CN112777879A - Circulating system for biogas slurry purification ecology and control method - Google Patents
Circulating system for biogas slurry purification ecology and control method Download PDFInfo
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- CN112777879A CN112777879A CN202110138168.9A CN202110138168A CN112777879A CN 112777879 A CN112777879 A CN 112777879A CN 202110138168 A CN202110138168 A CN 202110138168A CN 112777879 A CN112777879 A CN 112777879A
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- 239000002002 slurry Substances 0.000 title claims abstract description 169
- 238000000746 purification Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 18
- 241000195493 Cryptophyta Species 0.000 claims abstract description 419
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 256
- 238000004519 manufacturing process Methods 0.000 claims abstract description 65
- 238000004064 recycling Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 186
- 230000005791 algae growth Effects 0.000 claims description 33
- 238000001914 filtration Methods 0.000 claims description 31
- 238000010992 reflux Methods 0.000 claims description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 235000013619 trace mineral Nutrition 0.000 claims description 7
- 239000011573 trace mineral Substances 0.000 claims description 7
- 238000012258 culturing Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 8
- 238000000855 fermentation Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 239000007791 liquid phase Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 241000196324 Embryophyta Species 0.000 description 22
- 230000012010 growth Effects 0.000 description 9
- 239000003501 hydroponics Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 235000015097 nutrients Nutrition 0.000 description 3
- 240000003826 Eichhornia crassipes Species 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 240000008436 Ipomoea aquatica Species 0.000 description 1
- 235000019004 Ipomoea aquatica Nutrition 0.000 description 1
- 240000008415 Lactuca sativa Species 0.000 description 1
- 235000003228 Lactuca sativa Nutrition 0.000 description 1
- 244000207740 Lemna minor Species 0.000 description 1
- 235000006439 Lemna minor Nutrition 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000001855 Portulaca oleracea Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
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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
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/001—Upstream control, i.e. monitoring for predictive control
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
-
- 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
- C02F2209/40—Liquid flow rate
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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Abstract
A biogas slurry purification ecological recyclable system and a control method thereof are provided, the recyclable system comprises: the device comprises a biogas slurry feeding unit, an algae water culture treatment unit, a water production unit and a concentrated algae unit; the output end of the biogas slurry feeding unit is connected with the input end of the algae water culture processing unit; the output end of the algae water culture processing unit is respectively connected with the input end of the water production unit and the input end of the concentrated algae unit; the produced water circulation output pipe is connected with the biogas slurry feeding unit; the algae circulating output pipe is connected to the input end of the algae water culture processing unit; the control method realizes the biogas slurry recyclable purification function through the steps (1) to (4); the recyclable system can efficiently treat biogas slurry generated by anaerobic fermentation, effectively utilize most of carbon sources and nitrogen sources in the biogas slurry, has high automatic restoration and regulation capability on plants and can realize recycling ecological operation; meanwhile, the circulating system is stable in operation, hydroponic plants, liquid phase and algae substances can be smoothly separated, and the harm of the biogas slurry to the environment is reduced.
Description
Technical Field
The invention relates to the fields of environmental engineering, agricultural planting and biological energy, in particular to a circulating system for biogas slurry purification ecology and a control method.
Background
The biogas slurry is fermentation liquor generated by anaerobic fermentation of organic garbage wastes, and is harmful to the environment if being discharged randomly, so that certain economic benefit can be brought by effective utilization. In recent years, the technology of hydroponics of plants and algae with biogas slurry has been introduced to the treatment of sewage and the utilization of biogas slurry, and related research is increasing, and the research focuses on the purification effect of duckweed, water hyacinth, water spinach, lettuce, rice, water hyacinth and the like on biogas slurry. The biogas slurry is rich in carbon sources, nitrogen sources and the like, and the algae are various in species and strong in adaptability, can grow in various ecological systems, and nutrients in the biogas slurry just provide nutrients for the growth of the algae. Meanwhile, the algae biogas slurry purification system can reduce nutrient components and organic matters in the biogas slurry, but the plant remediation system is used for treating the highly eutrophic sewage fermentation liquid, so that the stability and the purification efficiency are insufficient, and the research on the biogas slurry is still in an exploration stage.
Disclosure of Invention
The invention aims to provide a circulating system for purifying ecology by biogas slurry, which forms a circulating system by a biogas slurry feeding unit, an algae water culture treatment unit, a water production unit, a concentrated algae unit, a water production circulating output pipe and an algae circulating output pipe.
The invention also provides a control method of the biogas slurry purification ecological recyclable system, which realizes the biogas slurry recyclable purification function through the steps (1) to (4).
In order to achieve the purpose, the invention adopts the following technical scheme:
a biogas slurry purification ecological recyclable system, comprising: the device comprises a biogas slurry feeding unit, an algae water culture treatment unit, a water production unit and a concentrated algae unit;
the output end of the biogas slurry feeding unit is connected with the input end of the algae water culture processing unit; the output end of the algae water culture processing unit is respectively connected with the input end of the water production unit and the input end of the concentrated algae unit; the water production unit is provided with a water production circulation output pipe and a water outlet output pipe, and the water production circulation output pipe is connected to the biogas slurry feeding unit; the concentrated algae unit is provided with an algae circulating output pipe and an algae output pipe; the algae circulating output pipe is connected to the input end of the algae water culture processing unit;
the biogas slurry feeding unit is used for outputting biogas slurry to the algae water culture treatment unit;
the algae water culture treatment unit sequentially comprises the following components in the output direction of biogas slurry: a water planting device and an algae reaction device;
the water planting device is provided with water planting plants; the hydroponic planting device is used for receiving the biogas slurry output by the biogas slurry feeding unit and providing biogas slurry for hydroponic liquid at a hydroponic plant;
the output end of the algae reaction device is connected with the input end of the water production unit and the input end of the concentrated algae unit; the algae reaction device is used for receiving the hydroponic liquid with the biogas slurry output by the hydroponic planting device and culturing algae by using the hydroponic liquid; after filtering, outputting the hydroponic liquid to the water production unit, and outputting the algae to the concentrated algae unit;
the water production circulation output pipe is used for outputting the hydroponic liquid of the algae reaction device to the biogas liquid feeding unit; the water outlet pipe is used for discharging the water culture solution of the algae reaction device;
the algae circulation output pipe is used for outputting the algae of the algae reaction device to the algae reaction device; the algae output pipe is used for discharging the algae in the algae reaction device.
Preferably, the method further comprises the following steps: an air intake unit;
the air inlet unit is arranged on the algae circulation output pipe and used for providing oxygen or air.
Preferably, the biogas slurry feeding unit comprises: a biogas slurry water inlet pump, a water inlet flow meter and a pipeline mixer.
Preferably, the algae reaction device comprises the following components in sequence along the output direction of the biogas slurry: the algae growth reaction device and the algae collection and filtration device;
the input end of the algae growth reaction device is connected with the output end of the water planting device, and the output end of the algae growth reaction device is connected with the input end of the algae collection and filtration device; the output end of the algae collecting and filtering device is respectively connected with the water producing unit and the concentrated algae unit;
the algae growth reaction device is used for receiving the hydroponic liquid with the biogas slurry output by the hydroponic planting device and culturing algae by using the hydroponic liquid;
the algae collecting and filtering device has a filtering function and is used for outputting the hydroponic liquid output by the algae growth reaction device to the water production unit and outputting the algae output by the algae growth reaction device to the concentrated algae unit.
Preferably, the water production unit comprises: the water production circulation output pipe, the water outlet output pipe, the clear liquid water pump and the clear liquid water outlet flow meter;
the water outlet pipe is used for sequentially connecting the algae water culture processing unit, the clear liquid water pump and the clear liquid water outlet flowmeter; one end of the produced water circulation output pipe is connected with a connecting pipeline between the clear liquid water pump and the clear liquid water outlet flow meter, and the other end of the produced water circulation output pipe is connected with the biogas slurry feeding unit.
Preferably, the concentrated algae unit comprises: the algae circulating output pipe, the algae output water pump and the algae output flowmeter;
the algae output pipe sequentially connects the algae water culture processing unit, the algae output water pump and the algae output flowmeter; one end of the algae circulating output pipe is connected with a connecting pipeline between the algae outlet water pump and the algae outlet flowmeter, and the other end of the algae circulating output pipe is connected with the input end of the algae water culture processing unit.
Preferably, the biogas slurry feeding unit is provided with a water inlet control valve;
a clear liquid outlet valve is arranged on a connecting pipeline between the algae water culture processing unit and the water production unit; the water production circulation output pipe is provided with a clear liquid reflux valve;
a connecting pipeline between the algae water culture processing unit and the concentrated algae unit is provided with a concentrated algae liquid outlet valve; the algae circulation output pipe is provided with an algae liquid reflux valve;
and a water culture solution outlet valve is arranged on a connecting pipeline between the water culture planting device and the algae reaction device.
A method for controlling a circulating system for biogas slurry purification ecology comprises the following steps:
step (1): the biogas slurry feeding unit outputs biogas slurry to the algae water culture treatment unit;
step (2): the hydroponic planting device receives the biogas slurry output by the biogas slurry feeding unit and provides biogas slurry for hydroponic liquid of hydroponic plants; outputting the hydroponic liquid with the biogas slurry of the hydroponic planting device to an algae reaction device;
and (3): the algae reaction device receives the hydroponic liquid with the biogas slurry output by the hydroponic planting device and cultures algae by using the hydroponic liquid; after filtering, outputting the hydroponic liquid to the water production unit, and outputting the algae to the concentrated algae unit;
and (4): the water production unit can optionally execute the step (4-1) and/or the step (4-2); the concentrated algae unit can optionally perform step (4-3) and/or step (4-4);
step (4-1): the water production unit returns the hydroponic liquid to the biogas liquid feeding unit through a water production circulation output pipe;
step (4-2): the water producing unit discharges the hydroponic liquid out of the circulating system through the water outlet pipe;
step (4-3): the concentrated algae unit reflows the algae to the algae reaction device through the algae circulating output pipe;
step (4-4): the concentrated algae unit discharges algae out of the recyclable system through the algae output pipe.
Preferably, the method further comprises the following steps: the step (4) is selected according to the step (5);
the step (5) comprises at least one of the following steps:
step (5-1): detecting the flow rate of biogas slurry feeding in the biogas slurry feeding unit;
step (5-2): controlling the feeding flow of the biogas slurry feeding unit according to the clear liquid flow discharged by the water outlet output pipe and the algae outlet flow of the algae outlet pipe;
step (5-3): controlling the clear liquid reflux flow of the water production unit according to the feeding flow of the biogas slurry feeding unit;
step (5-4): and controlling the algae liquid reflux flow of the concentrated algae unit according to the feeding flow of the biogas slurry feeding unit.
Preferably, the method further comprises the step (5); the step (5) is specifically as follows:
when the algae outflow quantity discharged by the concentrated algae unit is higher than the preset range, the biogas slurry feeding unit reduces the output flow of biogas slurry in the algae water culture processing unit, and the concentrated algae unit reduces the backflow quantity of the concentrated algae liquid;
when the algae outlet flow rate discharged by the concentrated algae unit is lower than a preset range, the biogas slurry feeding unit increases the output flow rate of biogas slurry in the algae water culture processing unit, and the concentrated algae unit increases the reflux amount of the concentrated algae solution;
when the flow of the biogas inlet liquid or organic matters and trace elements contained in the biogas liquid change, the water production unit generates qualified clear liquid according to the real-time change of the system for backflow, the qualified clear liquid is mixed in the biogas liquid feeding unit, and the feeding concentration of the biogas liquid output to the algae water culture processing unit is adjusted;
when more hydroponic plants and algae are required to react with organic matters and related microelements in the biogas slurry, a linkage command is sent to an algae outlet flowmeter and an algae liquid backflow valve of the concentrated algae unit, the opening degree of the algae liquid backflow valve is increased according to a preset proportion, and the backflow amount of the concentrated algae liquid is increased.
The invention has the beneficial effects that:
the recyclable system can efficiently treat biogas slurry generated by anaerobic fermentation, effectively utilize most of carbon sources and nitrogen sources in the biogas slurry, has high unit material purification rate, has high automatic restoration and regulation capability on plants and can realize recycling ecological operation; meanwhile, the circulating system is stable in operation, hydroponic plants, liquid phase and algae substances can be smoothly separated, and the harm of the biogas slurry to the environment is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a biogas slurry purification ecological recyclable system.
Wherein:
the device comprises a biogas slurry feeding unit 1, an algae water culture treatment unit 2, a water production unit 3 and a concentrated algae unit 4; an air intake unit 5;
the system comprises biogas slurry 10, a biogas slurry water inlet pump 11, a water inlet flow meter 12, a pipeline mixer 13 and a water inlet control valve 14;
a water planting device 21, an algae reaction device 22, a water planting liquid outlet valve 23 and an algae water feeding valve 24; hydroponic plant 211; an algae growth reaction device 221, an algae collection and filtration device 222;
a produced water circulation output pipe 31 and a water outlet output pipe 32; a clear liquid water pump 33, a clear liquid outlet flow meter 34, a clear liquid outlet valve 35, a clear liquid reflux valve 36 and a clear liquid outlet valve 37;
an algae circulation output pipe 41, an algae output pipe 42, an algae output water pump 43, an algae output flowmeter 44, a concentrated algae liquid outlet valve 45, an algae liquid reflux valve 46 and an algae output valve 47; an air compressor 51 and a dissolved air tank 52.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1, a biogas slurry purification ecological recyclable system comprises: the device comprises a biogas slurry feeding unit 1, an algae water culture treatment unit 2, a water production unit 3 and a concentrated algae unit 4;
the output end of the biogas slurry feeding unit 1 is connected with the input end of the algae water culture processing unit 2; the output end of the algae water culture processing unit 2 is respectively connected with the input end of the water production unit 3 and the input end of the concentrated algae unit 4; the water production unit 3 is provided with a water production circulation output pipe 31 and a water outlet output pipe 32, and the water production circulation output pipe 31 is connected to the biogas slurry feeding unit 1; the concentrated algae unit 4 is provided with an algae circulating output pipe 41 and an algae output pipe 42; the algae circulation output pipe 41 is connected to the input end of the algae water culture processing unit 2;
the biogas slurry feeding unit 1 is used for outputting biogas slurry 10 to the algae water culture treatment unit 2;
the algae water culture processing unit 2 comprises the following components in sequence along the output direction of biogas slurry: a hydroponic planting device 21 and an algae reaction device 22;
the hydroponic planting device 21 is provided with hydroponic plants 211; the hydroponic planting device 21 is used for receiving the biogas slurry output by the biogas slurry feeding unit 1 and providing biogas slurry for the hydroponic liquid at the hydroponic plant 211;
the output end of the algae reaction device 22 is connected with the input end of the water production unit 3 and the input end of the concentrated algae unit 4; the algae reaction device 22 is used for receiving the hydroponic liquid with the biogas slurry output by the hydroponic planting device 21 and culturing algae by using the hydroponic liquid; after filtering, outputting the hydroponic liquid to the water production unit 3, and outputting the algae to the concentrated algae unit 4;
the water production circulation output pipe 31 is used for outputting the hydroponic liquid of the algae reaction device 22 to the biogas liquid feeding unit 1; the water outlet pipe 32 is used for discharging the water culture solution of the algae reaction device 22;
the algae circulation output pipe 41 is used for outputting the algae of the algae reaction device 22 to the algae reaction device 22; the algae output pipe 42 is used for discharging the algae in the algae reaction device 22.
The recyclable system can efficiently treat biogas slurry generated by anaerobic fermentation, effectively utilize most of carbon sources and nitrogen sources in the biogas slurry, has high unit material purification rate, has high automatic restoration and regulation capability on plants and can realize recycling ecological operation; meanwhile, the circulating system is stable in operation, the hydroponic plants 211, the liquid phase and the algae can be separated smoothly, and the harm of the biogas slurry to the environment is reduced.
The biogas slurry feeding unit 1 feeds biogas slurry into the algae water culture treatment unit 2, and the biogas slurry firstly enters the water culture planting device 21; the hydroponic plants 211 are planted on the hydroponic planting device 21, and the hydroponic plants 211 utilize organic matters and various trace elements in the biogas slurry through the biological utilization effect of the hydroponic plants 211 in the device, so that the related pollution degree of the biogas slurry water body is reduced; after reacting for a period of time, outputting the hydroponic liquid with the biogas slurry in the hydroponic planting device 21 to the algae reaction device 22 (the output mode can be a known drainage, pouring and the like mode, and the hydroponic liquid outlet valve 23 can be preferably opened); algae is contained in the algae reaction device 22, or the water culture solution with biogas slurry contains a certain amount of algae; the algae stays in the algae reaction device 22, and the residual organic matters and trace elements which are not utilized in the water culture solution of the biogas slurry are secondarily utilized; after the algae react for a period of time in the algae reaction device 22, the algae reaction device 22 outputs the qualified treated water to the water production unit 3;
the water production circulation output pipe 31 of the water production unit 3 is connected to the biogas slurry feeding unit 1, and can re-flow the hydroponic liquid back to the biogas slurry feeding unit 1 to form a clear liquid backflow channel, so that the relevant feeding concentration of the biogas slurry can be adjusted, the relevant elements of the inlet biogas slurry in the algae hydroponic treatment unit 2 can be controlled and adjusted, and the stability of the system is improved; after the water culture solution circularly flows back for many times through the water production circulating output pipe 31, the pollution degree of the water culture solution is reduced to meet the discharge standard, and the water culture solution can be discharged out of the circulating system through the water outlet output pipe 32.
The algae circulation output pipe 41 of the concentrated algae unit 4 is connected to the input end of the algae hydroponics processing unit 2, and can return the algae output by the algae reaction device 22 to the input end of the algae reaction device 22 again, and can perform the concentrated algae liquid backflow control according to the growth of the algae in the algae growth reaction device 221 (the backflow mode can be a known drainage mode, a pouring mode, and the like, and here, the algae liquid backflow valve 46 can be preferably opened), so that the concentrated algae liquid can enter the algae growth reaction device 221 through a pipeline, and the algae growth stock in the algae growth reaction device 221 is ensured; and the algae output pipe 42 of the concentrated algae unit 4 can discharge the algae to the outside.
Preferably, the method further comprises the following steps: an air intake unit 5;
the air intake unit 5 is installed at the algae circulation output pipe 41 for supplying oxygen or air.
The air inlet unit 5 is used for providing oxygen for the algae conveyed by the algae circulation output pipe 41 and adjusting the growth speed of the algae; when it is desired to reduce the growth rate of the algae, the concentration of oxygen output to the algae may be reduced to reduce the growth inventory of algae within the algae reaction apparatus 22; when the growth rate of the algae needs to be increased, the concentration of oxygen output to the algae can be increased to increase the growth inventory of algae within the algae reaction apparatus 22; the present embodiment can further control the growth stock of algae in the algae reaction device 22 by adjusting the oxygen environment during the algae backflow, and has the characteristics of stable operation and recycling.
Preferably, the biogas slurry feeding unit 1 comprises: a biogas slurry inlet pump 11, an inlet water flow meter 12 and a pipeline mixer 13.
The biogas slurry water intake pump 11 pumps biogas slurry to the algae water culture processing unit 2, and in the process of conveying the biogas slurry, the water intake flow meter 12 detects the flow rate of the biogas slurry in the pipeline in real time, so that other valve bodies of the subsequent circulating system are conveniently matched to regulate and control the water culture liquid and algae in the system, the water culture plants 211, water and algae substances can be smoothly separated, and the harm effect of the biogas slurry to the environment is reduced. The pipeline mixer 13 can uniformly mix newly transferred biogas slurry and circulated hydroponic liquid again.
Preferably, the algae reaction apparatus 22 sequentially comprises, in the output direction of the biogas slurry: an algae growth reaction device 221 and an algae collection and filtration device 222;
the input end of the algae growth reaction device 221 is connected to the output end of the hydroponic planting device 21, and the output end of the algae growth reaction device is connected to the input end of the algae collection and filtration device 222; the output end of the algae collecting and filtering device 222 is respectively connected with the water producing unit 3 and the concentrated algae unit 4;
the algae growth reaction device 221 is used for receiving the hydroponic liquid with biogas slurry output by the hydroponic planting device 21 and culturing algae by using the hydroponic liquid;
the algae collecting and filtering device 222 has a filtering function, and is configured to output the hydroponic liquid output by the algae growth reaction device 221 to the water production unit 3, and output the algae output by the algae growth reaction device 221 to the concentrated algae unit 4.
The present embodiment preferably divides the algae reaction apparatus 22 into the algae growth reaction apparatus 221 and the algae collection and filtration apparatus 222 to independently perform the steps of algae growth and filtration; the algae growth reaction device 221 and the algae collection and filtration device 222 are connected through a pipeline, and the algae growth reaction device 221 outputs the mixture of the algae and the hydroponic liquid to the algae collection and filtration device 222; the algae collecting and filtering device 222 is internally provided with membrane elements which are known membranes with filtering function, can realize the separation of algae and hydroponic liquid so as to circulate the algae and the hydroponic liquid in the system through the water producing unit 3 and the concentrated algae unit 4, and can preferably arrange the membrane elements in the center of the inner cavity of the algae collecting and filtering device 222.
Preferably, the water production unit 3 comprises: the water production circulation output pipe 31, the water outlet output pipe 32, the clear liquid water pump 33 and the clear liquid water outlet flow meter 34;
the water outlet pipe 32 connects the algae water culture processing unit 2, the clear water pump 33 and the clear water outlet flowmeter 34 in sequence; one end of the produced water circulation output pipe 31 is connected to a connecting pipeline between the clear liquid water pump 33 and the clear liquid outlet flow meter 34, and the other end is connected to the biogas slurry feeding unit 1.
The purified hydroponic liquid is provided with two branches:
one shunt circuit: the clear liquid water pump 33 is connected with the biogas slurry feeding unit 1 through the produced water circulating output pipe 31; and the other branch circuit: the clear liquid water pump 33 is connected to the clear liquid outlet flow meter 34 through the outlet water pipe 32. And the two branches can be provided with corresponding valve bodies, for example, a clear liquid outlet valve 35 is arranged on a connecting pipeline between the algae water culture processing unit 2 and the water production unit 3; the produced water circulation output pipe 31 is provided with a clear liquid reflux valve 36; and a clear liquid outlet valve 37 arranged between the clear liquid water pump 33 and the clear liquid outlet flow meter 34, wherein the clear liquid outlet valve 37 is used for controlling the flow output by the outlet water output pipe 32. This product water unit 3 enables whole system business turn over water can reach the stability of ecological operation and obtain guaranteeing.
Preferably, the concentrated algae unit 4 comprises: the algae circulating output pipe 41, the algae output pipe 42, the algae output water pump 43 and the algae output flowmeter 44;
the algae output pipe 42 sequentially connects the algae water culture processing unit 2, the algae output water pump 43 and the algae output flowmeter 44; one end of the algae circulation output pipe 41 is connected to a connecting pipeline between the algae output water pump 43 and the algae output flow meter 44, and the other end is connected to the input end of the algae water culture processing unit 2.
The algae is provided with two branches after the algae collecting and filtering device 222 forms concentrated algae liquid and is discharged:
the first branch is an algae outlet pipe 42 which directly discharges the concentrated algae liquid to the outside of the system through a concentrated algae liquid outlet valve 45, an algae outlet water pump 43 and an algae outlet flowmeter 44; the second branch is that the concentrated algae liquid enters the input end of the algae growth reaction device 221 through a concentrated algae liquid outlet valve 45, an algae outlet water pump 43, an algae liquid reflux valve 46 and an air inlet unit 5; the concentrated algae liquid reflux control is performed according to the growth vigor of the algae in the algae growth reaction device 221, and after the algae liquid reflux valve 46 is opened, the concentrated algae liquid preferentially flows back into the dissolved air tank 52 through the algae circulation output pipe 41 and enters the algae growth reaction device 221 after being in maximum contact with air, so that the algae growth storage in the algae growth reaction device 221 is ensured.
The air intake unit 5 includes: an air compressor 51 and a dissolved air tank 52;
the dissolved air tank 52 is installed on a connecting pipeline between the algae circulation output pipe 41 and the algae reaction device 22; the output end of the air compressor 51 is communicated with the dissolved air tank 52 and is used for outputting oxygen or air into the dissolved air tank 52.
More preferably, the biogas slurry feeding unit 1 is provided with a water inlet control valve 14;
a clear liquid outlet valve 35 is arranged on a connecting pipeline between the algae water culture processing unit 2 and the water producing unit 3; the water production circulation output pipe 31 is provided with a clear liquid reflux valve 36;
a concentrated algae liquid outlet valve 45 is arranged on a connecting pipeline between the algae hydroponics processing unit 2 and the concentrated algae unit 4; the algae circulation output pipe 41 is provided with an algae liquid reflux valve 46;
and a water culture solution outlet valve 23 is arranged on a connecting pipeline between the water culture planting device 21 and the algae reaction device 22.
The connecting pipeline between the algae growth reaction device 221 and the algae collection and filtration device 222 is provided with an algae water feeding valve 24; the water outlet output pipe 32 is provided with a clear liquid outlet valve 37; the algae output pipe 42 is provided with an algae output valve 47.
The water inlet control valve 14 is used for adjusting the output flow of the biogas slurry in the hydroponic planting device 21;
the clear liquid outlet valve 35 is used for adjusting the output flow of the water culture solution in the algae water culture processing unit 2 so as to adjust the flow of the water culture solution in the water outlet output pipe 32; the clear liquid reflux valve 36 is used for adjusting the flow rate of the water culture solution when the water culture solution is refluxed to the biogas slurry feeding unit 1;
the concentrated algae liquid outlet valve 45 is used for adjusting the output flow of the concentrated algae liquid in the algae water culture processing unit 2; the algae liquid reflux valve 46 is used for adjusting the reflux flow of the concentrated algae liquid in the algae circulation output pipe 41.
The hydroponic liquid outlet valve 23 is used for adjusting the transmission flow of the hydroponic liquid between the hydroponic planting device 21 and the algae reaction device 22;
this scheme accessible water control valve 14, clear liquid outlet valve 35, clear liquid return valve 36, concentrated algae liquid outlet valve 45 and the regulation of algae liquid return valve 46 can adjust the concentration of natural pond liquid, water planting liquid and algae in the circulated system, have further ensured the operation of circulated system stable, can smoothly separate water planting plant 211, water and algae material, have reduced the harm of natural pond liquid to the environment.
A method for controlling a circulating system for biogas slurry purification ecology comprises the following steps:
step (1): the biogas slurry feeding unit 1 outputs biogas slurry to the algae water culture processing unit 2;
step (2): the hydroponic planting device 21 receives the biogas slurry output by the biogas slurry feeding unit 1 and provides biogas slurry for the hydroponic liquid of the hydroponic plant 211; outputting the hydroponic liquid with the biogas slurry of the hydroponic planting device 21 to the algae reaction device 22;
and (3): the algae reaction device 22 receives the hydroponic liquid with the biogas slurry output by the hydroponic planting device 21 and cultures algae by using the hydroponic liquid; after filtering, outputting the hydroponic liquid to the water production unit 3, and outputting the algae to the concentrated algae unit 4;
and (4): the water production unit 3 can optionally execute the step (4-1) and/or the step (4-2); the concentrated algae unit 4 can optionally perform step (4-3) and/or step (4-4);
step (4-1): the water production unit 3 returns the hydroponic liquid to the biogas liquid feeding unit 1 through a water production circulation output pipe 31;
step (4-2): the water producing unit 3 discharges the hydroponic liquid out of the circulatable system through the water outlet pipe 32;
step (4-3): the concentrated algae unit 4 returns the algae to the algae reaction device 22 through the algae circulation output pipe 41;
step (4-4): the concentrated algae unit 4 discharges algae out of the recyclable system through an algae output pipe 42.
More preferably, the method further comprises the following steps: the step (4) is selected according to the step (5);
the step (5) comprises at least one of the following steps:
step (5-1): detecting the flow rate of biogas slurry feeding in the biogas slurry feeding unit 1;
step (5-2): controlling the feeding flow of the biogas slurry feeding unit 1 according to the clear liquid flow discharged by the water outlet pipe 32 and the algae outlet flow of the algae outlet pipe 42;
step (5-3): controlling the clear liquid reflux flow of the water production unit 3 according to the feeding flow of the biogas slurry feeding unit 1;
step (5-4): controlling the algae liquid reflux flow of the concentrated algae unit 4 according to the feeding flow of the biogas slurry feeding unit 1.
More preferably, the method further comprises the step (5); the step (5) is specifically as follows:
when the algae outflow quantity discharged by the concentrated algae unit 4 is higher than the preset range, the biogas slurry feeding unit 1 reduces the output flow of biogas slurry in the algae water culture processing unit 2, and the concentrated algae unit 4 reduces the backflow quantity of concentrated algae liquid;
when the algae output flow rate discharged by the concentrated algae unit 4 is lower than the preset range, the biogas slurry feeding unit 1 increases the output flow rate of biogas slurry in the algae water culture processing unit 2, and the concentrated algae unit 4 increases the reflux amount of the concentrated algae solution;
when the flow of the biogas inlet liquid or organic matters and trace elements contained in the biogas liquid change, the water production unit 3 generates qualified clear liquid according to the real-time change of the system for backflow, the qualified clear liquid is mixed in the biogas liquid feeding unit 1, and the feeding concentration of the biogas liquid output to the algae water culture processing unit 2 is adjusted;
when more hydroponics plants 211 and algae are needed to react with organic matters and related microelements in the biogas slurry, an interlocking command is sent to the algae outlet flow meter 44 and the algae liquid reflux valve 46 of the concentrated algae unit 4, the opening degree of the algae liquid reflux valve 46 is increased according to a preset proportion, and the reflux quantity of the concentrated algae liquid is increased.
When the algae outflow quantity discharged by the concentrated algae unit 4 is higher than the preset range, the biogas slurry feeding unit 1 reduces the feeding flow quantity of the algae water culture processing unit 2, and the concentrated algae unit 4 reduces the backflow quantity of the concentrated algae liquid; when the algae discharge flow rate discharged by the concentrated algae unit 4 is lower than a preset range, the biogas slurry feeding unit 1 increases the feeding flow rate of the algae water culture processing unit 2, the concentrated algae unit 4 increases the backflow rate of the concentrated algae liquid, when the algae discharge flow rate is suddenly increased, usually, the whole ecological system suddenly fluctuates, at the moment, the algae discharge flow rate has a high-flow alarm, and a chain command is sent to a biogas slurry inlet pump 11 and an inlet flow meter 12 of the biogas slurry feeding unit 1 to reduce the operating frequency of the biogas slurry inlet pump by a preset reduction amplitude and reduce the feeding flow rate; if the algae output amount is recovered to be normal within the set time through the adjustment, the normal operation is maintained, if the algae output amount is continuously increased, the operation of reducing the flow rate of the biogas inlet liquid is automatically executed, and the feeding can be stopped when necessary;
correspondingly, when the flow rate of the biogas inlet liquid changes, organic matters and related trace elements entering the system also change, and when the amount of the organic matters and related trace elements entering the system increases, more hydroponic plants 211 and algae organisms are required to react with the hydroponic plants and the algae organisms to be treated, a chain command is sent to the algae outlet flow meter 44 and the algae liquid reflux valve 46 of the concentrated algae unit 4, the opening degree of the algae liquid reflux valve 46 is increased according to a preset proportion, and the reflux amount of the concentrated algae liquid is increased; simultaneously through setting up natural pond liquid feeding unit 1 and producing water unit 3 and implement communication control, when the flow of intaking natural pond liquid or natural pond liquid contained organic matter and microelement change, produce water unit 3 and can produce qualified clear liquid according to the system and flow back, adjust natural pond liquid feeding unit 1's feeding nature, from this, purify ecological circulating system to natural pond liquid and in time adjust, the reaction is rapid.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. The utility model provides a natural pond liquid purifies ecological circulated system which characterized in that includes: the device comprises a biogas slurry feeding unit, an algae water culture treatment unit, a water production unit and a concentrated algae unit;
the output end of the biogas slurry feeding unit is connected with the input end of the algae water culture processing unit; the output end of the algae water culture processing unit is respectively connected with the input end of the water production unit and the input end of the concentrated algae unit; the water production unit is provided with a water production circulation output pipe and a water outlet output pipe, and the water production circulation output pipe is connected to the biogas slurry feeding unit; the concentrated algae unit is provided with an algae circulating output pipe and an algae output pipe; the algae circulating output pipe is connected to the input end of the algae water culture processing unit;
the biogas slurry feeding unit is used for outputting biogas slurry to the algae water culture treatment unit;
the algae water culture treatment unit sequentially comprises the following components in the output direction of biogas slurry: a water planting device and an algae reaction device;
the water planting device is provided with water planting plants; the water planting device is used for receiving the biogas slurry output by the biogas slurry feeding unit;
the output end of the algae reaction device is connected with the input end of the water production unit and the input end of the concentrated algae unit; the algae reaction device is used for receiving the hydroponic liquid with the biogas slurry output by the hydroponic planting device, culturing algae, has a filtering function, outputs the hydroponic liquid to the water production unit and outputs the algae to the concentrated algae unit;
the water production circulation output pipe is used for outputting the hydroponic liquid of the algae reaction device to the biogas liquid feeding unit; the water outlet pipe is used for discharging the water culture solution of the algae reaction device;
the algae circulation output pipe is used for outputting the algae of the algae reaction device to the algae reaction device; the algae output pipe is used for discharging the algae in the algae reaction device.
2. The ecological recycling system for biogas slurry purification according to claim 1, further comprising: an air intake unit;
the air inlet unit is arranged on the algae circulation output pipe and used for providing oxygen or air.
3. The ecological recycling system for biogas slurry purification according to claim 1, wherein the biogas slurry feeding unit comprises: a biogas slurry water inlet pump, a water inlet flow meter and a pipeline mixer.
4. The ecological recycling system for biogas slurry purification according to claim 1, wherein the algae reaction device comprises in sequence along the output direction of biogas slurry: the algae growth reaction device and the algae collection and filtration device;
the input end of the algae growth reaction device is connected with the output end of the water planting device, and the output end of the algae growth reaction device is connected with the input end of the algae collection and filtration device; the output end of the algae collecting and filtering device is respectively connected with the water producing unit and the concentrated algae unit;
the algae growth reaction device is used for receiving the hydroponic liquid with the biogas slurry output by the hydroponic planting device and culturing algae by using the hydroponic liquid;
the algae collecting and filtering device has a filtering function and is used for outputting the hydroponic liquid output by the algae growth reaction device to the water production unit and outputting the algae output by the algae growth reaction device to the concentrated algae unit.
5. The ecological recyclable system for biogas slurry purification according to claim 1, wherein the water producing unit comprises: the water production circulation output pipe, the water outlet output pipe, the clear liquid water pump and the clear liquid water outlet flow meter;
the water outlet pipe is used for sequentially connecting the algae water culture processing unit, the clear liquid water pump and the clear liquid water outlet flowmeter; one end of the produced water circulation output pipe is connected with a connecting pipeline between the clear liquid water pump and the clear liquid water outlet flow meter, and the other end of the produced water circulation output pipe is connected with the biogas slurry feeding unit.
6. The biogas slurry purification ecological recyclable system according to claim 1, wherein the concentrated algae unit comprises: the algae circulating output pipe, the algae output water pump and the algae output flowmeter;
the algae output pipe sequentially connects the algae water culture processing unit, the algae output water pump and the algae output flowmeter; one end of the algae circulating output pipe is connected with a connecting pipeline between the algae outlet water pump and the algae outlet flowmeter, and the other end of the algae circulating output pipe is connected with the input end of the algae water culture processing unit.
7. The ecological recyclable system for biogas slurry purification according to any one of claims 1-6, wherein the biogas slurry feeding unit is provided with a water inlet control valve;
a clear liquid outlet valve is arranged on a connecting pipeline between the algae water culture processing unit and the water production unit; the water production circulation output pipe is provided with a clear liquid reflux valve;
a connecting pipeline between the algae water culture processing unit and the concentrated algae unit is provided with a concentrated algae liquid outlet valve; the algae circulation output pipe is provided with an algae liquid reflux valve;
and a water culture solution outlet valve is arranged on a connecting pipeline between the water culture planting device and the algae reaction device.
8. A control method of a circulating system for biogas slurry purification ecology is characterized by comprising the following steps:
step (1): the biogas slurry feeding unit outputs biogas slurry to the algae water culture treatment unit;
step (2): the hydroponic planting device receives the biogas slurry output by the biogas slurry feeding unit and provides biogas slurry for hydroponic liquid of hydroponic plants; outputting the hydroponic liquid with the biogas slurry of the hydroponic planting device to an algae reaction device;
and (3): the algae reaction device receives the hydroponic liquid with the biogas slurry output by the hydroponic planting device and cultures algae by using the hydroponic liquid; after filtering, outputting the hydroponic liquid to the water production unit, and outputting the algae to the concentrated algae unit;
and (4): the water production unit can optionally execute the step (4-1) and/or the step (4-2); the concentrated algae unit can optionally perform step (4-3) and/or step (4-4);
step (4-1): the water production unit returns the hydroponic liquid to the biogas liquid feeding unit through a water production circulation output pipe;
step (4-2): the water producing unit discharges the hydroponic liquid out of the circulating system through the water outlet pipe;
step (4-3): the concentrated algae unit reflows the algae to the algae reaction device through the algae circulating output pipe;
step (4-4): the concentrated algae unit discharges algae out of the recyclable system through the algae output pipe.
9. The control method according to claim 8, characterized by further comprising: the step (4) is selected according to the step (5);
the step (5) comprises at least one of the following steps:
step (5-1): detecting the flow rate of biogas slurry feeding in the biogas slurry feeding unit;
step (5-2): controlling the feeding flow of the biogas slurry feeding unit according to the clear liquid flow discharged by the water outlet output pipe and the algae outlet flow of the algae outlet pipe;
step (5-3): controlling the clear liquid reflux flow of the water production unit according to the feeding flow of the biogas slurry feeding unit;
step (5-4): and controlling the algae liquid reflux flow of the concentrated algae unit according to the feeding flow of the biogas slurry feeding unit.
10. The control method according to claim 9, characterized by further comprising the step (5);
the step (5) is specifically as follows:
when the algae outflow quantity discharged by the concentrated algae unit is higher than the preset range, the biogas slurry feeding unit reduces the output flow of biogas slurry in the algae water culture processing unit, and the concentrated algae unit reduces the backflow quantity of the concentrated algae liquid;
when the algae outlet flow rate discharged by the concentrated algae unit is lower than a preset range, the biogas slurry feeding unit increases the output flow rate of biogas slurry in the algae water culture processing unit, and the concentrated algae unit increases the reflux amount of the concentrated algae solution;
when the flow of the biogas inlet liquid or organic matters and trace elements contained in the biogas liquid change, the water production unit generates qualified clear liquid according to the real-time change of the system for backflow, the qualified clear liquid is mixed in the biogas liquid feeding unit, and the feeding concentration of the biogas liquid output to the algae water culture processing unit is adjusted;
when more hydroponic plants and algae are required to react with organic matters and related microelements in the biogas slurry, a linkage command is sent to an algae outlet flowmeter and an algae liquid backflow valve of the concentrated algae unit, the opening degree of the algae liquid backflow valve is increased according to a preset proportion, and the backflow amount of the concentrated algae liquid is increased.
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