CN104803573A - Off-site treatment method and system for bottom mud polluted by heavy metals in river - Google Patents
Off-site treatment method and system for bottom mud polluted by heavy metals in river Download PDFInfo
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Abstract
The invention provides an off-site treatment method and system for mud polluted by heavy metals in a river. The method comprises the following steps of: (1) conveying dug bottom mud to the bank, washing off pebble, macadam and coarse sand, and performing thermal refining treatment on the bottom mud containing a leacheate; (2) performing mud and water separation on the bottom mud subjected to the thermal refining treatment; (3), sieving mud fluid subjected to the mud and water separation, and sieving out medium-fine sand; (4) removing coarse mud from the undersized mud fluid; (5) performing mud and water separation on the mud fluid, and conditioning the bottom mud with relatively high concentration by use of a flocculant; (6) dewatering the conditioned mud fluid; (7)mixing and stirring the dewatered bottom mud and a stabilizer solution, and performing stable consolidation treatment. The system comprises a roller stone washer, a mud collection pool, a spiral sand washer, a mud fluid mixing and conditioning pool, a mud fluid precipitation pool, a vibrating sieve, a hydraulic swirler, a mud fluid condensation pool, a mud fluid conditioning pool, mechanical dewatering equipment and stable consolidation stirring equipment. The method and the system are convenient to implement and operate, good in treatment effect and free from secondary pollution.
Description
Technical field
The present invention relates to a kind of governing system and the administering method thereof that are subject to heavy metal polluted bed mud for water bodys such as seasonal streams (containing river, river, rivers, river course), belong to the improvement recovery technique field of polluted bed mud.
Background technology
Bed mud is the superficial deposit material of water bottom, is the mixture of microorganism, soil ulmin, soil and silt etc., is deposited on water bottom is formed through long-time physical chemistry, biological action and water body transmission.Bed mud can reflect the historical process that water body develops, and is the important component part of the natural water ecosystems such as river, lake, mouth of the river beach.
Heavy metal in bed mud comes from atmospheric falling dust, precipitation, soil erosion, rainwash, all kinds of sewage, solid refuse and agricultural chemicals etc., there is the features such as chronicity, cumulative bad, latent and non-reversibility, by food chain thousands of hundred times ground enrichment, be finally detrimental to health.
Current countries in the world to the control and plan of Heavy Metal Pollution in Sediments and Treatment process scheme different, especially in China, the factor impacts such as contaminated and Economy Contrast, still do not possess the condition of comprehensively carrying out Heavy Metal Pollution in Sediments control.Different according to the pollution level of polluted water body, in conjunction with the implementation condition of contaminated site, the recovery technique of heavy metal polluted bed mud conventional at present is mainly divided into in-situ treatment technology and dystopy treatment technology.
In-situ treatment technology mainly comprises original position phytoremediation and in-situ materials soverlay technique, its situ phytoremediation is low, simple to operate with its cost, not easily produce the advantages such as secondary pollution and receive much concern, but still it is low to there is processing efficiency, plant growing is subject to the defect such as local climate, the impact of river course flood situation.In-situ materials soverlay technique is at bed mud surface coverage passivating material, block heavy metal to the delivery pathways in water body, affect larger by the physicochemical property of covering material and the water conservancy hydrological characteristics of natural water, and there is no reliable covering material dispensing device at present, realize all even larger without leak source covering difficulty.Therefore, for heavy contamination water body or in-situ treatment difficulty larger time, normal adopt dystopy treatment technology.
Seasonal stream, also known as broken stream, seasonal river, refers to that river is in the dry season, and river stops, riverbed is exposed; Abundance of water season, form current, even flood Pentium.This kind of river flows through the region of high temperature and drought usually, and mean annual discharge is less, but because of heavy rain, snow melt cause flood peak very large.Now because of the mankind to the excessive diversion in river, damming to make live stream become seasonal stream.The continental river of China mostly is seasonal stream.
Dystopy treatment technology is a kind of " Ex-situ remediation method of heavy metal polluted bed mud " disclosed in CN102372406, primarily of sediment digging and conveying, the antiseepage of reparation district and draining, bed mud modifying agent with microbial strains adds, microorganism and plant combined reparation, wastewater treatment and plant harvesting and incineration disposal unit form; Concrete steps first carry out repairing addressing and the Anti-seeping technology in district, adopt engineering method that heavy metal polluted bed mud is dredged again and be transported to and repair district, then the discharging consolidation process of bed mud is carried out, then bed mud modifying agent is added and microbial strains fully mixes with bed mud and cultivates plant, finally gathering in plant after being burned, being transported to hazardous waste landfill landfill or for reclaiming heavy metal element burning ash.The dredging of bed mud dystopy combines with plant absorbing process method by the method, compared with polluted bed mud chemical treatment method, there is low, the eco-friendly advantage of processing cost, but due to needs dredging, it easily produces and pollutes release in Dredging Process, affects Upper water's quality; In addition, for the bed mud that pollution level is heavier, plant is difficult to grow in bed mud, also limit the application of the method.
Therefore, need badly for seasonal stream, in detailed sediment pollution on-site investigation and hydrological survey basis, dispose requirement according to heavy metal contamination process, exploitation is applicable to dystopy governing system and the administering method thereof of seasonal stream hydrologic condition and heavy metal polluted bed mud.
Summary of the invention
The present invention is directed to the problem that current seasonal stream lacks system and heavy metal polluted bed mud Treatment process targetedly, provide a kind of and be convenient to that enforcement, regulation effect are good, the river heavy metal polluted bed mud dystopy administering method that can not produce secondary pollution and system.
River of the present invention heavy metal polluted bed mud dystopy administering method, comprises the following steps:
(1) bed mud dug out is transported on the bank, adopt river drip washing, the particle diameter washed out is greater than to cobble and the rubble detection analysis heavy metal content of 4.75mm, heavy metal content meets building materials use standard, direct outward transport recycling, if heavy metal content exceeds standard, then by leacheate, chemical leaching is carried out to bed mud; Carrying out washed-out sand process to the bed mud after drip washing, is that the coarse sand of 1.18mm ~ 4.75mm adopts river drip washing to carry out eccysis by wherein particle diameter; Modifier treatment is carried out to the bed mud containing leacheate;
(2) mud-water separation is carried out to the bed mud after modifier treatment, supernatant liquor containing leacheate is processed, leacheate after process meets recycling of service requirements, can not service requirements be met but the direct discharge of discharging water body requirement can be met, service requirements can not be met and can not meet again discharge water body requirement, carry out precipitation and recycle;
(3) sieve the mud after mud-water separation, screen out the middle fine sand that particle diameter is 0.075mm ~ 1.18mm, middle fine sand is analysis heavy metal content after testing, meets recycling requirement, directly transport outward recycling; As middle fine sand analysis heavy metal content overproof after testing, by stablizer, chemical leaching is carried out to bed mud;
(4) mud under sieve screens out by hydrocyclone the thick mud that particle diameter is 0.020mm ~ 0.075mm, the thick mud screened out analysis heavy metal content after testing, meets recycling requirement, directly transports outward recycling;
(5) mud after hydrocyclone process carries out mud-water separation, supernatant liquor containing stablizer and heavy metal carries out chemical precipitation process, qualified discharge after tail water after process satisfied discharge water body standard-required, the bed mud that concentration is higher is nursed one's health by flocculation agent;
(6) mud after conditioning dewaters, and as the bed mud after dehydration meets the standard-required in ultimate disposal place, directly outer running is rationally disposed; As the bed mud after dehydration directly can not meet the standard-required in ultimate disposal place, then make bed mud water ratio meet follow-up stable curing and stir requirement;
(7) bed mud after dehydration and stabiliser solution carry out abundant mix and blend reaction, and carry out stable curing process, the bed mud after stable curing process should meet the standard-required in ultimate disposal place.
Realize the river heavy metal polluted bed mud dystopy governing system of aforesaid method, by the following technical solutions:
This system, comprises roller-type stone washing machine, collection mud sump, screw sand washer, the molten medicine device of leacheate, mud mixes modified pond, mud settling sump, ring waste reaction tank, leacheate precipitation pond for recovering, vibratory screening apparatus, hydrocyclone, mud concentration basin, mud conditioner, mechanical dewatering equipment, stable curing whipping device, tail water chemical reaction pond, tail water chemical precipitation pond, the molten medicine device of flocculation agent and the molten medicine device of stablizer; All molten with the leacheate medicine device of roller-type stone washing machine and screw sand washer is connected; Roller-type stone washing machine is connected with collection mud sump, collection mud sump is connected with screw sand washer by the lift pump set within it, screw sand washer, mud mix modified pond, mud settling sump, ring waste reaction tank and leacheate precipitation pond for recovering be connected successively, mud settling sump is connected with vibratory screening apparatus by the lift pump set within it, vibratory screening apparatus is connected with hydrocyclone by lift pump, and hydrocyclone, mud concentration basin, mud conditioner, mechanical dewatering equipment are connected successively with stable curing whipping device; Mud concentration basin, tail water chemical reaction pond are connected successively with tail water chemical precipitation pond; The molten medicine device of stablizer is connected with vibratory screening apparatus; The molten medicine device of flocculation agent is connected with sludge conditioning pond.
Implementation and operation is convenient in the present invention, has stronger specific aim, and regulation effect is good, can not produce secondary pollution.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of seasonal stream heavy metal polluted bed mud dystopy governing system of the present invention.
In figure: 1, roller-type stone washing machine, 2, mud sump is collected, 3, screw sand washer, 4, the molten medicine device of leacheate, 5, mud mixes modified pond, 6, mud settling sump, 7, ring waste reaction tank, 8, leacheate precipitation pond for recovering, 9, high frequency linear vibratory screening apparatus, 10, hydrocyclone, 11, mud concentration basin, 12, mud conditioner, 13, mechanical dewatering equipment, 14, stable curing whipping device, 15, tail water chemical reaction pond, 16, tail water chemical precipitation pond, 17, the molten medicine device of flocculation agent, 18, the molten medicine device of stablizer.
Embodiment
As shown in Figure 1, seasonal stream heavy metal polluted bed mud dystopy governing system of the present invention, comprises roller-type stone washing machine 1, collection mud sump 2, screw sand washer 3, the molten medicine device of leacheate 4, mud mixes modified pond 5, mud settling sump 6, ring waste reaction tank 7, leacheate precipitation pond for recovering 8, vibratory screening apparatus 9, hydrocyclone 10, mud concentration basin 11, sludge conditioning pond 12, mechanical dewatering equipment 13, stable curing whipping device 14, tail water chemical reaction pond 15, tail water chemical precipitation pond 16, the molten medicine device of flocculation agent 17 and the molten medicine device 18 of stablizer.All molten with the leacheate medicine device 4 of roller-type stone washing machine 1 and screw sand washer 2 is connected.Roller-type stone washing machine 1 is connected with collection mud sump 2, and collection mud sump 2 is connected with screw sand washer 3 by the lift pump set within it.Screw sand washer 3, mud mix modified pond 5, mud settling sump 6, ring waste reaction tank 7 and leacheate precipitation pond for recovering 8 be connected successively, mud settling sump 6 is connected with vibratory screening apparatus 9 by the lift pump set within it.Vibratory screening apparatus 9 is connected with hydrocyclone 10 by lift pump, and hydrocyclone 10, mud concentration basin 11, mud conditioner 12, mechanical dewatering equipment 13 are connected successively with stable curing whipping device 14.Mud concentration basin 11, tail water chemical reaction pond 15 are connected successively with tail water chemical precipitation pond 16.The molten medicine device 18 of stablizer is connected with vibratory screening apparatus 9.The molten medicine device 17 of flocculation agent is connected with sludge conditioning pond 12.Vibratory screening apparatus 9 can adopt high frequency linear vibratory screening apparatus.The molten medicine device of leacheate 4, the molten medicine device of stablizer 18 can adopt existing Integral dissolving medicine feeding device with the molten medicine device of flocculation agent 17.Mechanical dewatering equipment 13 can adopt plate-and-frame filter press and centrifuge etc.Stable curing whipping device 14 can adopt various stirrer.
The specific implementation process that said system carries out the improvement of seasonal stream heavy metal polluted bed mud dystopy is as described below.
(1) before process, room is studied and field pilot-scale first by experiment, determine the content situation of heavy metal in the size distribution situation of target section bed mud and different-grain diameter bed mud, the on-site ultimate disposal condition of integration project (comprises Land_use change, building materials utilize, landfill and burning etc.) and Financial cost comparative analysis, comprehensively determine the Sieving and casing requirement for the treatment of processes, determine cobble and rubble (particle diameter > 4.75mm), coarse sand (1.18mm < particle diameter < 4.75mm), the concrete Sieving and casing of middle fine sand (0.075mm < particle diameter < 1.18mm) and mud (0mm < particle diameter < 0.075mm) and corresponding device quantity.
(2) bed mud dug out by the geotechnological machinery such as excavator, dozer is due to cobble, rubble and the coarse sand etc. containing Large stone (being often referred to particle diameter > 1mm), first roller-type stone washing machine 1 is transported to through closing bed mud transport trolley, river drip washing is adopted to carry out eccysis on cobble wherein and rubble (4.75mm < particle diameter < 10.0mm), the cobble washed out and rubble after testing analysis heavy metal meet related building material and use standard, directly transport outward recycling; As the cobble that washes out and rubble after testing analysis heavy metal exceed standard, the leacheate (EDTA etc.) that the molten medicine device 4 of leacheate can be adopted to prepare carries out chemical leaching to bed mud, by adjusting the concentration of leacheate, guarantee that the cobble of eccysis and rubble meet relevant criterion requirement.Bed mud after drip washing enters collection mud sump 2 subsequently, and screw sand washer 3 delivered to by the lift pump in collection mud sump 2, adopts river drip washing to carry out eccysis coarse sand (1.18mm < particle diameter < 4.75mm) wherein.Bed mud after screw sand washer 3 drip washing enters mud and mixes modified pond 5.
(3) through high-pressure hydraulic wash away cobble, rubble and coarse sand that the bed mud that obtains contains more time, through the direct load drum stone scrubber 1 of mud lift pump, said process can be repeated, also directly can be promoted to mud and mix modified pond 5.
(4) bed mud that mud mixes in modified pond 5 enters mud settling sump 6, carry out mud-water separation, supernatant liquor containing a large amount of leacheate enters ring waste reaction tank 7 and processes, leacheate after process can meet service requirements, enter the molten medicine device 4 of leacheate to recycle, leacheate after process can not meet service requirements but can to meet discharge water body and requires, direct discharge, leacheate after process can not meet service requirements and can not to meet again discharge water body and require, delivers to leacheate precipitation pond for recovering 8 process through lift pump.
(5) mud after mud settling sump 6 mud-water separation delivers to vibratory screening apparatus 9 through lift pump, by adjusting the aperture of the screen cloth of vibratory screening apparatus 9, screen out the middle fine sand (0.075mm < particle diameter < 1.18mm) meeting recycling requirement, the middle fine sand washed out after testing analysis heavy metal meet related resourceization utilize require, directly transport outward recycling; As fine sand in washing out after testing analysis heavy metal exceed standard, the stable pharmaceutical solution (as sequestrant, polysulfide etc.) adopting the molten medicine device 18 of stablizer to prepare carries out chemical leaching to bed mud, by the concentration of adjustment stable pharmaceutical solution, guarantee that the middle fine sand of eccysis meets relevant criterion requirement.
(6) mud under vibratory screening apparatus 9 sieve is delivered to hydrocyclone 10 through lift pump, screen out the thick mud (0.020mm < particle diameter < 0.075mm) meeting recycling requirement, the thick mud screened out after testing analysis heavy metal meet related resourceization utilize require, directly transport outward recycling.
(7) mud after hydrocyclone 10 processes enters mud concentration basin 11, carry out mud-water separation, supernatant liquor containing stable pharmaceutical and a small amount of heavy metal enters tail water chemical reaction pond 15 and chemical precipitation process is carried out in tail water chemical precipitation pond 16, qualified discharge after tail water after process satisfied discharge water body standard-required, the bed mud that concentration is higher enters mud conditioner 12, in sludge conditioning pond 12, add flocculation agent by the molten medicine device 17 of flocculation agent, mud is nursed one's health.
(8) bed mud of mud conditioner 12 is delivered to mechanical dewatering equipment 13 through lift pump and is carried out mechanical dehydration, and as the bed mud after dehydration can meet the standard-required in corresponding ultimate disposal place, directly outer running is rationally disposed; As the bed mud after dehydration directly can not meet the standard-required in corresponding ultimate disposal place, then control dehydration equipment operation condition, make bed mud water ratio meet the requirement of follow-up stable curing whipping device.
(9) the stable pharmaceutical solution that the bed mud after dehydration is prepared through stable curing whipping device 14 and the molten medicine device of stablizer 18 carries out abundant mix and blend reaction, by the concentration of adjustment stable pharmaceutical solution, guarantee that the bed mud indices after stable curing process meets the standard-required in corresponding ultimate disposal place.
(10) bed mud after stable curing process is transported to outside closed bed mud transport trolley specifies ultimate disposal place to do rationally to dispose.
Claims (2)
1. a river heavy metal polluted bed mud dystopy administering method, is characterized in that, comprise the following steps:
(1) bed mud dug out is transported on the bank, adopt river drip washing, the particle diameter washed out is greater than to cobble and the rubble detection analysis heavy metal content of 4.75mm, heavy metal content meets building materials use standard, direct outward transport recycling, if heavy metal content exceeds standard, then by leacheate, chemical leaching is carried out to bed mud; Carrying out washed-out sand process to the bed mud after drip washing, is that the coarse sand of 1.18mm ~ 4.75mm adopts river drip washing to carry out eccysis by wherein particle diameter; Modifier treatment is carried out to the bed mud containing leacheate;
(2) mud-water separation is carried out to the bed mud after modifier treatment, supernatant liquor containing leacheate is processed, leacheate after process meets recycling of service requirements, can not service requirements be met but the direct discharge of discharging water body requirement can be met, service requirements can not be met and can not meet again discharge water body requirement, carry out precipitation and recycle;
(3) sieve the mud after mud-water separation, screen out the middle fine sand that particle diameter is 0.075mm ~ 1.18mm, middle fine sand is analysis heavy metal content after testing, meets recycling requirement, directly transport outward recycling; As middle fine sand analysis heavy metal content overproof after testing, by stablizer, chemical leaching is carried out to bed mud;
(4) mud under sieve screens out by hydrocyclone the thick mud that particle diameter is 0.020mm ~ 0.075mm, the thick mud screened out analysis heavy metal content after testing, meets recycling requirement, directly transports outward recycling;
(5) mud after hydrocyclone process carries out mud-water separation, supernatant liquor containing stablizer and heavy metal carries out chemical precipitation process, qualified discharge after tail water after process satisfied discharge water body standard-required, the bed mud that concentration is higher is nursed one's health by flocculation agent;
(6) mud after conditioning dewaters, and as the bed mud after dehydration meets the standard-required in ultimate disposal place, directly outer running is rationally disposed; As the bed mud after dehydration directly can not meet the standard-required in ultimate disposal place, then make bed mud water ratio meet follow-up stable curing and stir requirement;
(7) bed mud after dehydration and stabiliser solution carry out abundant mix and blend reaction, and carry out stable curing process, the bed mud after stable curing process should meet the standard-required in ultimate disposal place.
2. a river heavy metal polluted bed mud dystopy governing system, it is characterized in that, comprise roller-type stone washing machine, collection mud sump, screw sand washer, the molten medicine device of leacheate, mud mixes modified pond, mud settling sump, ring waste reaction tank, leacheate precipitation pond for recovering, vibratory screening apparatus, hydrocyclone, mud concentration basin, mud conditioner, mechanical dewatering equipment, stable curing whipping device, tail water chemical reaction pond, tail water chemical precipitation pond, the molten medicine device of flocculation agent and the molten medicine device of stablizer; All molten with the leacheate medicine device of roller-type stone washing machine and screw sand washer is connected; Roller-type stone washing machine is connected with collection mud sump, collection mud sump is connected with screw sand washer by the lift pump set within it, screw sand washer, mud mix modified pond, mud settling sump, ring waste reaction tank and leacheate precipitation pond for recovering be connected successively, mud settling sump is connected with vibratory screening apparatus by the lift pump set within it, vibratory screening apparatus is connected with hydrocyclone by lift pump, and hydrocyclone, mud concentration basin, mud conditioner, mechanical dewatering equipment are connected successively with stable curing whipping device; Mud concentration basin, tail water chemical reaction pond are connected successively with tail water chemical precipitation pond; The molten medicine device of stablizer is connected with vibratory screening apparatus; The molten medicine device of flocculation agent is connected with sludge conditioning pond.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618281A (en) * | 2016-01-25 | 2016-06-01 | 中山大学 | Sorting method and device for contaminated soil particles with different particle sizes |
| CN106045257A (en) * | 2016-08-11 | 2016-10-26 | 上海洗霸科技股份有限公司 | Sediment combination treatment technology |
| CN106186639A (en) * | 2016-08-16 | 2016-12-07 | 中电建水环境治理技术有限公司 | Lake, river is gushed polluted bed mud and is processed remaining soil regenerative system |
| CN107098555A (en) * | 2017-06-21 | 2017-08-29 | 陕西欧菲德环保科技有限公司 | The processing unit and its processing method of a kind of greasy dirt |
| CN107285584A (en) * | 2017-08-17 | 2017-10-24 | 山东省环科院环境工程有限公司 | A kind of ephemeral stream heavy metal polluted bed mud elution processing method and system |
| CN107892452A (en) * | 2017-11-23 | 2018-04-10 | 杭州佰牛科技有限公司 | A kind of engineering construction is dehydrated collection device with sandstone |
| CN108218181A (en) * | 2018-02-13 | 2018-06-29 | 沈阳环境科学研究院 | A kind of river and lake pool gushes bed mud deep-graded processing system and method |
| CN109467292A (en) * | 2018-11-20 | 2019-03-15 | 大连德联科技有限公司 | One kind containing heavy metal and the biggish riverway sludge prosthetic device of silt content |
| CN110255840A (en) * | 2019-07-19 | 2019-09-20 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | A kind of novel water course/lake sludge curing system and sludge curing method |
| CN111499138A (en) * | 2020-05-14 | 2020-08-07 | 广东华泱技术有限公司 | Recycling treatment method for river sludge |
| CN111499136A (en) * | 2020-05-14 | 2020-08-07 | 广东华泱技术有限公司 | Innocent treatment method for river and lake sludge |
| CN112979113A (en) * | 2021-02-08 | 2021-06-18 | 中交 (天津) 生态环保设计研究院有限公司 | River and lake heavy metal polluted bottom mud electrically-assisted leaching restoration and reduction device and method |
| CN113683274A (en) * | 2021-08-03 | 2021-11-23 | 山东省环境保护科学研究设计院有限公司 | System and method for ex-situ treatment of sludge in urban pipe gallery |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618281A (en) * | 2016-01-25 | 2016-06-01 | 中山大学 | Sorting method and device for contaminated soil particles with different particle sizes |
| CN106045257A (en) * | 2016-08-11 | 2016-10-26 | 上海洗霸科技股份有限公司 | Sediment combination treatment technology |
| CN106045257B (en) * | 2016-08-11 | 2019-05-21 | 上海洗霸科技股份有限公司 | Bed mud combined treatment process |
| CN106186639A (en) * | 2016-08-16 | 2016-12-07 | 中电建水环境治理技术有限公司 | Lake, river is gushed polluted bed mud and is processed remaining soil regenerative system |
| WO2018032831A1 (en) * | 2016-08-16 | 2018-02-22 | 中电建水环境治理技术有限公司 | Residual soil regeneration processing system for contaminated bottom mud in rivers and lakes |
| CN107098555A (en) * | 2017-06-21 | 2017-08-29 | 陕西欧菲德环保科技有限公司 | The processing unit and its processing method of a kind of greasy dirt |
| CN107285584A (en) * | 2017-08-17 | 2017-10-24 | 山东省环科院环境工程有限公司 | A kind of ephemeral stream heavy metal polluted bed mud elution processing method and system |
| CN107892452B (en) * | 2017-11-23 | 2020-05-19 | 广州番禺职业技术学院 | Gravel and sand dehydration collection device for engineering building |
| CN107892452A (en) * | 2017-11-23 | 2018-04-10 | 杭州佰牛科技有限公司 | A kind of engineering construction is dehydrated collection device with sandstone |
| CN108218181A (en) * | 2018-02-13 | 2018-06-29 | 沈阳环境科学研究院 | A kind of river and lake pool gushes bed mud deep-graded processing system and method |
| CN109467292A (en) * | 2018-11-20 | 2019-03-15 | 大连德联科技有限公司 | One kind containing heavy metal and the biggish riverway sludge prosthetic device of silt content |
| CN110255840A (en) * | 2019-07-19 | 2019-09-20 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | A kind of novel water course/lake sludge curing system and sludge curing method |
| CN111499138A (en) * | 2020-05-14 | 2020-08-07 | 广东华泱技术有限公司 | Recycling treatment method for river sludge |
| CN111499136A (en) * | 2020-05-14 | 2020-08-07 | 广东华泱技术有限公司 | Innocent treatment method for river and lake sludge |
| CN112979113A (en) * | 2021-02-08 | 2021-06-18 | 中交 (天津) 生态环保设计研究院有限公司 | River and lake heavy metal polluted bottom mud electrically-assisted leaching restoration and reduction device and method |
| CN112979113B (en) * | 2021-02-08 | 2022-08-16 | 中交（天津）生态环保设计研究院有限公司 | River and lake heavy metal polluted bottom mud electrically-assisted leaching restoration and reduction device and method |
| CN113683274A (en) * | 2021-08-03 | 2021-11-23 | 山东省环境保护科学研究设计院有限公司 | System and method for ex-situ treatment of sludge in urban pipe gallery |
| WO2023010616A1 (en) * | 2021-08-03 | 2023-02-09 | 山东省环境保护科学研究设计院有限公司 | System and method for ex-situ treatment of urban pipe gallery sludge |
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Application publication date: 20150729 |