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Hu Z, Li J, Qian J, Liu J, Zhou W. Efficacy and mechanisms of rotating algal biofilm system in remediation of soy sauce wastewater. BIORESOURCE TECHNOLOGY 2024; 406:131047. [PMID: 38942212 DOI: 10.1016/j.biortech.2024.131047] [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: 04/30/2024] [Revised: 06/19/2024] [Accepted: 06/25/2024] [Indexed: 06/30/2024]
Abstract
This study investigated the efficacy of the rotating algal biofilm (RAB) for treating soy sauce wastewater (SW) and its related treatment mechanisms. The RAB system demonstrated superior nutrient removal (chemical oxygen demand, ammonium nitrogen, total nitrogen, and phosphorus for 92 %, 94 %, 91 %, and 82 %, respectively) and biofilm productivity (14 g m-2 d-1) at optimized 5-day harvest time and 2-day hydraulic retention time. This was mainly attributed to the synergistic interactions within the algae-fungi (Apiotrichum)-bacteria (Acinetobacter and Rhizobia) consortium, which effectively assimilated certain extracellular polymeric substances into biomass to enhance algal biofilm growth. Increased algal productivity notably improved protein and essential amino acid contents in the biomass, suggesting a potential for animal feed applications. This study not only demonstrates a sustainable approach for managing SW but also provides insight into the nutrient removal and biomass conversion, offering a viable strategy for large-scale applications in nutrient recovery and wastewater treatment.
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Affiliation(s)
- Zimin Hu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang 330031, China
| | - Jingjing Li
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang 330031, China; Center for Algae Innovation & Engineering Research, Nanchang University, Nanchang 330031, China; School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China
| | - Jun Qian
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang 330031, China; Center for Algae Innovation & Engineering Research, Nanchang University, Nanchang 330031, China.
| | - Jin Liu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang 330031, China; Center for Algae Innovation & Engineering Research, Nanchang University, Nanchang 330031, China
| | - Wenguang Zhou
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang 330031, China; Center for Algae Innovation & Engineering Research, Nanchang University, Nanchang 330031, China.
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Wang X, Zhu H, Wang B, Yan B. Optimizing fertilizer usage for source reduction of salt and fluoride ion runoff discharge from a soda saline-alkali paddy field. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 364:121489. [PMID: 38889648 DOI: 10.1016/j.jenvman.2024.121489] [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: 02/28/2024] [Revised: 06/11/2024] [Accepted: 06/12/2024] [Indexed: 06/20/2024]
Abstract
Planting rice is a beneficial strategy for improving soda saline-alkali soil, but it comes with the challenge of increased runoff discharge of salt and fluoride (F-) ions. The use of different nitrogen (N) fertilizers can impact this ion discharge, yet the specific characteristics of ion runoff under different N-fertilizer applications remain unclear. A field experiment was conducted in this study, applying five commonly used N-fertilizer types to monitor the ion runoff throughout an entire rice growing season. Salt ions and F- runoff discharge was significantly affected by N-fertilizer type, runoff event, and their interaction (p < 0.001). Regardless of N-fertilizer types, sodium (Na+) and bicarbonate (HCO3-) ions were consistently discharged from runoff in soda saline-alkali fields, constituting 20.55-25.06 % and 47.57-50.49 % of total ion discharges, respectively. Compared to no N-fertilizer (CK) and other N-fertilizer treatments, the organic-inorganic compound fertilizer (OCF) application significantly reduced Na+ and HCO3- runoff discharge, causing a decrease in the competitive adsorption capacity between HCO3- and F- (p < 0.05). The use of OCF and inorganic compound fertilizer (ICF) lowered pH in runoff water, resulting in reduced dissolution capacity of calcium fluoride in the soil and thereby decreasing total F- runoff discharge. In conclusion, OCF proves to be an effective N-fertilizer in mitigating salt ions and F- runoff discharge in soda saline-alkali paddy fields. Additionally, ICF demonstrates the ability to control F- runoff discharge.
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Affiliation(s)
- Xinyi Wang
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130102, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hui Zhu
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Changchun 130102, China.
| | - Bin Wang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
| | - Baixing Yan
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Changchun 130102, China
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Song H, Li J, Su Q, Li H, Guo X, Shao S, Fan L, Xu P, Zhou W, Qian J. Insight into the mechanism of nitrogen sufficiency conversion strategy for microalgae-based ammonium-rich wastewater treatment. CHEMOSPHERE 2024; 349:140904. [PMID: 38070604 DOI: 10.1016/j.chemosphere.2023.140904] [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: 09/03/2023] [Revised: 11/09/2023] [Accepted: 12/03/2023] [Indexed: 01/10/2024]
Abstract
The strategy of nitrogen sufficiency conversion can improve ammonium nitrogen (NH4+-N) removal with microalgal cells from ammonium-rich wastewater. We selected and identified one promising isolated algal strain, NCU-7, Chlorella sorokiniana, which showed a high algal yield and tolerance to ammonium in wastewater, as well as strong adaptability to N deprivation. The transition from N deprivation through mixotrophy (DN, M) to N sufficiency through autotrophy (SN, P) achieved the highest algal yields (optical density = 1.18 and 1.59) and NH4+-N removal rates (2.5 and 4.2 mg L-1 d-1) from synthetic wastewaters at two NH4+-N concentrations (160 and 320 mg L-1, respectively). Algal cells in DN, M culture obtained the lowest protein content (20.6%) but the highest lipid content (34.0%) among all cultures at the end of the stage 2. After transferring to stage 3, the lowest protein content gradually recovered to almost the same level as SN, P culture on the final day. Transmission electron microscopy and proteomics analysis demonstrated that algal cells had reduced intracellular protein content but accumulated lipids under N deprivation by regulating the reduction in synthesis of protein, carbohydrate, and chloroplast, while enhancing lipid synthesis. After transferring to N sufficiency, algal cells accelerated their growth by recovering protein synthesis, leading to excessive uptake of NH4+-N from wastewater. This study provides specific insights into a nitrogen sufficiency conversion strategy to enhance algal growth and NH4+-N removal/uptake during microalgae-based ammonium-rich wastewater treatment.
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Affiliation(s)
- Hanwu Song
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Jingjing Li
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Qihui Su
- Xinjiang Rao River Hydrological and Water Resources Monitoring Center, Shangrao, 334000, China
| | - Hongwu Li
- Faculty of Science and Engineering, Soka University, Tokyo, 1928577, Japan
| | - Xujie Guo
- Nanchang Environmental Science Research Institute Co., Ltd, Nanchang, 330031, China
| | - Shengxi Shao
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Liangliang Fan
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Peilun Xu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Wenguang Zhou
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang, 330031, China.
| | - Jun Qian
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang, 330031, China.
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Song H, Li J, Zhou M, Li H, Fan L, Xu P, Shao S, Li J, Xu C, Zhou W, Qian J. Improving algal growth in an anaerobic digestion piggery effluent by fungal pretreatment: Process optimization, the underlying mechanism of fungal decolorization, and nitrogen removal. CHEMOSPHERE 2023; 337:139416. [PMID: 37414296 DOI: 10.1016/j.chemosphere.2023.139416] [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: 04/20/2023] [Revised: 06/26/2023] [Accepted: 07/02/2023] [Indexed: 07/08/2023]
Abstract
Anaerobic digestion piggery effluent (ADPE) shows high chromaticity and ammonium levels, severely inhibiting algal growth. Fungal pretreatment has great potential for decolorization and nutrient removal from wastewater, which coupled with microalgal cultivation may be a reliable strategy for sustainable ADPE resource utilization. In this study, we selected and identified two locally isolated eco-friendly fungal strains for ADPE pretreatment, and fungal culture conditions were optimized for decolorization and ammonium nitrogen (NH4+-N) removal. Subsequently, the underlying mechanisms of fungal decolorization and nitrogen removal were investigated, and the feasibility of using pretreated ADPE for algal cultivation was explored. The results showed that two fungal strains were identified as Trichoderma harzianum and Trichoderma afroharzianum, respectively, presenting good growth and decolorization performance for ADPE pretreatment. The optimized culture conditions were as follows: 20% ADPE, 8 g L-1 glucose, initial pH 6, 160 rpm, 25-30 °C, and 0.15 g L-1 initial dry-weight. ADPE decolorization was mainly caused by fungal biodegradation of color-related humic substances through manganese peroxidase secretion. The removed nitrogen was completely converted into fungal biomass as nitrogen assimilated, ca. 90% of which was attributed to NH4+-N removal. The pretreated ADPE significantly improved algal growth and nutrient removal, demonstrating the feasibility of developing an eco-friendly fungi-based pretreatment technology.
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Affiliation(s)
- Hanwu Song
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Jun Li
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Mi Zhou
- Xinjiang Rao River Hydrological and Water Resources Monitoring Center, Shangrao, 334000, China
| | - Hongwu Li
- Faculty of Science and Engineering, Soka University, Tokyo, 1928577, Japan
| | - Liangliang Fan
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Peilun Xu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Shengxi Shao
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Jingjing Li
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Chengyu Xu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources & Environment, Nanchang University, Nanchang, 330031, China
| | - Wenguang Zhou
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources & Environment, Nanchang University, Nanchang, 330031, China.
| | - Jun Qian
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources & Environment, Nanchang University, Nanchang, 330031, China.
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Qian J, Xu C, Song H, Zhou W, Toda T, Li H, Takayama Y, Sekine M, Koga S, Li J, Liu J. Enhancing algal growth and nutrient recovery from anaerobic digestion piggery effluent by an integrated pretreatment strategy of ammonia stripping and flocculation. Front Bioeng Biotechnol 2023; 11:1219103. [PMID: 37456717 PMCID: PMC10339316 DOI: 10.3389/fbioe.2023.1219103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 05/23/2023] [Indexed: 07/18/2023] Open
Abstract
Anaerobic digestion piggery effluent (ADPE) with a quite high ammonium (NH4 +) concentration and turbidity (dark brown color) generally requires high dilution before microalgae cultivation, owing to its NH4 + toxicity and color inhibition to algal growth. An integrated pretreatment strategy of ammonia stripping and chemical flocculation may be a more practical pretreatment procedure for enhancing algae yield and nutrient recovery from anaerobic digestion piggery effluent. In this study, we determined the optimum pretreatment strategy of anaerobic digestion piggery effluent for subsequent microalgae cultivation and nutrient recovery. The results showed that the integrated anaerobic digestion piggery effluent pretreatment strategy of high-temperature ammonia stripping and chemical flocculation at a mixed dosage of 2 g L-1 polyaluminum chloride (PAC) and 40 mg L-1 cationic polyacrylamide (C-PAM), and 50 mg L-1 ammonium nitrogen (NH4 +-N) enrichment provided maximum algal yield (optical density = 1.8) and nutrient removal (95.2%, 98.7%, 99.3%, and 78.5% for the removal efficiencies of total nitrogen, NH4 +-N, total phosphorus, and chemical oxygen demand, respectively) from anaerobic digestion piggery effluent. The integrated pretreatment strategy is expected to become a more practical pretreatment procedure for enhancing algae yield and nutrient recovery from anaerobic digestion piggery effluent.
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Affiliation(s)
- Jun Qian
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources and Environment, Nanchang University, Nanchang, China
| | - Chengyu Xu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources and Environment, Nanchang University, Nanchang, China
| | - Hanwu Song
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources and Environment, Nanchang University, Nanchang, China
| | - Wenguang Zhou
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources and Environment, Nanchang University, Nanchang, China
| | - Tatsuki Toda
- Faculty of Science and Engineering, Soka University, Tokyo, Japan
| | - Hongwu Li
- Faculty of Science and Engineering, Soka University, Tokyo, Japan
| | - Yoshiki Takayama
- Faculty of Science and Engineering, Soka University, Tokyo, Japan
| | - Mutsumi Sekine
- Faculty of Science and Engineering, Soka University, Tokyo, Japan
| | - Shinichi Koga
- Faculty of Science and Engineering, Soka University, Tokyo, Japan
| | - Jun Li
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources and Environment, Nanchang University, Nanchang, China
| | - Jin Liu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources and Environment, Nanchang University, Nanchang, China
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Enhancing biomass yield, nutrient removal, and decolorization from soy sauce wastewater using an algae-fungus consortium. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zhang S, Zhang L, Xu G, Li F, Li X. A review on biodiesel production from microalgae: Influencing parameters and recent advanced technologies. Front Microbiol 2022; 13:970028. [PMID: 35966657 PMCID: PMC9372408 DOI: 10.3389/fmicb.2022.970028] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 07/12/2022] [Indexed: 12/17/2022] Open
Abstract
Microalgae are the important part of carbon cycle in the nature, and they could utilize the carbon resource in water and soil efficiently. The abilities of microalgae to mitigate CO2 emission and produce oil with a high productivity have been proven. Hence, this third-generation biodiesel should be popularized. This review firstly introduce the basic characteristics and application fields of microalgae. Then, the influencing parameters and recent advanced technologies for the microalgae biodiesel production have been discussed. In influencing parameters for biodiesel production section, the factors of microalgae cultivation, lipid accumulation, microalgae harvesting, and lipid extraction have been summarized. In recent advanced technologies for biodiesel production section, the microalgae cultivation systems, lipid induction technologies, microalgae harvesting technologies, and lipid extraction technologies have been reviewed. This review aims to provide useful information to help future development of efficient and commercially viable technology for microalgae-based biodiesel production.
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Affiliation(s)
- Shiqiu Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, China
- School of Geography and Environment, Shandong Normal University, Jinan, China
| | - Lijie Zhang
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, China
- *Correspondence: Lijie Zhang,
| | - Geng Xu
- School of Geography and Environment, Shandong Normal University, Jinan, China
| | - Fei Li
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, China
| | - Xiaokang Li
- School of Environmental and Material Engineering, Yantai University, Yantai, China
- Xiaokang Li,
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Enhancing algal growth and nutrient removal from nitrified anaerobic digestion piggery effluent through process optimization. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102746] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Enhancing Algal Yield and Nutrient Removal from Anaerobic Digestion Piggery Effluent by an Integrated Process-Optimization Strategy of Fungal Decolorization and Microalgae Cultivation. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12094741] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
The dark brown anaerobic digestion piggery effluent (ADPE) with a large amount of ammonium generally needs high dilution before microalgae cultivation due to its inhibiting effects on algal growth. Due to the strong decolorization of fungi by degrading organic compounds in wastewater, the process-optimization integrated strategy of fungal decolorization of ADPE and subsequent microalgae cultivation with ammonium-tolerant strain may be a more reliable procedure to reduce the dilution ratio and enhance algal biomass production, and nutrient removal from ADPE. This study determined a suitable fungal strain for ADPE decolorization, which was isolated and screened from a local biogas plant, and identified using 26s rRNA gene sequence analysis. Subsequently, ADPE was pretreated by fungal decolorization to make low-diluted ADPE suitable for the algal growth, and conditions of microalgae cultivation were optimized to achieve maximum algal yield and nutrient removal from the pretreated ADPE. The results showed one promising locally isolated fungal strain, Nanchang University-27, which was selected out of three candidates and identified as Lichtheimia ornata, presenting a high decolorization to ADPE through fungal pretreatment. Five-fold low-diluted ADPE pretreated by L. ornata was the most suitable medium for the algal growth at an initial concentration of ammonium nitrogen of 380 mg L−1 in all dilution treatments. Initial optical density of 0.3 and pH of 9.0 were optimal culture conditions for the algal strain to provide the maximum algal yield (optical density = 2.1) and nutrient removal (88%, 58%, 65%, and 77% for the removal rates of ammonium nitrogen, total nitrogen, total phosphorus, and chemical oxygen demand, respectively) from the pretreated ADPE. This study demonstrated that fungal decolorization and subsequent microalgae cultivation could be a promising approach to algal biomass production and nutrient removal from ADPE.
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Enhancement of ammonium removal from landfill leachate using microalgae by an integrated strategy of nutrient balance and trophic mode conversion. ALGAL RES 2022. [DOI: 10.1016/j.algal.2021.102572] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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