CN102795725A - Method for whole-process recycling of multiple biogas slurry components - Google Patents
Method for whole-process recycling of multiple biogas slurry components Download PDFInfo
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- CN102795725A CN102795725A CN2012103014844A CN201210301484A CN102795725A CN 102795725 A CN102795725 A CN 102795725A CN 2012103014844 A CN2012103014844 A CN 2012103014844A CN 201210301484 A CN201210301484 A CN 201210301484A CN 102795725 A CN102795725 A CN 102795725A
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Abstract
The invention discloses a method for whole-process recycling of multiple biogas slurry components and belongs to the technical field of environmental protection. The method comprises the following steps of pre-treating biogas slurry by struvite precipitation and flocculation, carrying out solid-liquid separation to obtain biogas residues, carrying out blending, granulation and drying of the biogas residues to obtain organic fertilizer particles satisfying the NY525-2012 ''organic fertilizer'' standard, disinfecting a clear liquid obtained by solid-liquid separation, adding nutrients into the disinfected clear liquid to obtain an alga medium, separating out cultured algae, carrying out washing, drying and crushing of the cultured algae to obtain protein feed satisfying a feed hygiene standard, adding nutrients into the remaining liquid as a liquid fertilizer production mother liquor obtained by alga separation, adjusting a pH value of the mixed liquid, and carrying out ultrafiltration to obtain a liquid fertilizer product satisfying the GB/T17419-1998 ''foliar microelement fertilizer'' standard. The method provided by the invention realizes comprehensive, efficient and integrated utilization of biogas slurry components. Through marketing or utilization, organic fertilizer particles, foliar fertilizer and protein feed prepared by the method further improve the income and a return rate of biogas engineering.
Description
Technical field
The invention belongs to environmental technology field, particularly relate to the method for a kind of natural pond liquid polycomponent whole process resource utilization.
Background technology
At present, along with anaerobic fermentation natural pond broad application, natural pond liquid also produces thereupon in a large number.The resistates of natural pond liquid after as various organism anaerobically fermentings such as feces of livestock and poultry, agricultural crop straw, organic garbage of city; Except containing elements such as abundant nitrogen, phosphorus and organic matter; Also contain a large amount of trace elements, multiple amino acids, VITAMINs and profitable strain etc., disposing natural pond liquid how efficiently, cheaply becomes one of biogas engineering urgent problem.Generally speaking, directly be applied to the farmland, need consider bearing load with fertile season and farmland though natural pond liquid can be used as fertilizer, in case excessive, very easily cause soil pollution to reach the eutrophication of water body on every side.If regard natural pond liquid as sewage, then need handle accordingly, so that qualified discharge.Not only there is the problem that front-end investment is big, working cost is high in natural pond liquid as WWT, but also has wasted the various nutritive substances of the inside.Although part scientific research institutions have developed the special technology and the equipment of a large amount of natural ponds liquid recycling, because technology is immature, running cost is high, return rate is low etc., therefore effect is unsatisfactory in practical application.
Summary of the invention
In order to overcome problems such as running cost in the liquid recycling process of natural pond is high, return rate is low; The invention provides the method for a kind of natural pond liquid polycomponent whole process resource utilization; Realized comprehensive utilization to each component in the liquid of natural pond; Improve the return rate of biogas engineering, avoided random row of natural pond liquid or unreasonable application to cause the risk of environmental pollution.
The technical solution adopted for the present invention to solve the technical problems is:
The method of a kind of natural pond liquid polycomponent whole process resource utilization, this method comprises the steps:
(1) struvite deposition: through the concentration of ammonia nitrogen in the liquid of check and analysis natural pond,, add an amount of magnesium salts and phosphoric acid salt according to a certain percentage, fully stirring and evenly mixing, quiescent setting then according to the struvite generating principle; The magnesium salts that the said struvite precipitator method add is Natural manganese dioxide or Marinco H, and phosphoric acid salt is potassium primary phosphate, in reaction process, need not regulate the pH value, and time of repose is more than 30 minutes.
(2) flocculation: add flocculation agent in the natural pond liquid after handling through the struvite precipitator method, stirring and evenly mixing fully flocculates natural pond liquid; Flocculation agent is microbial flocculant or PAM or gathers molysite or gather aluminium salt.
(3) solid-liquid separation: the natural pond liquid after will flocculating is squeezed into solid-liquid separating machine through pump, isolates the natural pond slag; The equipment that solid-liquid separation adopts is plate and frame(type)filter press or centrifuge.
(4) utilize natural pond slag composting: with isolated natural pond slag, through processing the granular organic fertilizer that meets the NY525-2012 of the Ministry of Agriculture " organic fertilizer " standard after batching, granulation, the oven dry;
(5) utilize solid-liquid separating to support algae:,, to get into and support the algae pond with its foster algae through after disinfecting and adding the part nutritive substance through the clear liquid after the solid-liquid separation; The algae kind of cultivating is tenaculat Habenaria or chlorella.
(6) utilize algae to produce feed: through separating device algae to be separated, process the protein fodder that meets forage health standard after cleaning, dry, pulverize through the clear water of sterilizing;
(7) produce liquid fertilizer: the remaining liq after the algae processing as producing liquid fertile mother liquor, is obtained meeting the liquid fertile of GB/T17419-1998 " trace elements leaf fertilizer " standard through steps such as adjusting pH value, interpolation nutritive substance, ultrafiltrations.
The invention has the beneficial effects as follows, not only solved the ammonia, nitrogen of high density bio-toxicity problem, also increased nitrogen, phosphorus content in the slag of natural pond, make the granular organic fertilizer fertilizer efficiency that makes better algal grown through the struvite precipitation technology; Natural pond liquid is supported the algae technology and has been solved the problem that the routine biochemistry method is difficult to handle materials such as nitrogen, phosphorus in the liquid of natural pond, also the thalline that obtains has been made into high-quality protein feed; Remaining liq after at last algae being handled produces liquid fertile; Thereby make the various components in the liquid of natural pond obtain comprehensively, fully utilize efficiently, commercial products such as the granular organic fertilizer of making, foliage fertilizer, protein fodder are through selling or use income and the return rate that has improved biogas engineering.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Embodiment 1
Concentration through ammonia nitrogen in the liquid of check and analysis natural pond; According to the struvite generating principle, be the ratio of 1:1:1 according to ammonia nitrogen, mg ion and phosphate anion mol ratio, add an amount of powdery Marinco H and potassium primary phosphate; Through abundant stirring and evenly mixing, static then 30 minutes; Add flocculation agent PAM according to 0.1% weight ratio in the natural pond liquid after handling again, stir 10 minutes mixings, natural pond liquid is fully flocculated through the struvite precipitator method; Natural pond liquid after the flocculation is squeezed into plate-and-frame filter press through spiral pump, carry out solid-liquid separation; With isolated natural pond slag; Through adding weight ratio is after the peat composed of rotten mosses of 60% high organic content, high humic acid content carries out abundant stirring and evenly mixing; Through Squeezinggranulator granulation, drying drum oven dry; Process granular organic fertilizer, this granular organic fertilizer meets the standard of the NY525-2012 " organic fertilizer " of Ministry of Agriculture's promulgation; Through the clear liquid after the solid-liquid separation; Handle through chlorination; Guarantee that chlorine dosage is no less than 10mg/L, be no less than 30 minutes sterilization intensity action time, add weight ratio again and be 0.1% sodium hydrogencarbonate after; Algae kind after will joining through three grades of expansions inserts open foster algae pond; Cultivate and through filter cultured algae is separated after 14 days, after isolated algae is washed with the long-pending process disinfectant clear water of monoploid, through being qualified protein fodder after microwave dryer oven dry, pulverizing, Weighing, the packing; Rest in the algae pond through the production mother liquor of the liquid after the algae processing as liquid fertilizer; After regulating pH value to 5; Need add copper sulfate 4.34g, NSC 51149 3.25g, zinc sulfate 1.08g, sal epsom 1.08g, sodium tetraborate 1.08g, ammonium molybdate 1.08g, manganous sulfate 1.08g, potassiumiodide 1.08g, ferrous sulfate 1.08g according to configuration 5L liquid fertilizer; After stirring is all dissolved it; Adopt the ultrafiltration machine to filter, after measuring, packing, promptly get the liquid fertilizer that is suitable for sale or uses that meets GB/T17419-1998 " trace elements leaf fertilizer " standard.
Claims (6)
1. the method for a natural pond liquid polycomponent whole process resource utilization is characterized in that this method comprises the steps:
(1) struvite deposition: through the concentration of ammonia nitrogen in the liquid of check and analysis natural pond, according to the struvite generating principle, be 1:1:1 according to the mol ratio of ammonia nitrogen, mg ion and phosphate anion, add an amount of magnesium salts and phosphoric acid salt, abundant stirring and evenly mixing staticly settles then;
(2) flocculation: add flocculation agent in the natural pond liquid after handling through the struvite precipitator method, stirring and evenly mixing fully flocculates natural pond liquid;
(3) solid-liquid separation: the natural pond liquid after will flocculating is squeezed into solid-liquid separating machine through pump, isolates the natural pond slag;
(4) utilize natural pond slag composting: with isolated natural pond slag, through processing granular organic fertilizer after batching, granulation, the oven dry;
(5) utilize natural pond liquid to support algae:,, to get into and support the algae pond with its foster algae through after disinfecting and adding the part nutritive substance through the clear liquid after the solid-liquid separation;
(6) utilize algae to produce feed: through separating device algae to be separated, through processing the protein fodder that meets forage health standard after washing, oven dry, the pulverizing
(7) produce liquid fertilizer: the remaining liq after algae is handled obtains the liquid fertilizer that [meeting] meets GB/T17419-1998 " trace elements leaf fertilizer " standard as the liquid fertile mother liquor of production through the composite steps such as nutritive substance, adjusting pH value, ultrafiltration of promptly adding.
2. according to the method for the described natural pond of step (1) the liquid polycomponent whole process resource utilization of claim 1; It is characterized in that the magnesium salts that the struvite precipitator method add is Natural manganese dioxide, Marinco H, phosphoric acid salt is potassium primary phosphate; In reaction process, need not regulate the pH value, time of repose is more than 30 minutes.
3. according to the method for the described natural pond of step (2) the liquid polycomponent whole process resource utilization of claim 1, it is characterized in that flocculation agent is microbial flocculant or PAM or gathers molysite or gather aluminium salt.
4. according to the method for the described natural pond of step (3) the liquid polycomponent whole process resource utilization of claim 1, it is characterized in that the equipment that solid-liquid separation adopts is plate and frame(type)filter press or centrifuge.
5. according to the method for the described natural pond of step (5) the liquid polycomponent whole process resource utilization of claim 1, it is characterized in that the algae kind of cultivation is tenaculat Habenaria and chlorella.
6. according to the method for the described natural pond of step (6) the liquid polycomponent whole process resource utilization of claim 1, it is characterized in that the used water of algae washing is for through the disinfectant clear water, consumption is a times of algae volume.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103626575A (en) * | 2013-11-06 | 2014-03-12 | 湖北中化东方肥料有限公司 | Method for preparing high-efficient organic-inorganic compound fertilizer from biogas slurry |
| CN103936192A (en) * | 2014-04-02 | 2014-07-23 | 化工部长沙设计研究院 | High-concentration ammonia-nitrogen wastewater treatment process |
| CN104030482A (en) * | 2014-04-30 | 2014-09-10 | 惠州市天健新能源发展有限公司 | Biogas residue liquid processing method |
| CN105060543A (en) * | 2015-07-18 | 2015-11-18 | 常州市鼎日环保科技有限公司 | Ammonia nitrogen recovery method for biogas slurry in farm |
| CN105236668A (en) * | 2015-07-14 | 2016-01-13 | 南昌大学 | Magnesium hydrogen phosphate-assisted biological deamination biogas slurry pretreatment method |
| CN105272397A (en) * | 2015-10-12 | 2016-01-27 | 沙湾县亚宁农业科技开发有限公司 | Fertilizer preparation apparatus and method |
| CN105475385A (en) * | 2016-01-28 | 2016-04-13 | 济南思拓新源医药科技有限公司 | Method for preparing Chinese-chive-maggot-preventing pesticide through biogas slurry |
| CN105668739A (en) * | 2016-03-02 | 2016-06-15 | 北京农学院 | Biogas slurry treatment method |
| CN108002661A (en) * | 2017-12-29 | 2018-05-08 | 什邡市长丰化工有限公司 | A kind of nitrogenous, phosphorus waste water processing method |
| CN108218571A (en) * | 2018-01-13 | 2018-06-29 | 常州大学 | A kind of distributing pig farm fermentation waste prepares slow-release fertilizer method with zeolite compound |
| CN109607869A (en) * | 2018-12-31 | 2019-04-12 | 中北大学 | A kind of nitrophosphate fertilizer wastewater treatment method |
| CN109912076A (en) * | 2019-03-28 | 2019-06-21 | 江西中江环保股份有限公司 | A kind of processing method of Combined waste water efficient dephosphorization |
| CN111592170A (en) * | 2020-07-22 | 2020-08-28 | 北京锦绣新技术发展有限公司 | Preparation method of nano magnetic material loaded mineral soil for reducing COD (chemical oxygen demand) and heavy metals in excrement, sewage and biogas slurry wastewater |
| CN113636690A (en) * | 2021-10-15 | 2021-11-12 | 深圳市五谷网络科技有限公司 | Efficient purification and cyclic utilization method of biogas slurry |
| CN113845383A (en) * | 2021-10-29 | 2021-12-28 | 安徽工程大学 | Biogas slurry fertilizer and production method and application thereof |
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Cited By (19)
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|---|---|---|---|---|
| CN103626575A (en) * | 2013-11-06 | 2014-03-12 | 湖北中化东方肥料有限公司 | Method for preparing high-efficient organic-inorganic compound fertilizer from biogas slurry |
| CN103626575B (en) * | 2013-11-06 | 2016-03-16 | 湖北中化东方肥料有限公司 | A kind of natural pond liquid produces the method for organic-inorganic complex fertilizer |
| CN103936192A (en) * | 2014-04-02 | 2014-07-23 | 化工部长沙设计研究院 | High-concentration ammonia-nitrogen wastewater treatment process |
| CN103936192B (en) * | 2014-04-02 | 2015-05-27 | 化工部长沙设计研究院 | High-concentration ammonia-nitrogen wastewater treatment process |
| CN104030482B (en) * | 2014-04-30 | 2015-10-07 | 惠州市天健新能源发展有限公司 | A kind of working method of biogas residue liquid |
| CN104030482A (en) * | 2014-04-30 | 2014-09-10 | 惠州市天健新能源发展有限公司 | Biogas residue liquid processing method |
| CN105236668A (en) * | 2015-07-14 | 2016-01-13 | 南昌大学 | Magnesium hydrogen phosphate-assisted biological deamination biogas slurry pretreatment method |
| CN105060543A (en) * | 2015-07-18 | 2015-11-18 | 常州市鼎日环保科技有限公司 | Ammonia nitrogen recovery method for biogas slurry in farm |
| CN105272397A (en) * | 2015-10-12 | 2016-01-27 | 沙湾县亚宁农业科技开发有限公司 | Fertilizer preparation apparatus and method |
| CN105475385B (en) * | 2016-01-28 | 2018-08-17 | 芜湖航天特种电缆厂股份有限公司 | A method of preparing the pesticide of prevention bradysia odoriphaga using biogas slurry |
| CN105475385A (en) * | 2016-01-28 | 2016-04-13 | 济南思拓新源医药科技有限公司 | Method for preparing Chinese-chive-maggot-preventing pesticide through biogas slurry |
| CN105668739A (en) * | 2016-03-02 | 2016-06-15 | 北京农学院 | Biogas slurry treatment method |
| CN108002661A (en) * | 2017-12-29 | 2018-05-08 | 什邡市长丰化工有限公司 | A kind of nitrogenous, phosphorus waste water processing method |
| CN108218571A (en) * | 2018-01-13 | 2018-06-29 | 常州大学 | A kind of distributing pig farm fermentation waste prepares slow-release fertilizer method with zeolite compound |
| CN109607869A (en) * | 2018-12-31 | 2019-04-12 | 中北大学 | A kind of nitrophosphate fertilizer wastewater treatment method |
| CN109912076A (en) * | 2019-03-28 | 2019-06-21 | 江西中江环保股份有限公司 | A kind of processing method of Combined waste water efficient dephosphorization |
| CN111592170A (en) * | 2020-07-22 | 2020-08-28 | 北京锦绣新技术发展有限公司 | Preparation method of nano magnetic material loaded mineral soil for reducing COD (chemical oxygen demand) and heavy metals in excrement, sewage and biogas slurry wastewater |
| CN113636690A (en) * | 2021-10-15 | 2021-11-12 | 深圳市五谷网络科技有限公司 | Efficient purification and cyclic utilization method of biogas slurry |
| CN113845383A (en) * | 2021-10-29 | 2021-12-28 | 安徽工程大学 | Biogas slurry fertilizer and production method and application thereof |
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