| 基于太阳能加热的沼液负压蒸发浓缩研究 |
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| 引用本文： | 周文兵,武林,肖乃东,杜德利,张会敏. 基于太阳能加热的沼液负压蒸发浓缩研究[J]. 太阳能学报, 2021, 0(3): 154-163 |
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| 作者姓名： | 周文兵 武林 肖乃东 杜德利 张会敏 |
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| 作者单位： | 华中农业大学资源与环境学院生态与环境工程研究室;生猪健康养殖（湖北省）协同创新中心;武汉市天健农业发展有限责任公司 |
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| 基金项目： | 国家重点研发计划(2017YFD0800804-01);中央高校基本科研业务费专项(2662017JC018)。 |
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| 摘 要： | 研究不同加热方式(电加热或太阳能加热)、不同参数条件下沼液负压蒸发浓缩的效果,比较了不同因素对沼液浓缩的影响.主要研究结果如下:随着真空度、初始pH值或加热温度的升高,蒸发速率逐渐升高,NH3-N和TN的保留率和浓度逐渐降低,TP和TK的养分浓缩效果增强.综合考虑体积浓缩倍数、养分浓缩效果和养分保留率,最优组合取温度8...
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| 关 键 词： | 太阳能 负压蒸发 浓缩 沼液 |
STUDY ON CONCENTRATION OF ANAEROBIC DIGESTION EFFLUENT BY NEGATIVE PRESSURE EVAPORATION SYSTEM VIA SOLAR HEATING |
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| Zhou Wenbing,Wu Lin,Xiao Naidong,Du Deli,Zhang Huimin. STUDY ON CONCENTRATION OF ANAEROBIC DIGESTION EFFLUENT BY NEGATIVE PRESSURE EVAPORATION SYSTEM VIA SOLAR HEATING[J]. Acta Energiae Solaris Sinica, 2021, 0(3): 154-163 |
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| Authors: | Zhou Wenbing Wu Lin Xiao Naidong Du Deli Zhang Huimin |
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| Affiliation: | (Lab of Eco-Environmental Engineering Research,College of Resources and Environment,Huazhong Agricultural University,Wuhan 430010,China;Cooperative Innovation Center for Sustainable Pig Production,Wuhan 430070,China;Wuhan Tianjian Limited Company of Agriculture Development,Wuhan 430300,China) |
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| Abstract: | This paper investigated the effect of different heating styles(heating by electricity or solar energy) and evaporation conditions on the concentration of anaerobic digestion effluent,and the influence of different factors on the concentration of anaerobic digestion effluent was compared. The results showed that the evaporation rate of the anaerobic digestion effluent and the concentration effect of TP and TK were increased while the retention rate and concentration of NH3-N and TN were gradually decreased with the increasing of vacuum degree,initial pH value or heating temperature. The optimum heating temperature,vacuum degree and initial pH value of anaerobic digestion effluent concentration system was respectively 85 ℃,90% and 5.0 via comprehensive consideration of the multiple of volume reduction,the nutrient concentration effect and the nutrient retention rate. Then the concentration of anaerobic digestion effluent via solar heating was conducted under the conditions of vacuum degree of 90% and initial pH value of 5. The results indicated that there was about 1 to 1.5 h when 500 m L of anaerobic digestion effluent being concentrated to 50 mL,and the main nutrients of nitrogen,phosphorus and potassium of the concentrated anaerobic digestion effluent were improved almost 10 times with the nutrient retention rate of 90%. The total nutrient content of N,P and K in the concentrated anaerobic digestion effluent was close to the requirement of the Standard of Liquid Fertilizer DB33/699—2008"Quality and Safety Requirements for Organic Liquid Fertilizer".Obviously,the concentration of anaerobic digestion effluent by negative evaporation system via solar heating is feasible,and it could provide a new way for the utilization of anaerobic digestion effluent. |
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| Keywords: | solar energy vacuum evaporation concentration anaerobic digestion effluent |
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