1
|
Fang Y, Li Z, Wang G, Xia Y, Zhang K, Gong W, Yu E, Xie W, Li H, Tian J, Xie J, Xu Q. Effects of two fillers and process conditions on the water treatment efficiency of a continuous packed bed biofilm reactor. Lett Appl Microbiol 2024; 77:ovae060. [PMID: 38955379 DOI: 10.1093/lambio/ovae060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 05/23/2024] [Accepted: 07/01/2024] [Indexed: 07/04/2024]
Abstract
This study evaluated the treatment efficiency of two selected fillers and their combination for improving the water quality of aquaculture wastewater using a packed bed biofilm reactor (PBBR) under various process conditions. The fillers used were nanosheet (NS), activated carbon (AC), and a combination of both. The results indicated that the use of combined fillers and the hydraulic retention time (HRT) of 4 h significantly enhanced water quality in the PBBR. The removal rates of chemical oxygen demand, NO2-─N, total suspended solids(TSS), and chlorophyll a were 63.55%, 74.25%, 62.75%, and 92.85%, respectively. The microbiota analysis revealed that the presence of NS increased the abundance of microbial phyla associated with nitrogen removal, such as Nitrospirae and Proteobacteria. The difference between the M1 and M2 communities was minimal. Additionally, the microbiota in different PBBR samples displayed similar preferences for carbon sources, and carbohydrates and amino acids were the most commonly utilized carbon sources by microbiota. These results indicated that the combination of NS and AC fillers in a PBBR effectively enhanced the treatment efficiency of aquaculture wastewater when operated at an HRT of 4 h. The findings provide valuable insights into optimizing the design of aquaculture wastewater treatment systems.
Collapse
Affiliation(s)
- Yijing Fang
- College of Life Science, Huzhou Normal University, Huzhou 313000, China
- Nation Local Joint Engineering Laboratory of Aquatic Animal Genetic Breeding and Nutrition, Zhejiang Provincial Key Laboratory of Aquatic Bioresource Conservation and Development Technology, Huzhou 313000, China
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
| | - Zhifei Li
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou 510380, China
| | - Guangjun Wang
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou 510380, China
| | - Yun Xia
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou 510380, China
| | - Kai Zhang
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou 510380, China
| | - Wangbao Gong
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou 510380, China
| | - Ermeng Yu
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou 510380, China
| | - Wenping Xie
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou 510380, China
| | - Hongyan Li
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou 510380, China
| | - Jingjing Tian
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou 510380, China
| | - Jun Xie
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
- Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou 510380, China
| | - Qiyou Xu
- College of Life Science, Huzhou Normal University, Huzhou 313000, China
- Nation Local Joint Engineering Laboratory of Aquatic Animal Genetic Breeding and Nutrition, Zhejiang Provincial Key Laboratory of Aquatic Bioresource Conservation and Development Technology, Huzhou 313000, China
| |
Collapse
|
2
|
Lian Y, Zheng X, Xie S, A D, Wang J, Tang J, Zhu X, Shi B. Microbiota composition and correlations with environmental factors in grass carp ( Ctenopharyngodon idella) culture ponds in South China. PeerJ 2023; 11:e15892. [PMID: 37846307 PMCID: PMC10576968 DOI: 10.7717/peerj.15892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/23/2023] [Indexed: 10/18/2023] Open
Abstract
To maintain the health of aquaculture fish, it is critical to understand the composition of microorganisms in aquaculture water and sediment and the factors affecting them. This study examined the water and sediment microbiota compositions of four different types of ponds in South China that were used to culture grass carp (Ctenopharyngodon idella) of different sizes through high-throughput sequencing of the 16S rRNA gene, and analyzed their correlations with environmental factors. The results showed that ponds with cultured grass carp of different sizes exhibited significant differences in terms of water physicochemical properties and composition of water and sediment microbiota. Furthermore, the exchange of microorganisms between water and sediment microbiota was lowest in ponds with the smallest grass carp and highest in ponds with the largest grass carp. All detected environmental factors except water temperature were significantly correlated with the water microbiota, and all detected environmental factors in the sediment were correlated with sediment microbiota. Moreover, Aeromonas hydrophila and Vibrio were significantly increased in the water microbiota, especially in ponds with small juvenile grass carp, implying an increased risk of A. hydrophila and Vibrio infections in these environments. Our results provide useful information for the management of grass carp aquaculture ponds.
Collapse
Affiliation(s)
- Yingli Lian
- Key Laboratory of Microecological Resources and Utilization in Breeding Industry, Ministry of Agriculture and Rural Affairs, Guangzhou, Guangdong, China
- Institute of hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei, China
- Guangdong Haid Group Co., Ltd, Guangzhou, Guangdong, China
| | - Xiafei Zheng
- Ninghai Institute of Mariculture Breeding and Seed Industry, Zhejiang Wanli University, Ningbo, Zhejiang, China
| | - Shouqi Xie
- Institute of hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei, China
| | - Dan A
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, China
| | - Jian Wang
- Key Laboratory of Microecological Resources and Utilization in Breeding Industry, Ministry of Agriculture and Rural Affairs, Guangzhou, Guangdong, China
- Guangdong Haid Group Co., Ltd, Guangzhou, Guangdong, China
| | - Jiayi Tang
- Key Laboratory of Microecological Resources and Utilization in Breeding Industry, Ministry of Agriculture and Rural Affairs, Guangzhou, Guangdong, China
- Guangdong Haid Group Co., Ltd, Guangzhou, Guangdong, China
| | - Xuan Zhu
- Guangdong Haid Group Co., Ltd, Guangzhou, Guangdong, China
| | - Baojun Shi
- Key Laboratory of Microecological Resources and Utilization in Breeding Industry, Ministry of Agriculture and Rural Affairs, Guangzhou, Guangdong, China
- Guangdong Haid Group Co., Ltd, Guangzhou, Guangdong, China
| |
Collapse
|
3
|
Kashem AHM, Das P, AbdulQuadir M, Khan S, Thaher MI, Alghasal G, Hawari AH, Al-Jabri H. Microalgal bioremediation of brackish aquaculture wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 873:162384. [PMID: 36841414 DOI: 10.1016/j.scitotenv.2023.162384] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/02/2023] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
Rapid aquaculture industry development contributed to a major increase in aquaculture wastewater generation. In the context of a circular economy, aquaculture wastewater treatment should simultaneously recover nutrients from the wastewater. Among many treatment methods, bioremediation using microalgae could be a cost-effective and environmentally friendly system that can be applied to treat aquaculture wastewater and simultaneously produce high-value microalgal biomass. This study explored the feasibility of treating brackish wastewater (0.8 % NaCl) generated from a Qatari commercial tilapia farm by microalgae. At first, 10 strains were grown using wastewater from the local farm in an indoor experiment. Based on nitrogen assimilation, biomass yield, biomass quality, and ease of harvesting, 4 candidate strains (Haematococcus sp., Neochloris sp., Monoraphidium sp., and Nostoc sp.) were shortlisted for outdoor growth experiments. Although Nostoc sp. could not grow outdoor in the wastewater, the other three strains were able to assimilate at least 70.5 % of the total nitrogen in the wastewater. Haematococcus sp. and Neochloris sp. could be harvested using self-settling, whereas Monoraphidium required an energy-intensive tangential flow filtration membrane process. Hence, the overall energy requirement for bioremediation, including biomass dewatering, for Haematococcus sp., Neochloris sp., and Monoraphidium sp. were determined as 0.64, 0.78, and 5.68 MJ/m3, respectively. Neochloris sp. had almost twice the biomass yield compared to Haematococcus sp. - suggesting that Neochloris sp. could be a potential candidate for aquaculture wastewater treatment.
Collapse
Affiliation(s)
- Abdurahman Hafez Mohammed Kashem
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713 Doha, Qatar; Department of Civil and Architectural Engineering, College of Engineering, Qatar University, 2713 Doha, Qatar
| | - Probir Das
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713 Doha, Qatar.
| | - Mohammad AbdulQuadir
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713 Doha, Qatar
| | - Shoyeb Khan
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713 Doha, Qatar
| | - Mahmoud Ibrahim Thaher
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713 Doha, Qatar
| | - Ghamza Alghasal
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713 Doha, Qatar
| | - Alaa H Hawari
- Department of Civil and Architectural Engineering, College of Engineering, Qatar University, 2713 Doha, Qatar
| | - Hareb Al-Jabri
- Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713 Doha, Qatar; Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, 2713 Doha, Qatar
| |
Collapse
|
4
|
Wang S, Zuo Z, Wang Q, Zhou A, Wang G, Xu G, Zou J. Replacing starch with resistant starch (Laminaria japonica) improves water quality, nitrogen and phosphorus budget and microbial community in hybrid snakehead (Channa maculata ♀ × Channa argus ♂). WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2023; 95:e10836. [PMID: 36744448 DOI: 10.1002/wer.10836] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/30/2022] [Accepted: 01/07/2023] [Indexed: 06/18/2023]
Abstract
It is essential to increase the use of carbohydrates as an energy source and improve protein synthesis and utilization to reduce ammonia nitrogen emissions. A 60-day cultural experiment was conducted to assess the impact of resistant starch (kelp meal, Laminaria japonica) replacing starch on water quality, nitrogen and phosphorus budget and microbial community of hybrid snakehead. Approximately 1350 experimental fish (11.4 ± 0.15 g) were randomly divided into control group (C, 20% starch) and four resistant starch groups: low replacement group (LR, 15% starch), medium replacement group (MR, 10% starch), high replacement group (HR, 5% starch) and full replacement group (FR, 0% starch). The crude protein and crude fat content of hybrid snakehead fish fed with the FR diet had the most significant improvement (P < 0.05). However, resistant starch also increased the effectiveness of nitrogen and phosphorus utilization in hybrid snakeheads, which decreased the proportion of total nitrogen and total phosphorus in tail water. The minimum nitrogen and phosphorus emission rate was when the starch level was 6.1%. Denitrifying microbes including Gemmobacter, Rhodobacter, Emticicia and Bosea have become much more prevalent in group FR (P < 0.05). In general, replacing starch with resistant starch can enhance the rate at which nitrogen and phosphorus are used in feeding, lessening water pollution and altering environmental microbial composition. PRACTITIONER POINTS: Resistant starch (RS) improves whole fish nutritional content. Resistant starch improves dietary nitrogen and phosphorus utilization. Resistant starch acts as a carbon source and encourages the colonization of denitrifying bacteria in water.
Collapse
Affiliation(s)
- Shaodan Wang
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Zhiheng Zuo
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Qiujie Wang
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Aiguo Zhou
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Guiqin Wang
- Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Key Laboratory of Animal Production, Product Quality and Security, Jilin Provincial Key Laboratory of Animal Nutrition and Feed Science, College of Animal Science and Technology, Jilin Agriculture University, Changchun, China
| | - Guohuan Xu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Jixing Zou
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| |
Collapse
|
5
|
Shi BS, Cheng XJ, Chen HZ, Xie J, Zhou ZH, Jiang SQ, Peng XM, Zhang YD, Zhu DT, Lu ZY. Occurrence, source tracking and removal of antibiotics in recirculating aquaculture systems (RAS) in southern China. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 324:116311. [PMID: 36162319 DOI: 10.1016/j.jenvman.2022.116311] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 09/03/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
The recirculating aquaculture system (RAS) has attracted much attention in China as a way to rapidly transform and upgrade aquaculture ponds to realize zero-emissions of pollutants in aquaculture tail water. Tail water purification ponds (TWPPs) play an important role in the treatment of aquaculture wastewater. However, until now, there have been few reports on the occurrence of antibiotics in RAS and the removal of antibiotics from the TWPPs of RAS. Therefore, this study focused on the occurrence of antibiotics in a typical ecological RAS. For comparison, the same measurements were simultaneously carried out in nearby open aquaculture ponds and rivers. The pollution level and spatial distribution of antibiotics in the RAS and the removal of antibiotics in the TWPPs were explored. The results showed that (1) eleven and twelve antibiotics were detected in water and sediment samples in the RAS, respectively, but no antibiotics were found in fish muscles and feed. Erythromycin (ERY), lincomycin (LIN), and ciprofloxacin (CFX) were the three main types of antibiotics found in water and sediment samples. (2) The TWPPs of the RAS can effectively remove antibiotics in aquaculture water. The antibiotic concentration in recirculating aquaculture ponds of the RAS was as high as 180 ng/L. After treatments in the TWPPs, the antibiotic concentration of aquaculture water decreased to 81.6 ng/L (3) The antibiotic concentrations in recirculating aquaculture ponds (25.2-180 ng/L) were lower than those in the nearby open aquaculture ponds (126-267.3 ng/L), and the concentration of antibiotics in the sediments of recirculating aquaculture ponds was up to 22.9 ng/g, while that in TWPPs was as high as 56.1 ng/g. In conclusion, the antibiotic residues in the RAS were low after antibiotics were banned in feed in China, and the removal of antibiotics in the TWPPs was more pronounced. Furthermore, cross-contamination was found between the RAS, surrounding open aquaculture ponds and the river, and the water supply of the RAS was likely to be the main contributor of antibiotics in the aquaculture environments. This study can help the government formulate discharge standards for antibiotics in aquaculture and also provide a reference for the transformation and upgrading of aquaculture ponds to achieve a zero-emission aquaculture mode.
Collapse
Affiliation(s)
- Bao-Shan Shi
- School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510641, China; State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, 510640, China
| | - Xiang-Ju Cheng
- School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510641, China; State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, 510640, China.
| | - Hong-Zhan Chen
- Guangzhou Ecological and Environmental Monitoring Center of Guangdong Province, Guangzhou, 510030, China
| | - Jun Xie
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Zhi-Hong Zhou
- Guangzhou Ecological and Environmental Monitoring Center of Guangdong Province, Guangzhou, 510030, China
| | - Shen-Qiong Jiang
- School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510641, China
| | - Xiao-Ming Peng
- School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510641, China
| | - Yu-da Zhang
- School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510641, China
| | - Dan-Tong Zhu
- School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510641, China; State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, 510640, China
| | - Zhuo-Yin Lu
- School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510641, China
| |
Collapse
|
6
|
Utilization of unconventional water resources (UWRS) for aquaculture development in arid and semi-arid regions – a review. ANNALS OF ANIMAL SCIENCE 2022. [DOI: 10.2478/aoas-2022-0069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Today, increase of world’s population and climate change has resulted in the reduction of fresh water resources and the increase of arid and semi-arid areas, and thus, it is necessary to find a new solution to increase the production of food resources. Aquaculture is one of the sources of food production, which can play a key role in fighting poverty and hunger. Sustainable aquaculture is strongly dependents on water quantity and quality, and also, optimal fish production can be determined by the physical, chemical and biological quality of water. Due to the current restrictions and the global increase in demand for aquatic products, unconventional waters (UWs) have been used in aquaculture. UWs include: recycled water, sewage, saline water, agricultural drains and water resulting from the process of sweetening and desalination of salty water. Today, these water resources have been used to grow all kinds of aquatic animals to provide food and protein. Considering the limited water resources in the world, the use of UWs is very effective and efficient in managing drought, and is considered as one of the ways to develop food production for humans. Due to its importance in areas facing water scarcity, the use of UWRs to supplement or replace the use of conventional fresh water sources has been considered. In this review study, the importance of UWs and their sources, aquaculture products and aquatics that can be cultivated with the help of UWs are discussed.
Collapse
|
7
|
Burzio C, Ekholm J, Modin O, Falås P, Svahn O, Persson F, van Erp T, Gustavsson DJI, Wilén BM. Removal of organic micropollutants from municipal wastewater by aerobic granular sludge and conventional activated sludge. JOURNAL OF HAZARDOUS MATERIALS 2022; 438:129528. [PMID: 35999740 DOI: 10.1016/j.jhazmat.2022.129528] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 06/02/2022] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
Removal performances of organic micropollutants by conventional activated sludge (CAS) and aerobic granular sludge (AGS) were investigated at a full-scale wastewater treatment plant. Lab-scale kinetic experiments were performed to assess the micropollutant transformation rates under oxic and anoxic conditions. Transformation rates were used to model the micropollutant removal in the full-scale processes. Metagenomic sequencing was used to compare the microbial communities and antimicrobial resistance genes of the CAS and AGS systems. Higher transformation ability was observed for CAS compared to AGS for most compounds, both at the full-scale plant and in the complementary batch experiments. Oxic conditions supported the transformation of several micropollutants with faster and/or comparable rates compared to anoxic conditions. The estimated transformation rates from batch experiments adequately predicted the removal for most micropollutants in the full-scale processes. While the compositions in microbial communities differed between AGS and CAS, the full-scale biological reactors shared similar resistome profiles. Even though granular biomass showed lower potential for micropollutant transformation, AGS systems had somewhat higher gene cluster diversity compared to CAS, which could be related to a higher functional diversity. Micropollutant exposure to biomass or mass transfer limitations, therefore played more important roles in the observed differences in OMP removal.
Collapse
Affiliation(s)
- Cecilia Burzio
- Department of Architecture and Civil Engineering, Chalmers University of Technology, Gothenburg 41296, Sweden.
| | - Jennifer Ekholm
- Department of Architecture and Civil Engineering, Chalmers University of Technology, Gothenburg 41296, Sweden
| | - Oskar Modin
- Department of Architecture and Civil Engineering, Chalmers University of Technology, Gothenburg 41296, Sweden
| | - Per Falås
- Department of Chemical Engineering, Lund University, PO Box 124, Lund 22100, Sweden
| | - Ola Svahn
- Department of Environmental Science and Bioscience, Kristianstad University, Kristianstad 29139, Sweden
| | - Frank Persson
- Department of Architecture and Civil Engineering, Chalmers University of Technology, Gothenburg 41296, Sweden
| | - Tim van Erp
- Strömstad Municipality, Wastewater Treatment Plant Österröd, Strömstad 45233, Sweden
| | | | - Britt-Marie Wilén
- Department of Architecture and Civil Engineering, Chalmers University of Technology, Gothenburg 41296, Sweden
| |
Collapse
|
8
|
Ji B, Fan S, Liu Y. A continuous-flow non-aerated microalgal-bacterial granular sludge process for aquaculture wastewater treatment under natural day-night conditions. BIORESOURCE TECHNOLOGY 2022; 350:126914. [PMID: 35231593 DOI: 10.1016/j.biortech.2022.126914] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/20/2022] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
This study developed a continuous-flow non-aerated microalgal-bacterial granular tubular reactor for aquaculture wastewater treatment under natural day-night conditions. Results showed that daytime was favorable for ammonia removal while nighttime for nitrate removal. Over 99% of nitrite-N could be removed over the day-night cycles at a hydraulic retention time of 6 h. However, the phosphorus removal was found to be sensitive to the weather condition, ranging from 35.0% to 96.6%. It was also observed that dissolved oxygen produced by microalgae in daytime was sufficient for creating a 6-h aerobic condition in nighttime for sustaining heterotrophic activity. Chlorella and Leptolyngbya were identified as the most abundant algae related to weather changes. Metagenomics analysis revealed that the high nitrite removal relied mainly on nitrite reduction. These experimental findings offer new insights into the non-aerated microalgal-bacterial granular sludge for environmentally sustainable aquaculture wastewater treatment.
Collapse
Affiliation(s)
- Bin Ji
- Department of Water and Wastewater Engineering, Wuhan University of Science and Technology, Wuhan 430065, PR China.
| | - Siqi Fan
- Department of Water and Wastewater Engineering, Wuhan University of Science and Technology, Wuhan 430065, PR China
| | - Yu Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| |
Collapse
|
9
|
Zhang Y, Ji T, Jiang Y, Zheng C, Yang H, Liu Q. Long-term effects of three compound probiotics on water quality, growth performances, microbiota distributions and resistance to Aeromonas veronii in crucian carp Carassius auratus gibelio. FISH & SHELLFISH IMMUNOLOGY 2022; 120:233-241. [PMID: 34848306 DOI: 10.1016/j.fsi.2021.11.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/24/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Probiotics could promote the healthy growth of aquatic animals and have been widely used in aquaculture. However, the influence of high concentration compound probiotics on the aquatic animals has not been reported. In the present study, a compound probiotics was used in high-density culture of crucian carps under the condition of micro-water exchange. During nearly 7-weeks feeding experiment, the aquaculture water quality, growth performances, disease resistance and microbiota distributions of crucian carps were tested. Under the high concentrations of compound probiotics, the content of total ammonia nitrogen and nitrite were finally in a state of dynamic equilibrium. The body length and weight of crucian carps in the experimental group (E) was significantly higher than that in the recirculating group (R). The antioxidant enzymes in the intestines and gills of the E group including SOD, CAT, GSH and MDA, were significantly higher than those in R group. The mortality of crucian carps in E group was significantly lower after the immersion infection of Aeromonas veronii. The addition of compound probiotics significantly increased the number of microorganisms detected in the intestines and gills of crucian carps in E group. The bacteria including Firmicutes, Planctomycetes, Verrucomicrobiota at the phylum level in E group were higher than those in R group. At the genus level, these bacteria (Pirellula, Roseimicrobium, Malikia) were not only higher in E group water, but also significantly higher in the intestines and gills than R group. The results of present study systematically analyzed the impact of high-concentration probiotics on crucian carps breeding, and speculated genus Pirellula, Roseimicrobium, Malikia may be used as aquatic probiotics. The present study will provide a new idea for the green and sustainable development of aquaculture.
Collapse
Affiliation(s)
- Yingying Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Tongwei Ji
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Yinan Jiang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Chen Zheng
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Hui Yang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China.
| | - Qiuning Liu
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, School of Wetland, Yancheng Teachers University, Yancheng, 224007, China.
| |
Collapse
|
10
|
Removing Nutrients from Crab-Breeding Wastewater by a Floating Plant–Effective Microorganism Bed. WATER 2020. [DOI: 10.3390/w12123384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Effective microorganism treatment, a low-cost and remediation measure that with no secondary pollution, was conducted in aquaculture wastewater. Unfortunately, effective microorganism erosion caused by the momentum of water flow under in situ conditions limits the treatment effect. In the channel test, a floating plant bed coupled with the effective microorganism was used to treat crab-breeding wastewater. This study explored the effect of plant coverage and hydraulic loading on aquaculture wastewater purification in the floating plant bed–effective microorganism coupled system. The results show that the effect of the coupled treatment effect is much better than pure microorganism treatment. The pollutant degradation coefficient has a significantly positive correlation with the length of the floating plant bed. A plant coverage rate of 30% and effluent hydraulic loading of 1.0 m3/m2·day are optimum floating plant bed–effective microorganism test conditions. Once the coverage rate exceeded 30%, the increase in the CODMn removal efficiency was not clear. At the same time, the high plant coverage inhibited the oxygen capacity in the water body, which directly led to a decrease in the degradation ability of organic matter by the plant. The biology–ecology coupled technology proposed in this study overcame the shortcomings of the easy-to-lose effective microorganism during the traditional unfixed process and improved the stability of the processing system. It strengthened the crab-breeding wastewater remediation effect. For an in situ application, the artificial restoration system 1 km in length was efficient, and the discharge met the standard at the end of the river.
Collapse
|