lugu business center building 307 room card No. -1016 Applicant after: Hunan billion environmental protection technology Co., Ltd. Address before: 410000 Hunan city high tech Development Zone Changsha Lulong Road No. 199 A Lugu business center building 307 room card No. -1016 Applicant before: Changsha Environmental Protection Technology Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |