HIGH-SPEED TREATMENT OF FOOD WASTE BY CONTINUOUS HIGH-TEMPERATURE COMPOSTING ENHANCED BY THERMOPHILIC MICROBIAL CONSORTIUM

SONG Cai-hong; QI Hui; WEI Zi-min; XIA Xun-feng

doi:10.13205/j.hjgc.202105015

Volume 39 Issue 5

Jan. 2022

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SONG Cai-hong, QI Hui, WEI Zi-min, XIA Xun-feng. HIGH-SPEED TREATMENT OF FOOD WASTE BY CONTINUOUS HIGH-TEMPERATURE COMPOSTING ENHANCED BY THERMOPHILIC MICROBIAL CONSORTIUM[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 111-117,130. doi: 10.13205/j.hjgc.202105015

Citation:

SONG Cai-hong, QI Hui, WEI Zi-min, XIA Xun-feng. HIGH-SPEED TREATMENT OF FOOD WASTE BY CONTINUOUS HIGH-TEMPERATURE COMPOSTING ENHANCED BY THERMOPHILIC MICROBIAL CONSORTIUM[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 111-117,130. doi: 10.13205/j.hjgc.202105015

Citation:

SONG Cai-hong, QI Hui, WEI Zi-min, XIA Xun-feng. HIGH-SPEED TREATMENT OF FOOD WASTE BY CONTINUOUS HIGH-TEMPERATURE COMPOSTING ENHANCED BY THERMOPHILIC MICROBIAL CONSORTIUM[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 111-117,130. doi: 10.13205/j.hjgc.202105015

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HIGH-SPEED TREATMENT OF FOOD WASTE BY CONTINUOUS HIGH-TEMPERATURE COMPOSTING ENHANCED BY THERMOPHILIC MICROBIAL CONSORTIUM

doi: 10.13205/j.hjgc.202105015

1. Life Science College, Liaocheng University, Liaocheng 252000, China;
2. Chinese Research Academy of Environmental Science, Beijing 100012, China;
3. School of Life Sciences, Northeast Agricultural University, Harbin 150030, China

Received Date: 2020-08-05
Available Online: 2022-01-17

Abstract

Abstract

In order to further improve the disposing efficiency of continuous high-temperature composting disposing food waste, we obtained thermophilic microbial consortium (TMC) degrading organic matter efficiently, by screening and high-temperature domestication. Three treatments, including continuous high-temperature composting with (T1) and without TMC inoculation (T2) and natural composting (T3) were set. The influence of TMC inoculation on continuous high-temperature composting process was revealed by comparison of physical and chemical indexes, crude fat and protein content and GI index and analysis of dominant bacterial succession law. Results showed that the decreased levels of organic matter content, C/N, crude fat and protein content were all in order of T1>T2>T3 after composting. The above indicators were significantly different among T1, T2 and T3 (P<0.05). These results confirmed that inoculation of TMC could accelerate the continuous high-temperature composting process and improve composting efficiency. On the 14th day of composting, the GI was 110% and 99% in T1 and T2 treatment respectively, but that of T3 treatment was only 80%, indicating that the continuous high-temperature composting could accelerate the degradation of phytotoxic substances and significantly improve compost quality. TMC inoculation could further promote harm-free compost. PCR-DGGE results showed that the diversities of thermophilic or heat-resistant bacteria and heat-resistant lignocellulose-degrading bacteria increased remarkably in T1 and T2 treatment. At the same time, mesophilic lignocellulose-degrading bacterial diversity did not decrease. Two kinds of bacteria cooperated to achieve faster degradation of lignocellulose, which was helpful in shortening food waste composting process. In conclusion, TMC inoculation could significantly improve the efficiency of continuous high-temperature composting and food waste compost quality.
- thermophilic microbial consortium,
- continuous high-temperature,
- high-speed composting,
- food waste

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References(25)

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