CN105859061A - Method for treating comprehensive wastewater in rare-earth industrial park by utilizing biochemical pool - Google Patents

Method for treating comprehensive wastewater in rare-earth industrial park by utilizing biochemical pool Download PDF

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CN105859061A
CN105859061A CN201610455522.XA CN201610455522A CN105859061A CN 105859061 A CN105859061 A CN 105859061A CN 201610455522 A CN201610455522 A CN 201610455522A CN 105859061 A CN105859061 A CN 105859061A
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comprehensive wastewater
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industry garden
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王超
雷弢
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Sichuan Geruisi Environment Technology Co Ltd
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Sichuan Geruisi Environment Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • C02F1/32Treatment of water, waste water, or sewage by irradiation with ultra-violet light
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/38Treatment of water, waste water, or sewage by centrifugal separation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/105Phosphorus compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/04Flow arrangements
    • C02F2301/046Recirculation with an external loop
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/04Disinfection
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/308Biological phosphorus removal

Abstract

The invention provides a method for treating comprehensive wastewater in a rare-earth industrial park by utilizing a biochemical pool. The method comprises the following steps: pretreatment, namely sequentially enabling comprehensive wastewater in a rare-earth industrial park to pass through a coarse screen, a fine screen, a rotational flow sedimentation tank and a multi-stage chemical sedimentation tank; primary treatment, namely sequentially enabling the comprehensive wastewater treated in the step (1) to pass through an anaerobic zone, a regulation zone 1, an anoxic zone, a regulation zone II and an aerobic zone to carry out denitrification, dephosphorization and organic matter removing treatment, and passing through a secondary sedimentation tank to separate slurry and water; and secondary treatment, namely enabling the comprehensive wastewater in the rare-earth industrial park after primary treatment to flow through a continuous sand-filter, and performing ultraviolet disinfection. The sewage treatment method is simple and low in cost, is used for treating the comprehensive wastewater by combining pretreatment and continuous sand-filter process, and has a good treatment effect; and the pollution parameter of the treated wastewater can reach the standard. The method is environment-friendly, does not have pollution, and has a wide market application value.

Description

A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater
Technical field
The present invention relates to sewage treatment area, be specifically related to a kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater.
Background technology
Environmental Protection Department has carried out national major pollutants overall control work since Eleventh Five-Year Plan; sewage treatment facility has become the Main Means controlling the point source form of export such as life source and industrial source, is the important means of the environmental problem that reply rapid economic development brings with Rapid-Urbanization.Industrial production wastewater is to reduce pollutant emission, the important foundation of control area environmental improvement with effectively collecting with process of town domestic sewage.Along with the quickening of China's Development of China's Urbanization, the road of fast development has also been gone in the construction of sewage treatment facility.According to incompletely statistics, 2013, all kinds of sewage treatment facilities put into operation in the whole nation are (containing urban wastewater treatment firm, centralized Industrial Waste Water Treatments facility and scattering sewage treatment facility) at totally 6 124, day processes the water yield 1.26 hundred million m, it is achieved cut down COD22.76 ten thousand t of life source emission, ammonia nitrogen 3.27 ten thousand t.The quantity of sewage treatment facility, ability and handling rate have increased significantly compared with 2000.Wherein, sewage treatment facility quantity adds more than 3 700 places, and average annual amplification is up to 19%;Disposal ability adds 7.46 times, and waste water collection rate increases by 4.4% every year.Owing to China is vast in territory, the regional significant difference of the level of economic development, in addition many problems such as the level of economic development, planning and designing ability, the problems such as regional development is uneven, sewage collecting pipe-line construction is delayed, to build up facility operation efficiency on the low side that cause existing sewage disposal system to occur in that after have passed through evolution at a high speed.
Patent publication No. CN105621613A discloses a kind of A2/ O denitrification dephosphorization technique, this invention A2In/O technique, aerobic section backflow enters low speed centrifuge, is centrifuged separating, and precipitating sludge is back to anaerobism section, and supernatant is back to anoxia section.Technique only increases low speed centrifuge, preferably by denitrogenation and two process areas of dephosphorization, does not interfere with each other, and overcomes tradition A2/ O method technique because of denitrification effect by return current ratio of the mixed liquid size and phosphor-removing effect by returned sludge being carried DO and nitric acid state oxygen is affected secretly, and the shortcoming that the denitrogenation dephosphorizing that causes is inefficient.
Patent publication No. CN105601056A discloses the sewage water treatment method of a kind of intensified denitrification and dephosphorization function, specifically includes following steps: S1: the sewage after being processed by anaerobic pond imports solid-liquid separation tank;S2: the mud mixture produced by described solid-liquid separation tank imports anoxic pond, a supernatant part for generation imports dephosphorization pond, and a part imports nitrification tank;S3: the mixed liquor after being processed in described dephosphorization pond imports sedimentation tank, the mud that described sedimentation tank produces discharges, and the supernatant of generation imports described nitrification tank;S4: the nitrification liquid after being processed by described nitrification tank imports described anoxic pond successively, Aerobic Pond processes.Described dephosphorization pond and described nitrification tank are individually separated by this invention, have both achieved the function of dephosphorization and denitrogenation, make again to be independent of each other between dephosphorization and denitrogenation, maintain the stability of sewage disposal system.
Existing A2O biochemistry pool processes in the technology of sewage, and the technology with denitrogenation dephosphorizing function is more universal, but these technology are applied to the process of rare-earth industry garden comprehensive wastewater, and treatment effect is poor.Therefore; invent a kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater; biochemistry pool is combined with other sewage disposal technologies and is jointly processed by rare-earth industry garden comprehensive wastewater, to promoting that sewage disposal development and water conservation recycling are significant.
Summary of the invention
In order to solve prior art problem, the present invention provides a kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater.Sewage water treatment method of the present invention is simple, low cost, is combining pretreatment and active sand filter tank technique process rare-earth industry garden comprehensive wastewater, and treatment effect is good, and after process, every contamination index is the most up to standard, environment friendly and pollution-free, has wide market using value.
For solve solve prior art problem, the present invention by the following technical solutions:
. a kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater, it is characterised in that include following process step:
(1) pretreatment: rare-earth industry garden comprehensive wastewater is passed sequentially through coarse rack, fine fack, rotational flow settling pond and multi-grade chemical sedimentation tank;
(2) coagulation: the rare-earth industry garden comprehensive wastewater after step (1) being processed passes sequentially through the anaerobic zone of biochemistry pool, regulatory region 1, anoxic zone, regulatory region 2 and aerobic zone, and 0.5-0.7h is stopped in anaerobic zone, regulatory region 1 stops 0.5-0.7h, anoxic zone stops 3-4h, regulatory region 2 stops 0.5-0.7h, and aerobic zone stops 5-6h, carries out denitrogenation, dephosphorization and removes Organic substance process, again by second pond, carry out mud-water separation;The coefficient of producing sewage sludge of described biochemistry pool is 0.80-0.85kgDS/kgBOD5, mud age is 15 days, and gas-water ratio is 20:1, wherein, anaerobic zone sludge concentration 3.8-4.0g/L, regulatory region 1 sludge concentration 4.0-4.2 g/L, anoxic zone sludge concentration 3.8-4.0g/L, regulatory region 2 sludge concentration 3.9-4.0g/L, aerobic zone sludge concentration 3.8-4.0g/L;
(3) two stage treatment: the rare-earth industry garden comprehensive wastewater after then step (2) being processed is by active sand filter tank, then carries out ultraviolet disinfection.
Further, the grizzly bar gap of described coarse rack is 15-20mm, removes bigger floating thing in sewage;The grizzly bar gap of fine fack is 3-5mm, removes less floating thing in sewage;Rotational flow settling pond is the rotational flow settling pond of 270 ° of convolutions, removes float in sewage;Multi-grade chemical sedimentation tank is adjusted district by acid regulatory region, one-level pH regulation area, one-level coagulation tube settling district, two grades of pH regulation area, two-stage coagulation tube settling district, three grades of pH regulation area, three grades of coagulation tube settling districts and pH and forms, and removes colloid and heavy metal in sewage.
Further, described aerobic zone pH value is 6.5-8.5, is provided with porous tubular aeration tube bottom aerobic zone;
Further, when pH≤6, aerobic zone, add sodium bicarbonate regulation pH to 6.5-8.5;When pH >=9.5, aerobic zone, add dilute hydrochloric acid regulation pH to 6.5-8.5.
Further, described second pond surface loading is 1.0-1.2m3/(m2·h)。
Further, carrying out mud-water separation in described step (2), separate rear part fractional precipitation sludge reflux is to regulatory region 1.
Further, the rare-earth industry garden comprehensive wastewater after described step (2) processes is from bottom to top by active sand filter tank.
The biochemistry pool that utilizes of the present invention processes process chart such as Fig. 1 of rare-earth industry garden comprehensive wastewater.
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater of the present invention, compared with prior art, has and highlights substantive features and significant advantage as follows:
1. the present invention adds regulatory region 1 between the anaerobic zone and anoxic zone of biochemistry pool, eliminates the nitrate nitrogen in sludge reflux for sludge reflux and anaerobic pond is released the adverse effect of phosphorus, adds regulatory region 2, strengthen denitrification effect between anoxic zone and aerobic zone;
2. the present invention utilizes the method that biochemistry pool processes rare-earth industry garden comprehensive wastewater, is combining pretreatment and active sand filter tank technique process rare-earth industry garden comprehensive wastewater, and treatment effect is good, and after process, every contamination index is the most up to standard;
3. the sewage water treatment method of the present invention is simple, and low cost is environment friendly and pollution-free, has wide market using value.
Accompanying drawing explanation
Fig. 1 is that the biochemistry pool that utilizes of the present invention processes the technological process of rare-earth industry garden comprehensive wastewater.
Detailed description of the invention
Below by way of detailed description of the invention and accompanying drawing, the present invention is described in further detail, but this should not being interpreted as, the scope of the present invention is only limitted to Examples below.In the case of without departing from said method thought of the present invention, the various replacements made according to ordinary skill knowledge and customary means or change, should be included in the scope of the present invention.
Embodiment 1
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater:
(1) pretreatment: rare-earth industry garden comprehensive wastewater passes sequentially through coarse rack, fine fack, rotational flow settling pond and multi-grade chemical sedimentation tank, removes floating thing, float, colloid and heavy metal in sewage;
(2) coagulation: the rare-earth industry garden comprehensive wastewater after step (1) being processed passes sequentially through the anaerobic zone of biochemistry pool, regulatory region 1, anoxic zone, regulatory region 2 and aerobic zone, and at anaerobic zone time of staying 0.5h, regulatory region 1 time of staying 0.5h, anoxic zone time of staying 3h, regulatory region 2 time of staying 0.5h, aerobic zone time of staying 5h, carry out denitrogenation, dephosphorization and remove Organic substance process, pass through second pond again, carry out mud-water separation, precipitating sludge is partly refluxed to regulatory region 1, excess sludge discharge, and separates water and introduce two stage treatment;
(3) two stage treatment: the rare-earth industry garden comprehensive wastewater after then step (2) being processed is by active sand filter tank, then carries out ultraviolet disinfection.
The grizzly bar gap of described coarse rack is 15mm, and the grizzly bar gap of fine fack is 3mm, and the coefficient of producing sewage sludge of biochemistry pool is 0.80kgDS/kgBOD5, mud age is 15 days, and gas-water ratio is 20:1, and wherein, anaerobic zone sludge concentration 3.80g/L, regulatory region 1 sludge concentration 4.0 g/L, anoxic zone sludge concentration 3.8g/L, regulatory region 2 sludge concentration 3.9g/L, aerobic zone sludge concentration 3.8g/L, second pond surface loading is 1.0m3/(m2·h)。
Embodiment 2
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater:
(1) pretreatment: rare-earth industry garden comprehensive wastewater passes sequentially through coarse rack, fine fack, rotational flow settling pond and multi-grade chemical sedimentation tank, removes floating thing, float, colloid and heavy metal in sewage;
(2) coagulation: the rare-earth industry garden comprehensive wastewater after step (1) being processed passes sequentially through the anaerobic zone of biochemistry pool, regulatory region 1, anoxic zone, regulatory region 2 and aerobic zone, anaerobic zone time of staying 0.7h, regulatory region 1 time of staying 0.7h, anoxic zone time of staying 4h, regulatory region 2 time of staying 0.7h, aerobic zone time of staying 6h, carry out denitrogenation, dephosphorization and remove Organic substance process, pass through second pond again, carry out mud-water separation, precipitating sludge is partly refluxed to regulatory region 1, excess sludge discharge, and separates water and introduce two stage treatment;
(3) two stage treatment: the rare-earth industry garden comprehensive wastewater after then step (2) being processed is by active sand filter tank, then carries out ultraviolet disinfection.
The grizzly bar gap of described coarse rack is 20mm, and the grizzly bar gap of fine fack is 5mm, and the coefficient of producing sewage sludge of biochemistry pool is 0.85kgDS/kgBOD5, mud age is 15 days, and gas-water ratio is 20:1, wherein, anaerobic zone sludge concentration 4.0g/L, regulatory region 1 sludge concentration 4.2 g/L, anoxic zone sludge concentration 4.0g/L, regulatory region 2 sludge concentration 4.0g/L, aerobic zone sludge concentration 4.0g/L, second pond surface loading is 1.0-1.2m3/(m2·h)。
Embodiment 3
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater:
(1) pretreatment: rare-earth industry garden comprehensive wastewater passes sequentially through coarse rack, fine fack, rotational flow settling pond and multi-grade chemical sedimentation tank, removes floating thing, float, colloid and heavy metal in sewage;
(2) coagulation: the rare-earth industry garden comprehensive wastewater after step (1) being processed passes sequentially through the anaerobic zone of biochemistry pool, regulatory region 1, anoxic zone, regulatory region 2 and aerobic zone, anaerobic zone time of staying 0.6h, regulatory region 1 time of staying 0.6h, anoxic zone time of staying 3.6h, regulatory region 2 time of staying 0.5h, aerobic zone time of staying 6h, carry out denitrogenation, dephosphorization and remove Organic substance process, pass through second pond again, carry out mud-water separation, precipitating sludge is partly refluxed to regulatory region 1, excess sludge discharge, and separates water and introduce two stage treatment;
(3) two stage treatment: the rare-earth industry garden comprehensive wastewater after then step (2) being processed is by active sand filter tank, then carries out ultraviolet disinfection.
The grizzly bar gap of described coarse rack is 18mm, and the grizzly bar gap of fine fack is 4mm, biochemistry pool sludge concentration 4g/L, and coefficient of producing sewage sludge is 0.82kgDS/kgBOD5, mud age is 15 days, and gas-water ratio is 20:1, and second pond surface loading is 1.1m3/(m2·h)。
Embodiment 4
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater:
(1) pretreatment: rare-earth industry garden comprehensive wastewater passes sequentially through coarse rack, fine fack, rotational flow settling pond and multi-grade chemical sedimentation tank, removes floating thing, float, colloid and heavy metal in sewage;
(2) coagulation: the rare-earth industry garden comprehensive wastewater after step (1) being processed passes sequentially through the anaerobic zone of biochemistry pool, regulatory region 1, anoxic zone, regulatory region 2 and aerobic zone, anaerobic zone time of staying 0.5h, regulatory region 1 time of staying 0.7h, anoxic zone time of staying 4h, regulatory region 2 time of staying 0.5h, aerobic zone time of staying 6h, carry out denitrogenation, dephosphorization and remove Organic substance process, pass through second pond again, carry out mud-water separation, precipitating sludge is partly refluxed to regulatory region 1, excess sludge discharge, and separates water and introduce two stage treatment;
(3) two stage treatment: the rare-earth industry garden comprehensive wastewater after then step (2) being processed is by active sand filter tank, then carries out ultraviolet disinfection.
The grizzly bar gap of described coarse rack is 16mm, and the grizzly bar gap of fine fack is 3mm, biochemistry pool sludge concentration 4.1g/L, and coefficient of producing sewage sludge is 0.83kgDS/kgBOD5, mud age is 15 days, and gas-water ratio is 20:1, and second pond surface loading is 1.0-1.2m3/(m2·h)。
Embodiment 5
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater:
(1) pretreatment: rare-earth industry garden comprehensive wastewater passes sequentially through coarse rack, fine fack, rotational flow settling pond and multi-grade chemical sedimentation tank, removes floating thing, float, colloid and heavy metal in sewage;
(2) coagulation: the rare-earth industry garden comprehensive wastewater after step (1) being processed passes sequentially through the anaerobic zone of biochemistry pool, regulatory region 1, anoxic zone, regulatory region 2 and aerobic zone, anaerobic zone time of staying 0.6h, regulatory region 1 time of staying 0.5h, anoxic zone time of staying 3h, regulatory region 2 time of staying 0.7h, aerobic zone time of staying 5.5h, carry out denitrogenation, dephosphorization and remove Organic substance process, pass through second pond again, carry out mud-water separation, precipitating sludge is partly refluxed to regulatory region 1, excess sludge discharge, and separates water and introduce two stage treatment;
(3) two stage treatment: the rare-earth industry garden comprehensive wastewater after then step (2) being processed is by active sand filter tank, then carries out ultraviolet disinfection.
The grizzly bar gap of described coarse rack is 20mm, and the grizzly bar gap of fine fack is 5mm, biochemistry pool sludge concentration 4g/L, and coefficient of producing sewage sludge is 0.83kgDS/kgBOD5, mud age is 15 days, and gas-water ratio is 20:1, and second pond surface loading is 1.0m3/(m2·h)。

Claims (7)

1. one kind utilizes the method that biochemistry pool processes rare-earth industry garden comprehensive wastewater, it is characterised in that include following process step:
(1) pretreatment: rare-earth industry garden comprehensive wastewater is passed sequentially through grizzly bar gap be 15-20mm coarse rack, grizzly bar gap be 3-5mm fine fack, rotational flow settling pond, multi-grade chemical sedimentation tank;
(2) coagulation: the rare-earth industry garden comprehensive wastewater after step (1) being processed passes sequentially through the anaerobic zone of biochemistry pool, regulatory region 1, anoxic zone, regulatory region 2 and aerobic zone, and 0.5-0.7h is stopped in anaerobic zone, regulatory region 1 stops 0.5-0.7h, anoxic zone stops 3-4h, regulatory region 2 stops 0.5-0.7h, and aerobic zone stops 5-6h, carries out denitrogenation, dephosphorization and removes Organic substance process, again by second pond, carry out mud-water separation;The coefficient of producing sewage sludge of described biochemistry pool is 0.80-0.85kgDS/kgBOD5, mud age is 15 days, and gas-water ratio is 20:1, wherein, anaerobic zone sludge concentration 3.8-4.0g/L, regulatory region 1 sludge concentration 4.0-4.2 g/L, anoxic zone sludge concentration 3.8-4.0g/L, regulatory region 2 sludge concentration 3.9-4.0g/L, aerobic zone sludge concentration 3.8-4.0g/L;
(3) two stage treatment: the rare-earth industry garden comprehensive wastewater after then step (2) being processed is by active sand filter tank, then carries out ultraviolet disinfection.
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater the most according to claim 1, it is characterized in that: described rotational flow settling pond is the rotational flow settling ponds of 270 ° of convolutions, multi-grade chemical sedimentation tank is adjusted district by acid regulatory region, one-level pH regulation area, one-level coagulation tube settling district, two grades of pH regulation area, two-stage coagulation tube settling district, three grades of pH regulation area, three grades of coagulation tube settling districts and pH and forms.
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater the most according to claim 1, it is characterised in that: described aerobic zone pH value is 6.5-8.5, is provided with porous tubular aeration tube bottom aerobic zone.
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater the most according to claim 3, it is characterised in that: when pH≤6, aerobic zone, add sodium bicarbonate regulation pH to 6.5-8.5;When pH >=9.5, aerobic zone, add dilute hydrochloric acid regulation pH to 6.5-8.5.
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater the most according to claim 1, it is characterised in that: described second pond surface loading is 1.0-1.2m3/(m2·h)。
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater the most according to claim 1, it is characterised in that: carrying out mud-water separation in described step (2), separate rear part fractional precipitation sludge reflux is to regulatory region 1.
A kind of method utilizing biochemistry pool to process rare-earth industry garden comprehensive wastewater the most according to claim 1, it is characterised in that: the rare-earth industry garden comprehensive wastewater after described step (2) processes passes through active sand filter tank from bottom to top.
CN201610455522.XA 2016-06-22 2016-06-22 Method for treating comprehensive wastewater in rare-earth industrial park by utilizing biochemical pool Pending CN105859061A (en)

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Publication number Priority date Publication date Assignee Title
CN106186570A (en) * 2016-08-29 2016-12-07 合肥合意环保科技工程有限公司 One way of life sewage treatment process and equipment
CN106746199A (en) * 2016-12-06 2017-05-31 广东技术师范学院 A kind of sewage water treatment method
RU187325U1 (en) * 2018-06-19 2019-03-01 Общество с ограниченной ответственностью "ИНФРАЭКОПРОЕКТ" SEWAGE TREATMENT DEVICE

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Application publication date: 20160817