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Volume 38 Issue 5
Aug.  2020
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Article Navigation >  ENVIRONMENTAL ENGINEERING  > 2020  >  38(5): 144-149
DENG Qing-hua, ZHANG Jian, XIAN-Ping, FANG Qing, MENG Zheng-cheng. IMPROVING ANAEROBIC DIGESTIBILITY OF SLUDGE PRETREATED BY THERMAL HYDROLYSIS AND BANANA STRAW ADDED[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(5): 144-149. doi: 10.13205/j.hjgc.202005025
Citation: DENG Qing-hua, ZHANG Jian, XIAN-Ping, FANG Qing, MENG Zheng-cheng. IMPROVING ANAEROBIC DIGESTIBILITY OF SLUDGE PRETREATED BY THERMAL HYDROLYSIS AND BANANA STRAW ADDED[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(5): 144-149. doi: 10.13205/j.hjgc.202005025
shu

IMPROVING ANAEROBIC DIGESTIBILITY OF SLUDGE PRETREATED BY THERMAL HYDROLYSIS AND BANANA STRAW ADDED

doi: 10.13205/j.hjgc.202005025

  • 1. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;

  • 2. Guangxi Zhuang Autonomous Region Government Investment Project Evaluation Center, Nanning 530022, China;

  • 3. College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China;

  • 4. College of Resources, Environment and Materials, Guangxi University, Nanning 530004, China

  • Received Date: 2019-09-23
    Abstract
  • The anaerobic biodegradability and methane yield of the low organic municipal sludge could be significantly improved on anaerobic co-digestion, by combing banana straw with high temperature thermal hydrolysis pretreatment (HTHP). In the combining system of anaerobic co-digestion and HTHP, the methane yield of municipal sludge, banana straw and their mixture were 388, 372, 537mL/gVS, respectively, which showed the significant synergistic effect. In their own optimal pretreatment condition of sludge, banana straw and their mixture, the T80 was 12, 19, 17 days, respectively, which could be represented as hydraulic retention time of anaerobic digestion; SCOD dissolution ratio was respectively 14.4, 2.8, and 5.9 times of those before pretreatment; SCOD removal rate was 93.7%, 89.8% and 94.5% after anaerobic digestion, and the removal rate of VS was 48.4%, 48.8% and 59.2%, respectively. The concentration of soluble protein, VFA and soluble polysaccharide were increased significantly, which was 14.5, 5.1 and 8.2 times of that before HTTP, and the removal rate was 94.4%, 94.9% and 95.2% in the subsequent anaerobic digestion stage, which was slightly higher than single treatment.
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