WO2024087097A1 - 一种利用污泥发酵和微藻培养同时进行废水处理和生产清洁能源的方法 - Google Patents
一种利用污泥发酵和微藻培养同时进行废水处理和生产清洁能源的方法 Download PDFInfo
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- 238000000855 fermentation Methods 0.000 title claims abstract description 67
- 230000004151 fermentation Effects 0.000 title claims abstract description 63
- 239000010802 sludge Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002351 wastewater Substances 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 51
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000001257 hydrogen Substances 0.000 claims abstract description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 17
- 239000002028 Biomass Substances 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims abstract 4
- 241000195663 Scenedesmus Species 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000005416 organic matter Substances 0.000 claims description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 4
- 238000003306 harvesting Methods 0.000 claims description 3
- 238000005984 hydrogenation reaction Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 235000016425 Arthrospira platensis Nutrition 0.000 claims description 2
- 240000002900 Arthrospira platensis Species 0.000 claims description 2
- 241000195649 Chlorella <Chlorellales> Species 0.000 claims description 2
- 241000206751 Chrysophyceae Species 0.000 claims description 2
- 241000195634 Dunaliella Species 0.000 claims description 2
- 241000196317 Platymonas Species 0.000 claims description 2
- 238000010306 acid treatment Methods 0.000 claims description 2
- 238000005273 aeration Methods 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000003112 inhibitor Substances 0.000 claims description 2
- 239000010801 sewage sludge Substances 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- YOEDSPGOICMHPK-UHFFFAOYSA-M sodium;1,1-dibromoethanesulfonate Chemical compound [Na+].CC(Br)(Br)S([O-])(=O)=O YOEDSPGOICMHPK-UHFFFAOYSA-M 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 229940082787 spirulina Drugs 0.000 claims description 2
- 238000009210 therapy by ultrasound Methods 0.000 claims description 2
- 239000004519 grease Substances 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 14
- 150000007524 organic acids Chemical class 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000002803 fossil fuel Substances 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 239000003225 biodiesel Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 235000005985 organic acids Nutrition 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000013537 high throughput screening Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
Definitions
- the invention relates to a method for simultaneously treating wastewater and producing clean energy by utilizing sludge fermentation and microalgae cultivation, and belongs to the technical field of environmental protection and energy production.
- Fermentation hydrogen production can use wastewater as a fermentation substrate, but the organic matter in the wastewater will form hydrogen and by-product small molecular organic acids under the action of bacteria, which limits the fermentation hydrogen production process.
- microorganisms that can synergize with hydrogen-producing bacteria are needed.
- Microalgae can use small molecular organic acids for growth and oil production, and its temperature and pH adaptability range is relatively wide, which is in line with the requirements of hydrogen-producing bacteria. This continues the production process, improves the conversion efficiency of the substrate, and at the same time can expand the scope of substrate utilization, achieving efficient substrate utilization and deep production capacity.
- the purpose of the present invention is to provide a method for simultaneously treating wastewater and producing clean energy by using sludge fermentation and microalgae cultivation, aiming to provide a new way to utilize wastewater, reduce its pollution to the environment, and recover clean energy such as hydrogen and oil to realize the resource utilization of wastewater.
- the method of the present invention for simultaneously treating wastewater and producing clean energy by utilizing sludge fermentation and microalgae cultivation is achieved by the following steps:
- Sludge pretreatment treat the sludge for a certain period of time to obtain sludge treatment liquid A; 2. add sludge treatment liquid A to wastewater B for anaerobic fermentation to produce hydrogen and fermentation liquid C; 3. after the fermentation is stable, discharge a certain amount of fermentation liquid C, and add an equal amount of fresh wastewater B, this step can be repeated 1-100 times to end the fermentation; 4. remove the solids in the fermentation liquid C to obtain fermentation liquid D; 5. add microalgae seed liquid E to the fermentation liquid D, and the microalgae can use the organic matter in the fermentation liquid D to grow and synthesize oil; 6.
- this step can be repeated 1-100 times to end the fermentation; 7. harvest the microalgae biomass in the microalgae fermentation liquid F, and extract the oil contained in the microalgae.
- the sludge in step 1 is one or more of residual sludge, digested sludge, anaerobic granular sludge, sewage sludge, and soil mixed in any ratio.
- the sludge treatment method in step one is one or a combination of several methods including heat treatment, acid treatment, alkali treatment, hydrogen peroxide treatment, ultrasonic treatment, microwave treatment, methane inhibitor treatment, chloroform treatment, sodium dibromoethane sulfonate treatment, irradiation treatment, aeration treatment, and shock load treatment.
- the treatment time in step 1 is 0.5-1.5 hours.
- the discharge amount of the fermentation liquid C in step 3 accounts for 25-100% of the total amount.
- the microalgae seed solution E described in step 5 is one or more of Scenedesmus, Chlorella, Diatom, Cryptodinium, Platymonas, Dunaliella, Spirulina, and Chrysophyte mixed in any ratio.
- the discharge amount of the microalgae fermentation liquid F in step six accounts for 25-100% of the total amount.
- the present invention uses wastewater as raw material to produce hydrogen and oil, which can achieve efficient utilization of wastewater and reduce its adverse impact on the environment.
- using wastewater as raw material helps to reduce the production cost of bioenergy, realizes the resource utilization of wastewater, is of great significance for accelerating the industrialization of biodiesel and biohydrogen production technology, and has good economic and environmental benefits.
- FIG. 1 is a diagram showing hydrogen production in an embodiment of the present invention.
- FIG. 2 is a graph showing the concentration of organic acids in the hydrogen production process according to an embodiment of the present invention.
- FIG. 3 is a graph showing microalgae yield and oil yield in an embodiment provided by the present invention.
- FIG. 4 is a graph showing the organic acid concentration during the microalgae cultivation process in an embodiment provided by the present invention.
- Specific implementation method 1 A method of using sludge fermentation and microalgae cultivation to simultaneously treat wastewater and produce clean energy is achieved by the following steps:
- Scenedesmus sp. was obtained by screening using the method in the published Chinese invention patent "A high-throughput screening method for oil-rich microalgae" (application number: CN201310096030.2).
- the hydrogen production in this embodiment is 741.4 mL H 2 /L working volume.
- the microalgae yield in this embodiment is 1.12 g/L working volume
- the oil yield is 0.4 g/L working volume.
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- Botany (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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Abstract
一种利用污泥发酵和微藻培养同时进行废水处理和生产清洁能源的方法，包括以下步骤：一、污泥预处理，得到处理液A；二、向废水B中接入处理液A，进行厌氧发酵，产生氢气和发酵液C；三、发酵稳定后，排出一定量的发酵液C，补充新鲜的废水B；四、处理发酵液C，得到发酵液D；五、发酵液D中接入微藻种子液E；六、排出一定量的微藻发酵液F，并补充发酵液D；七，采收微藻发酵液F中的微藻生物质，提取微藻所含的油脂。通过所述方法，能够回收清洁能源，实现废水的资源化。
Description
本发明涉及一种利用污泥发酵和微藻培养同时进行废水处理和生产清洁能源的方法，属于环境保护和能源生产技术领域。
能源是人类赖以生存和发展的基础，现代能源主要来自石油、天然气、煤炭等化石燃料。化石燃料是不可再生能源，需要千万年甚至几亿年才能形成，目前全世界对化石燃料的大量开采和消耗，使得世界范围内能源短缺现象越来越严重。另一方面，化石燃料的转化过程中会产生大量的环境污染物，带来温室效应等全球性的环境和生态问题。利用微藻生产生物柴油对缓解能源危机和保护环境有重要意义，是具有发展潜力和应用前景的生物能源技术，而生产原料不足制约着微藻生物柴油的规模化应用。发酵制氢可以利用废水为发酵底物，但废水中的有机物在细菌的作用下会形成氢气和副产物小分子有机酸，限制了发酵制氢过程。为了消除小分子有机酸积累的影响，提高有机物的去除效率，实现高效、稳定的氢气生产，需要可与产氢细菌协同作用的微生物。微藻能利用小分子有机酸进行生长和产油，其温度及pH适应范围较宽，正适应了产氢细菌的要求。这延续了产能过程，提高了底物的转化效率，同时能够扩大了底物的利用范围，实现了底物的高效利用和深度产能。目前，采用废水为发酵基质进行氢气和油脂半连续生产的技术方法尚鲜有报道。
发明内容
本发明的目的是提供一种利用污泥发酵和微藻培养同时进行废水处理和生产清洁能源的方法，旨在提供一种新的废水利用途径，减少其对环境的污染，并回收氢气和油脂等清洁能源，实现废水的资源化。
本发明的一种利用污泥发酵和微藻培养同时进行废水处理和生产清洁能源的方法，是通过以下步骤实现的：
一、污泥预处理：将污泥处理一定时间，得到污泥处理液A；二、向废水B中接入污泥处理液A，进行厌氧发酵，产生氢气和发酵液C；三、发酵稳定后，排出一定量的发酵液C，并补充等量的新鲜的废水B，此步骤可重复1-100次，结束发酵；四、去除发酵液C中的固体，得到发酵液D；五、在发酵液D中接入微藻种子液E，微藻可利用发酵液D中的有机物进行生长并合成油脂；六、微藻发酵稳定后，排出一定量的微藻发酵液F，并补充等量的新鲜的发酵液D，此步骤可重复1-100次，结束发酵；七、采收微藻发酵液F中的微藻生物质，提取微藻所含的油脂。
其中，步骤一中的污泥为剩余污泥、消化污泥、厌氧颗粒污泥、下水道污泥、土壤中一种或几种按任意比混合。
步骤一中的污泥处理方法为热处理、酸处理、碱处理、过氧化氢处理、超声波处理、微波处理、甲烷抑制剂处理、氯仿处理、二溴乙烷磺酸钠处理、辐照处理、曝气处理、冲击负荷处理中一种或几种方法的组合。
步骤一中的处理时间为0.5-1.5小时。
步骤三中的发酵液C的排出量占总量的25-100％。
步骤五中所述的微藻种子液E为栅藻、小球藻、硅藻、隐甲藻、扁藻、杜氏藻、螺旋藻、金藻中的一种或几种按任意比混合。
步骤六中微藻发酵液F的排出量占总量的25-100％。
本发明包含以下有益效果：
本发明以废水为原料进行氢气和油脂的生产，可实现废水的高效利用，减少其对环境的不良影响。同时，以废水为原料有助于降低生物能源的生产成本，实现了废水的资源化，对于加快生物柴油和生物制氢技术的产业化步伐有重要意义，具有较好的经济效益和环境效益。
图1为本发明提供的实施例中氢气产量图。
图2为本发明提供的实施例中产氢过程有机酸浓度图。
图3为本发明提供的实施例中微藻产量和油脂产量图。
图4为本发明提供的实施例中微藻培养过程有机酸浓度图。
本发明技术方案不局限于以下所列举具体实施方式，还包括各具体实施方式间的任意组合。
具体实施方式一：本实施方式的一种利用污泥发酵和微藻培养同时进行废水处理和生产清洁能源的方法，是通过以下步骤实现：
一、将污泥在100℃下处理1小时，得到污泥处理液A；二、向废水B中接入污泥处理液A，进行厌氧发酵，产生氢气和发酵液C；三、发酵稳定后，排出50％的发酵液C，并补充等量的新鲜的废水B，此步骤重复58次，结束发酵；四、去除发酵液C中的固体，得到发酵液D；五、在发酵液D中接入栅藻种子液E，栅藻可利用发酵液D中的有机物进行生长并合成油脂；六、栅藻发酵稳定后，排出50％的栅藻发酵液F，并补充等量的新鲜的发酵液D，此步骤重复14次，结束发酵；七、采收栅藻发酵液F中的栅藻生物质，提取栅 藻所含的油脂。
其中栅藻(Scenedesmus sp.)采用已公开中国发明专利《一种富油微藻的高通量筛选方法》(申请号：CN201310096030.2)中的方法筛选获得。
本实施例通过图1氢气产量图可知，氢气产量为741.4mL H
2/L工作体积。
本实施例通过图2微藻产量和油脂产量图可知，微藻产量为1.12g/L工作体积，油脂产量为0.4g/L工作体积。
Claims (7)
- 一种利用污泥发酵和微藻培养同时进行废水处理和生产清洁能源的方法，其特征是它包括如下步骤：一、污泥预处理：将污泥处理一定时间，得到污泥处理液A；二、向废水B中接入污泥处理液A，进行厌氧发酵，产生氢气和发酵液C；三、发酵稳定后，排出一定量的发酵液C，并补充等量的新鲜的废水B，此步骤可重复1-100次，结束发酵；四、去除发酵液C中的固体，得到发酵液D；五、在发酵液D中接入微藻种子液E，微藻可利用发酵液D中的有机物进行生长并合成油脂；六、微藻发酵稳定后，排出一定量的微藻发酵液F，并补充等量的新鲜的发酵液D，此步骤可重复1-100次，结束发酵；七、采收微藻发酵液F中的微藻生物质，提取微藻所含的油脂。
- 根据权利要求1所述的方法，其特征在于步骤一中的污泥为剩余污泥、消化污泥、厌氧颗粒污泥、下水道污泥、土壤中一种或几种按任意比混合。
- 根据权利要求1所述的方法，其特征在于步骤一中的污泥处理方法为热处理、酸处理、碱处理、过氧化氢处理、超声波处理、微波处理、甲烷抑制剂处理、氯仿处理、二溴乙烷磺酸钠处理、辐照处理、曝气处理、冲击负荷处理中一种或几种方法的组合。
- 根据权利要求1所述的方法，其特征在于步骤一中的处理时间为0.5-1.5小时。
- 根据权利要求1所述的方法，其特征在于步骤三中的发酵液C的排出量占总量的25-100％。
- 根据权利要求1所述的方法，其特征在于步骤五中所述的微藻种子液E为栅藻、小球藻、硅藻、隐甲藻、扁藻、杜氏藻、螺旋藻、金藻中的一种或几种按任意比混合。
- 根据权利要求1所述的方法，其特征在于步骤六中微藻发酵液F的排出量占总量的25-100％。
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| CN104789602A (zh) * | 2015-05-19 | 2015-07-22 | 哈尔滨工业大学 | 一种细菌与微藻共培养处理淀粉废水同步产能的方法 |
| CN111763694A (zh) * | 2019-04-18 | 2020-10-13 | 哈尔滨工业大学 | 一种高温制氢与微藻产油耦合产能的方法 |
| CN110484571A (zh) * | 2019-09-29 | 2019-11-22 | 哈尔滨工业大学 | 利用玉米秸秆半连续生产氢气和油脂的方法 |
| CN114378105A (zh) * | 2022-01-19 | 2022-04-22 | 重庆大学 | 一种餐厨垃圾与纤维素生物质协同的多级处理***及方法 |
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