CN115490406A - Controlled-release greening technical method for water-containing sludge of urban sewage treatment plant - Google Patents
Controlled-release greening technical method for water-containing sludge of urban sewage treatment plant Download PDFInfo
- Publication number
- CN115490406A CN115490406A CN202110669002.XA CN202110669002A CN115490406A CN 115490406 A CN115490406 A CN 115490406A CN 202110669002 A CN202110669002 A CN 202110669002A CN 115490406 A CN115490406 A CN 115490406A
- Authority
- CN
- China
- Prior art keywords
- sludge
- plant
- controlled
- release
- soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Cultivation Of Plants (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a controlled-release greening technical method for water-containing sludge of an urban sewage treatment plant, which comprises the steps of firstly arranging a compost box to carry out on-site sludge composting on the sludge; then, different controlled release processes are adopted for different types of sludge, heavy metal hyper-enrichment plants are selected as greening plants, and the heavy metals in the sludge are phytologically repaired to achieve the controlled release effect; then tracking soil detection monitoring, screening and setting detection factors according to different sludge types, and periodically monitoring the soil; finally, sludge disposal control measures are taken correspondingly according to the monitoring and early warning instructions; the compost box is 2-6 meters long, 2-3 meters wide and 1.2-1.5 meters high, the periphery is isolated by using waste wood boards, meanwhile, the bottom is covered with geotextile, and a PE film is covered on the bottom. The invention adopts the controlled-release greening technology to carry out on-site composting and adopts the planted heavy metal super-enriched plants to carry out controlled-release greening, thereby realizing landscaping resource utilization of sludge and monitoring the stability and removal of substandard substances in the resource process.
Description
Technical Field
The invention relates to the technical field of treatment of water-containing sludge, in particular to a technical method for greening the controlled release of the water-containing sludge of an urban sewage treatment plant.
Background
The water-containing sludge (called sludge for short) of the sewage treatment plant is a byproduct of the sewage treatment process of the sewage treatment plant, is rich in organic matters and nutrient elements, and can also contain a large amount of viruses, worm eggs, heavy metals and organic pollutants. In recent years, with the rapid development of urban economy and the continuous rise of urban modernization level, urban population is rapidly increased, water consumption is increased, wastewater discharge is increased year after year, urban sewage treatment plants are popularized, sewage treatment capacity is rapidly increased, meanwhile, china pays more attention to ecological environment protection, the requirement on effluent water quality standard of the sewage treatment plants is higher, the sludge yield of the urban sewage treatment plants is increased day by day due to a plurality of factors, and the estimated 2020-2025 year is that the annual production of urban sewage treatment sludge in China breaks through 6000 million (calculated by water content of 80%). The method has the advantages of high sludge water content, large quantity, wide range and complex components, increases the environmental risk of secondary pollution caused by stacking or dumping without effective treatment to natural environments such as soil, underground water and the like, and urgently solves the problems of unreasonable occupation of soil space, high sludge treatment cost, infeasible economy and the like caused by sludge stacking. Therefore, the effective treatment and resource utilization technology of the sludge in the urban sewage treatment plant is deeply researched, and the sludge in the urban sewage treatment plant is scientifically and reasonably consumed, so that the purposes of resource utilization, stabilization and harmlessness are urgent.
The controlled release greening technology for the sludge is a research that the controlled release technology for heavy metal and organic matters in the sludge is combined with the sludge treatment technology and the landscaping technology, ordered release of pollutants is controlled through targeted experiments and design, and greening plants are reasonably matched and designed to achieve safe and resource-oriented effective utilization of the sludge.
Based on the technical scheme, the invention designs a technical method for controlled release greening of the water-containing sludge of the municipal sewage treatment plant, so as to solve the problems.
Disclosure of Invention
The invention aims to provide a controlled-release greening technical method for the water-containing sludge of an urban sewage treatment plant, which aims to solve the problems that the sludge provided by the background technology has high water content, large quantity and wide range of components, is complex in composition, increases the environmental risk of secondary pollution to natural environments such as soil, underground water and the like caused by stacking or dumping without effective treatment, unreasonably occupies the space of the national soil caused by sludge stacking, has high sludge treatment cost and is not economically feasible, and how to scientifically and reasonably consume the sludge for urban sewage treatment, so that the sludge is urgently recycled, stabilized and harmless.
In order to achieve the purpose, the invention provides the following technical scheme: a controlled release greening technical method for water-containing sludge of an urban sewage treatment plant comprises the following steps:
the first step is as follows: arranging a compost box to carry out on-site sludge composting on the sludge;
the second step: different controlled release processes are adopted for different types of sludge, heavy metal hyper-enrichment plants are selected as greening plants, and the heavy metals in the sludge are phytologically repaired to achieve the controlled release effect;
the third step: tracking soil detection monitoring, screening and setting detection factors according to different sludge types, and periodically monitoring the soil;
the fourth step: according to monitoring and early warning indication, sludge disposal control measures are correspondingly made, and the method mainly comprises three steps: (1) The soil meets the mud standard for landscaping and is returned to the soil directly on site; (2) The risk of continuous treatment can be eliminated if the standard is not met, and the controlled release use in situ is continued; (3) And if the requirements of corresponding standards cannot be met, the remote final disposal is carried out.
As a further scheme of the invention, the compost bin in the first step is 2-6 meters long, 2-3 meters wide and 1.2-1.5 meters high, and is isolated by using waste wood boards at the periphery, and simultaneously, the bottom is covered with geotextile and a PE film is covered if necessary.
As a further scheme of the invention, the controlled release process in the second step is to add a biological agent for industrial sludge and adopt a bottom controlled release technology for domestic sewage sludge.
As a further scheme of the present invention, the phytoremediation technology described in the second step mainly includes four aspects: a. the plant is fixed, the heavy metal is adsorbed on the surface of the soil by accumulating and precipitating at the root or passivating the heavy metal through the root system, in addition, mucilaginous substances secreted by the root system can be competitively combined with metal ions, so that the mucilaginous substances precipitate outside the plant root, and the mobility of the heavy metal in the soil is also influenced; b. plant extraction, which mainly utilizes the absorption effect of hyper-enriched plants to transfer metal elements to the overground part of the plants for accumulation, and then the overground part is harvested to reduce the heavy metal content in the soil; c. plant volatilization, which is a method for removing part of volatile pollutants in the environment by using plants, namely, the pollutants are absorbed in the body by the plants and then are converted into gaseous substances to be released into the atmosphere, and the toxicity of the converted substances is required to be less than that of the pollutants before conversion by the plant volatilization so as to reduce the environmental hazard; d. root system filtration is a process of filtering heavy metals by utilizing the absorption or adsorption function of plant root systems, and is suitable for the situation that plant extraction technology cannot be applied, namely, plants cannot transfer heavy metals from roots to overground parts.
As a further aspect of the present invention, the detection period of said periodic soil monitoring in the third step may be once per month, quarterly, semiannually or annually, depending on the pollutant and its state.
Compared with the prior art, the invention has the following beneficial effects:
the technical method for the controlled release greening of the water-containing sludge of the sewage treatment plant adopts the controlled release greening technology to carry out on-site composting, and by arranging the composting box, the transportation cost is saved, the contact between the sludge and the soil is isolated, the soil is prevented from being polluted by the sludge, and in order to prevent heavy metals from threatening the human health through a food chain, ornamental plants such as heavy metal hyper-enriched plants and the like are planted by the sludge; the technology of applying the sludge to landscaping is discussed through multi-aspect analysis, and a new technology in a sludge resource utilization mode is sought. The controlled-release greening technology can realize landscaping resource utilization of sludge and monitor the stability and removal of substandard substances in the resource process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the principle flow of the controlled release greening method for the water-containing sludge of the municipal sewage treatment plant according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a technical method for greening the water-containing sludge controlled release of an urban sewage treatment plant comprises the following steps:
the first step is as follows: arranging a compost box to carry out on-site sludge composting on the sludge;
the second step: different controlled release processes are adopted for different types of sludge, heavy metal hyper-enrichment plants are selected as greening plants, and plant restoration is carried out on heavy metals in the sludge to achieve the controlled release effect;
the third step: tracking soil detection monitoring, screening and setting detection factors according to different sludge types, and regularly monitoring the soil;
the fourth step: according to monitoring and early warning indication, sludge disposal control measures are correspondingly made, and the method mainly comprises three steps: (1) The quality standard of the mud for landscaping is met, and the soil is returned on the spot; (2) The risk of continuous treatment can be eliminated if the standard is not met, and the controlled release use in situ is continued; (3) And if the standard requirements cannot be met, the treatment is finally carried out in different places.
Specifically, the compost bin in the first step is 2-6 meters long, 2-3 meters wide and 1.2-1.5 meters high, and is isolated by waste wood boards at the periphery, and meanwhile, the bottom is covered with geotextile, and a PE film is covered if necessary.
Specifically, the controlled release process in the second step is to add a biological agent aiming at industrial sludge and adopt a bottom controlled release technology aiming at domestic sewage sludge; the industrial sludge has high heavy metal content, complex components and strong toxicity, a large amount of auxiliary materials and biological agents need to be added, the domestic sludge has high organic matter content and low heavy metal content, the auxiliary materials are added in a low proportion, and the bottom of the domestic sludge needs to be controlled to release.
Specifically, the phytoremediation technology described in the second step mainly includes four aspects: a. the plant is fixed, the heavy metal is adsorbed on the surface of the soil by accumulating and precipitating at the root or passivating the heavy metal through the root system, in addition, the mucilaginous substance secreted by the root system can be competitively combined with the metal ions, so that the mucilaginous substance is precipitated outside the plant root, and the migration of the heavy metal in the soil is also influenced; b. plant extraction, which mainly utilizes the absorption effect of hyper-enriched plants to transfer metal elements to the overground part of the plants for accumulation, and then the overground part is harvested to reduce the heavy metal content in the soil; c. plant volatilization, which is a method for removing part of volatile pollutants in the environment by using plants, namely, the pollutants are absorbed in the body by the plants and then are converted into gaseous substances to be released into the atmosphere, and the toxicity of the converted substances is required to be less than that of the pollutants before conversion by the plant volatilization so as to reduce the environmental hazard; d. root system filtration is a process of filtering heavy metals by utilizing the absorption or adsorption function of plant root systems, and is suitable for the situation that plant extraction technology cannot be applied, namely, plants cannot transfer heavy metals from roots to overground parts.
Specifically, the detection period of the periodic soil monitoring in the third step is determined depending on the contaminants and their states, and may be monthly, quarterly, semiannually, or yearly.
In practical application, the controlled release greening technical method prevents heavy metals in the sludge from rapidly entering soil by placing the treated sludge in a closed or semi-closed device, and simultaneously reduces the heavy metals in the sludge by planting heavy metal super-enrichment plants on the surface of the sludge, firstly, the amount of the heavy metals is reduced by plant absorption, and secondly, the heavy metals cannot immediately enter the soil by plant fixation, so that the purpose of effective controlled release is achieved. In addition, after the sludge reaches the mud quality standard for landscaping, the sludge returned to the soil on site can still adopt a plant restoration technology to continuously plant landscaping plants with super-enriched heavy metals, so that the effective control of the heavy metals in the soil is ensured.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. A technical method for greening the water-containing sludge controlled release of an urban sewage treatment plant is characterized by comprising the following steps:
the first step is as follows: arranging a compost box to carry out on-site sludge composting on the sludge;
the second step: different controlled release processes are adopted for different types of sludge, heavy metal hyper-enrichment plants are selected as greening plants, and plant restoration is carried out on heavy metals in the sludge to achieve the controlled release effect;
the third step: tracking soil detection monitoring, screening and setting detection factors according to different sludge types, and periodically monitoring the soil;
the fourth step: according to monitoring and early warning indication, sludge disposal control measures are correspondingly made, and the method mainly comprises three steps: (1) The soil quality standard for landscaping is met, and the soil is returned on the spot; (2) The risk of continuous treatment can be eliminated if the standard is not met, and the controlled release use in situ is continued; (3) And if the standard requirements cannot be met, the treatment is finally carried out in different places.
2. The controlled release greening technique for the hydrous sludge of the municipal sewage treatment plant according to claim 1, wherein in the first step, the compost bin is 2-6 m long, 2-3 m wide and 1.2-1.5 m high, and is isolated by waste wood boards, and simultaneously, the bottom is covered with geotextile and the top is covered with PE film.
3. The controlled-release greening technical method for the hydrous sludge of the urban sewage treatment plant as claimed in claim 1, wherein the controlled-release technology in the second step is to add a biological agent to the industrial sludge and adopt a bottom controlled-release technology to the domestic sewage sludge.
4. The method for controlled release greening of the hydrous sludge of the municipal sewage treatment plant according to claim 1, wherein the phytoremediation technology in the second step mainly comprises four aspects: a. the plant is fixed, the heavy metal is adsorbed on the surface of the soil by accumulating and precipitating at the root or passivating the heavy metal through the root system, in addition, the mucilaginous substance secreted by the root system can be competitively combined with the metal ions, so that the mucilaginous substance is precipitated outside the plant root, and the migration of the heavy metal in the soil is also influenced; b. plant extraction, which is mainly to transport metal elements to the overground part of a plant for accumulation by utilizing the absorption effect of hyper-enriched plants and then to reduce the content of heavy metals in soil by harvesting the overground part; c. plant volatilization, which is a method for removing part of volatile pollutants in the environment by using plants, namely, the pollutants are absorbed in the body by the plants and then are converted into gaseous substances to be released into the atmosphere, and the toxicity of the converted substances is required to be less than that of the pollutants before conversion by the plant volatilization so as to reduce the environmental hazard; d. root system filtration is a process of filtering heavy metals by utilizing the absorption or adsorption function of plant root systems, and is suitable for the situation that plant extraction technology cannot be applied, namely, plants cannot transfer heavy metals from roots to overground parts.
5. The controlled-release greening technique for the hydrous sludge of a municipal sewage treatment plant according to claim 1, wherein the detection period of the periodic soil monitoring in the third step is determined according to the pollutant and its status, and can be performed monthly, quarterly, semiannually or annually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669002.XA CN115490406A (en) | 2021-06-17 | 2021-06-17 | Controlled-release greening technical method for water-containing sludge of urban sewage treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669002.XA CN115490406A (en) | 2021-06-17 | 2021-06-17 | Controlled-release greening technical method for water-containing sludge of urban sewage treatment plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115490406A true CN115490406A (en) | 2022-12-20 |
Family
ID=84464697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110669002.XA Pending CN115490406A (en) | 2021-06-17 | 2021-06-17 | Controlled-release greening technical method for water-containing sludge of urban sewage treatment plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115490406A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153258A (en) * | 2010-12-02 | 2011-08-17 | 福建省农业科学院农业工程技术研究所 | Production technique for reducing content of heavy metals in municipal domestic sludge |
| CN109110925A (en) * | 2018-07-27 | 2019-01-01 | 山东省科学院海洋仪器仪表研究所 | A kind of method of polluted bed mud recycling |
| WO2019020209A1 (en) * | 2017-07-27 | 2019-01-31 | Igas Energy Gmbh | Fractioned separation of valuable substances from aqueous many-component mixtures |
| CN110788130A (en) * | 2019-11-18 | 2020-02-14 | 武汉科技大学 | Ecological restoration method for polluted soil in copper ore area |
| CN111302584A (en) * | 2020-04-23 | 2020-06-19 | 南昌鑫淼源环保有限公司 | Municipal sludge treatment system |
| CN112574794A (en) * | 2020-11-17 | 2021-03-30 | 珠海红塔仁恒包装股份有限公司 | Treatment method of papermaking sludge |
-
2021
- 2021-06-17 CN CN202110669002.XA patent/CN115490406A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153258A (en) * | 2010-12-02 | 2011-08-17 | 福建省农业科学院农业工程技术研究所 | Production technique for reducing content of heavy metals in municipal domestic sludge |
| WO2019020209A1 (en) * | 2017-07-27 | 2019-01-31 | Igas Energy Gmbh | Fractioned separation of valuable substances from aqueous many-component mixtures |
| CN109110925A (en) * | 2018-07-27 | 2019-01-01 | 山东省科学院海洋仪器仪表研究所 | A kind of method of polluted bed mud recycling |
| CN110788130A (en) * | 2019-11-18 | 2020-02-14 | 武汉科技大学 | Ecological restoration method for polluted soil in copper ore area |
| CN111302584A (en) * | 2020-04-23 | 2020-06-19 | 南昌鑫淼源环保有限公司 | Municipal sludge treatment system |
| CN112574794A (en) * | 2020-11-17 | 2021-03-30 | 珠海红塔仁恒包装股份有限公司 | Treatment method of papermaking sludge |
Non-Patent Citations (1)
| Title |
|---|
| 何连生: "外源有机酸和肥料对李氏禾富集铬的影响极其栽培生态环境研究", 北京中国环境出版社, pages: 127 - 129 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Shrestha et al. | Effects of different soil media, vegetation, and hydrologic treatments on nutrient and sediment removal in roadside bioretention systems | |
| Dassanayake et al. | A review on alum sludge reuse with special reference to agricultural applications and future challenges | |
| Suelee et al. | Phytoremediation potential of vetiver grass (Vetiveria zizanioides) for treatment of metal-contaminated water | |
| Read et al. | Variation among plant species in pollutant removal from stormwater in biofiltration systems | |
| Tam et al. | Accumulation and distribution of heavy metals in a simulated mangrove system treated with sewage | |
| Razali et al. | Effectiveness of a drinking-water treatment sludge in removing different phosphorus species from aqueous solution | |
| Christen et al. | Winery wastewater treatment using the land filter technique | |
| CN100595169C (en) | Ecological system for water purification and recover | |
| CN102603132A (en) | Sludge treatment device based on electrolysis and pressure filtration technologies and method thereof | |
| Knox et al. | Long-term performance of a constructed wetland for metal removal | |
| Martin et al. | Mitigation of landfill leachate incorporating in-series constructed wetlands of a closed-loop design | |
| Hu et al. | Purification of leachate from sludge treatment beds by subsurface flow constructed wetlands: effects of plants and hydraulic retention time | |
| Nelson et al. | Metal removal from water discharges by a constructed treatment wetland | |
| Zimmels et al. | Use of naturally growing aquatic plants for wastewater purification | |
| CN115490406A (en) | Controlled-release greening technical method for water-containing sludge of urban sewage treatment plant | |
| CN101941019A (en) | Method for removing chlordane and mirex in soil by utilizing ultrasonic wave/Fe | |
| Kuffour | Improving faecal sludge dewatering efficiency of unplanted drying bed | |
| Basílico et al. | Phytoremediation of water and wastewater: on-site and full-scale applications | |
| Ou et al. | A production-scale ecological engineering forest system for the treatment and reutilization of municipal wastewater in the Inner Mongolia, China | |
| Lenth et al. | Filterra bioretention systems: Technical basis for high flow rate treatment and evaluation of stormwater quality performance | |
| Nagara et al. | Green engineered mulch for phosphorus and metal removal from stormwater runoff in bioretention systems | |
| CN111362504A (en) | Groundwater purification recharge system | |
| Hirschman et al. | Performance enhancing devices for stormwater best management practices | |
| Dell et al. | Bioretention Media Mixtures–A Literature Review | |
| Pitaktunsakul et al. | Vertical-flow constructed wetlands in cooperating with oxidation ponds for high concentrated COD and BOD pig-slaughterhouse wastewater treatment system at Suphanburi-provincial municipality |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |