Combined Aerobic Fermentation of Maricultural and Agricultural Solid Waste: Physicochemical Property and Bacterial Community Structure

Yalikun Tudi, Lanlan Pan, Xinjian Du, Biyue Liu, Xiuchen Li, Fuying Zheng and Qian Zhang ()
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Yalikun Tudi: College of Mechanical and Power Engineering, Dalian Ocean University, Dalian 116023, China
Lanlan Pan: College of Mechanical and Power Engineering, Dalian Ocean University, Dalian 116023, China
Xinjian Du: College of Mechanical and Power Engineering, Dalian Ocean University, Dalian 116023, China
Biyue Liu: College of Mechanical and Power Engineering, Dalian Ocean University, Dalian 116023, China
Xiuchen Li: College of Mechanical and Power Engineering, Dalian Ocean University, Dalian 116023, China
Fuying Zheng: College of Mechanical and Power Engineering, Dalian Ocean University, Dalian 116023, China
Qian Zhang: College of Mechanical and Power Engineering, Dalian Ocean University, Dalian 116023, China

Sustainability, 2024, vol. 16, issue 10, 1-12

Abstract: The large-scale production of maricultural solid waste is not used effectively and has a significant impact on the environment. However, there is no report on the utilization of solid waste in mariculture of maricultural and agricultural solid waste. At present, aerobic composting is a simple and feasible means of waste resource utilization, but it also seriously pollutes the environment. This paper studied the change of physical and chemical properties (T1: solid waste + straw, T2: solid waste + cow dung + straw, T3: solid waste + cow dung + straw + 5% biochar, T4: solid waste + chicken dung + cow dung + straw + 5% biochar) and microbial succession in the composting process (T4: solid waste + chicken dung + cow dung + straw + 5% biochar) and the effect of decomposed products on seed growth. The results showed that the mixed compost of various materials had a good regulating effect on the physical and chemical indexes, and the highest temperature could reach 69.4 °C. Biochar could extend the high temperature period by 1–2 days. The germination indexes of seeds treated with T1–T4 were 75%, 80%, 81%, and 94%, respectively. Through the change of the seed germination index, it could be seen that the bacterial community structure changed significantly during composting. The Chao 1 index and Shannon index showed that the bacterial abundance and diversity index increased and then decreased. The analysis of the bacterial community structure showed that Proteobacteria and Acinetobacter were the main bacteria in composting, and the relative abundance of Proteobacteria was 81.9% at the phyla level. Acinetobacter and Pseudoxanthomonas were the main bacteria in the process of composting. Acinetobacter was the dominant bacteria in the heating stage, with an abundance of 67.2%.

Keywords: maricultural solid waste; agricultural solid waste; aerobic fermentation; physical and chemical properties; bacterial (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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