CN113816562A - Modular kitchen waste wastewater treatment process and system - Google Patents
Modular kitchen waste wastewater treatment process and system Download PDFInfo
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- CN113816562A CN113816562A CN202111043434.6A CN202111043434A CN113816562A CN 113816562 A CN113816562 A CN 113816562A CN 202111043434 A CN202111043434 A CN 202111043434A CN 113816562 A CN113816562 A CN 113816562A
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- 239000010806 kitchen waste Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 219
- 239000010802 sludge Substances 0.000 claims abstract description 58
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- 238000007254 oxidation reaction Methods 0.000 claims abstract description 19
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- 230000010354 integration Effects 0.000 claims abstract description 15
- 239000002351 wastewater Substances 0.000 claims description 69
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 20
- 229910052698 phosphorus Inorganic materials 0.000 claims description 20
- 239000011574 phosphorus Substances 0.000 claims description 20
- 239000010865 sewage Substances 0.000 claims description 17
- 239000007787 solid Substances 0.000 claims description 16
- 239000003814 drug Substances 0.000 claims description 14
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- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
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- 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
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- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
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- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- 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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- 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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
Abstract
The invention discloses a modularized kitchen waste wastewater treatment process and a modularized kitchen waste wastewater treatment system, wherein the modularized kitchen waste wastewater treatment system comprises the following units: the device comprises a disc solid-liquid separator, an adjusting tank, a heating tank, a deoiling and deslagging centrifuge, a neutralization device, a sludge dewatering machine, a dephosphorization integrated device, a super oxidation device, a water distribution tank, an anaerobic tank, a multi-stage AO-MBR device and a disinfection and decoloration device. These units are connected by pipes. The system and the process provided by the invention have good energy-saving property and high resource recovery degree; the solid-liquid separation effect is good; the pollutant removing capacity is high, and the impact load resistance is strong; the engineering integration equipment degree is high, the rapid installation and implementation are convenient, and the investment and operation cost is low.
Description
Technical Field
The invention relates to the field of wastewater treatment, in particular to a modular kitchen waste wastewater treatment process and a modular kitchen waste wastewater treatment system.
Background
With the rapid development of economy in China, the living standard of the masses is continuously improved, and accordingly the domestic waste is greatly increased, wherein the kitchen waste is used as an important component of municipal domestic waste, according to relevant statistical research, the kitchen waste accounts for more than 50% of most municipal domestic waste, and due to the characteristics of dietary habits and habits in China, the kitchen waste is high in moisture content and organic matter proportion, waste water generated by the kitchen waste is rich in organic matters such as animal and vegetable oil, protein and amino acid, and the kitchen waste has the characteristics of high pollutant concentration, high salinity, various varieties, high treatment difficulty and the like, and is always a difficult problem in the industry.
Based on the basic characteristics of kitchen waste wastewater, if an ideal treatment effect is realized by using one treatment process alone, the treatment effect is hardly feasible, at present, the kitchen waste wastewater is treated by combining different technical methods according to the water quality characteristics of the kitchen waste wastewater, combined treatment is carried out, however, the components of the kitchen waste wastewater are complex, a widely applicable treatment system and process are difficult to find, in addition, the kitchen waste wastewater is generated in the squeezing process of a waste transfer station, the traditional civil engineering construction building environment-friendly building/structure is not applicable, the investment is large, the floor area is large, and a kitchen waste wastewater treatment system which is convenient to install and low in investment is urgently needed.
Disclosure of Invention
The invention aims to provide a method for recycling resources, which has high recycling degree; the solid-liquid separation effect is good; the pollutant removing capacity is high, and the impact load resistance is strong; the modularized kitchen waste wastewater treatment process and the system thereof have the advantages of high engineering integration equipment degree, convenience for quick installation and implementation and low investment and operation cost.
In order to solve the above problems, the present invention provides the following technical solutions:
a modular kitchen waste wastewater treatment process comprises the following specific steps:
step 1: enabling sewage generated by the kitchen waste to enter the disc solid-liquid separator, screening out large-particle sludge with the particle size larger than mm, enabling the treated sewage to enter the regulating tank, and lifting the sewage into the heating tank by a pump;
step 2: sewage in the heating tank enters the oil and slag removal centrifugal machine through a variable frequency pump, three phases of water, oil and solid in the sewage are separated in a layering mode through high-speed rotation of the oil and slag removal centrifugal machine, the obtained oil is recycled, and the obtained dry sludge is transported to the outside;
and step 3: the water phase obtained by the oil and slag removal centrifuge enters the neutralization device, kitchen waste water is generally acidic, and an alkaline medicament is added by a medicament feeding device in the neutralization device to adjust the pH value of the waste water;
and 4, step 4: the neutralized wastewater enters a sludge dewatering machine, a conditioner needs to be added into the sludge dewatering machine, solid suspended matters in the wastewater are further removed by the sludge dewatering machine, and the obtained dry sludge is transported and disposed;
and 5: the wastewater treated by the sludge dewatering machine enters the phosphorus removal integrated device, the phosphorus removal integrated device is integrated with a medicament adding system, and solid suspended matters in the wastewater are further removed by the phosphorus removal integrated device;
step 6: the wastewater treated by the dephosphorization integrated device enters a super oxidation device, and the refractory organic pollutants are oxidized into small molecular substances based on a high-frequency electrochemical principle, so that the pollutants in the wastewater are removed and the biodegradability of the wastewater is improved;
and 7: the water discharged from the super oxidation device enters the water distribution tank, and multiple strands of water are mixed in the water distribution tank for tempering;
and 8: the wastewater after the water distribution tank is tempered enters the anaerobic tank, pollutants in the wastewater are converted into biogas and microorganism growth under the anaerobic fermentation effect, and the pollutants are greatly removed;
and step 9: the wastewater treated by the anaerobic tank enters the multi-stage AO-MBR device, most pollutants in the wastewater can be removed by the device, including organic pollutants, ammonia nitrogen and the like, one part of the wastewater treated by the multi-stage AO-MBR device flows back to the water distribution tank, and the other part of the wastewater flows to the disinfection and decoloration device, the disinfection and decoloration device disinfects and decolors the wastewater, and the wastewater treated by the disinfection and decoloration device can reach the standard and be discharged.
Preferably, the disk solid-liquid separator can select screens with different sizes according to the actual water quality condition so as to filter solid impurities with different particle sizes.
Preferably, the alkaline agent used by the chemical dosing device in the neutralization device is sodium hydroxide or calcium hydroxide, and the use of the calcium hydroxide helps to improve the dehydration performance of the subsequent sludge dehydrator.
Preferably, the pH value of the effluent is adjusted to be between the pH value of the effluent and the pH value of the effluent after the reaction of the neutralization device.
Preferably, the water used for preparing the medicament in the neutralization device is the effluent of the dephosphorization integration device, which is beneficial to saving the use of tap water.
Preferably, the conditioner used by the sludge dewatering machine is cationic polyacrylamide ionicity.
Preferably, the integrated phosphorus removal device is provided with an overrunning pipe, and when the content of suspended matters in the effluent of the sludge dewatering machine meets the requirement of anaerobic water inflow, a chemical is not added into the integrated phosphorus removal device.
Preferably, the anaerobic tank is provided with an anaerobic effluent settling tank which is communicated with the water outlet of the anaerobic tank, so that the effluent of the anaerobic tank is prevented from running mud, and the stable operation of the subsequent process is ensured.
The invention also provides a modular kitchen waste wastewater treatment system which is characterized by comprising a disc solid-liquid separator, an adjusting tank, a heating tank, a deoiling and deslagging centrifuge, a neutralization device, a sludge dewatering machine, a dephosphorization integration device, a super oxidation device, a water distribution tank, an anaerobic tank, a multi-stage AO-MBR device and a disinfection and decoloration device which are sequentially connected;
the disc solid-liquid separator is connected with the water inlet of the regulating tank through a water outlet, the water outlet of the regulating tank is connected with the water inlet of the heating tank through a pump, the water outlet of the heating tank is connected with the water inlet of the oil and slag removing centrifuge through a pump, the water outlet of the oil and slag removal centrifuge is connected with the water inlet of the neutralization device, the water outlet of the neutralization device is connected with the water inlet of the sludge dewatering machine through a pump, the water outlet of the sludge dewatering machine is connected with the water inlet of the phosphorus removal integrated device, the water outlet of the dephosphorization integration device is connected with the water inlet of the super oxidation device, the water outlet of the super oxidation device is connected with the water inlet of the water distribution tank, the water outlet of the water distribution tank is connected with the water inlet of the anaerobic tank through a pump, and the multistage AO-MBR device comprises a plurality of water inlets, a water outlet and an internal circulating water outlet; the water inlets are connected with a water outlet of an anaerobic tank with a pump, the water outlet of the internal circulating water is connected with a water inlet of the internal circulating water of the water distribution tank, the water outlet of the multistage AO-MBR device is connected with a water inlet of the disinfection and decoloration device, and the water outlet of the disinfection and decoloration device is connected with an external discharge pipe network.
Preferably, the multi-stage AO-MBR device and the water distribution tank further comprise an internal circulating water outlet, and the internal circulating water outlet of the multi-stage AO-MBR device is connected with an internal circulating water inlet of the water distribution tank.
By adopting the modular kitchen waste wastewater treatment system and the modular kitchen waste wastewater treatment process, the finally treated wastewater can reach the discharge standard (GB/T31962-2015) of wastewater discharged into urban sewers.
The beneficial effects of the invention are as follows:
1. the invention has good energy-saving property and high resource recovery degree:
(1) the neutralization device is used for preparing an alkali medicament and the effluent of the dephosphorization integration device is used for replacing tap water, so that the water resource is saved, and the treatment load of a subsequent system is also reduced;
(2) the biogas generated by anaerobic reaction can be utilized, the biogas energy is reasonably recovered, and the energy-saving property is good;
(3) the grease obtained by the oil and slag removing centrifuge has high purity, is suitable for recycling, and is synthesized into biodiesel after being treated;
(4) the sludge can be recycled, the organic matter content of the sludge obtained by the whole system is high, and the sludge composting treatment method is suitable for sludge composting treatment and effectively recycles the sludge.
2. The invention has good solid-liquid separation effect:
(1) the disc solid-liquid separator is adopted to remove large granular substances in the wastewater, the oil and slag removal centrifuge is used to remove 50-60% of solid suspended substances, the sludge dewatering machine is combined to continuously remove 40-50% of solid suspended substances, and the phosphorus removal integrated device is used as a standby process unit to ensure that the suspended substances in the effluent are less than 300 mg/L;
(2) the effluent of the anaerobic tank is provided with the anaerobic effluent settling tank, so that the solid-liquid separation effect is good, the anaerobic effluent is effectively prevented from running mud, and the treatment effect of a subsequent system is ensured;
(3) the tail end of the multi-stage AO-MBR device is provided with an MBR system, the solid-liquid separation of sewage can be realized by the physical interception capacity of the membrane, and the effluent quality is stable.
3. The invention has good pollutant removing effect and strong impact load resistance:
(1) the water quality of the inlet water of the anaerobic tank is stable, the stable and efficient operation of the anaerobic sludge process corresponding to the anaerobic tank is ensured, and the anaerobic process pollutant treatment efficiency is high and the volume load can reach 8-15 kgCOD/m through the verification of related experiments3D, the sludge load can reach 0.5-1.0 kgCOD/kgTSS d;
(2) the multistage AO-MBR device adopts multistage anoxic-aerobic processes to be connected in series, sewage is firstly subjected to denitrification in an anoxic tank and then subjected to nitrification in an aerobic tank, and nitrified liquid in the aerobic tank flows back to the front-end anoxic tank, so that the denitrification effect is further improved, in addition, the impact load of each section of microorganism is reduced by adopting a multi-section water inlet mode, the process operation is more stable and efficient, and experiments prove that the multistage AO-MBR device has high treatment efficiency and the volume load can reach 2kgCOD/m3D, the sludge load can reach 0.2-0.25 kgCOD/kgTSS d.
4. The invention has high engineering integration equipment degree, convenient and fast installation and implementation and low investment and operation cost.
(1) The system is prepared in a modular form, is simple and convenient to construct and install, has less civil construction, can be constructed according to local conditions by combining the environment and ecological landscape, and has low investment cost;
(2) the intelligent degree of this system is high, and the system is high-efficient stable, and the medicament is used rationally high-efficiently, and the operating cost is low.
Drawings
FIG. 1 is a schematic flow diagram of a modular kitchen waste wastewater treatment process provided by the invention;
fig. 2 is a schematic structural diagram of a modular kitchen waste wastewater treatment system provided by the invention.
The numbers in the figure are as follows:
1. a disc solid-liquid separator; 2. a regulating tank; 3. a heating tank; 4. a deoiling and deslagging centrifuge; 5. a neutralization device; 6. a sludge dewatering machine; 7. a dephosphorization integration device; 8. a super oxidation unit; 9. a water distribution tank; 10. an anaerobic jar; 11. a multi-stage AO-MBR device; 12. a sterilization and decoloration device.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
The invention discloses a modular kitchen waste wastewater treatment process as shown in figure 1, which comprises the following specific steps:
step 1: sewage generated by the kitchen waste enters the disc solid-liquid separator 1, large-particle sludge with the particle size larger than 5mm is screened out, the treated sewage enters the regulating tank 2, and the sewage is lifted to the heating tank 3 by a pump;
step 2: sewage in the heating tank 3 enters the oil and slag removal centrifuge 4 through a variable frequency pump, three phases of water, oil and solid in the sewage are separated in a layered mode through high-speed rotation of the oil and slag removal centrifuge 4, the obtained grease is recycled, and the obtained dry sludge is transported to an external place;
and step 3: the water phase obtained by the oil and slag removal centrifuge 4 enters the neutralization device 5, the kitchen waste wastewater is generally acidic, and an alkaline medicament is added by a medicament feeding device in the neutralization device 5 to adjust the pH value of the wastewater;
and 4, step 4: the neutralized wastewater enters a sludge dewatering machine 6, a conditioner is required to be added into the sludge dewatering machine 6, solid suspended matters in the wastewater are further removed by the sludge dewatering machine 6, and the obtained dry sludge is transported outside;
and 5: the wastewater treated by the sludge dewatering machine 6 enters the phosphorus removal integrated device 7, the phosphorus removal integrated device 7 is integrated with a medicament adding system, and solid suspended matters in the wastewater are further removed by the phosphorus removal integrated device 7;
step 6: the wastewater treated by the dephosphorization integrated device 7 enters a super oxidation device 8, and the refractory organic pollutants are oxidized into small molecular substances based on the high-frequency electrochemical principle, so that the pollutants in the wastewater are removed and the biodegradability of the wastewater is improved;
and 7: the water discharged from the super oxidation device 8 enters the water distribution tank 9, and a plurality of strands of water are mixed in the water distribution tank 9 for tempering;
and 8: the wastewater after the water distribution tank 9 is conditioned enters the anaerobic tank 10, and pollutants in the wastewater are converted into biogas and microorganisms through the anaerobic fermentation effect, so that the pollutants are greatly removed;
and 9, the wastewater treated by the anaerobic tank 10 enters the multistage AO-MBR device 11, most pollutants in the wastewater, including organic pollutants, ammonia nitrogen and the like, can be removed by the device, a part of the wastewater treated by the multistage AO-MBR device 11 flows back to the water distribution tank 9, a part of the wastewater flows back to the disinfection and decoloration device 12, the disinfection and decoloration device 12 disinfects and decolors the wastewater, and the wastewater treated by the disinfection and decoloration device 12 can reach the standard and be discharged.
Furthermore, the disc solid-liquid separator 1 can select screens with different sizes according to the actual water quality condition so as to filter solid impurities with different particle sizes.
Further, the alkaline agent used by the chemical dosing device in the neutralization device 5 is sodium hydroxide or calcium hydroxide, and the use of calcium hydroxide helps to improve the dehydration performance of the subsequent sludge dewatering machine.
Further, the pH value of the effluent is adjusted to 8-9 after the neutralization device 5 reacts.
Further, the water used for preparing the medicament in the neutralization device 5 is the effluent of the phosphorus removal integrated device, which is beneficial to saving the use of tap water.
Further, the conditioner used by the sludge dewatering machine 6 is cationic polyacrylamide with 50 ionicity.
Further, dephosphorization integration device 7 is provided with surpassing the pipe, when sludge dewaterer 6 goes out water suspended solid content and reaches the anaerobism requirement of intaking, add no medicament in dephosphorization integration device 7.
Further, the anaerobic tank 9 is provided with an anaerobic effluent settling tank which is communicated with the water outlet of the anaerobic tank, so that the effluent of the anaerobic tank is prevented from running mud, and the stable operation of the subsequent process is ensured.
As shown in fig. 2, a modular kitchen waste wastewater treatment system comprises a disc solid-liquid separator 1, an adjusting tank 2, a heating tank 3, a deoiling and deslagging centrifuge 4, a neutralization device 5, a sludge dewatering machine 6, a dephosphorization integration device 7, a super oxidation device 8, a water distribution tank 9, an anaerobic tank 10, a multi-stage AO-MBR device 11 and a disinfection and decoloration device 12 which are sequentially connected;
the disc solid-liquid separator 1 is connected with the 2 water inlets of the regulating pool through a water outlet, the 2 water outlets of the regulating pool are connected with the 3 water inlets of the heating tank through a pump, the 3 water outlets of the heating tank are connected with the water inlet of the oil and slag removing centrifugal machine 4 through a pump, the 4 water outlets of the oil and slag removing centrifugal machine are connected with the water inlet of the neutralization device 5, the water outlet of the neutralization device 5 is connected with the 6 water inlet of the sludge dewatering machine 6 through a pump, the 6 water outlet of the sludge dewatering machine is connected with the water inlet of the phosphorus removal integrated device 7, the water outlet of the phosphorus removal integrated device 7 is connected with the water inlet of the super oxidation device 8, the water outlet of the super oxidation device 8 is connected with the water inlet of the water distribution tank 9, the water outlet of the water distribution tank 9 is connected with the water inlet of the anaerobic tank 10 through a pump, and the multistage AO-MBR device 11 comprises a plurality of water inlets, A water outlet and an internal circulating water outlet; the water inlets are connected with a water outlet of an anaerobic tank 10 with a pump, a water outlet of the internal circulating water is connected with a water inlet of the internal circulating water of a water distribution tank 9, a water outlet of the multistage AO-MBR device 11 is connected with a water inlet of a disinfection and decoloration device 12, and a water outlet of the disinfection and decoloration device 12 is connected with an external discharge pipe network.
The multi-stage AO-MBR device 11 and the water distribution tank 9 further comprise an internal circulating water outlet, and the internal circulating water outlet of the multi-stage AO-MBR device 11 is connected with an internal circulating water inlet of the water distribution tank 9.
Example 1
A modular kitchen waste wastewater treatment process and a system thereof are divided into the following units: a disc solid-liquid separator 1, an adjusting tank 2, a heating tank 3, an oil and slag removing centrifuge 4, a neutralization device 5, a sludge dewatering machine 6, a dephosphorization integration device 7, a super oxidation device 8, a water distribution tank 9, an anaerobic tank 10, a multi-stage AO-MBR device 11 and a disinfection and decoloration device 12. The units are connected through pipelines to form the treatment system.
Specifically, the disc solid-liquid separator 1 is a solid-liquid separation device and is provided with a water inlet, a water outlet and a slag outlet, and the water outlet is connected with the regulating tank 2 through a pipeline.
The adjusting tank 2 is a wastewater homogenizing unit, the size of the wastewater homogenizing unit is matched with the wastewater change period, and the bottom of the wastewater homogenizing unit is provided with a stirring air pipe and a fan.
The heating tank 3 is used for heating wastewater, a heating heat tracing side pipe is arranged in the heating tank, a stirrer is arranged at the top of the heating tank and provided with a water inlet and a water outlet, and the water inlet is connected with the regulating tank 2 through a pipeline by a pump.
The oil and slag removing centrifuge 4 is a water, oil and solid three-phase separation unit and is provided with a water inlet, a water outlet, a mud outlet, an oil outlet and a mud outlet, wherein the water inlet is connected with the water outlet of the heating tank 3 through a pipeline by a pump.
The neutralization device 5 is used for adjusting the pH value of the wastewater, comprises a dosing device and a neutralization reaction area, and is provided with a water inlet, a water outlet and a sludge inlet, wherein the water inlet is connected with the water outlet of the oil and slag removal centrifugal machine through a pipeline.
The sludge dewatering machine 6 is a sludge dewatering unit, is provided with a conditioner dosing device, is connected by a pipeline, and is provided with a water inlet, a water outlet and a sludge outlet, wherein the water inlet is connected with the water outlet of the neutralization device by a pump through a pipeline.
The dephosphorization integrated device 7 is a wastewater coagulation and precipitation unit, integrates a coagulant dosing system and a flocculant dosing system, comprises a coagulation reaction area, a flocculation reaction area, a precipitation area and a clear water area, and is provided with a water inlet, a water outlet and a sludge outlet, wherein the water inlet is connected with the sludge dewatering machine 6 through a pipeline.
The super-oxidation device 8 is a pre-biochemical module and is provided with a water inlet and a water outlet, and the water inlet is communicated with the water outlet of the dephosphorization integration device 7.
The water distribution tank 9 is an anaerobic water inlet water quality distribution unit, is provided with a centrifugal pump for internal circulation stirring, and is provided with a pretreated water outlet water inlet, an internal circulation water inlet and a water outlet, wherein the pretreated water outlet water inlet is connected with the water outlet of the sludge dewatering machine 6 through a pipeline.
The anaerobic tank 10 is a wastewater anaerobic microorganism treatment unit and is provided with a water inlet, a water outlet and a methane outlet, and the water inlet is connected with the water outlet of the water distribution tank through a pipeline by a pump.
The multistage AO-MBR device 11 is a wastewater anoxic and aerobic microorganism treatment and membrane filtration unit and is divided into an anoxic tank, an aerobic tank, a membrane treatment tank and a clean water tank, a plurality of groups of anoxic tanks and the aerobic tank are connected in series, the anoxic tank is provided with a stirring air pipe, the aerobic tank is provided with an aeration pipe and is provided with efficient fixed bed flat plate packing, the device is integrated with an air blower and a nitrifying liquid backflow submersible pump, the membrane treatment tank is provided with a membrane treatment system, the multistage AO-MBR device 11 is provided with a plurality of water inlets, water outlets and internal circulation water outlets, the plurality of water inlets are connected with the water outlet of the anaerobic tank 10 through a pipeline by a pump, and the internal circulation water outlet is connected with the internal circulation water inlet of the water distribution tank 9 through a pipeline.
The disinfection and decoloration device 12 is divided into a dosing area and a reaction area and is provided with a water inlet and a water outlet, the water inlet is connected with the water outlet of the multi-stage AO-MBR device 11 through a pipeline, and the water outlet is connected with an external drainage pipe network.
Example 2
The invention is applied to a leachate treatment demonstration project of a certain kitchen waste transfer station in Shanghai, the daily treatment capacity is 100T, the treated leachate can reach the drainage Standard for urban sewer (GB/T31962-2015), and the treatment effect of each process unit is shown as the following table:
TABLE 1 operating Water quality data of percolate treatment demonstration project of certain kitchen waste transfer station
Note: the table above is the average value during the run.
As can be seen from the data in Table 1, the invention has good treatment effect on the kitchen waste wastewater, and most of pollutants are removed and can be discharged after reaching the standard.
In conclusion, compared with the prior art, the system and the process provided by the invention have the advantages of good energy saving performance and high resource recovery degree; the solid-liquid separation effect is good; the pollutant removing capacity is high, and the impact load resistance is strong; the engineering integration equipment degree is high, the rapid installation and implementation are convenient, and the investment and operation cost is low.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the referenced apparatus or component must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention should be covered by the scope of the present invention.
Claims (10)
1. The modular kitchen waste wastewater treatment process is characterized by comprising the following specific steps:
step 1: sewage generated by kitchen waste enters the disc solid-liquid separator (1), large-particle sludge with the particle size larger than 5mm is screened out, the treated sewage enters the regulating tank (2), and the sewage is lifted to the heating tank (3) by a pump;
step 2: sewage in the heating tank (3) enters the oil and slag removal centrifugal machine (4) through a variable frequency pump, three phases of water, oil and solid in the sewage are separated in a layering mode through high-speed rotation of the oil and slag removal centrifugal machine (4), the obtained grease is recycled, and the obtained dry sludge is transported to the outside;
and step 3: the water phase obtained by the oil and slag removal centrifuge (4) enters the neutralization device (5), the kitchen waste wastewater is generally acidic, and an alkaline agent is added by the chemical dosing device in the neutralization device (5) to adjust the pH value of the wastewater;
and 4, step 4: the neutralized wastewater enters the sludge dewatering machine (6), a conditioner is required to be added into the sludge dewatering machine (6), solid suspended matters in the wastewater are further removed by the sludge dewatering machine (6), and the obtained dry sludge is transported outside;
and 5: the wastewater treated by the sludge dewatering machine (6) enters the phosphorus removal integrated device (7), the phosphorus removal integrated device (7) is integrated with a medicament adding system, and solid suspended matters in the wastewater are further removed by the phosphorus removal integrated device (7);
step 6: the wastewater treated by the dephosphorization integrated device (7) enters a super oxidation device (8), and on the basis of a high-frequency electrochemical principle, refractory organic pollutants are oxidized into small molecular substances, so that pollutants in the wastewater are removed and the biodegradability of the wastewater is improved;
and 7: the water discharged from the super oxidation device (8) enters the water distribution tank (9), and multiple strands of water are mixed in the water distribution tank (9) for tempering;
and 8: the wastewater after the water distribution tank (9) is tempered enters the anaerobic tank (10), and pollutants in the wastewater are converted into biogas and growth of microorganisms under the action of anaerobic fermentation, so that the pollutants are greatly removed;
and 9, the wastewater treated by the anaerobic tank (10) enters the multistage AO-MBR device (11), most pollutants in the wastewater can be removed by the device, including organic pollutants, ammonia nitrogen and the like, one part of the wastewater treated by the multistage AO-MBR device (11) flows back to the water distribution tank (9) and the other part of the wastewater flows back to the disinfection and decoloration device (12), the disinfection and decoloration device (12) disinfects and decolors the wastewater, and the wastewater treated by the disinfection and decoloration device (12) can reach the standard and be discharged.
2. The modular kitchen waste and wastewater treatment process according to claim 1, characterized in that the disc solid-liquid separator (1) can select screens of different sizes according to actual water quality conditions so as to filter solid impurities of different particle sizes.
3. The modular kitchen waste and wastewater treatment process according to claim 1, wherein the alkaline agent used by the chemical dosing device in the neutralization device (5) is sodium hydroxide or calcium hydroxide, and the use of calcium hydroxide helps to improve the dehydration performance of the subsequent sludge dehydrator.
4. The modular kitchen waste and wastewater treatment process according to any one of claims 1 or 3, characterized in that the pH of the effluent is adjusted to 8-9 after the neutralization device (5) reacts.
5. The modular kitchen waste wastewater treatment process according to claim 3, wherein water used for preparing a medicament in the neutralization device (5) is discharged from the dephosphorization integrated unit, and is beneficial to saving tap water.
6. The modular kitchen waste and wastewater treatment process according to claim 3, characterized in that the conditioner used by the sludge dewatering machine (6) is cationic polyacrylamide (50 ionicity).
7. The modular kitchen waste wastewater treatment process according to claim 3, characterized in that the integrated phosphorus removal device (7) is provided with an overrunning pipe, and when the suspended matter content of the effluent of the sludge dewatering machine (6) meets the anaerobic water inlet requirement, no medicament is added into the integrated phosphorus removal device (7).
8. The modular kitchen waste and wastewater treatment process according to claim 3, characterized in that the anaerobic tank (9) is provided with an anaerobic effluent settling tank which is communicated with an anaerobic tank water outlet to prevent the anaerobic tank effluent from running mud and ensure the stable operation of the subsequent process.
9. The utility model provides a modularization kitchen garbage effluent disposal system which characterized in that, includes following unit: the device comprises a disc solid-liquid separator (1), an adjusting tank (2), a heating tank (3), a deoiling and deslagging centrifuge (4), a neutralization device (5), a sludge dewatering machine (6), a dephosphorization integration device (7), a super oxidation device (8), a water distribution tank (9), an anaerobic tank (10), a multi-stage AO-MBR device (11) and a disinfection and decoloration device (12), wherein the units are connected in sequence;
the disc solid-liquid separator (1) is connected with the water inlet of the adjusting tank (2) through a water outlet, the water outlet of the adjusting tank (2) is connected with the water inlet of the heating tank (3) through a pump, the water outlet of the heating tank (3) is connected with the water inlet of the oil and slag removing centrifugal machine (4) through a pump, the water outlet of the oil and slag removing centrifugal machine (4) is connected with the water inlet of the neutralization device (5), the water outlet of the neutralization device (5) is connected with the water inlet of the sludge dewatering machine (6) through a pump, the water outlet of the sludge dewatering machine (6) is connected with the water inlet of the phosphorus removal integrated device (7), the water outlet of the phosphorus removal integrated device (7) is connected with the water inlet of the super oxidation device (8), the water outlet of the super oxidation device (8) is connected with the water inlet of the water distribution tank (9), the water outlet of the water distribution tank (9) is connected with the water inlet of the anaerobic tank (10) through a pump, the multi-stage AO-MBR device (11) comprises a plurality of water inlets, water outlets and an internal circulating water outlet; the multiple water inlets are connected with a water outlet of an anaerobic tank (10) with a pump, the water outlet of the internal circulating water is connected with a water inlet of the internal circulating water of the water distribution tank (9), the water outlet of the multistage AO-MBR device (11) is connected with a water inlet of a disinfection and decoloration device (12), and the water outlet of the disinfection and decoloration device (12) is connected with an external drainage pipe network.
10. The modular kitchen waste wastewater treatment system is characterized in that the multistage AO-MBR device (11) and the water distribution tank (9) further comprise an internal circulating water outlet, and the internal circulating water outlet of the multistage AO-MBR device (11) is connected with an internal circulating water inlet of the water distribution tank (9).
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| US20200346959A1 (en) * | 2016-04-01 | 2020-11-05 | Chinese Research Academy Of Environmental Sciences | Method for reducing pollutant discharge in phenol and acetone production |
| RU2654757C1 (en) * | 2017-05-24 | 2018-05-22 | федеральное государственное бюджетное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" | Wastewater treatment system |
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Application publication date: 20211221 |