CN111333282A - Rural black and odorous water body sediment treatment system and method - Google Patents
Rural black and odorous water body sediment treatment system and method Download PDFInfo
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- CN111333282A CN111333282A CN202010083391.3A CN202010083391A CN111333282A CN 111333282 A CN111333282 A CN 111333282A CN 202010083391 A CN202010083391 A CN 202010083391A CN 111333282 A CN111333282 A CN 111333282A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
Abstract
The invention discloses a system and a method for treating rural black and odorous water body sediment, wherein the system mainly comprises: the device comprises a bottom mud pretreatment module, a bottom mud middle-stage treatment module and a bottom mud final treatment module; the sediment pretreatment module comprises: a mud taking unit and a concentrating unit; get mud unit and include grit garbage separation machine, concentrated unit includes: an automatic dosing machine, a stirrer, a mud-water separator and a tail water treatment machine; the sediment middle-section treatment module mainly comprises a fermentation unit, wherein the fermentation unit comprises: a pollution degree monitor, an aerobic fermentation tank, a zymocyte feeding machine and a stirring aerator; the bottom mud final treatment module comprises: pressure filter, desiccator, rubbing crusher, charger and filter, this system can carry out the chemical fertilizer to water bed mud and recycle, and more environmental protection and processing step are simple, are fit for extensively promoting.
Description
Technical Field
The invention relates to the technical field of bottom mud treatment of black and odorous water, in particular to a system and a method for treating bottom mud of black and odorous water in rural areas.
Background
The black and odorous water is an extreme phenomenon of organic pollution and is caused by oxygen deficiency and organic matter putrefaction of water, and the black and odorous state is an extreme state of the water and has characteristics which are greatly different from other states. The physical and chemical environment of the ecological floating bed is expressed as strong reducing property, the organic and inorganic pollution is extremely serious, the water body has peculiar smell and is not suitable for the survival of aquatic organisms, the aquatic vegetation is degraded and even died, and the phytoplankton, the zooplankton and the benthonic animal only have a small amount of pollution-resistant seeds. Food chain breakage, food net support breakage, serious unbalance of an ecological system structure and serious degradation and even loss of functions.
Compared with urban black and odorous water, rural black and odorous water is low in treatment degree and cannot be paid attention to, and soil is wasted.
Disclosure of Invention
In order to solve the technical problem, the invention provides a system and a method for treating the bottom mud of the black and odorous water body in the rural area.
The technical points of the invention are as follows:
a rural black and odorous water body sediment treatment system sequentially comprises the following steps: the device comprises a bottom mud pretreatment module, a bottom mud middle-stage treatment module and a bottom mud final treatment module;
the sediment pretreatment module comprises: the device comprises a sludge taking unit for digging out bottom sludge in the black and odorous water body and a concentration unit for concentrating and dewatering the dug-out bottom sludge;
get mud unit and include the grit rubbish separating centrifuge that can carry out separation treatment with grit rubbish and bed mud in the river course, concentration unit includes in proper order from the process: the automatic chemical dosing machine can solidify and precipitate the sludge taken out by the sludge taking unit, the stirrer is used for accelerating the solidification rate, the mud-water separator is used for separating the precipitated bottom sludge again, and the tail water processor is used for processing the mud water generated by all the concentration units;
the sediment middle-section processing module mainly comprises a fermentation unit for fermenting the pretreated sediment, and the fermentation unit comprises: the fermentation system comprises a pollution degree monitor for monitoring the pollution degree of bottom sediment in advance, an aerobic fermentation tank for fermentation, a zymocyte feeding machine for automatically feeding materials according to the data detected by the pollution degree monitor, and a stirring aerator for promoting the fermentation rate;
the final sediment treatment module mainly comprises the following components in sequence according to the process: the device comprises a filter press for dewatering fermented bottom mud press cakes, a dryer for deeply dewatering the mud cakes, a crusher for crushing the mud cakes into particles, a charger for assembling the crushed bottom mud fertilizer and a filter for treating waste water and waste gas generated by the filter press and the dryer.
Further, a composite conditioner for quenching and tempering the bottom mud is further arranged in the automatic dosing machine, and comprises the following components in percentage by mass: 40-50% of asbestos-free microporous calcium silicate powder, 30-40% of gel wrapping agent and the balance of polymeric aluminum ferric silicate; the preparation method of the gel wrapping agent comprises the following steps: preparing suspension of nano activated carbon powder and water according to a certain mass-volume ratio, sequentially adding polyacrylamide, ammonium persulfate and carboxymethyl chitosan, stirring and aging for 0.5h at room temperature, standing for 15-20h to obtain a gel product, granulating at low temperature, and drying to obtain gel particles, namely the gel wrapping agent. The particle size of the asbestos-free microporous calcium silicate powder is 1-2000 microns, the asbestos-free microporous calcium silicate powder is widely used for heat preservation, heat insulation, fire prevention and sound insulation of equipment pipelines and wall roofs in the fields of electric power, metallurgy, petrifaction, buildings, ships and the like at present, and is a novel hard heat preservation material which is most popular with departments of electric power, petroleum, chemical industry, metallurgy and the like at present, but researches show that the micron-sized powder of the asbestos-free microporous calcium silicate powder is used for treating bottom mud, is added into the bottom mud under the combined action of the asbestos-free microporous calcium silicate powder and polymeric aluminum ferric silicate, can obtain a good effect of promoting dispersion of agglomerates in mud after being stirred by a stirrer, and accelerates solidification of the bottom mud and separation of mud and water; the composite conditioner provided by the invention has a wide application range, can be used for polluted bottom mud, and is particularly suitable for the bottom mud of black and odorous water in rural areas.
Furthermore, the addition amount of the compound conditioner is 0.1-0.5%.
Furthermore, a plurality of aeration heads are arranged on the stirring fan blades of the stirring aerator, so that the aeration can be carried out while stirring, the aeration in the aerobic fermentation tank is more uniform, and the quality and the efficiency of the bottom mud fermentation are improved.
Furthermore, the filter press is a plate-and-frame filter press, so that the bottom mud is formed more quickly, and mud cakes are crushed more easily.
Furthermore, the crusher can crush the fermented bottom mud to uniform small particles of 80 meshes, and the uniform small particles can ensure that the fertilizer content of each throwing part is relatively consistent when the bottom mud fertilizer is used, so that the crops can grow uniformly.
Furthermore, the zymophyte throwing machine is provided with a spare throwing box for throwing in the zymophyte when the zymophyte is seriously polluted, so that the phenomenon that the pollution degree is too high and the used zymophyte cannot achieve the optimal effect is prevented.
Further, the treatment method of the rural black and odorous water body comprises the following steps:
s1: extracting the bottom mud in the black and odorous water body into a sludge tank through a sand-stone garbage separator of a mud taking unit of the bottom mud pretreatment module;
s2: concentrating sludge in a sludge tank by a concentration unit of a bottom sludge pretreatment module, adding a flocculating agent by an automatic dosing machine to precipitate suspended matters in water, stirring the bottom sludge to ensure that the flocculating agent is fully contacted with the bottom sludge to solidify the bottom sludge, separating the bottom sludge in the sludge tank by a sludge-water separator, and filtering the residual sewage by a tail water processor and then discharging;
s3: conveying the solidified and concentrated bottom sludge to a fermentation unit of a bottom sludge middle-section treatment module through an auger for fermentation, detecting components in the sludge through a pollution degree monitor, recording detected component data, preventing the bottom sludge from being in an aerobic fermentation tank, putting corresponding fermentation bacteria according to the detected component data, and starting a stirring aerator to rapidly ferment the sludge;
s4: the fermented bottom mud fertilizer is transmitted to a bottom mud final treatment module, a filter press is pumped to 0.2-0.5Mpa for pressing cakes, the bottom mud fertilizer after being subjected to filter pressing is dried in a drier, is crushed into 80-mesh uniform particles by a crusher and then is subpackaged by a charging machine, the filter is arranged between the drier and the filter press, and waste gas and waste water generated by the drier and the filter press are purified.
Still further, the fermentation unit further comprises the steps of: when the pollution degree detected by the pollution degree monitor is serious, a standby feeding box of the zymophyte feeding machine is opened and standby bacteria are fed.
Compared with the prior art, the invention has the beneficial effects that:
firstly, adopt this system to handle the bed mud of black and odorous water body, through dividing into three sections: the pretreatment, the middle-stage treatment and the final treatment lead the bottom mud to be converted into the utilizable bottom mud fertilizer through one procedure, thereby not only protecting the rural water environment, but also saving the cost of the farmers in rural areas for purchasing the fertilizer.
The second detects the contamination composition in the sediment through setting up the pollution degree monitor, through taking notes the contamination composition, drops into suitable zymophyte and ferments, improves the fermentation quality and the efficiency of sediment, simultaneously, has practiced thrift the waste of zymophyte.
Thirdly, through set up reserve batch feed case at fermentation tubes batch feeder, can make under the serious condition of bed mud pollution degree, the more effectual not enough condition of solution fermentation tubes more fast guarantees going on smoothly of fermentation process.
Drawings
FIG. 1 is a system framework diagram of the present invention;
FIG. 2 is a flow chart of the use of the spare batch box of the present invention.
Detailed Description
Example (b):
as shown in the title 1, a system for treating bottom mud of black and odorous water in rural areas sequentially comprises the following steps: the device comprises a bottom mud pretreatment module, a bottom mud middle-stage treatment module and a bottom mud final treatment module;
the sediment pretreatment module comprises: the device comprises a sludge taking unit for digging out bottom sludge in the black and odorous water body and a concentration unit for concentrating and dewatering the dug-out bottom sludge.
Get the grit rubbish separating centrifuge that the mud unit can carry out separation treatment with grit rubbish and bed mud in the river course, grit rubbish separating centrifuge purchases in Wei environmental protection science and technology Limited's vibration type grit separating centrifuge in the Weifang, concentrated unit includes in proper order from the process: the sludge treatment device comprises a flocculating agent automatic dosing machine which is purchased from Guangzhou gold point environmental protection engineering limited company and can solidify and precipitate sludge taken out by a sludge taking unit, a stirrer for accelerating the solidification rate, a mud-water separator for separating precipitated bottom sludge again and a tail water treatment machine for treating mud water generated by all concentration units, wherein the mud-water separator is purchased from an LWnj series mud separation dehydrator of Zhejiang environmental protection science and technology limited company, an active carbon filter layer and a sewage disinfectant are contained in the tail water treatment machine, the active carbon filter layer is a spiral filter tube, so that the filtering effect can be increased, and the filtering path can be prolonged, and the sewage disinfectant is purchased from a sewage disinfectant of Shanghai technical service limited company.
The sediment middle-section processing module mainly comprises a fermentation unit for fermenting the pretreated sediment, and the fermentation unit comprises: a pollution degree monitor for monitoring the pollution degree of the sediment in advance, an aerobic fermentation tank for fermentation, a zymocyte feeding machine for automatically feeding materials according to the data detected by the pollution degree monitor, and a stirring aerator for promoting the fermentation rate, wherein the pollution degree monitor adopts a pollution degree rapid monitor of Zhongkexian science and technology (Shenzhen) Limited company, can rapidly monitor the heavy metal components in the sludge, meanwhile, the monitored metal elements in the RCRA regulation and the pollution metal elements preferentially controlled by EPA such As Pb, Cr, Mn, Hg, Ni, Ba, Cd, Sb, Fe, Zn, Ti, Cu, Se, Bi, Ag, Sn, As, W, Au, V, Re, Zr and Nb in the sludge are accurately analyzed, and the aerobic fermentation tank is a sludge rapid fermentation tank of Zhengzhou Dingcheng mechanical equipment limited company.
The final sediment treatment module mainly comprises the following components in sequence according to the process: the plate and frame type filter press is used for dewatering fermented bottom mud cakes, the dryer is used for deeply dewatering the mud cakes, the crusher is used for crushing the mud cakes into particles, the charger is used for assembling the crushed bottom mud fertilizer, and the filter is used for treating waste water and waste gas generated by the filter press and the dryer, the crusher can crush the fermented bottom mud into 80-mesh uniform small particles, the plate and frame type filter press adopts a plate and frame type filter press of Shanghai large filtering equipment limited company, the charger adopts an automatic charger of a Wen letter machine, the filter adopts a bipolar plasma purifier with the model of LYL-270-2A, the dryer adopts a conservative technology mesh belt type sludge dryer, the device can carry out intelligent temperature adjustment, the cost is saved, the drying effect of the mesh belt type dryer is better, and the movable sludge crusher of a bright manufacturing factory is adopted by the crusher, the equipment can be moved randomly and is convenient to combine.
The treatment process of the rural black and odorous water body comprises the following steps:
s1: extracting the bottom mud in the black and odorous water body into a sludge tank through a sand-stone garbage separator of a mud taking unit of the bottom mud pretreatment module;
s2: concentrating sludge in a sludge tank by a concentration unit of a bottom sludge pretreatment module, adding a flocculating agent by an automatic dosing machine to precipitate suspended matters in water, stirring the bottom sludge for 0.5h after precipitating for 0.5h, fully contacting the flocculating agent with the bottom sludge, continuing precipitating for 0.5h to solidify the bottom sludge, separating the bottom sludge in the sludge tank by a sludge-water separator, and discharging the residual sewage after filtering by a tail water processor;
s3: the sediment after will solidifying concentration is transported to the fermentation unit of sediment middle-section processing module through the auger and is fermented, detects the composition in mud through the pollution degree monitor earlier, and the composition data that detect record places good oxygen fermentation tank with the sediment in, puts in corresponding zymophyte according to the composition data that detect, and the microorganism that this time puts into is counted according to weight percent, includes: 10% of photosynthetic bacteria, 10% of saccharomycetes, 10% of lactic acid bacteria, 30% of nitrobacteria and 40% of bacillus subtilis, and opening a stirring aerator to rapidly ferment the sludge for 3 d;
s4: the fermented bottom mud fertilizer is transmitted to a bottom mud final treatment module, a filter press is pumped to 0.2-0.5Mpa for pressing cakes, the bottom mud fertilizer after being subjected to filter pressing is dried in a drier, is crushed into 80-mesh uniform particles by a crusher and then is subpackaged by a charging machine, the filter is arranged between the drier and the filter press, and waste gas and waste water generated by the drier and the filter press are purified.
Example 2:
the embodiment 2 is different from the embodiment 1 in that:
as shown in fig. 2, a data analysis module is installed on the contamination level monitor, and a contamination level critical value is set, and the data analysis module analyzes the detected data to determine whether to operate the spare material feeding box for feeding, and the critical value is set as shown in table 1.
Table 1: critical value of pollutant component of bottom mud
Wherein, when the critical value exceeds 1%, the spare material feeding box can feed 8% more zymocyte, and the component concentration of the zymocyte used in the spare material feeding box is improved by 5% compared with that of the zymocyte in the zymocyte feeding machine.
The data analysis module is a 51 single chip microcomputer, and after the single chip microcomputer processes data, the electromagnetic valve on the standby batch feeder is operated through a relay to carry out microorganism throwing.
Example 3:
the example 3 differs from the example 1 in that:
the automatic dosing machine is also internally provided with a composite conditioner for quenching and tempering the bottom mud, and the composite conditioner comprises the following components in percentage by mass: 50% of asbestos-free microporous calcium silicate powder, 40% of gel wrapping agent and the balance of polymeric aluminum ferric silicate; the preparation method of the gel wrapping agent comprises the following steps: preparing 12g of nano activated carbon powder and 500ml of water into a suspension, sequentially adding 120g of polyacrylamide, 18g of ammonium persulfate and 20g of carboxymethyl chitosan, stirring and aging for 0.5h at room temperature, standing for 18h to obtain a gel product, granulating at 40 ℃, and drying to obtain gel particles, namely the gel wrapping agent, wherein the particle size of the asbestos-free microporous calcium silicate powder is 1-2000 microns.
Compared with the example 1, the composite conditioner is added in a weight ratio of 0.2%, and the contents of heavy metal, organic pollutants and microorganisms in the final effluent are greatly reduced, and the curing time of the bottom mud is shortened by 2/3, so that the composite conditioner added in the invention has the effects of accelerating the curing of the bottom mud and separating mud from water, can effectively wrap and adsorb the heavy metal, the organic pollutants and the microorganisms in the bottom mud, and greatly reduces the content of the pollutants in the mud finally generated by the bottom mud.
Comparative example
The influence of the addition amount of the composite conditioner on the treatment effect of the bottom mud is researched.
The compound conditioner is added in the addition amounts of 0.03%, 0.1%, 0.2%, 0.5%, 0.8% and 1% respectively, and the rest treatment methods are the same as the example 3, and as a result, when the addition amount of the compound conditioner is less than 0.1%, the content of heavy metals, organic pollutants and microorganisms in the final effluent is not obviously reduced, the bottom mud solidification time is longer than that of the example 3, when the addition amount of the compound conditioner is more than 0.5%, the content of heavy metals, organic pollutants and microorganisms in the final effluent is not greatly different from that of the example 3, the solidification time is basically consistent, the usage amount is saturated, the usage amount is not increased greatly, and therefore the most suitable usage amount of the compound conditioner is 0.1-0.5%.
Claims (9)
1. A rural black and odorous water body sediment treatment system is characterized by comprising the following components in sequence according to the process: the device comprises a bottom mud pretreatment module, a bottom mud middle-stage treatment module and a bottom mud final treatment module;
the sediment pretreatment module comprises: the device comprises a sludge taking unit for digging out bottom sludge in the black and odorous water body and a concentration unit for concentrating and dewatering the dug-out bottom sludge;
get mud unit and include the grit rubbish separating centrifuge that can carry out separation treatment with grit rubbish and bed mud in the river course, concentration unit includes in proper order from the process: the automatic chemical dosing machine can solidify and precipitate the sludge taken out by the sludge taking unit, the stirrer is used for accelerating the solidification rate, the mud-water separator is used for separating the precipitated bottom sludge again, and the tail water processor is used for processing the mud water generated by all the concentration units;
the sediment middle-section processing module mainly comprises a fermentation unit for fermenting the pretreated sediment, and the fermentation unit comprises: the fermentation system comprises a pollution degree monitor for monitoring the pollution degree of bottom sediment in advance, an aerobic fermentation tank for fermentation, a zymocyte feeding machine for automatically feeding materials according to the data detected by the pollution degree monitor, and a stirring aerator for promoting the fermentation rate;
the final sediment treatment module mainly comprises the following components in sequence according to the process: the device comprises a filter press for dewatering fermented bottom mud press cakes, a dryer for deeply dewatering the mud cakes, a crusher for crushing the mud cakes into particles, a charger for assembling the crushed bottom mud fertilizer and a filter for treating waste water and waste gas generated by the filter press and the dryer.
2. The rural black and odorous water body sediment treatment system of claim 1, wherein a compound conditioner for conditioning sediment is further arranged in the automatic dosing machine, and the compound conditioner comprises the following components in percentage by mass: 40-50% of asbestos-free microporous calcium silicate powder, 30-40% of gel wrapping agent and the balance of polymeric aluminum ferric silicate; the preparation method of the gel wrapping agent comprises the following steps: preparing suspension of nano activated carbon powder and water according to a certain mass-volume ratio, sequentially adding polyacrylamide, ammonium persulfate and carboxymethyl chitosan, stirring and aging for 0.5h at room temperature, standing for 15-20h to obtain a gel product, granulating at low temperature, and drying to obtain gel particles, namely the gel wrapping agent.
3. The rural black and odorous water body sediment treatment system of claim 2, wherein the addition amount of the compound conditioner is 0.1-0.5%.
4. The rural black and odorous water body sediment treatment system of claim 1, wherein a plurality of aeration heads are arranged on the stirring blades of the stirring aerator, and aeration can be carried out while stirring.
5. The rural black and odorous water body sediment treatment system of claim 1, wherein the filter press is a plate and frame filter press.
6. The rural black and odorous water body sediment treatment system of claim 1, wherein the crusher can crush fermented sediment to 80-mesh uniform small particles.
7. The rural black and odorous water body sediment treatment system of claim 1, wherein the fermentation tubes putting machine is provided with a spare feeding box for putting in severe pollution.
8. The method for treating the bottom mud in the rural black and odorous water body by using the system according to any one of claims 1 to 7, which is characterized by comprising the following steps:
s1: extracting the bottom mud in the black and odorous water body into a sludge tank through a sand-stone garbage separator of a mud taking unit of the bottom mud pretreatment module;
s2: concentrating sludge in a sludge tank by a concentration unit of a bottom sludge pretreatment module, adding a flocculating agent by an automatic dosing machine to precipitate suspended matters in water, stirring the bottom sludge to ensure that the flocculating agent is fully contacted with the bottom sludge to solidify the bottom sludge, separating the bottom sludge in the sludge tank by a sludge-water separator, and filtering the residual sewage by a tail water processor and then discharging;
s3: conveying the solidified and concentrated bottom sludge to a fermentation unit of a bottom sludge middle-section treatment module through an auger for fermentation, detecting components in the sludge through a pollution degree monitor, recording detected component data, preventing the bottom sludge from being in an aerobic fermentation tank, putting corresponding fermentation bacteria according to the detected component data, and starting a stirring aerator to rapidly ferment the sludge;
s4: the fermented bottom mud fertilizer is transmitted to a bottom mud final treatment module, a filter press is pumped to 0.2-0.5Mpa for pressing cakes, the bottom mud fertilizer after being subjected to filter pressing is dried in a drier, is crushed into 80-mesh uniform particles by a crusher and then is subpackaged by a charging machine, the filter is arranged between the drier and the filter press, and waste gas and waste water generated by the drier and the filter press are purified.
9. The method of claim 8, wherein the step S4 further comprises the steps of: when the pollution degree detected by the pollution degree monitor is serious, a spare feeding box of the zymophyte feeding machine is opened and spare bacteria are fed.
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| CN114212964A (en) * | 2021-12-13 | 2022-03-22 | 重庆德润环境有限公司 | Resource utilization method for river and lake dredging sediment |
| CN114772883A (en) * | 2022-05-16 | 2022-07-22 | 中国矿业大学 | Treatment method of black and odorous water body bottom mud and application of black and odorous water body bottom mud in preparation of baking-free bricks |
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| CN111333282B (en) | 2022-04-12 |
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