Characterization and nutritional value of hydrothermal liquid products from distillers grains. (15th August 2022)

• Record Type: Journal Article
• Authors: Xu, Qingya; Liu, Taoze; Liu, Bangyu; Cheng, Hongguang; Yang, Cheng; Wang, Bing; Zimmerman, Andrew R.; Gao, Bin
• Is Part Of: Journal of environmental management. Volume 316(2022)
• Publication Date: 2022-08-15
• Subjects: Distillers grains -- Hydrothermal liquid products -- Hydrothermal treatment -- Nutrients; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2022.115275
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: Hydrothermal liquid products (HLPs) produced by hydrothermal treatment (HTT) contain a large amount of nitrogen, phosphorus and other substances, while the environmental problems caused by arbitrary discharge. This work explored the effects of temperature, reaction time and solid-liquid ratio on the chemistry of HLPs of two different distillers grains, with a focus on nutrient composition. Increased HTT temperature was related to increased HLPs pH, dissolved organic carbon content, and aromaticity, and decreased electrical conductivity. Maximum nutrient extraction efficiencies observed for NH4 + -N, NO3 − -N and PO4 3− were 92.0, 89.9, and 94.3%, respectively. Response surface methodology showed that the release of nutrient extraction efficiency was the greatest at the hydrothermal treatment of 200 °C for 1 h, and using a solid/liquid ratio of 10%. Comparative studies, the nutritional value of HLPs are appropriate for use as an agricultural fertilizer, and its use as a substitute for synthetic fertilizers could increase the sustainability and profitability of farming. Graphical abstract: Image 1 Highlights: Nutritional value of HLPs was discussed. Different reaction conditions on the nutrients of HLPs was investigated. Identify the optimal HLPs nutrients recovery conditions based on RSM. HLPs are nutrient-rich and can serve as nutrient solution to plant growth.