CN107188315B - Economic and efficient maintenance method for iron-manganese-ammonia biological purification filter - Google Patents

Economic and efficient maintenance method for iron-manganese-ammonia biological purification filter Download PDF

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CN107188315B
CN107188315B CN201710554790.1A CN201710554790A CN107188315B CN 107188315 B CN107188315 B CN 107188315B CN 201710554790 A CN201710554790 A CN 201710554790A CN 107188315 B CN107188315 B CN 107188315B
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filter
manganese
layer
tank
maintenance
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CN107188315A (en
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李冬
曹瑞华
郭跃洲
吕赛赛
张泽文
成朔
王艳菊
张�杰
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Beijing University of Technology
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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
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • 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
    • C02F3/02—Aerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/203—Iron or iron compound
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/206—Manganese or manganese compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06—Contaminated groundwater or leachate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

An economical and efficient maintenance method of a ferro-manganese ammonia biological purification filter belongs to the field of feed water purification and aims to ensure that the biological filter efficiently removes iron, manganese and ammonia nitrogen for a long time. The invention specifically comprises the following steps: excavating filter materials in the filter tank in a segmented mode, discarding filter materials with the height of 0-1/3 from top to bottom of a filter layer, and keeping 50% of the filter materials with the height of 1/3-2/3 and the height of 2/3-3/3 of the filter layer from top to bottom; mixing the retained filter material with a new filter material which is the same in volume and is made of the same material, loading the mixture into a filter layer from top to bottom at 1/3-3/3 height sections, and loading anthracite filter material into the filter layer from top to bottom at 0-1/3 height sections according to a reverse-granularity mode; after the filling is finished, the strength is 8-10L/(m)2S) backwashing, and introducing underground water to be treated to soak the filter material for 48 hours after 5min of backwashing; then, water is introduced for running culture until the filtered water TFe is continuously 5d under the conditions of the running parameters of the filter such as the designed filter speed, the backwashing strength, the backwashing duration and the like<0.3mg/L，Mn2+<0.1mg/L，NH4 +‑N<0.5mg/L。

Description

Economic and efficient maintenance method for iron-manganese-ammonia biological purification filter
The technical field is as follows:
the invention belongs to the field of feed water purification, and particularly relates to an economical and efficient maintenance method of a ferro-manganese ammonia biological purification filter.
Background art:
after the biological iron and manganese removal filter tank operates for a period of time, a layer of Fe is coated on the surface of the filter material3+And Mn4+Oxide, resulting in increased particle size of the filter materialThe thickness of the filter layer expands, and the porosity of the filter layer is increased; when the expansion rate of the filter material reaches 15-20%, sand is easy to run during back washing, and a large amount of organisms are lost. Based on the reasons, the iron, manganese and ammonia nitrogen of the effluent exceed the standard, and the TFe of the effluent is more than 0.3mg/L or Mn2+> 0.1mg/L or NH4 +-N > 0.5 mg/L. The excessive ferro-manganese and ammonia nitrogen can not meet the requirement of industrial production water, and the harm to human health is great, so the filter material in the filter tank is maintained after being used for a period of time, the traditional maintenance mode is to directly empty the filter material in the filter tank, and then to fill a new filter material into the filter tank, thus not only causing the waste and the waste of the filter material, but also being unfavorable for the quick start of the filter tank, and further leading the water yield and the water quality of the outlet water of the filter tank to be unable to meet the requirement for a long time, therefore, a simple, quick, economic and effective maintenance method of the biological filter tank for removing iron and manganese is found, and is particularly necessary for ensuring the.
When the filter tank is not thoroughly backwashed for a long time, the filter layer is easily seriously hardened, the hardened filter layer can cause 'short flow', a large proportion of ferro-manganese and ammonia nitrogen in the raw water is not fully oxidized and removed, and then the ferro-manganese and ammonia nitrogen penetrate through the filter layer, so that the different degrees of the discharged ferro-manganese and ammonia nitrogen exceed the standard, which is shown in that TFe is more than 0.3mg/L or Mn2+> 0.1mg/L or NH4 +-N > 0.5 mg/L. The conventional treatment method is to excavate the deironing belt of the filter layer and then replace the filter material with new one. The treatment method can solve the problem of hardening of the filter layer of the deironing zone, but cannot solve the problem of hardening of the filter layer of the demanganizing zone. Because organisms can secrete polysaccharide viscous metabolites, filter materials of the manganese removal belt can be hardened under the action of the viscous substances, and then phenomena of manganese leakage, abnormal filtering speed, reduction of water yield and the like can occur, so that maintenance methods for replacing all filter materials are generally adopted by a filter tank with hardened filter materials in many iron-manganese-ammonia biological purification water plants, and adverse effects of manganese leakage, abnormal filtering speed, reduction of water yield and the like caused by hardening of the filter materials of the manganese removal belt are thoroughly eliminated. The maintenance method for replacing all filter materials and filling new filter materials is not beneficial to restarting the filter, so that the filter cannot be qualified after long-time water outlet, and a large amount of filter materials which are not hardened in the middle lower part of the filter layer are wasted.Therefore, the method for maintaining the iron-manganese-ammonia biological purification filter tank is simple, rapid, economical and effective, and has obvious significance for realizing long-term high-efficiency stable operation of the filter tank.
The invention content is as follows:
the invention aims to provide an economic maintenance method for long-term high-efficiency stable operation of the iron-manganese ammonia biological purification filter.
The technical scheme of the invention is realized as follows:
the biological iron and manganese removing filter is a downward flow common rapid filter. The filter is internally provided with a manganese sand or quartz sand or anthracite filter material filtering layer with the thickness of 130-160 cm and the grain size gradation of 0.8-1.2 mm from top to bottom in sequence, or a double-layer filter material filtering layer consisting of an anthracite filter material with the thickness of 30-50 cm and the grain size gradation of 1.0-1.5 mm and a manganese sand filter material with the thickness of 80-130 cm and the grain size gradation of 0.8-1.2 mm; a cobblestone supporting layer with the thickness of 30-40 cm; a backwash water distribution system. The underground water compositely polluted by the iron, manganese and ammonia after aeration overflows into the filter tank from a water inlet tank above the filter tank, and then flows out from the bottom of the filter tank after being filtered;
the method realizes the maintenance and long-term high-efficiency stable operation of the ferro-manganese ammonia biological purification filter tank by selectively screening and retaining mature filter materials with a filter layer of which the height is 1/3-2/3 from top to bottom and 50% of mature filter materials with a height of 2/3-3/3 from top to bottom, constructing a double-layer filter material filter tank, and regulating and controlling the backwashing strength, the backwashing duration, the filtering speed and the working period of the filter tank.
The economic and efficient maintenance method of the iron-manganese-ammonia biological purification filter is characterized by comprising the following steps:
the biological iron and manganese removing filter is a downward flow common rapid filter. The filter is internally provided with a manganese sand or quartz sand or anthracite filter material filtering layer with the thickness of 130-160 cm and the grain size gradation of 0.8-1.2 mm from top to bottom in sequence, or a double-layer filter material filtering layer consisting of an anthracite filter material with the thickness of 30-50 cm and the grain size gradation of 1.0-1.5 mm and a manganese sand filter material with the thickness of 80-130 cm and the grain size gradation of 0.8-1.2 mm; a cobblestone supporting layer with the thickness of 30-40 cm; a backwash water distribution system. The underground water compositely polluted by the iron, manganese and ammonia after aeration overflows into the filter tank from a water inlet tank above the filter tank, and then flows out from the bottom of the filter tank after being filtered;
the biological iron and manganese removal filter tank has the defects of hardening of filter materials and serious short flow; the ferro-manganese oxide on the surface of the filter material particles thickens, and the porosity of a filter layer is increased; the expansion rate of the filtering layer reaches 15-20%, the back washing is 'sand running', the biomass loss is serious, and the like. The effluent TFe of the biological iron and manganese removal filter tank is more than 0.3mg/L or Mn2+> 0.1mg/L or NH4 +-N > 0.5mg/L, maintenance handling is required;
the operation condition before the maintenance of the biological iron and manganese removing filter is as follows: the groundwater after drop aeration is used as the inlet water of the filter, and the main water quality indexes are as follows: DO 7-8 mg/L, TFe 7-18 mg/L, Mn2+1.30～2.30mg/L，NH4 +0.8 to 1.2mg/L of N and 5.5 to 7.0 of pH. The main operating parameters are: the filtering speed is 3-4 m/h, the back washing period is 24-48 h, and the back washing strength is 8-12L/(m)2S), backwashing for 4-5 min;
excavating the filter materials in the filter chamber in sections within 24-48 h, discarding the filter materials with the filter layers at the height sections of 0-1/3 from top to bottom, and reserving the filter materials with the height sections of 1/3-2/3 from top to bottom of 50% of the filter layers and the filter materials with the height sections of 2/3-3/3 from top to bottom of 50% of the filter layers; sieving the retained filter material by a screen with the diameter of a sieve pore of 1.2mm within 24-48 h, mixing the sieved filter material with a new filter material which is the same in volume and is made of the same material, namely a manganese sand filter material, a quartz sand filter material or an anthracite filter material, loading the mixture into a filter layer from top to bottom in 1/3-3/3 height sections, and loading the anthracite filter material with the grain size grading of 1.0-1.5 mm in a reverse grain size manner in a filter layer from top to bottom in 0-1/3 height sections to construct a double-layer filter material filter tank; then, the filter chamber is subjected to strength of 8-10L/(m)2S) backwashing to reduce gas between filter layers and prevent air resistance, wherein the backwashing lasts for 5min, then introducing underground water to be treated to soak the filter material for 48h to reduce gas in pores of the filter material and prevent air resistance, so that the filter material is conveniently adsorbed and saturated as soon as possible; then water is introduced and the filter is operated, wherein the operation filtration speed is 1/3 of the operation filtration speed before the maintenance of the filter, and the backwashing strength is 8-9L/(m)2S) backwashing for 2min, the working period is 24h, and the culture period is TFe when the water flows out of the filter<0.3mg/L and Mn2+<0.1mg/L and NH4 +-N<0.5 mg/L; then the filtration speed is increased to 2/3 of the filtration speed before the filter is maintained, and the backwashing strength is increased to 10-11L/(m)2S) the back washing duration is increased to 3min, the working period is 24h, and under the working condition, the culture period is TFe for ensuring that the effluent of the filter is continuous for 5d<0.3mg/L and Mn2+<0.1mg/L and NH4 +-N<0.5 mg/L; then continuously increasing the filtration rate to the operation filtration rate before the maintenance of the filter tank, adjusting the backwash intensity to the backwash intensity before the maintenance of the filter tank, adjusting the backwash duration to the backwash duration before the maintenance of the filter tank, adjusting the working period to the working period before the maintenance of the filter tank, and continuously culturing the filter tank, wherein the culturing period is to ensure the effluent TFe of the filter tank under the working condition<0.3mg/L and Mn2+<0.1mg/L and NH4 +-N<0.5mg/L and continuous stability for 5 days, which indicates that the startup of the iron-manganese-ammonia purification filter tank is successful after maintenance.
The method successfully realizes the maintenance of the ferro-manganese ammonia biological purification filter tank by selectively screening and retaining mature filter materials with a filter layer of 1/3-2/3 height section of 50% and mature filter materials with a filter layer of 2/3-3/3 height section of 50%, constructing a double-layer filter material filter tank, regulating and controlling backwash strength and backwash duration, regulating and controlling filter speed and filter tank working period, and provides an effective and economic maintenance method for the long-term, efficient and stable operation of the ferro-manganese ammonia biological purification filter tank.
Drawings
FIG. 1 is a schematic diagram of a biological iron-manganese-ammonia purifying filter tank used in the invention.
Drain pipe, water inlet pipe, water outlet pipe, back flushing water pipe, back flushing valve, water inlet valve and back flushing drain valve
⑧ water distribution channel ⑨ water distribution tank ⑩ filter material layer
Figure BDA0001345412380000041
Bearing layer
Figure BDA0001345412380000042
Back-flushing water distribution main pipe
Figure BDA0001345412380000043
Back-flushing water distribution branch pipe
Figure BDA0001345412380000044
Emptying pipe
FIG. 2 is a diagram of a pilot-scale simulated filter column apparatus for biological purification of iron-manganese-ammonia used in example 2.
1 water intake pump, 2 valve, 3 flowmeter, 4 water distributor, 5 overflow port, 6 filter material layer, 7 supporting layer, 8 back flush pump, 9 clear water tank (back flush tank)
FIG. 3 shows the variation of the concentration of iron, manganese and ammonia nitrogen in inlet and outlet water before and after maintenance in the operation process of the filter tank in the method of the present invention in example 1.
FIG. 4 shows the variation of the concentration of iron and manganese in inlet and outlet water during the operation of the filter tank in example 2, which uses the method of the present invention, before and after maintenance.
Detailed Description
The present invention will be further described with reference to the following detailed description, but the scope of the present invention is not limited thereto.
In the invention, filter materials with the height of 0-1/3 from top to bottom of a filter layer are abandoned, and filter materials with the height of 1/3-2/3 from top to bottom of 50% of the filter layer and filter materials with the height of 2/3-3/3 from top to bottom of 50% of the filter layer are retained, and the reason is that: the filtering layer is mainly an iron oxidation removal belt in a section with the height of 0-1/3 from top to bottom, and the filtering material is large in particle size and porosity and is most seriously hardened, so that the filtering layer is discarded; the biomass enriched on the surface of the filter material in the section with the height of 1/3-2/3 from top to bottom of the filter layer is the most abundant, the biological activity is the highest, the removal capability of manganese and ammonia nitrogen is the best, but the particle size of the filter material is also increased and hardened due to the high-efficiency removal belt of manganese, so that only 50% of the filter material which is not subjected to plate-knot screening is used as an active filter material for continuous use; the filtering material of the filtering layer from top to bottom in the height section of 2/3-3/3 is a buffer belt which is set up to prevent the filtering speed of the filtering pool from being too high or the water quality in individual days from being poor, and mainly plays a role of 'insurance' in water quality purification, so the particle size of the filtering material is not increased greatly, hardening rarely occurs and the filtering material can be used continuously, 50% of the filtering material is selected to be replaced because the filtering material of the filtering layer is used for a long time, the particle size is also slightly increased, and in order to reduce the expansion degree of the whole filtering layer, the total specific surface area of the filtering material is increased.
Anthracite filter materials with the particle size of 1.0-1.5 mm are loaded in a filter layer from top to bottom at the height section of 0-1/3 according to a reverse-granularity mode to construct a double-layer filter material filter tank, and the idea lies in that: fe2+Mn capable of being fixed on surface of filter material of manganese removal belt4+The oxide is subjected to oxidation-reduction reaction to cause manganese dissolution, the manganese concentration of effluent is increased, a demanganization biomembrane is damaged, a double-layer filter material filter tank filled with reverse granularity is adopted, an iron removal belt is mainly concentrated on an anthracite filter layer on the upper part of the filter layer, a mixed layer cannot appear after backwashing because the specific gravity of the filter material is light, iron is always positioned on the upper part of the filter layer and removed through the iron removal belt, and the condition that Fe is dissolved in the filter material is effectively avoided2+With Mn4+Oxidation-reduction reaction occurs due to the contact of oxides, so that a manganese oxidizing bacteria biofilm system is effectively protected, and the rapid start of the filter tank is facilitated.
When the filter is in water-filling operation, the operation filtration speed is 1/3 of the operation filtration speed before the filter is maintained, and the backwashing strength is 8-9L/(m)2S) backwashing for 2min, the working period is 24h, and the culture period is TFe when the water flows out of the filter<0.3mg/L and Mn2 +<0.1mg/L and NH4 +-N<0.5 mg/L; then the filtration speed is increased to 2/3 of the filtration speed before the filter is maintained, and the backwashing strength is increased to 10-11L/(m)2S) the back washing duration is increased to 3min, the working period is 24h, and under the working condition, the culture period is TFe for ensuring that the effluent of the filter is continuous for 5d<0.3mg/L and Mn2+<0.1mg/L and NH4 +-N<0.5 mg/L; then continuously increasing the filtration rate to the operation filtration rate before the maintenance of the filter tank, adjusting the backwash intensity to the backwash intensity before the maintenance of the filter tank, adjusting the backwash duration to the backwash duration before the maintenance of the filter tank, adjusting the working period to the working period before the maintenance of the filter tank, and continuously culturing the filter tank, wherein the culturing period is to ensure the effluent TFe of the filter tank under the working condition<0.3mg/L and Mn2+<0.1mg/L and NH4 +-N<0.5mg/L and continuously stabilizes for 5 days. The above regulation and control measures are mainly adopted because: the smaller backwashing strength can not only wash out the ferro-manganese oxide and the aged and fallen biological membrane in the filter tank, but also prevent the biological membrane from falling off due to the serious collision and friction among filter materials. MiningThe short working period and the short back washing duration can prevent the filter material in the filter chamber from hardening in the culture stage and prevent a large amount of organisms from losing due to frequent back washing. By adopting low-speed culture, nutrient substances required by the growth of microorganisms can be supplemented, overlarge shearing force of water flow and difficulty in biological enrichment can be avoided, and certain water yield and qualified water quality of the outlet water of the filter tank can be ensured. The backwashing strength, the backwashing duration and the filtration speed are improved by stages at the later stage, so that the method is more favorable for enhancing the impact load resistance of the biological membrane and is gradually close to the working condition before the filter tank is maintained.
Example 1 was carried out:
raw water of an iron and manganese removal underground water plant is typical ammonia nitrogen (0.8-1.3 mg/L) associated high-iron (7-12 mg/L) high-manganese (about 1.3-1.8 mg/L) underground water, and the dissolved oxygen amount in the aerated raw water is 7-8 mg/L, so that the oxygen demand for removing iron and manganese and ammonia nitrogen through oxidation can be completely met. The main operation parameters before the maintenance of the filter tank are as follows: the filtration speed is 4m/h, the back washing period is 36h, and the back washing strength is 10-12L/(m)2S), backwash for 4 min. The filter tank has been continuously operated for more than 2 years since the last maintenance (manganese sand filter material, 150cm thick), at present, the filter material particles of the filter tank are increased, the filter layer expands, obvious 'sand leakage' phenomenon exists during back washing, the effluent quality can reach the standard before 6 months of maintenance, but in the latter months, the effluent of the filter tank has different degrees of ferro-manganese and ammonia nitrogen exceeding standards, and the filter tank has obvious 'manganese leakage' before 3 months of maintenance. The water plant completes the excavation, replacement and soaking of the filter material in 4d according to the scheme provided by the invention, and completes the restart of the filter chamber in 36 d. The water quality changes of inlet and outlet water before and after the filter chamber maintenance are shown in figure 3.
Example 2 was carried out:
raw water of a certain iron and manganese removal underground water plant is high-iron (total iron is 12-17 mg/L) and high-manganese (1.8-2.3 mg/L) underground water, and the dissolved oxygen amount in the aerated raw water is 6-7 mg/L, so that the requirement of iron and manganese oxidation removal can be completely met. The pilot-scale simulation filter column built in the water plant purification room has the design working conditions that: the filtration speed is 3m/h, the working period is 48h, and the backwashing strength is 11-13L/(m)2S), backwashing for 5 min. The filter chamber is arranged from top to bottomThe filter material (double-layer filter material, wherein the filter layer is sequentially 50cm thick for an anthracite filter material layer and 100cm thick for a quartz sand filter material layer from top to bottom) is continuously operated for more than 2 years, at present, iron in the upper part of a filter column is obviously removed, a hardened iron mud block is also formed in a manganese removal belt in the middle and lower part of the filter tank, the hardened filter layer causes abnormal backwashing of the filter column (the expansion rate of the filter material is low during backwashing), the filter tank has obvious manganese leakage, the working period is obviously shortened to 13-15 hours, and the highest filtering speed can only reach 1.8 m/h. According to the scheme provided by the invention, the excavation and the replacement of the filter material are completed within 3d, and the filter tank is restarted within 27 d. The water quality changes of inlet and outlet water before and after the filter is maintained under the designed working condition are shown in figure 4.

Claims (1)

1. A maintenance method of a ferro-manganese ammonia biological purification filter is characterized by comprising the following steps:
1) the iron-manganese-ammonia biological purification filter is a downward-flowing common rapid filter; a filtering layer, a cobble supporting layer with the thickness of 30-40 cm and a backwashing water distribution system are sequentially arranged in the filter from top to bottom; the filter layer is a manganese sand or quartz sand or anthracite filter material filter layer with the thickness of 130-160 cm and the grain size gradation of 0.8-1.2 mm, or a double-layer filter material filter layer consisting of an anthracite filter material with the thickness of 30-50 cm and the grain size gradation of 1.0-1.5 mm and a manganese sand filter material with the thickness of 80-130 cm and the grain size gradation of 0.8-1.2 mm; the underground water compositely polluted by the iron, manganese and ammonia after aeration overflows into the filter tank from a water inlet tank above the filter tank, and then flows out from the bottom of the filter tank after being filtered;
2) when detecting that the biological iron-manganese ammonia purifying filter tank has effluent TFe>0.3mg/L or Mn2+>0.1mg/L or NH4 +-N>0.5mg/L, maintenance is required;
3) the operation condition before the maintenance of the iron-manganese-ammonia biological purification filter is as follows: the groundwater after drop aeration is taken as the inlet water of the filter, and the water quality indexes are as follows: DO 7-8 mg/L, TFe 7-18 mg/L, Mn2+1.30～2.30mg/L，NH4 +0.8 to 1.2mg/L of N and 5.5 to 7.0 of pH; the operating parameters are as follows: the filtering speed is 3-4 m/h, the back washing period is 24-48 h, and the back washing strength is 8-12L/(m)2·s)，The backwashing lasts for 4-5 min;
4) the maintenance method specifically comprises the following steps: excavating the filter materials in the filter chamber in sections within 24-48 h, discarding the filter materials with the filter layers at the height sections of 0-1/3 from top to bottom, and reserving the filter materials with the height sections of 1/3-2/3 from top to bottom of 50% of the filter layers and the filter materials with the height sections of 2/3-3/3 from top to bottom of 50% of the filter layers; sieving the retained filter material by a screen with the diameter of a sieve pore of 1.2mm within 24-48 h, mixing the sieved filter material with a new filter material which is the same in volume and is made of the same material, namely a manganese sand filter material, a quartz sand filter material or an anthracite filter material, loading the mixture into a filter layer from top to bottom in 1/3-3/3 height sections, and loading the anthracite filter material with the grain size grading of 1.0-1.5 mm in a reverse grain size manner in a filter layer from top to bottom in 0-1/3 height sections to construct a filter material filter layer; then, the filter chamber is subjected to strength of 8-10L/(m)2S) backwashing to reduce gas between filter layers and prevent air resistance for 5min, and then introducing underground water to be treated to soak the filter materials for 48 h; then water is introduced and the filter is operated, wherein the operation filtration speed is 1/3 of the operation filtration speed before the maintenance of the filter, and the backwashing strength is 8-9L/(m)2S) backwashing for 2min, the working period is 24h, and the culture period is TFe when the water flows out of the filter<0.3mg/L and Mn2+<0.1mg/L and NH4 +-N<0.5 mg/L; then the filtration speed is increased to 2/3 of the filtration speed before the filter is maintained, and the backwashing strength is increased to 10-11L/(m)2S) the back washing duration is increased to 3min, the working period is 24h, and under the working condition, the culture period is TFe for ensuring that the effluent of the filter is continuous for 5d<0.3mg/L and Mn2+<0.1mg/L and NH4 +-N<0.5 mg/L; then continuously increasing the filtration rate to the operation filtration rate before the maintenance of the filter tank, adjusting the backwash intensity to the backwash intensity before the maintenance of the filter tank, adjusting the backwash duration to the backwash duration before the maintenance of the filter tank, adjusting the working period to the working period before the maintenance of the filter tank, and continuously culturing the filter tank, wherein the culturing period is to ensure the effluent TFe of the filter tank under the working condition<0.3mg/L and Mn2+<0.1mg/L and NH4 +-N<0.5mg/L and continuous stability for 5 days, which indicates that the startup of the iron-manganese-ammonia purification filter tank is successful after maintenance.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1733618A (en) * 2005-07-27 2006-02-15 东华大学 Process and apparatus for removing ferromanganese from underground water
CN101632880A (en) * 2009-08-03 2010-01-27 北京工业大学 High-efficiency biological purification filter layer and purification method of groundwater with high concentration of iron and manganese
CN103204579A (en) * 2013-03-23 2013-07-17 北京工业大学 Quick recovery method of biological deironing and manganese-removing filter technique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1733618A (en) * 2005-07-27 2006-02-15 东华大学 Process and apparatus for removing ferromanganese from underground water
CN101632880A (en) * 2009-08-03 2010-01-27 北京工业大学 High-efficiency biological purification filter layer and purification method of groundwater with high concentration of iron and manganese
CN103204579A (en) * 2013-03-23 2013-07-17 北京工业大学 Quick recovery method of biological deironing and manganese-removing filter technique

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