CN102627486B - Method utilizing acidized conditioner to perform sludge aerobic compost - Google Patents
Method utilizing acidized conditioner to perform sludge aerobic compost Download PDFInfo
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- CN102627486B CN102627486B CN2012101261940A CN201210126194A CN102627486B CN 102627486 B CN102627486 B CN 102627486B CN 2012101261940 A CN2012101261940 A CN 2012101261940A CN 201210126194 A CN201210126194 A CN 201210126194A CN 102627486 B CN102627486 B CN 102627486B
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
A method utilizing an acidized conditioner to perform sludge aerobic compost solves the problems that in the existing compost process, a high temperature period pH value is high, ammonia volatilization amount is large, nitrogen loss is serious, and cost is high caused by a traditional method for regulating pH that large amount of medicament needs to be added in the compost process. The method comprises first, enabling KHSO4 solution to serve as acidizing liquid, soaking the conditioner in the acidizing liquid, and taking out the soaked conditioner and drying the conditioner; second, taking the conditioner preprocessed by acidizing, mixing the conditioner with dewatered sludge, and regulating the pH value of the mixture; third, performing high temperature compost on the mixture, maintaining for three to five days in the high temperature period, continuing composting the mixture till the temperature of a compost body is lowered to be room temperature, and the high temperature compost is finished. The acidizing liquid used by the method can be reused, implement cost is reduced, ammonia volatilization is effectively controlled, and nitrogen loss is reduced. The method utilizing the acidized conditioner to perform the sludge aerobic compost is used in the field of sludge aerobic compost.
Description
Technical field
The present invention relates to a kind of method that amendment that utilizes acidified processing carries out sludge aerobic compost.
Background technology
Along with the attention of people to environment protection, the by product mud in the middle of sewage treatment process causes that more and more people pay close attention to.Sewage Sludge in Composting technique is one of the sludge disposal technology more widely of application at present.Mud and amendment after the mixed fermentation of certain hour, can be realized minimizing, innoxious and resource utilization simultaneously.In the During High-Temperature Composting process of routine, be subject to the impact of the factors such as temperature, pH value, rate of venting, C/N, the nitrogen of heap body inside 50% evaporate in the middle of environment with the form of ammonia, has not only caused odor pollution, near resident is healthy, threatens; Simultaneously, reduced the fertilizer efficiency of compost product nitrogen.In causing the reason of nitrogen loss, high temperature and high pH are main influence factors, and wherein hot conditions is the leading indicator that composting process is completed smoothly, so the investigator attempts by regulation and control composting process pH value to control the loss of nitrogen.
At present, the method of traditional regulation and control composting process pH value has and directly adds acidic substance, buffering salt and can being degraded by microorganisms as the organic acid larger molecular organics, above method needs to add in a large number medicament in implementation process, increased production cost, and to dosage and dosing method, require stricter, pH value regulating effect is unstable, and the control effect of ammonia volatilization is not remarkable.Therefore, its application is restricted greatly.
Summary of the invention
The present invention will solve in existing composting process because pliotherm period pH value causes than high that the ammonia volatile quantity is large, nitrogen loss is serious, the method of tradition regulation and control composting process pH need to add a large amount of medicaments and cause the high problem of cost, provides a kind of amendment that utilizes acidified processing to carry out the method for sludge aerobic compost.
The present invention utilizes the amendment of acidified processing to carry out the method for sludge aerobic compost, carries out according to the following steps: with mass concentration, be one, 1% KHSO
4Solution, as acidizing fluid, is chosen the amendment that diameter is 10～30mm, gets 60～80g amendment and is soaked in the 1L acidizing fluid, soaks 22～25h, and it is 4%～6% that the amendment taking-up after soaking is dried to water ratio, obtains the pretreated amendment of acidifying; Two, get the pretreated amendment of step 1 acidifying and mix by weight 1: 1 with dewatered sludge, obtain mixture, wherein dewatered sludge weight is dry basis, and the pH value of regulating mixture is 5～6; Three, the mixture of amendment in step 2 and dewatered sludge is carried out During High-Temperature Composting, rate of venting is 0.05～2m
3/ min, kept 3～5 days in the pliotherm period, then continues to bank up to heap temperature to drop to room temperature, namely completes During High-Temperature Composting.
Acidizing fluid used in the present invention is reusable.
Pliotherm period described in step 3 refers to that heap temperature reaches the period of 55～60 ℃.
The present invention has following advantage:
1, avoided the extra program that adds medicament, the acidizing fluid that uses can reuse, and has reduced implementation cost, has simplified regulate and control method; Avoid a large amount of chemical agents that add to the restraining effect that microbial biochemical reaction produces, promoted the utilization of composting process microorganism to organic matter;
2, acidifying pre-treatment amendment maintains under the suitable condition of microorganism composting process pH, thereby has accelerated the inner microbial growth breeding of heap body;
3, acidifying pre-treatment amendment used in the present invention can effectively reduce sludge composting process pliotherm period pH value, effectively controlled the ammonia volatilization, reduced composting process environmental pollution on every side, after end cycle of compost, compare with control group (only adding common wood chip), in composting process, the volatilization of accumulation ammonia reduces 33.58%, after one time fermentation finishes, nitrogen loss has reduced 1/2, is only 20.8%.
Description of drawings
Fig. 1 is the change curve of pH value in embodiment six During High-Temperature Composting processes; Fig. 2 is the change curve of accumulation ammonia volatile quantity in embodiment six During High-Temperature Composting processes.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: present embodiment utilizes the amendment of acidified processing to carry out the method for sludge aerobic compost, carries out according to the following steps: with mass concentration, be one, 1% KHSO
4Solution, as acidizing fluid, is chosen the amendment that diameter is 10～30mm, gets 60～80g amendment and is soaked in the 1L acidizing fluid, soaks 22～25h, and it is 4%～6% that the amendment taking-up after soaking is dried to water ratio, obtains the pretreated amendment of acidifying; Two, get the pretreated amendment of step 1 acidifying and mix by weight 1: 1 with dewatered sludge, obtain mixture, wherein dewatered sludge weight is dry basis, and the pH value of regulating mixture is 5～6; Three, the mixture of amendment in step 2 and dewatered sludge is carried out During High-Temperature Composting, rate of venting is 0.05～2m
3/ min, kept 3～5 days in the pliotherm period, then continues to bank up to heap temperature to drop to room temperature, namely completes During High-Temperature Composting.
The acidizing fluid that present embodiment is used is reusable.
Pliotherm period described in step 3 refers to that heap temperature reaches the period of 55～60 ℃.
Embodiment two: what present embodiment was different from embodiment one is: amendment described in step 1 is wood chip, stalk or straw.Other is identical with embodiment one.
Embodiment three: what present embodiment was different from embodiment one or two is: get the 70g amendment in step 1 and be soaked in the 1L acidizing fluid.Other is identical with embodiment one or two.
Embodiment four: what present embodiment was different from one of embodiment one to three is: drying means described in step 1 is natural air drying or is placed in the drying plant of 50～60 ℃ and dries.Other is identical with one of embodiment one to three.
Embodiment five: what present embodiment was different from one of embodiment one to four is: the water ratio of dewatered sludge described in step 2 is 70%～80%.Other is identical with one of embodiment one to four.
Embodiment six: present embodiment utilizes the amendment of acidified processing to carry out the method for sludge aerobic compost, carries out according to the following steps: with mass concentration, be one, 1% KHSO
4Solution, as acidizing fluid, is chosen the wood chip that diameter is 10～30mm, gets the 70g wood chip and is soaked in the 1L acidizing fluid, soaks 24h, and it is 5% that the wood chip taking-up after soaking is dried to water ratio, obtains the pretreated wood chip of acidifying; Two, get the pretreated wood chip of step 1 acidifying and mix by weight 1: 1 with dewatered sludge, obtain mixture, wherein dewatered sludge weight is dry basis, and the pH value of regulating mixture is 6; Three, the mixture of wood chip in step 2 and dewatered sludge is carried out During High-Temperature Composting, rate of venting is 0.5m
3/ min, kept 4 days in the pliotherm period, then continues to bank up to heap temperature to drop to room temperature, namely completes During High-Temperature Composting.
, for the effect of checking present embodiment, carry out following contrast experiment: use the aerobic compost method of present embodiment as experimental group, use be the wood chip of acidified processing; Control group uses common wood chip, and other steps are identical with the present embodiment method.
In the During High-Temperature Composting process change curve of pH value as shown in Figure 1, in Fig. 1-●-expression experimental group ,-■-expression control group; Accumulate the change curve of ammonia volatile quantity in the During High-Temperature Composting process as shown in Figure 2 ,-●-expression control group ,-■-expression experimental group.Use as can be seen from Figure the method for present embodiment to carry out sludge aerobic compost, in the During High-Temperature Composting process, the pH value is than the remarkable reduction of control group, and the ammonia volatile quantity is than the remarkable reduction of control group.
Before detecting compost and the total nitrogen content after compost, as shown in table 1.
The total nitrogen content that table 1 compost is forward and backward
| Total nitrogen (%) before compost | Total nitrogen after compost (%) | Nitrogen loss (%) | |
| Experimental group | 2.13 | 3.58 | 20.80％ |
| Control group | 2.25 | 3.50 | 41.43％ |
The nitrogen loss calculation formula is:
Ash oontent when wherein X1 is initial, the ash oontent when X2 is end; N1 is the content of initial kjeldahl nitrogen, and N2 is for finishing the content of kjeldahl nitrogen.
Present embodiment uses acidifying pre-treatment wood chip to carry out sludge aerobic compost, can effectively reduce sludge composting process pliotherm period pH value, effectively controlled the ammonia volatilization, reduced composting process environmental pollution on every side, after end cycle of compost, with control group, compared, in composting process, the volatilization of accumulation ammonia reduces 33.58%, after one time fermentation finished, nitrogen loss had reduced 1/2, is only 20.8%.
Claims (4)
1. an amendment that utilizes acidified processing carries out the method for sludge aerobic compost, it is characterized in that utilizing the amendment of acidified processing to carry out the method for sludge aerobic compost, carries out according to the following steps: with mass concentration, be one, 1% KHSO
4Solution, as acidizing fluid, is chosen the amendment that diameter is 10～30mm, gets 60～80g amendment and is soaked in the 1L acidizing fluid, soaks 22～25h, and it is 4%～6% that the amendment taking-up after soaking is dried to water ratio, obtains the pretreated amendment of acidifying; Two, get the pretreated amendment of step 1 acidifying and mix by weight 1:1 with dewatered sludge, obtain mixture, wherein dewatered sludge weight is dry basis, and the pH value of regulating mixture is 5～6; Three, the mixture of amendment in step 2 and dewatered sludge is carried out During High-Temperature Composting, rate of venting is 0.05～2m
3/Min, kept 3～5 days in the pliotherm period, then continues to bank up to heap temperature to drop to room temperature, namely completes During High-Temperature Composting;
The described amendment of step 1 is wood chip, stalk or straw.
2. a kind of amendment that utilizes acidified processing according to claim 1 carries out the method for sludge aerobic compost, it is characterized in that in step 1 getting the 70g amendment and is soaked in the 1L acidizing fluid.
3. a kind of amendment that utilizes acidified processing according to claim 2 carries out the method for sludge aerobic compost, it is characterized in that drying means described in step 1 is natural air drying or is placed in the drying plant of 50～60 ℃ and dries.
4. a kind of amendment that utilizes acidified processing according to claim 3 carries out the method for sludge aerobic compost, and the water ratio that it is characterized in that dewatered sludge described in step 2 is 70%～80%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103992146A (en) * | 2014-05-04 | 2014-08-20 | 张良 | Activated sludge fertilizer |
| CN107353043B (en) * | 2016-12-07 | 2021-04-02 | 河南师范大学 | Multilayer aerobic fermentation system and fermentation method thereof |
| CN109180251A (en) * | 2018-11-20 | 2019-01-11 | 江南大学 | A kind of method of aerobic compost |
| CN115043680A (en) * | 2022-08-17 | 2022-09-13 | 安丘市天赐生物肥料有限公司 | Method for preparing fertilizer from kitchen garbage |
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| US4483704A (en) * | 1980-08-07 | 1984-11-20 | Easter Ii James M | Method for composting sludge |
| CN101139231A (en) * | 2006-09-08 | 2008-03-12 | 中国科学院过程工程研究所 | Method for preparing organic composite fertilizer by micro-wave pretreatment of solid organic waste material |
| CN101367678A (en) * | 2008-09-27 | 2009-02-18 | 哈尔滨工业大学 | Amendment and uses of the same in sludge composting |
| CN101659572A (en) * | 2009-09-08 | 2010-03-03 | 河北师范大学 | Method for producing fertilizer by utilizing mud and plant straws |
| CN102260104A (en) * | 2011-05-20 | 2011-11-30 | 烟台大学 | Method for producing biological organic fertilizer by fermenting sludge |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6115886A (en) * | 1984-06-29 | 1986-01-23 | Sumitomo Chem Co Ltd | 1,2,4-triazolothiazolopyridine derivative, its preparation and insecticide containing the same |
| JP2007222852A (en) * | 2006-02-27 | 2007-09-06 | Niigata Univ | Method for high-speed fermentation treatment of organic waste and product thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4483704A (en) * | 1980-08-07 | 1984-11-20 | Easter Ii James M | Method for composting sludge |
| CN101139231A (en) * | 2006-09-08 | 2008-03-12 | 中国科学院过程工程研究所 | Method for preparing organic composite fertilizer by micro-wave pretreatment of solid organic waste material |
| CN101367678A (en) * | 2008-09-27 | 2009-02-18 | 哈尔滨工业大学 | Amendment and uses of the same in sludge composting |
| CN101659572A (en) * | 2009-09-08 | 2010-03-03 | 河北师范大学 | Method for producing fertilizer by utilizing mud and plant straws |
| CN102260104A (en) * | 2011-05-20 | 2011-11-30 | 烟台大学 | Method for producing biological organic fertilizer by fermenting sludge |
Non-Patent Citations (2)
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| JP特开2007-222852A 2007.09.06 |
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