CN110963603A - Water supply plant sludge water recycling system for removing enhanced pollutants - Google Patents
Water supply plant sludge water recycling system for removing enhanced pollutants Download PDFInfo
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- CN110963603A CN110963603A CN201911185946.9A CN201911185946A CN110963603A CN 110963603 A CN110963603 A CN 110963603A CN 201911185946 A CN201911185946 A CN 201911185946A CN 110963603 A CN110963603 A CN 110963603A
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- water
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- sludge
- activated carbon
- organic matters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
Abstract
The invention belongs to the technical field of water treatment, and particularly relates to a water supply plant sludge water recycling system for removing enhanced pollutants. The system comprises a high-density tank, an active carbon tank, an ultrafiltration tank and a sludge dewatering room; coagulant polyaluminium chloride polysulfide and high-molecular coagulant anionic polyacrylamide are added at the front end of the high-density tank to remove suspended solids, organic matters and partial heavy metals; removing organic matters and heavy metals in the water by adsorption of wood powder activated carbon in the activated carbon pool; an immersed hollow fiber ultrafiltration membrane is arranged in the ultrafiltration tank to intercept suspended solids, organic matters and pathogenic microorganisms in water and ensure the safety of effluent organisms; sludge at the bottom of the high-density tank can directly enter a sludge dewatering room for dewatering, dewatering filtrate flows back to the sludge discharge water regulating tank, and mud cakes are transported outside. The system is simple, has no pollution waste water discharge and good effluent quality, and can be directly recycled to the front end of the clean water tank of the water making process of a water plant; has important guiding significance for the design and development of the treatment and reuse process of the sludge water of the urban water supply plant.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a water supply plant sludge water recycling system for removing enhanced pollutants.
Technical Field
The water supply plant can produce a large amount of production wastewater, namely sludge discharge wastewater and backwashing wastewater, while producing drinking water. Compared with backwashing water, the sludge water has the characteristics of high turbidity, high organic matters and high heavy metals, so that the sludge water is more difficult to treat, and the sludge water amount accounts for 0.5-1% of the water making process of a water plant. The treatment of sludge water in foreign countries has been carried out in the 40 th century, the sludge water treatment work in China is started late, and the sludge water in water supply plants in China is still mainly discharged directly before the 80 th century in 20 th century. With the development of economy, the pollution problem of directly discharged sludge water to the environment is more and more concerned by society. Therefore, after 80 years, China carries out sludge water treatment work successively, most of water plants in China have built sludge water treatment structures preliminarily so far, but sludge water of water supply plants in a small town is still directly discharged. The established sludge water treatment process mainly comprises the steps of discharging supernatant after concentration, and transporting sludge cakes outside after the concentrated sludge is dehydrated. However, with the shortage of water resources, the treatment and discharge of sludge water can not meet the requirements of the modern environment protection and society, and the recycling of sludge water is gradually concerned by people.
The main pollutants in the discharged muddy water are suspended solids, colloidal substances, organic matters, heavy metals and microorganisms. Because the pollutant content is high and the types are many, the water quality safety of the reuse of the sludge water is emphasized. The combination of the polymer coagulant and the flocculant can quickly and effectively remove suspended solids, colloidal substances and macromolecular organic matters in water, and in addition, part of heavy metals can be adsorbed by coagulated flowers and removed. The activated carbon has a large specific surface area, can quickly adsorb pollutants in water, and particularly has the best adsorption effect on organic matters and heavy metals in water. The pretreatment of raw water and the advanced treatment of a water making process are used more at present, and in summer when algae erupts, powdered activated carbon is added into the raw water in multiple directions to adsorb and remove the algae and organic matters in the water; in the deep treatment, blocky or granular activated carbon is used as the filler of the carbon filter for adsorbing pollutants and culturing microorganisms. The ultrafiltration is also applied to a water recycling process, residual solid particles, organic matters, pathogenic microorganisms and the like in water can be removed by ultrafiltration, and the turbidity of ultrafiltration effluent is basically zero. Therefore, the invention adopts the coagulation-adsorption-ultrafiltration combined process to recycle the muddy water discharged from the water supply plant based on the principles of coagulating sedimentation, adsorption and filtration, and has the advantages of good effluent quality, convenient operation, convenient maintenance and no pollution. The invention meets the requirements of energy saving, environmental protection, no pollution and realization of near zero discharge in the treatment of the production wastewater of water supply plants in China.
Disclosure of Invention
The invention aims to provide a water supply plant sludge water recycling system for removing enhanced pollutants, which has strong capability of removing suspended solids, organic matters, heavy metals and pathogenic microorganisms, small occupied area and low operation cost.
The invention relates to a water supply plant sludge water recycling system for strengthening pollutant removal, which aims at the water supply plant sludge water recycling treatment of high turbidity, high organic matters and high heavy metals including suspended solids, organic matters, heavy metals, pathogenic microorganisms and the like, and comprises the steps of strengthening the removal of the suspended solids and the organic matters by adding a coagulant and a polymeric flocculant; the removal of organic matters and heavy metals is strengthened by wood powder activated carbon in the activated carbon pool; the removal of organic matters, solid particles and pathogenic microorganisms is realized through the ultrafiltration membrane component, and the water quality safety of the effluent is ensured.
The invention relates to a water supply plant sludge water recycling system for removing enhanced pollutants, which comprises:
a sludge water adjusting tank 1 for collecting and adjusting sludge water in a sedimentation tank of a water supply plant;
a high-density clarification tank (high-density tank for short) 3 arranged behind the sludge water adjusting tank 1 pumps the sludge water to the high-density tank 3 through a submersible sewage pump 2, and a coagulant and a flocculant are added into a pipeline behind the submersible sewage pump 2;
the activated carbon pool 4 is arranged behind the high-density pool 3, and an activated carbon layer 5 is arranged in the middle of the activated carbon pool 4;
an immersed hollow ultrafiltration membrane component 7 is arranged in the middle of the ultrafiltration tank 6, and the immersed hollow ultrafiltration membrane component 7 is used for pressurizing and filtering the effluent through a submersible axial-flow pump 8;
a sludge dewatering room 10 for dewatering sludge.
The invention relates to a water supply plant sludge water recycling system for removing enhanced pollutants, which comprises the following working procedures: the method comprises the following steps that muddy water discharged from a city water supply plant enters an adjusting tank 1, the water quantity of the muddy water is adjusted in the adjusting tank 1 and then is pumped into a high-density tank 3 through a submersible sewage pump 2, and polyaluminum chloride sulfate and anionic polyacrylamide are added into a pipeline behind the submersible sewage pump 2, so that a coagulating sedimentation process is carried out. The effluent of the high-density tank 3 flows to an active carbon tank 4 by gravity, the effluent of the active carbon tank 4 flows to an ultrafiltration tank 6 by gravity, and the adsorption and filtration processes are sequentially carried out; the super filter 6 is subjected to membrane water outlet through a submersible axial flow pump 8. The sludge at the bottom of the high-density tank 3 directly enters a sludge dewatering room 10 for dewatering through a submersible sewage pump 9, the dewatered filtrate flows back to the regulating tank, and the mud cakes are transported outside.
In the invention, the adding concentrations of the polyaluminum chloride polysulfides and the anionic polyacrylamide can be controlled to be 10-20mg/L and 0.5-1.5mg/L, preferably 12-18 mg/L and 0.8-1.2 mg/L, and the optimal adding concentrations are 15 mg/L and 1.0 mg/L; the hydraulic retention time of the activated carbon is not less than 120 min, and the optimal hydraulic retention time is 180 min; tests show that the turbidity, organic matters, heavy metals and pathogenic microorganisms of the sludge water have good removal effect.
In the invention, the coagulation sedimentation process is carried out in the high-density tank 3, specifically, the discharged muddy water enters the high-density tank after the water quantity of the regulating tank is regulated, the polyalumnium chloride and PAM added in the pipeline are mixed through the pipeline and then carry out coagulation reaction in the high-density tank, and suspended solids, colloidal substances, organic matters and partial heavy metals are removed through the actions of compressing a double electric layer, adsorbing and bridging and the like. And after the sediment is precipitated by an inclined tube at the upper part of the high-density pond, the turbidity of the effluent is basically maintained below 1 NTU.
In the invention, the adsorption process in the activated carbon pool is that the wood powder activated carbon in the activated carbon pool has a porous structure and a large specific surface area, and organic matters and heavy metals in water are adsorbed by the activated carbon and removed; because organic matters and heavy metals exist in water at the same time, part of the organic matters and the heavy metals can generate a complex reaction, and the generated complex is easier to be adsorbed on the surface of the active carbon, so that the removal of the organic matters and the heavy metals can be improved.
In the invention, the immersed hollow fiber membrane component 7 mainly plays a role in filtration, water adsorbed by the activated carbon tank 4 flows to the ultrafiltration tank 6 by gravity, organic matters and pathogenic microorganisms are effectively intercepted, and the biological safety of effluent is ensured.
In the invention, the sludge dewatering process mainly comprises the steps that the sludge concentration at the bottom of the high-density tank 3 is high, the sludge can directly enter a sludge dewatering room 10 through a submersible sewage pump 9 for dewatering, dewatering filtrate flows back to the sludge water discharge regulating tank 1, and mud cakes are transported outside.
Has the advantages that: according to the invention, the activated carbon pool is arranged behind the high-density pool, the combined removal of organic matters and heavy metals is strengthened through the adsorption of the wood powder activated carbon on the organic matters and the heavy metals, and the removal rate can reach more than 80%. The ultrafiltration tank is arranged behind the active carbon tank, the removal of organic matters and pathogenic microorganisms is realized through the ultrafiltration membrane component, the turbidity of the effluent is basically zero, and the safety of the effluent quality is ensured. Compared with the traditional water supply plant sludge water treatment process, the invention has the advantages of good effluent quality, basically no pollutant discharge, realization of sludge water recycling, and wide environmental protection, economic benefit and application prospect.
Drawings
FIG. 1 is a flow chart of the recycling process of the sludge water of the water supply plant for removing the enhanced pollutants.
In the figure: 1 is a sludge water adjusting tank, 2 is a submersible sewage pump, 3 is a high-density clarification tank, 4 is an activated carbon tank, 5 is an activated carbon layer, 6 is a super filter tank, 7 is an ultrafiltration membrane component, 8 is a submersible axial-flow pump, 9 is a submersible sewage pump, and 10 is a sludge dewatering room.
Detailed Description
The embodiments of the invention will be further described with reference to the accompanying drawings in which:
as shown in the attached drawing, the invention relates to a water supply plant sludge water recycling system for removing enhanced pollutants, which comprises a sludge water adjusting tank 1, a submersible sewage pump 2, a high-density clarification tank 3, an activated carbon tank 4, an activated carbon layer 5, an ultrafiltration tank 6, an ultrafiltration membrane component 7, a submersible axial flow pump 8, a submersible sewage pump 9 and a sludge dewatering room 10. The sludge water is pumped into a high-density tank 3 by a submersible sewage pump 2 after the water quantity of the sludge water is regulated by a regulating tank 1, and 10-20mg/L of polyaluminum sulfate chloride and 0.5-1.5mg/L of anionic PAM are added into a pipeline behind the submersible sewage pump 2 for coagulating sedimentation; the effluent of the high-density tank 3 flows to an active carbon tank 4 by gravity, an active carbon layer 5 is arranged in the active carbon tank 4, the adsorption of organic matters and heavy metals by active carbon occurs in the active carbon layer 5, and the hydraulic retention time of the active carbon tank 4 is not less than 120 min; the water adsorbed by the active carbon flows to an ultrafiltration tank 6 by gravity, suspended particles, organic matters and pathogenic microorganisms are intercepted by an immersed hollow fiber ultrafiltration membrane 7, and the ultrafiltration tank 6 carries out membrane water outlet by a submersible axial flow pump 8; the sludge at the bottom of the high-density tank 3 directly enters a sludge dewatering room 10 for dewatering through a submersible sewage pump 9, the dewatered filtrate flows back to the sludge water discharge regulating tank 1, and the mud cakes are transported outside.
Claims (4)
1. A water supply plant sludge water recycling system for removing enhanced pollutants is characterized in that the removal of suspended solids and organic matters is enhanced by adding a coagulant and a polymeric flocculant; the removal of organic matters and heavy metals is strengthened by wood powder activated carbon in the activated carbon pool; the removal of organic matters, solid particles and pathogenic microorganisms is realized through the ultrafiltration membrane component, and the water quality safety of effluent is ensured: the system comprises:
a sludge water adjusting tank for collecting and adjusting sludge water in the water supply plant sedimentation tank;
the high-density tank is arranged behind the sludge water regulating tank, the sludge water is pumped into the high-density tank through a submersible sewage pump, and a coagulant and a flocculating agent are added into a pipeline behind the submersible sewage pump;
the activated carbon pool is arranged behind the high-density pool, and an activated carbon layer is arranged in the middle of the activated carbon pool;
the device comprises an ultrafiltration tank arranged behind an active carbon tank, wherein an immersed hollow ultrafiltration membrane component is arranged in the middle of the ultrafiltration tank, and the immersed hollow ultrafiltration membrane component is used for pressurizing and filtering water by a submersible axial-flow pump;
a sludge dewatering room for sludge dewatering.
2. The system of claim 1, wherein the system comprises the following steps: the method comprises the following steps that (1) muddy water discharged by a city water supply plant enters an adjusting tank, the water quantity of the muddy water is adjusted in the adjusting tank, the muddy water is pumped into a high-density tank through a submersible sewage pump, polyaluminum chloride sulfate and anionic polyacrylamide are added into a pipeline behind the submersible sewage pump, and solid particles, macromolecular organic matters and partial heavy metals are removed through coagulating sedimentation; then the effluent of the high-density tank flows to an active carbon tank by gravity, the effluent of the active carbon flows to an ultrafiltration tank by gravity, and the adsorption and filtration processes are carried out in sequence; the super filter carries out membrane water outlet through a submersible axial flow pump; the sludge concentration at the bottom of the high-density tank is directly pumped into a sludge dewatering room through a submersible sewage pump for dewatering, the dewatering filtrate flows back to the sludge discharge water regulating tank 1, and the sludge cake is transported outside.
3. The water supply plant sludge water recycling system for enhancing pollutant removal according to claim 1, wherein the concentration of the added polyaluminum chloride is controlled to be 10-20mg/L, and the concentration of the added anionic PAM is controlled to be 0.5-1.5 mg/L.
4. The system as claimed in claim 1, wherein the activated carbon in the activated carbon pool is wood-based activated carbon, and the hydraulic retention time is not less than 100-120 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911185946.9A CN110963603A (en) | 2019-11-27 | 2019-11-27 | Water supply plant sludge water recycling system for removing enhanced pollutants |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911185946.9A CN110963603A (en) | 2019-11-27 | 2019-11-27 | Water supply plant sludge water recycling system for removing enhanced pollutants |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139143A (en) * | 2007-08-14 | 2008-03-12 | 天津市华宇膜技术有限公司 | Hyperfiltration reverse- rinsing water recovery processing method and device thereof |
| CN102336493A (en) * | 2011-08-29 | 2012-02-01 | 中国科学院生态环境研究中心 | Reaction device for deep treatment of drinking water and method for deep treatment of drinking water by water factory |
| CN103319028A (en) * | 2013-07-04 | 2013-09-25 | 天津市自来水集团有限公司 | Recovering method of sludge water of water treatment plant |
| CN107032553A (en) * | 2017-05-25 | 2017-08-11 | 河海大学 | A kind of processing method of sludge water condition in waterworks Water circulation |
-
2019
- 2019-11-27 CN CN201911185946.9A patent/CN110963603A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139143A (en) * | 2007-08-14 | 2008-03-12 | 天津市华宇膜技术有限公司 | Hyperfiltration reverse- rinsing water recovery processing method and device thereof |
| CN102336493A (en) * | 2011-08-29 | 2012-02-01 | 中国科学院生态环境研究中心 | Reaction device for deep treatment of drinking water and method for deep treatment of drinking water by water factory |
| CN103319028A (en) * | 2013-07-04 | 2013-09-25 | 天津市自来水集团有限公司 | Recovering method of sludge water of water treatment plant |
| CN107032553A (en) * | 2017-05-25 | 2017-08-11 | 河海大学 | A kind of processing method of sludge water condition in waterworks Water circulation |
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Application publication date: 20200407 |
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