CN102786195B - Method for synchronously treating hydrocotyle verticillata and dewatered sludge by utilizing Peace-II earthworms - Google Patents
Method for synchronously treating hydrocotyle verticillata and dewatered sludge by utilizing Peace-II earthworms Download PDFInfo
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- CN102786195B CN102786195B CN2012102733968A CN201210273396A CN102786195B CN 102786195 B CN102786195 B CN 102786195B CN 2012102733968 A CN2012102733968 A CN 2012102733968A CN 201210273396 A CN201210273396 A CN 201210273396A CN 102786195 B CN102786195 B CN 102786195B
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Abstract
The invention relates to waste treatment techniques and aims to provide a method for synchronously treating hydrocotyle verticillata and dewatered sludge by utilizing Peace-II earthworms. The method comprises the steps as follows: a breeding bed is prepared; the Peace-II earthworms are introduced, and the introduction is successful if dense earthworms act forty days later; and the hydrocotyle verticillata and the dewatered sludge are treated, that is, the dewatered sludge and the crushed hydrocotyle verticillata are fully mixed in the volume ratio of 7:3 and then are spread on the breeding bed, and the mixture is treated completely when the surface layer of the mixture is covered with granular wormcast. The method has the advantages that the process is simple, the treatment effect on the mixture is good, the efficiency is high, the investment and the operation cost are low, the management is convenient, the application prospect of treatment products is wide, and the low carbon and environmental protection effects are embodied.
Description
Technical field
The present invention relates to the solid waste technical field, belong to biological treatment plant and solid waste, particularly a kind of method of utilizing peaceful No. two earthworms synchronously to process round coin grass and dewatered sludge.
Background technology
Be accompanied by the development of science and technology and the progress of national economy, water body health has caused social increasing concern, pollutes by industrial or agricultural and human lives the water safety that the body eutrophication that causes has badly influenced people.Organize national six large watershed water pollution situation sample investigation results to show according to Ministry of Water Resources, 90% above municipal water is seriously polluted; The whole nation accounts for 40% of whole nation monitoring water body because of the impotable surface water of pollution; Flow through in the section in city, 78% is not suitable for as the drinking water source; 50% underground water is contaminated; 64% people is using underproof water source.Therefore, the water pollution is the major reason that causes most urban water shortages.And by the tail water of the Sewage Plant of national qualified discharge, not carrying out advanced treating, directly to enter surface water be also one of water pollution root.So the sewage treatment plant tail water advanced treating is the only way that solves the receiving water body eutrophication.Along with the progress of water body treating theory, sewage treatment plant also progressively covers the rural area by cities and towns, in pollution control of water, plays an important role in the alleviation body eutrophication.Utilize the ecological wetland engineering to repair water body with low cost because of it, purifying water effect significantly had been widely used in recent years.Now, all adopted in many Designing Sewage Treatment Plants and utilize the ecological wetland technology to carry out Tailwater Depth to process this module.But the ecological wetland technology will produce a large amount of straws in repairing, if untimely gathering will be caused serious harm to environment equally.
Circle coin grass has become plant variety commonly used in view and water ecology reparation, but its growth is restive, often because spreading unchecked, excessive multiplication affects water landscape in the water body recovery technique, affect the growth of other water plants, simultaneously, the round coin of excessive breeding grass is dead laggardly enters water body and also easily water quality is produced certain impact.Under existing technology, mainly justify the coin grass by salvaging, simply the method for stacking or landfill is processed it, but the easy like this secondary pollution that causes environment is also the significant wastage to these affluent resources.
The subsequent treatment of sewage treatment plant's dewatered sludge is focus and the difficult point of studying both at home and abroad at present, under existing technical conditions, the main landfill that adopts, burning or agricultural method are processed it, but these processing modes all exist many deficiencies, need a large amount of soils as landfill, burn cost too high, agricultural sludge easily causes agricultural product security risk etc., is unfavorable for the sustainable development of ecotope.Along with the progress of ecological management theory, many sewage treatment plants of present stage have combination to utilize the ecological wetland technology to carry out the flow process that Tailwater Depth is processed, but seldom have research that the mode of wetland plant and Treatment of Sludge is combined.
Summary of the invention
The technical problem to be solved in the present invention is: overcome existing tail water and purify a difficult problem of justifying coin grass and sewage treatment plant's dewatered sludge subsequent treatment in wetland, a kind of method of utilizing peaceful No. two earthworms synchronously to process round coin grass and dewatered sludge mixture is provided, thereby realizes the recycling to discarded object in the waste water treatment subsequent technique.
Be the technical solution problem, technical scheme of the present invention is:
(1) culturing bed is prepared
The place mat height be the dewatered sludge of 15cm as culturing bed, the pH that regulates culturing bed with quicklime is 6.5; Take 15 centimetres wide as the interval to the culturing bed ridging, the ridge is high 10 centimetres, with the input position of the furrow between two ridges as peaceful No. two earthworms; Culturing bed was placed three days under nature, and excessive moisture is oozed out;
(2) introduce a fine variety peaceful No. two earthworms
After culturing bed is placed to three days, No. two earthworms of peace are introduced a fine variety in described furrow, the amount of introducing a fine variety is 0.5～1 kilogram/square meter; Added respectively primary sludge in the 15th day and the 25th day after introducing a fine variety, addition is that each 5cm is thick; Introduce a fine variety and push top layer mud observation after 40 days aside, have intensive earthworm movement to show peaceful No. two successful introduction, can carry out follow-up processing;
(3) justify the processing of coin grass and dewatered sludge
Round coin grass after dewatered sludge and pulverizing was overlying on culturing bed after the abundant mixing of volume ratio with 7: 3, and thickness is take culturing bed+mixture whole height as 25cm; Keep mixture moistening in processing procedure, suitable water spray of knot tying occurs as the mixture surface; When the mixture top layer is covered by the graininess wormcast, show that mixture processed fully.
In the present invention, comprise that also trimestral earthworm excrement separates after mixture process: the earthworm excrement should according to the characteristics of earthworm photophobism, make earthworm enter deep layer with strong illumination when separating; Then the earthworm excrement after processing with scraper plate scrape from the top layer from, the collection thickness of each earthworm excrement is no more than 10 centimetres.
In the present invention, described culturing bed is arranged in green house, and the green house surrounding is arranged the drain ditch, draining furrow width 10cm, dark 25cm; In green house, temperature is controlled at 15～30
oC, humidity remains on 50%.
In the present invention, the water content of described dewatered sludge is less than 85%.
In the present invention, the round coin grass size after described pulverizing is less than 2cm.
Beneficial effect of the present invention is:
This method technique is simple, and is effective to mixture process, and efficient is high, and the investment operating cost is low, and convenient management is processed product and had a extensive future, and is embodying the characteristics such as low-carbon environment-friendly.Adopt the method that circle coin grass is processed with the dewatered sludge mixture, the effective poisonous and harmful element in degradation of mixture, be biological organic fertilizer or seedling matrix material with the organic matter transformation of high-load in mixture, thereby solve the difficult problem of wetland crop and the follow-up conversion of dewatered sludge.The method can reach 4 kilograms/square meter/sky to the handling rate of mixture, booth take 0.07 hectare as construction criteria, year is processed mixture can be over 950 tons, earthworm excrement after treatment is as the biological organic fertilizer raw material, and its physicochemical character meets " biological organic fertilizer " People's Republic of China (PRC) agricultural industry criteria (NY525-2011) fully.
Description of drawings
Fig. 1 is the greenhouse structure schematic diagram;
Fig. 2 is for processing rear mixture with reaction time degraded situation variation diagram;
Fig. 3 is peaceful No. two earthworm number change situation maps after processing.
Wherein, in Fig. 1, Reference numeral is:
1 green house, 2 sample introduction imports, 3 drainage pipelines, 4 operating walk ways, 5 pending raw materials, 6 peaceful No. two earthworms, 7 thermometers, 8 ventilating openings.
Embodiment
Thinking of the present invention is:
In conjunction with the circle coin residual body of grass and the synchronous difficult problem of processing of two kinds of discarded objects of dewatered sludge, utilize peaceful No. two powerful engulfing with capacity of decomposition of earthworm to be translated into the nutriment of self and high-quality wormcast.Its objective is prolific rehabilitation plant and dewatered sludge in efficient processing ecological wetland, the difficult problem of plant subsequent treatment and Treatment of Sludge in solution deep purification of tail water engineering.This invention is in conjunction with the maintenance technology of wetland in the tail water engineering, from environmental pollution improvement's angle, can be with straw, dewatered sludge is converted into high-quality biological organic fertilizer raw material, avoid rehabilitation plant and dewatered sludge possibility pollution on the environment, also had certain economic worth.
The present invention mainly comprises: 1, build booth; 2, introduce a fine variety peaceful No. two earthworms; 3, justify the processing of coin grass and dewatered sludge; 4, control treatment conditions; 5, the earthworm excrement separates; 6, daily management.
The present invention is achieved in that
(1) build booth
Treatment effeciency with reference to 4 kilograms/square meter/sky, choose a draining unobstructed plot and build booth near restoration of the ecosystem wetland or sewage treatment plant, the booth specification should according to the mud discharge capacity of Sewage Plant every day and circle coin grass day by day treating capacity design, keep the booth inner air flow, temperature is suitable, and draining is unobstructed.
The place mat height be the dewatered sludge of 15cm as culturing bed, the pH that regulates culturing bed with quicklime is 6.5; Take 15 centimetres wide as the interval to the culturing bed ridging, the ridge is high 10 centimetres, with the input position of the furrow between two ridges as peaceful No. two earthworms; Culturing bed was placed three days under nature, and excessive moisture is oozed out.
(2) introduce a fine variety
Need introduce a fine variety before processing, No. two earthworms of peace are introduced a fine variety on culturing bed.After introducing a fine variety, the 15th, the 25 day appropriate primary sludge of adding, introduce a fine variety and push top layer mud observation after 40 days aside, has intensive earthworm movement to show peaceful No. two successful introduction, can carry out the processing to mixture.
(3) mixture process
Choose smooth plot and pulverize circle coin grass, the round coin grass after dewatered sludge and pulverizing is fully mixed with 7: 3 volume ratios, mixture after mixing is overlying on culturing bed, thickness reaches 25cm with culturing bed+mixture whole height and is advisable.Keep mixture moistening, when the dry knot tying of mixture surface appearance, suitably spray water.
Filling: process after 20 days, the mixture reduction is obvious, when the mixture top layer is covered by the graininess wormcast, can carry out next batch and add sample and process, so repeatedly.
(4) the earthworm excrement separates
After three months, need carry out the earthworm excrement and separate.Step is: make earthworm enter deep layer according to the characteristics of earthworm photophobism with strong illumination, this moment the earthworm excrement after processing with scraper plate from the top layer to deep layer scrape from, cycling separates with earthworm the earthworm excrement, and the collection of each earthworm excrement is no more than 10 centimetres with thickness and is advisable.
The below illustrates the present invention.
Build the biological respinse booth
Choose draining unobstructed, booth is set up in the plot of suitable size, and booth designs as shown in Figure 1, the middle wide operating walk way of 1m that keeps, and the drain ditch of the wide 15cm of surrounding excavation, dark 25cm keeps the booth inner air flow, temperature 15～30
oC。
Introduce a fine variety peaceful No. two
The dewatered sludge of the high 15cm of place mat is as culturing bed in booth, and the pH that regulates culturing bed with quicklime is 6.5; Take 15cm as the interval ridging, approximately 10 centimetres of ridge height, culturing bed are placed three days to guarantee that its excessive moisture oozes out with the drain ditch on culturing bed, after three days, peace are introduced a fine variety between furrow for No. two, and the amount of introducing a fine variety is advisable for peaceful No. two with every square meter 0.5～1kg.Observed 0.5 hour in booth after introducing a fine variety, can stop observing after earthworm all pierces culturing bed, added respectively primary sludge in the 15th day, the 25th day after introducing a fine variety, addition covers top layer 5cm at every turn and is advisable.Introduce a fine variety and push the top layer observation after 40 days aside, have intensive earthworm movement to show peaceful No. two successful introduction, can carry out the processing to mixture.
Raw material proportioning and sample introduction are regulated
Before processing, need pulverize circle coin grass, after guaranteeing to pulverize, every block length is no more than 2cm, after pulverizing, circle coin grass, can and be overlying on culturing bed after the mixture mixing with the abundant mixing of 3:7 volume ratio with dewatered sludge, and whole height is no more than 25cm and is advisable with mixture+culturing bed thickness.
Treatment conditions are controlled
Keep the booth inner air flow, water in good time, control greenhouse temperature 15～30
oC, humidity 50% left and right.
Process product separation
When stable operation after three months, can process product and peaceful No. two separate.Choosing illumination strong daytime during separation, will process from level to level product with flat board and scrape to operating walk way, is no longer granular wormcast until scrape layer, stops collecting.At this moment, can continue to add mixture processes.
Daily management
Daily management be mainly to guarantee that in booth, condition is fit to peaceful No. two growths, in time water the summer at excess Temperature, temperature too low winter is in insulations such as culturing bed surface coverage straw, prevent that culturing bed is too high or cross and peaceful No. two growths of low impact, in time results are processed product, prevent that predatory birds, insect etc. from entering booth and affecting the growth of peaceful No. two.
Embodiment 1
Adopt the synchronous careless indoor result with mud mixture of different proportion circle coin of processing to show, in cultivation cycle is the test of 20 days, to justify the coin grass: during mud=3:7 processes, the growing state of peaceful No. two earthworms is the best, its biologically active is the strongest, the biological growth amount is processed far above other ratio, and the transformation efficiency of mixture is the highest, has reached 91.6%, the product nutrient is comprehensive, is rich in organic matter and beneficial microbe colony.
Before and after processing, the variation of mixture physicochemical property and content of beary metal sees Table 1,2.
Mixture physicochemical property (g/kg) before and after table 1 is processed
Before and after table 2 is processed, the mixture content of beary metal changes (mg/kg)
| Time | Cr | As | Cd | Hg | Pb | Zn |
| Before processing (mixture) | 201.82 | 26.40 | 1.89 | 4.86 | 40.39 | 653.14 |
| After processing (earthworm excrement) | 143.51 | 14.26 | 1.67 | 1.86 | 35.88 | 267.58 |
| National standard | <150 | <15 | <3 | <2 | <50 | Nd |
In employing Tailwater Depth treatment process, as processing raw material, it is 20 days that raw material is processed the transformation period at every turn to rehabilitation plant circle coin grass with dewatered sludge.Result of the test through 9 trial runs at the beginning of the month shows: the method can significantly be converted into the fertilizer material with the nutriment in raw material, in the processing product, the NPK total content surpasses 5%, and the content of organic matter reaches 47.5%, can effectively remove poisonous and harmful substance in raw material, removal efficient to Cr, As, Cd, Hg, Pb, Zn has reached respectively 28.9%, 46.0%, 11.6%, 61.7%, 11.2% and 59.0%, peaceful No. two reproductive effects are good, and the reduction of raw material is reached more than 80%, and treatment effect is seen Fig. 2,3.
After the method is processed, the content of organic matter in raw material, total nitrogen content, content of tatal phosphorus, full potassium content, pH value, the indexs such as content of beary metal all satisfy " biological organic fertilizer " People's Republic of China (PRC) agricultural industry criteria (NY525-2011) requirement.
Claims (4)
1. a method of utilizing peaceful No. two earthworms synchronously to process round coin grass and dewatered sludge, is characterized in that, comprises the following steps:
(1) culturing bed is prepared
The place mat height be the dewatered sludge of 15cm as culturing bed, the pH that regulates culturing bed with quicklime is 6.5; Take 15 centimetres wide as the interval to the culturing bed ridging, the ridge is high 10 centimetres, with the input position of the furrow between two ridges as peaceful No. two earthworms; Culturing bed was placed three days under nature, and excessive moisture is oozed out;
Described culturing bed is arranged in green house, and the green house surrounding is arranged the drain ditch, draining furrow width 10cm, dark 25cm; In green house, temperature is controlled at 15～30
oC, humidity remains on 50%;
(2) introduce a fine variety peaceful No. two earthworms
After culturing bed is placed to three days, No. two earthworms of peace are introduced a fine variety in described furrow, the amount of introducing a fine variety is 0.5～1 kilogram/square meter; Added respectively primary sludge in the 15th day and the 25th day after introducing a fine variety, addition is that each 5cm is thick; Introduce a fine variety and push top layer mud observation after 40 days aside, have intensive earthworm movement to show peaceful No. two successful introduction, can carry out follow-up processing;
(3) justify the processing of coin grass and dewatered sludge
Round coin grass after dewatered sludge and pulverizing was overlying on culturing bed after the abundant mixing of volume ratio with 7: 3, and thickness is take culturing bed+mixture whole height as 25cm; Keep mixture moistening in processing procedure, suitable water spray of knot tying occurs as the mixture surface; When the mixture top layer is covered by the graininess wormcast, show that mixture processed fully.
2. method according to claim 1, also comprise mixture process after trimestral earthworm excrement separate: the earthworm excrement should according to the characteristics of earthworm photophobism, make earthworm enter deep layer with strong illumination when separating; Then the earthworm excrement after processing with scraper plate scrape from the top layer from, the collection thickness of each earthworm excrement is no more than 10 centimetres.
3. method according to claim 1, is characterized in that, the water content of described dewatered sludge is less than 85%.
4. method according to claim 1, is characterized in that, the round coin grass size after described pulverizing is less than 2cm.
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| CN104430187A (en) * | 2014-06-12 | 2015-03-25 | 四川省环境保护科学研究院 | Method for treating sludge in vermiculture |
| CN106922625A (en) * | 2015-12-30 | 2017-07-07 | 扬大(常熟)现代农业发展研究院有限公司 | A kind of earthworm engineering bed technique and its application |
| CN106831021A (en) * | 2017-02-10 | 2017-06-13 | 王均猛 | A kind of method that harmless treatment is carried out to house refuse |
| CN107954582A (en) * | 2017-12-21 | 2018-04-24 | 南京师范大学 | A kind of compound temperature canopy ecological functions bed and it is utilized to carry out the method for mud decrement and Ecological Disposal |
| CN112551845A (en) * | 2020-12-21 | 2021-03-26 | 山东汇城环保科技有限公司 | Method for reducing weight and sterilizing sludge by using earthworms |
| CN113207617A (en) * | 2021-04-07 | 2021-08-06 | 浙江大学 | Method for synchronously treating saxifraga and river sediment by utilizing Taiping earthworms III |
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| KR100583080B1 (en) * | 2005-09-21 | 2006-05-25 | 강성환 | Multistage cage for earthworm-breeding and apparatus for processing organic sludge using the same |
| JP2007275782A (en) * | 2006-04-07 | 2007-10-25 | Matsushita Electric Ind Co Ltd | Sludge treatment apparatus |
| CN101412573A (en) * | 2008-11-15 | 2009-04-22 | 伏小勇 | Method for processing city life sludge by using angleworm |
| CN202232601U (en) * | 2011-09-27 | 2012-05-30 | 天津广聚源纸业有限公司 | Device for breeding earthworms by use of papermaking sludge |
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