CN102010234B - Method for processing sludge in sewage treatment plant into fertilizer by earthworms - Google Patents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
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Abstract
The invention relates to a method for processing sludge in a sewage treatment plant into a fertilizer by earthworms, comprising the following steps: a, preparing an earthworm bed, wherein the basement layer of the earthworm bed is subjected to seepage-proofing treatment; b, inoculating earthworms on the earthworm bed; c, adding feeds on the earthworm bed after inoculation to form a feeding layer, wherein the feed adding mode is that sludge in the sewage treatment plant is added at first, organic matters the amount of which accounts for one tenth of the total sludge amount is added about 1 to 2 months later when the sludge is completely consumed by the earthworms, and feed adding is performed repeatedly after the organic matters are completely consumed; d, collecting the earthworms and wormcast after about 40 days; and e, adding a proper amount of nutrient elements based on the content of NPK in the wormcast to obtain a fertilizer product. The method provided by the invention has the advantages of less pollution, small occupied area, strong operability, relatively less cost, high sludge treatment efficiency, and capability of industrialized development.
Description
Technical field
The present invention relates to a kind of is the method for fertilizer with the dealing with earthworm sludge of sewage treatment plant.
Background technology
Sewage work produces a large amount of mud every day now, the mud of sewage work is to carry out the sedimentable matter that produces in the decontamination process and the scum silica frost on sewage surface at city domestic sewage and trade effluent, be a kind of solidliquid mixture, do not having under the External Force Acting, its solid-liquid ratio is relatively stable.According to the technique of sewage disposal, mud can be divided into primary deposition mud, humus sludge, remaining active sludge and digested sludge etc.Along with the quickening of Urbanization in China, treatment rate of domestic sewage improves year by year, and the sludge yield of municipal sewage plant also sharply increases.Behind the mud entered environment of suitably processing, bring secondary pollution directly can for water body and atmosphere, not only reduced the effective processing capacity of Sewage treatment systems, and ecotope and mankind's activity have been consisted of serious threat.It is estimated, the at present annual generation of China sludge quantity is 3,000,000 tons, and annual growth is greater than 10%, if domestic municipal effluent is all processed, then will produce approximately 8,400,000 tons in mud (dry weight) every year, account for 3.2% of China's solid waste total amount, even in Chinese Urbanization level higher several cities and area, the sludge treatment problem is also very outstanding.Existing method for sludge treatment is divided into several modes such as direct landfill, burning, soil utilization, compost and throwing sea.Progress along with science and technology, have gradually the method that mud is utilized to produce, the sanitary landfill of mud starts from the sixties in 20th century, and this method is on the basis of traditional landfill, through science addressing and necessary protective treatment, have strict management system, but owing to contain a large amount of viral things in the mud, in the situation that the seepage polluted underground water, simultaneously, because the increase of sewage load, the output of mud is also increasing, and suitable landfill place is also fewer and feweri.The sludge high temperature composting technology, its characteristics are: self produce certain heat, and high-temperature duration is long, do not need external heat source, can reach innoxious, make this material decomposition that is difficult to degrade of Mierocrystalline cellulose, make composting that the humify of higher degree arranged, improve available nutrient.But the compost time is long, and floor space is large, and operability is not strong, is conducive to disease and pest and grows.The soil utilization of mud mainly comprises agricultural sludge, is used for forest and gardening, discards the improvement of mining site etc.This method mainly is that the nutritive elements such as the organism in the mud and N, P, K are imposed on the farmland with the fertility that increases soil, the growth that promotes crop.Although it is low that this method has energy consumption, can utilize the advantages such as nutrient in the mud, the existence of a large amount of pathogenic bacterias and hazardous and noxious substances, particularly heavy metal in the mud has limited the suitability of soil to mud greatly.Sludge incineration is under greater than 600 degrees centigrade condition, makes the organic carbon in the mud, is converted into stably inorganics, and the advantage of sludge incineration is the to greatest extent volume of reduce mud, sludge incineration is general adopt directly burn and mummification after burn.Although it is very high to burn the degree that subtracts appearance and minimizing, the investment of burning is very large, and energy consumption and working cost are high.It is the method that adopt in coastal cities or city, island that mud is thrown the sea, and still along with the reinforcement of environmental protection consciousness, along with the reinforcement to marine ecology protection consciousness, this method is forbidden in a lot of countries at present.The method of existing burning process such as the method for Chinese invention patent ZL02104109.1 number disclosed a kind of sewage treatment plant sludge harmless sintering processes, the technical scheme of the mud of sintering method Treating Municipal Sewage treatment plant is adopted in this invention, it is a kind of method of manufacturing light ceramic simultaneously, and its technical process comprises mix, dehydration, drying and moulding take mud as main raw material, sinters product into; Content of the present invention is the ratio of the silicon composition that comprises in the raw material after mix, make its proportional range that after burning mistake, can form the silicate of silicate glass phase be: 50%～60%, the material fineness scope is: 2～4%, the suitable particle size range of mixing moulding granularity is 15～20mm, be 1100～1250 ℃ at the one-tenth Tao Wendu of calcining kiln kiln roasting section, the time of sintering is 10～15 minutes.This invention has certain active effect.
But the moisture percentage in sewage sludge of most sewage works 75%～80%, adopt existing method to process the energy that not only needs to consume a large amount of preciousnesses, and when consuming the energy, the waste gas of discharging also can be to environment.Even adopt the mode of compost also to need to take the big area soil, and the compost time is long, operability is not strong, is unfavorable for that the mud of Treating Municipal Sewage treatment plant obtains being rich in organic fertilizer fast and effectively.Therefore, there is defective in existing method for sludge treatment, be badly in need of providing a kind of pollute little, take up an area less, lignin-sludge speed is fast and what can obtain being rich in organic fertilizer is the method for fertilizer with the dealing with earthworm sludge of sewage treatment plant.
Summary of the invention
The purpose of this invention is to provide pollute little, take up an area less, lignin-sludge speed is fast and what can obtain being rich in organic fertilizer is the method for fertilizer with the dealing with earthworm sludge of sewage treatment plant.
Of the present invention is the method for fertilizer with the dealing with earthworm sludge of sewage treatment plant, it is characterized in that carrying out according to following steps:
A, preparation earthworm bed; The basic unit of earthworm bed adopts antiseepage to process;
B, carry out earthworm inoculation at the earthworm bed;
C, carry out feed at postvaccinal earthworm bed and add to form and pull the food layer; The feed dosing method is the mud that adds first sewage work, and approximately 1～2 month mud is exhausted by earthworm and adds the organism of mud total amount 1/10th again, treats that organism is exhausted and repeatedly carry out feed to add;
D, through gathering earthworms and wormcast in about 40 days;
E, add as one feels fit nutritive element according to the content of nitrogen phosphorus potassium in the wormcast that collects and obtain fertilizer product.
Answer in step a of the present invention that the chosen distance water source is near, draining is convenient, not ponding, performance of ventilating good, away from vacant lot (preferably woodland cultivation) the preparation earthworm bed of noise jamming; The earthworm bed can be 50 meters long, 1.5 meters wide, 80～150 mm thick, and the basic unit of earthworm bed adopts antiseepage to process; Establish the waterways around the earthworm bed, get 8 ‰ drainage grade, naturally effluxed by gravity; Cross over the draining of tractor road and adopt the reinforced concrete pipe pipe laying to pass through, guarantee that water exhaust system is safe and smooth; Scaffolding structure, plastic ceiling Rainproof heat-insulation, sunshade are adopted in earthworm bed top; Earthworm bed middle part is 2 meters wide servicesubways, is convenient to execute material and wormcast and collects, and People's Bank of China's observation passage of 0.6 meter is established in earthworm bed both sides, is convenient to sampling; Basic unit adopts clay core to process, and 50 centimeters～1 meter of clay thickness also can adopt the mixture of honey and oil cake as basic unit's antiseepage.Can around the earthworm bed, lay and observe well, be used for the monitoring groundwater pollution.Other related manufacturing processes of earthworm bed are identical with earthworm bed preparation method with existing vermiculture.As long as arrange appropriately, the upper minimizing pollutes to greatest extent.
In step b of the present invention, carry out the earthworm inoculation at the earthworm bed; The earthworm inoculum density is 1 cubic metre of 25 kilograms of earthworm on the earthworm bed.Can adopt Japan's " flat No. two greatly " earthworm, Eisenia foetida, William Pheretimatschiliensis etc. earthworm kind to carry out implantation.
In step c of the present invention, carry out feed at postvaccinal earthworm bed and add to form and pull the food layer; Pull the food layer thickness and be preferably in 80～150 millimeter, the feed dosing method is 2～3 days the mud of fresh or ripening that adds first sewage work, approximately 1～2 month mud is exhausted by earthworm, add again the organism of mud total amount 1/10th, treat that organism is exhausted and repeatedly carry out feed to add; Be to add first bulk mud (about 5 kilograms one) on the postvaccinal earthworm bed to allow earthworm pull food, to add after being exhausted with the mud ratio be that 10 to 1 organism is pulled food for earthworm Deng mud, increase crude protein quantity, the robust fibre amount of earthworm feedstuff, after organism is exhausted by earthworm, again add mud, mud is exhausted and continues to add organism, so repeatedly carries out earthworm feedstuff and adds.In adding the process of feed, can adopt loose food (feed) layer of pulling of manual type, improve sedimentation and the ventilation property of pulling the food layer, be conducive to the earthworm Fast-propagation and normally pull food.Organism described in the present invention is to be crushed to stalk about 2 centimetres, mushroom residue, dregs of a decoction one or a combination set of.Being that organism can be stalk or mushroom residue or the dregs of a decoction about 2 centimetres, also can be the mixture of stalk, mushroom residue and the dregs of a decoction, can certainly be the mixture of stalk and mushroom residue, stalk and the dregs of a decoction, mushroom residue and the dregs of a decoction.Certainly, also can adopt in case of necessity other discarded plant organisms to add as organism.
In steps d of the present invention, gather earthworm and wormcast through about 40 days, can finish the partial circulating that mud utilizes.This moment, earthworm bred, and carried out next sludge treatment circulation in order to keep 1 cubic metre of 25 kilograms of left and right sides earthworm of earthworm bed, needed to separate with unnecessary earthworm with by the wormcast that produces behind the dealing with earthworm mud.The rollover partition method is adopted in the collection of earthworm live body, when earthworm bed mud is about to exhaust, earthworm, earthworm ight soil, earthworm cocoon etc. are manually turned on one's side together to the other plastic cloth of earthworm bed, utilize the photophobia of earthworm, approximately after 30～60 minutes, overwhelming majority earthworm changes the bottom surface over to and forms earthworm group, separates with the earthworm cocoon through artificial wormcast with the surface again, namely can obtain the live body earthworm of bulk.Can certainly adopt this method to obtain the earthworm ight soil on surface.Earthworm after the collection and wormcast can be used as harmless that product directly enters ecotope or is used for other purposes.
In step e of the present invention, add as one feels fit nutritive element according to the content of nitrogen phosphorus potassium in the wormcast that collects and obtain fertilizer product, refer to the mud of dealing with earthworm municipal sewage plant, can change because of the working condition of season and/or sewage work, as with seasonal variation, envrionment temperature can affect its body temperature and movable and then affect the metabolism of earthworm, makes the nitrogen phosphorus potassium index in the wormcast deviation occur.And for example the mud production of sewage work also can be because environment change changes, and the mud organic content of producing can affect the voracious degree of earthworm, and then makes the nitrogen phosphorus potassium index in the wormcast deviation occur.Therefore need to add as one feels fit the fertilizer product that the nutritive element adjustment index just can obtain meeting national fertilizer standard according to the content of nitrogen phosphorus potassium in the wormcast that collects.And the average organic content of wormcast that obtains through above-mentioned steps is only low by 10% than the low limit value of national fertilizer standard code, also is rich in the high humic acid of nutritive value in the wormcast simultaneously, can become the fertilizer of high-quality after adding the part organic matter.Adding technology is with existing fertilizer adding technology.
Basic ideas of the present invention are: the mud that the municipal sewage plant produces is just accelerated along with urbanization process and is got more and more, and the sludge moisture content that the municipal sewage plant produces is high, burning, landfill, directly soil utilization etc. all can bring a series of harm, as atmospheric pollution, groundwater pollution, landfill place storage capacity reduce, energy consumption is large, processing costs is high and technical difficulty is large.The technician finds that earthworm is a kind of omnivore, their organic substances of eating in a large number, and the mechanical mill by gizzard and the biochemical action in the enteron aisle are decomposed and are transformed.Earthworm can be improved the fertility of soil, earthworm eat into rotten organism and a large amount of grogs, form ight soil through digestion and excrete, wherein contain abundant nitrogen, phosphorus, the nutrients such as potassium.Organic substance is under the combined action of the various biological enzymes (comprising proteolytic enzyme, lipase, cellulase, amylase and chitinase etc.) of earthworm digestive secretion and microorganism, can be hydrolyzed to the carbohydrate, fat, protein and more stable Mierocrystalline cellulose and the chitin that are easy to assimilate, and make soil mineral generation decomposition to a certain degree.These organic substances and inorganic mineral are further converted to plant and are easy to the attitude compound that utilizes, such as ammonia, carbonic acid and the easy phosphorus potassium mineral nutrient of urea, urine purine and the quick-acting of mineralising.These metabolism resultant product are most of closely compound with the soil of eating, and mixed upper earthworm body surface secretory product, urine etc. excrete with the form of wormcast, form nutritious, colory crumb structure in the soil.The uniform particles of wormcast, tasteless health, water conservation venting capability are higher 3 times than general soil.Wherein comprise 18 seed amino acids, contain organicly 42.2%, probiotics reaches every gram 200,000～200,000,000.Contain a large amount of microorganisms in the wormcast fertilizer, more valuable is to contain two or more at least antagonistic microbes.After these a large amount of beneficial microorganisms are manured into soil, can suppress rapidly the breeding of harmful bacteria, probiotics is bred expansion, reduces the generation of soil-borne disease, farm crop is difficult for sick.Utilize earthworm to process the efficient of organic waste very high, such as 100,000,000 earthworms, the 40 tons of organic waste of just can eating in a day.Have much studies show that, earthworm can significantly increase soil N P, K available nutrient content, and can improve urase in the soil, sucrase and microorganism active, strengthens the fertilizer provision from soil performance.Because earthworm can be humic acid substance with organic matter degradation, and its body surface can secrete labile monose organism, so earthworm can significantly improve the activity of Soil Microorganism.Utilize organic matter decomposition and conversion in the special biological function of earthworm and the microorganism in the environment synergy accelerate sludge, mud is converted into the bio-organic fertilizer of comprehensive nutrition, to reach the purpose of sewage sludge harmlessness, minimizing, recycling treatment disposal.Earthworm is mainly take the organism that rots as food, but organic gurry, various bacterium fungi after generally fresh plant organism, any feces of livestock and poultry, agricultural breeding are processed can be as the feeds of earthworm.Mud after the thickening of sanitary sewage disposal factory wherein contains the multiple nutrients material of earthworm growth and breeding needs.And can add different adjustment materials with mud C: N is modulated to 15～20: 1, pH is moderate, and water ratio 50%～60% carries out respectively fermentation maturity and fermentation is not exclusively become thoroughly decomposed, and can be conducive to carrying out fast of dealing with earthworm mud.And then provide the mud of technical feasibility, economical rationality for sludge disposal.The wormcast that forms behind the dealing with earthworm mud and other earthworms that in the lignin-sludge process, breed, can be used as product and directly enter ecotope or other purposes, neither waste energy and do not produce pollution, and floor space is few, strong operability, expense is relatively less, lignin-sludge efficient is high, can the industrialization industrialized development.
It is compared with the aforementioned existing similar products, of the present invention that to be that the method for fertilizer is polluted little, take up an area less, lignin-sludge speed is fast and can obtain being rich in organic fertilizer with the dealing with earthworm sludge of sewage treatment plant.
Content of the present invention is further described with the following Examples, but content of the present invention is not limited only to content related among the embodiment.
Embodiment
Be the method for fertilizer with the dealing with earthworm sludge of sewage treatment plant described in the present embodiment, it is characterized in that carrying out according to following steps:
A, chosen distance water source are near, draining convenient, not ponding, performance of ventilating good, prepare the earthworm bed away from the vacant lot of noise jamming; The earthworm bed is 50 meters long, 1.5 meters wide, 150 mm thick, and the basic unit of earthworm bed adopts antiseepage to process; Establish the waterways around the earthworm bed, get 8 ‰ drainage grade, naturally effluxed by gravity; Cross over the draining of tractor road and adopt the reinforced concrete pipe pipe laying to pass through, guarantee that water exhaust system is safe and smooth; Scaffolding structure, plastic ceiling Rainproof heat-insulation, sunshade are adopted in earthworm bed top; Earthworm bed middle part is 2 meters wide servicesubways, is convenient to execute material and wormcast and collects, and People's Bank of China's observation passage of 0.6 meter is established in earthworm bed both sides, is convenient to sampling; Basic unit adopts clay core to process 1 meter of clay thickness;
B, carry out earthworm inoculation at the earthworm bed; The earthworm inoculum density is 1 cubic metre of 25 kilograms of earthworm on the earthworm bed, adopts Japan's " flat No. two greatly " earthworm;
C, carry out feed at postvaccinal earthworm bed and add to form and pull the food layer; The feed dosing method is the mud that adds first 5 kilograms one bulk sewage work, approximately 2 months mud is exhausted by earthworm and adds mud total amount 1/10th again, about 0.5 kilogram one organism is treated that organism is exhausted and repeatedly carry out feed to add; Organism is the mixture that is crushed to stalk, mushroom residue and the dregs of a decoction about 2 centimetres;
D, adopted the rollover partition methods to gather earthworms and wormcast through about 40 days;
E, add as one feels fit nutritive element according to the content of nitrogen phosphorus potassium in the wormcast that collects and obtain fertilizer product.
Claims (4)
1. one kind is the method for fertilizer with the dealing with earthworm sludge of sewage treatment plant, it is characterized in that carrying out according to following steps:
A, preparation earthworm bed; The basic unit of earthworm bed adopts antiseepage to process;
B, carry out earthworm inoculation at the earthworm bed;
C, carry out feed at postvaccinal earthworm bed and add to form and pull the food layer; The feed dosing method is the mud that adds first sewage work, 1～2 month mud is exhausted by earthworm and adds the organism of mud total amount 1/10th again, treating that organism is exhausted and repeatedly carry out feed adds, and organism is to be crushed to stalk, mushroom residue, the dregs of a decoction of 2 centimetres one or a combination set of;
D, through gathering earthworms and wormcast in about 40 days;
E, add as one feels fit nutritive element according to the content of nitrogen phosphorus potassium in the wormcast that collects and obtain fertilizer product.
2. as claimed in claim 1 is the method for fertilizer with the dealing with earthworm sludge of sewage treatment plant, it is characterized in that the basic unit of earthworm bed among the described step a adopts clay core, 50 centimeters～1 meter of clay thickness.
3. as claimed in claim 1 is the method for fertilizer with the dealing with earthworm sludge of sewage treatment plant, it is characterized in that among the described step b that the earthworm inoculum density is 1 cubic metre of 25 kilograms of earthworm on the earthworm bed.
4. as claimed in claim 1 is the method for fertilizer with the dealing with earthworm sludge of sewage treatment plant, and the mud that it is characterized in that sewage work among the described step c carries out adding as earthworm feedstuff behind 2～3 days the ripening.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649652A (en) * | 2012-03-30 | 2012-08-29 | 宋忠俭 | Production method of earthworm cast-based ecological organic fertilizer |
| CN103086581A (en) * | 2013-02-24 | 2013-05-08 | 桂林理工大学 | Method for treating municipal sewage plant surplus sludge with earthworms |
| CN103988725B (en) * | 2014-05-27 | 2016-06-29 | 四川农业大学 | Municipal sludge is utilized to prepare flame nettle cultivation matrix and flame nettle cultural method |
| CN104945067A (en) * | 2015-07-09 | 2015-09-30 | 上海盛然农业科技有限公司 | Wormcast solid organic fertilizer and preparation method |
| CN105237050A (en) * | 2015-09-01 | 2016-01-13 | 黔东南苗族侗族自治州农业科学院 | Bio-fertilizer for flowers and preparation method thereof |
| CN109485218A (en) * | 2019-01-07 | 2019-03-19 | 李红旗 | A kind of organic wastes earthworm and ecologicals such as municipal sludge dispose workshop |
| CN112250269A (en) * | 2020-11-09 | 2021-01-22 | 重庆市浩骞农业发展有限责任公司 | Feeding method of biochemical system |
| CN112939640A (en) * | 2021-02-24 | 2021-06-11 | 广东省农业科学院茶叶研究所 | Production process of bioactive wormcast organic fertilizer |
| CN114716285A (en) * | 2022-03-31 | 2022-07-08 | 茅台学院 | Method for treating soy sauce wine sludge by using earthworms |
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| CN1369441A (en) * | 2001-02-15 | 2002-09-18 | 上海复旦申花净化技术股份有限公司 | System for treating organic sewage with earthworm |
| CN101348315A (en) * | 2008-09-02 | 2009-01-21 | 同济大学 | Method for processing excess sludge of town sewage plant using angleworm bio-filter |
| CN101412573A (en) * | 2008-11-15 | 2009-04-22 | 伏小勇 | Method for processing city life sludge by using angleworm |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369441A (en) * | 2001-02-15 | 2002-09-18 | 上海复旦申花净化技术股份有限公司 | System for treating organic sewage with earthworm |
| CN101348315A (en) * | 2008-09-02 | 2009-01-21 | 同济大学 | Method for processing excess sludge of town sewage plant using angleworm bio-filter |
| CN101412573A (en) * | 2008-11-15 | 2009-04-22 | 伏小勇 | Method for processing city life sludge by using angleworm |
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