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Chen Z, Yang S, Zhang L, Duan F. Degradative solvent extraction of cyanobacteria: From reaction kinetics to potential organic matter evolution mechanism. BIORESOURCE TECHNOLOGY 2023; 386:129547. [PMID: 37488019 DOI: 10.1016/j.biortech.2023.129547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/20/2023] [Accepted: 07/21/2023] [Indexed: 07/26/2023]
Abstract
This study proposed a new continuous lumped reaction kinetics model to accurately reveal the control mechanism of cyanobacteria at each stage of degradative solvent extraction and discussed the potential evolution mechanism of organic matter. Results showed that degradation solvent extraction successfully separated nitrogen and phosphorus from cyanobacteria. The solute has high carbon and volatile contents, is almost ash-free, and forms a phosphorus-rich residue. The lowest fitting degree of the continuous lumped reaction model kinetics was 94.5%, suggesting that this model worked well. The depolymerization of the residue dominated between 200 and 350 °C, whereas solute decomposition dominated at 400 °C. Nitrogen-containing compounds, which originate from protein decarboxylation or deamination to generate amides, are the main components of the solute, and amino acids react with reducing sugars to generate nitrogen heterocyclic compounds, which are useful for preparing nitrogen-containing chemicals.
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Affiliation(s)
- Zongqi Chen
- Engineering Technology-Research Center of Anhui Education Department for Energy Saving and Pollutant Control in Metallurgical Process, School of Energy and Environment, Anhui University of Technology, Maanshan 243002, Anhui Province, PR China
| | - Shoumeng Yang
- Engineering Technology-Research Center of Anhui Education Department for Energy Saving and Pollutant Control in Metallurgical Process, School of Energy and Environment, Anhui University of Technology, Maanshan 243002, Anhui Province, PR China
| | - Lihui Zhang
- Engineering Technology-Research Center of Anhui Education Department for Energy Saving and Pollutant Control in Metallurgical Process, School of Energy and Environment, Anhui University of Technology, Maanshan 243002, Anhui Province, PR China.
| | - Feng Duan
- Engineering Technology-Research Center of Anhui Education Department for Energy Saving and Pollutant Control in Metallurgical Process, School of Energy and Environment, Anhui University of Technology, Maanshan 243002, Anhui Province, PR China
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Wang R, Cao J, Zhu W, Lv Y. Integration of pre-precipitation optimizing performance of culture medium prepared from salvaged cyanobacterial slurry. CHEMOSPHERE 2023; 316:137805. [PMID: 36632957 DOI: 10.1016/j.chemosphere.2023.137805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 12/06/2022] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
Cyanobacterial slurry is a waste biomass produced in the remediation of eutrophic lakes; it is obtained in large volume and is difficult to treat, but it has the potential to be used as raw material for culture medium for oil-producing microalgae. In this study, three kinds of oil-producing microalgae were tested, including Chlorella vulgaris, Scenedesmus obliquus, and Nannochloropsis oculate. On the basis of the medium preparation method "hydrothermal oxidation + ultrafiltration," the pre-precipitation phenomenon induced by pH adjustment was implemented to modify the culture medium and improve its performance. Ammonia nitrogen and macromolecules (mainly humic substances) were found to possibly have a joint-influence mechanism upon microalgae. Pre-precipitation changed the nitrogen species distribution in the medium and lowered the concentration of macromolecules, which improved the ability of microalgae to use different forms of nitrogen. This promoted the growth of, and oil production by, the microalgae.
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Affiliation(s)
- Ruochen Wang
- College of Environment, Hohai University, Nanjing, 210098, China; Center for Taihu Basin, Institute of Water Science and Technology, Hohai University, Nanjing, 211111, China
| | - Jun Cao
- College of Environment, Hohai University, Nanjing, 210098, China; Center for Taihu Basin, Institute of Water Science and Technology, Hohai University, Nanjing, 211111, China; National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai University, Nanjing, 211111, China
| | - Wei Zhu
- College of Environment, Hohai University, Nanjing, 210098, China; Center for Taihu Basin, Institute of Water Science and Technology, Hohai University, Nanjing, 211111, China.
| | - Yi Lv
- College of Environment, Hohai University, Nanjing, 210098, China; Center for Taihu Basin, Institute of Water Science and Technology, Hohai University, Nanjing, 211111, China
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Lin TH, Wang DH, Zou H, Zheng Y, Fu SF. Effects of salvaged cyanobacteria content on larval development and feedstock humification during black soldier fly larvae (Hermetia illucens) composting. ENVIRONMENTAL RESEARCH 2022; 215:114401. [PMID: 36167112 DOI: 10.1016/j.envres.2022.114401] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 08/25/2022] [Accepted: 09/18/2022] [Indexed: 06/16/2023]
Abstract
Cyanobacteria salvage is widely used to deal with massive cyanobacterial blooms. Improper disposal of salvaged cyanobacteria would cause secondary pollution. Black soldier fly (Hermetia illucens) larvae (BSFL) can bio-convert organic wastes into larval biomass, which is rich in protein and lipid. This study evaluated the possibility of using BSFL composting for salvaged cyanobacteria treatment. Results showed that increasing salvaged cyanobacteria waste (CW) content (from 0 to 50%, dry weight basis) extended BSFL development time, e.g., BSFL fed with 50% CW needed 14 days more to finish development than Control (0% CW). The CW content (0-20%) in feeding substrates had no significant effect on BSFL body length and weight. Whereas further increase of CW content (from 20 to 50%) led to significant reductions in substrate-to-BSFL biomass conversion ratio, body size, body weight, and crude protein content of BSFL. Meanwhile, the presence of salvaged cyanobacteria in the feeding substrate reduced the degradation efficiency of feeding substrate. The dissolved organic matter (DOM) results demonstrated that the increased salvaged cyanobacteria content made it more difficult for BSFL to degrade the feeding substrate into simple organic matter and further into humic-like substances. Furthermore, salvaged cyanobacteria in feeding substrates affected the intestinal microbial community significantly. With 20% CW content in the feeding substrate, the relative abundance of Firmicutes decreased from 92.43 to 81.24%, while the relative abundance of Proteobacteria and Bacteroidetes increased from 4.10 to 2.93-8.75% and 7.51%, respectively. BSFL composting is feasible to convert salvaged cyanobacteria into insect biomass. However, the salvaged cyanobacteria content in the feeding substrate should be carefully controlled (e.g., less than 30%).
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Affiliation(s)
- Tian-Hui Lin
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu Province, 214122, PR China
| | - Dong-Hui Wang
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu Province, 214122, PR China
| | - Hua Zou
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu Province, 214122, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou, 215009, PR China.
| | - Yi Zheng
- Department of Grain Science and Industry, Kansas State University, 101C BIVAP, 1980 Kimball Avenue, Manhattan, KS, 66506, USA
| | - Shan-Fei Fu
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu Province, 214122, PR China; Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, NO. 189 Songling Road, Qingdao, 266101, PR China.
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Wang R, Zhu W, Zhao S, Cao J. Hydrothermal oxidation-precipitation method for recovering phosphorus from dewatered sludge and the mechanisms involved. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lin JY, Sri Wahyu Effendi S, Ng IS. Enhanced carbon capture and utilization (CCU) using heterologous carbonic anhydrase in Chlamydomonas reinhardtii for lutein and lipid production. BIORESOURCE TECHNOLOGY 2022; 351:127009. [PMID: 35304253 DOI: 10.1016/j.biortech.2022.127009] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/11/2022] [Accepted: 03/12/2022] [Indexed: 06/14/2023]
Abstract
Chlamydomonas reinhardtii is a model microalga that has a higher growth rate and produces high levels of lutein and lipids, but biomass production is limited. Carbonic anhydrase (CA) converts atmospheric CO2 to bicarbonate which is crucial for carbon-concentrating mechanism (CCM) in microalgae and boosts cell density. Therefore, C. reinhardtii harboring the heterologous CA from Mesorhizobium loti (MlCA) and Sulfurihydrogenibium yellowstonense (SyCA) were explored to increase CO2 capture and utilization (CCU) through different culture devices. Genetically modified C. reinhardtii was able to grow from mixotrophic to autotrophic conditions. Subsequently, biomass, lutein, and lipid were maximized to OD680 of 4.56, 21.32 mg/L and 672 mg/L using photo-bioreactor (PBR) with 5% CO2. Moreover, CO2 assimilation rate was 2.748 g-CO2/g-DCW and 2.792 g-CO2/g-DCW under mixotrophic and autotrophic conditions, respectively. The biomass accumulation correlated with CA activity. In addition, the transcript levels of major genes in metabolic pathways of lutein and lipid were dramatically increased.
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Affiliation(s)
- Jia-Yi Lin
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | | | - I-Son Ng
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
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Huo Y, Li Y, Guo W, Liu J, Yang C, Li L, Liu H, Song L. Evaluation of Cyanobacterial Bloom from Lake Taihu as a Protein Substitute in Fish Diet-A Case Study on Tilapia. Toxins (Basel) 2021; 13:735. [PMID: 34679028 PMCID: PMC8538822 DOI: 10.3390/toxins13100735] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 10/14/2021] [Accepted: 10/15/2021] [Indexed: 11/16/2022] Open
Abstract
The utility of cyanobacterial bloom is often hindered by concerns about the toxin content. Over three years of investigation, we found that the toxin content of cyanobacterial bloom in Lake Taihu was always low in June and higher in late summer and autumn. The findings enabled us to compare the effects of diets containing low and high toxic cyanobacterial blooms on the growth and consumption safety of tilapia. There were no negative effects on the growth of tilapia, and the muscle seemed to be safe for human consumption in the treatment of 18.5% low toxic cyanobacterial bloom. Therefore, limitations of the utilization of cyanobacterial biomass can be overcome by selecting low toxic cyanobacterial bloom that can be found and collected in large lakes.
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Affiliation(s)
- Yan Huo
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (Y.H.); (Y.L.); (W.G.); (J.L.); (C.Y.); (L.L.)
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuanze Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (Y.H.); (Y.L.); (W.G.); (J.L.); (C.Y.); (L.L.)
| | - Wei Guo
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (Y.H.); (Y.L.); (W.G.); (J.L.); (C.Y.); (L.L.)
| | - Jin Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (Y.H.); (Y.L.); (W.G.); (J.L.); (C.Y.); (L.L.)
| | - Cuiping Yang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (Y.H.); (Y.L.); (W.G.); (J.L.); (C.Y.); (L.L.)
| | - Lin Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (Y.H.); (Y.L.); (W.G.); (J.L.); (C.Y.); (L.L.)
| | - Haokun Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (Y.H.); (Y.L.); (W.G.); (J.L.); (C.Y.); (L.L.)
| | - Lirong Song
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (Y.H.); (Y.L.); (W.G.); (J.L.); (C.Y.); (L.L.)
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