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Wu H, Xing Z, Zhan G. Dissolved oxygen drives heterotrophic microorganism succession to regulate low carbon source wastewater treatment enhanced by slurry. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 366:121804. [PMID: 38996606 DOI: 10.1016/j.jenvman.2024.121804] [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: 03/27/2024] [Revised: 07/04/2024] [Accepted: 07/07/2024] [Indexed: 07/14/2024]
Abstract
The limited availability of carbon sources in low carbon source wastewater has always hindered nitrogen removal efficiency. The residual slurry liquid after anaerobic digestion has the potential to be used as a carbon source. This study investigated the optimal parameters of dissolved oxygen (DO) for enhancing the treatment of low carbon source wastewater using slurry, and revealed the characteristics of carbon metabolism gene enrichment and carbon fixation potential driven by DO. The results indicated that treating wastewater under high DO concentrations (3-4 mg/L) conditions could meet the emission standards set by wastewater treatment plants in China. However, the lower-cost DO concentration of 3 mg/L is considered a more cost-effective parameter, effectively removing 85.68% of chemical oxygen demand and 91.56% of total nitrogen. Mechanistic analysis suggested that reducing DO concentration increased the diversity of microbial communities. Regulating DO concentration reshaped the co-metabolic network of microorganisms with different DO sensitivities by influencing Hydrogenophaga and Chlorobium. This ultimately led to the reconstruction of heterotrophic microbial communities dominated by Sphaerotilus and Acidovorax under high DO conditions, and heterotrophic-autotrophic co-enriched microbial communities dominated by Chlorobium under low DO conditions (1-2 mg/L). Additionally, under high DO conditions, high microbial mass transfer efficiency and the enrichment of functional genes were crucial for achieving high nitrogen removal performance. Further, the microbial carbon fixation potential was relatively high under the DO 3 mg/L condition, helping to reduce the consumption of additional carbon sources. This study provided innovative ideas for the sustainable and low-carbon development of wastewater treatment technology.
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Affiliation(s)
- Heng Wu
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
| | - Zhilin Xing
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, PR China.
| | - Guoqiang Zhan
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
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2
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Gui X, Wang Z, Li K, Li Z, Mao X, Geng J, Pan Y. Enhanced nitrogen removal in sewage treatment is achieved by using kitchen waste hydrolysate without a significant increase in nitrous oxide emissions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167108. [PMID: 37777127 DOI: 10.1016/j.scitotenv.2023.167108] [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: 06/26/2023] [Revised: 08/25/2023] [Accepted: 09/13/2023] [Indexed: 10/02/2023]
Abstract
Kitchen waste hydrolysate (KWH) is an effective replacement for commonly used carbon sources such as sodium acetate (NaAc) and glucose (Glu), in wastewater treatment plants (WWTPs) to enhance the total nitrogen (TN) removal efficiency in sewage and reduce the operating cost of WWTPs. However, KWH utilization introduces complex organic matter that may lead to increased nitrous oxide (N2O) emissions, compared with that of NaAc and Glu, causing significant damage to the atmosphere. Therefore, this study aims to compare the effects of KWH, Glu, and NaAc on N2O emissions in sewage treatment. The results indicated that KWH introduction did not lead to a significant increase in N2O emissions, with a conversion rate of only 5.61 %. Compared with raw sludge, the addition of only Glu and NaAc significantly increased the abundance of the nar G gene, indicating that the readily degradable carbon sources initiated denitrification at a faster rate than KWH. When KWH was added, there was a notable increase in the abundance of genes associated with partial nitrification and denitrification (nir K, hzo, and nos Z). In contrast, Glu and NaAc did not have a significant effect on the nos Z gene. The results suggested that KWH supplementation was more effective to reduce N2O to N2. Moreover, the KWH addition significantly increased the microbial diversity in the sludge and promoted the presence of shortcut nitrification and denitrification bacteria (Comamonadaceae) and denitrification bacteria (Rhodobacteraceae), further indicating the potential of KWH for enhanced denitrification and reduced N2O emissions. Overall, to the best of our knowledge, this is the first study that demonstrated KWH, as a novel and complex organic carbon source, can be safely used in sewage treatment processes to improve the pollutant removal efficiency without causing a significant increase in N2O emissions.
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Affiliation(s)
- Xuwei Gui
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China
| | - Zhengjiang Wang
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China
| | - Kaili Li
- School of chemical engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Zhenlun Li
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China.
| | - Xinyu Mao
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China
| | - Jinzhao Geng
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China
| | - Yan Pan
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China
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3
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Zhou M, Han Y, Zhuo Y, Dai Y, Yu F, Feng H, Peng D. Effect of thermal hydrolyzed sludge filtrate as an external carbon source on biological nutrient removal performance of A 2/O system. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 332:117425. [PMID: 36739777 DOI: 10.1016/j.jenvman.2023.117425] [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: 10/28/2022] [Revised: 01/17/2023] [Accepted: 01/29/2023] [Indexed: 06/18/2023]
Abstract
Thermal hydrolyzed sludge filtrate (THSF) rich in biodegradable organics could be a promising external carbon source for biological nutrient removal (BNR). The use of THSF can effectively reduce wastewater treatment plants operating costs and recover bioresources and bioenergy from the waste activated sludge. In this study, the effect of THSF on the BNR process was investigated using a lab-scale anaerobic/anoxic/oxic (A2/O) system. Total nitrogen (TN) and total phosphorus (TP) removal efficiencies of 74.26 ± 3.36% and 92.20 ± 3.13% at a 0.3% dosing ratio were achieved, respectively. Moreover, 20.42% of the chemical oxygen demand (COD) contained in THSF contributed to denitrification, enhancing nitrogen removal efficiency from 55.30 to 74.26%. However, the effluent COD increased by approximately 36.80%, due to 18.39% of the COD contained in THSF discharged with effluent. In addition, the maximum denitrification rate was approximately 16.01 mg N g VSS-1 h-1, while the nitrification rate was not significantly affected by THSF. Nitrosomonas, a common chemoautotrophic nitrifier, was not detected after the introduction of THSF. The aerobic denitrifier Rubellimicrobium was stimulated, and its relative abundance increased from 0.16 to 3.03%. Moreover, the relative abundance of Dechloromonas was 3.93%, indicating that the denitrifying phosphorus removal process was enhanced. This study proposes an engineering application route of THSF, and the chemical phosphate removal pretreatment might be a means to suppress the phosphate recirculation.
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Affiliation(s)
- Mengyu Zhou
- School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China
| | - Yun Han
- School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, PR China.
| | - Yang Zhuo
- School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, PR China
| | - Yang Dai
- School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China
| | - Fen Yu
- School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China
| | - Hao Feng
- School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China
| | - Dangcong Peng
- School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, PR China
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Guo H, Wang Y, Tian L, Wei W, Zhu T, Liu Y. Insight into the enhancing short-chain fatty acids (SCFAs) production from waste activated sludge via polyoxometalates pretreatment: Mechanisms and implications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 800:149392. [PMID: 34388643 DOI: 10.1016/j.scitotenv.2021.149392] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 07/25/2021] [Accepted: 07/28/2021] [Indexed: 05/21/2023]
Abstract
Polyoxometalates (POMs), a versatile and environmentally-friendly inorganic material, have been extensively studied and applied in chemical catalytic oxidation and biological nutrients removal processes. However, little is known about effects of POMs pretreatment on anaerobic sludge fermentation. This study thereby filled such knowledge gap and provided insights into the underlying mechanisms. Results demonstrated the maximal short-chain fatty acids (SCFAs) production increased by 6.18 times with POMs rising from 0 to 0.05 g/g TSS. Mechanistic investigations revealed that the oxidation stress of POMs as well as reactive oxygen species (ROS) activated by POMs were responsible for the disintegration of waste activated sludge (WAS). More importantly, POMs pretreatment improved the biodegradability of organics released, providing more biodegradable substrates for SCFAs generation. Furthermore, the inhibition of POMs to SCFAs producers was less severe than that to SCFAs consumers, leading to SCFAs accumulation. Microbial community analysis exhibited that increased the population of hydrolysis (i.e., Longilinea) and SCFAs generation microbes (i.e., Acinetobacter and Fusibacter). Further evaluation showed that the POMs-based technology is economically and environmentally attractive for the pretreatment of WAS. Finally, a "closed-loop" concept of the reutilization of renewable POMs may provide an important implication of WAS management in the future.
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Affiliation(s)
- Haixiao Guo
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China
| | - Yufen Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China
| | - Lixin Tian
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China
| | - Wei Wei
- School of Environment, Harbin Institute of Technology, Harbin 150090, P. R. China
| | - Tingting Zhu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China
| | - Yiwen Liu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China.
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5
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Gui X, Li Z, Wang Z. Kitchen waste hydrolysate enhances sewage treatment efficiency with different biological process compared with glucose. BIORESOURCE TECHNOLOGY 2021; 341:125904. [PMID: 34523554 DOI: 10.1016/j.biortech.2021.125904] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 08/28/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
Insufficient carbon source is the primary factor that limits biological nitrogen and phosphorus removal during sewage treatment. This study investigates the feasibility and biological process of kitchen waste hydrolysate (KWH) replacing glucose to improve pollutant removal efficiency. It was found that using KWH as carbon source achieved better removal effect than glucose during sewage treatment. And more than 96% of total nitrogen (TN), total phosphorus (TP), and the chemical oxygen demand were removed after 48 h of acclimation. Nitrogen and phosphorus introduced by adding KHW had no negative effect on the effluent quality. Compared with glucose, KWH decreased the diversity of bacteria and significantly promoted the accumulation of acid-producing bacteria (Propionibacterium) and denitrifying bacteria (Rhodobacteraceae). Moreover, KWH significantly improved the relative abundance of the amo A, nap A, and nos Z genes. This result further indicated that KWH was beneficial for denitrification and was a favorable external carbon source.
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Affiliation(s)
- Xuwei Gui
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, and College of Resources and Environment, Southwest University, Chongqing 400716, China
| | - Zhenlun Li
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, and College of Resources and Environment, Southwest University, Chongqing 400716, China.
| | - Zhengjiang Wang
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, and College of Resources and Environment, Southwest University, Chongqing 400716, China
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6
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Zhu Z, Guo Y, Zhao Y, Zhang R, Yu Y, Zhang M, Zhou T. Sewage denitrification performance and sludge properties variation with the addition of liquid from perishable organic anaerobic fermentation. BIORESOURCE TECHNOLOGY 2021; 341:125821. [PMID: 34523552 DOI: 10.1016/j.biortech.2021.125821] [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: 07/30/2021] [Revised: 08/15/2021] [Accepted: 08/17/2021] [Indexed: 06/13/2023]
Abstract
The organics in the classified wet waste were deficiently utilized while sewage denitrification requires abundant carbon sources. Herein, the fermentation of perishable organic waste (POW) and the denitrification process with obtained liquid were investigated. The most volatile fatty acids (VFAs) production was realized with the fermentation liquid of food waste (FL-FW). Increasing substrate tended to lower the proportion of VFAs and acetic acid in FL-FW. Under the optimum conditions of FL-FW carbon source, carbon to nitrogen ratio 7, and temperature 30 ℃, the removal efficiency of nitrate nitrogen reached 99.23% within 4 h. The sludge settleability and microbial activity were significantly enhanced, contributing to the actual sewage a promotional removal of organics (95.84%) and nitrogen (70.31%) with the supplementation of FL-FW. High addition ratio would cause more degradation of refractory organics, which confirmed the feasibility of using FL-FW as a cost-efficient carbon source for the denitrification.
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Affiliation(s)
- Zihan Zhu
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Yanyan Guo
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Youcai Zhao
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, 1515 North Zhongshan Rd. (No. 2), Shanghai 200092, China
| | - Ruina Zhang
- Shanghai Environmental Sanitation Engineering Design Institute Co., Ltd, Shanghai 200323, China
| | - Yi Yu
- Shanghai Environmental Sanitation Engineering Design Institute Co., Ltd, Shanghai 200323, China
| | - Meilan Zhang
- Shanghai Laogang Waste Disposal Co., Ltd, Shanghai 201300, China
| | - Tao Zhou
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, 1515 North Zhongshan Rd. (No. 2), Shanghai 200092, China.
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7
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Liu X, Wang B, Peng Y, Gong X, Gong Q, Li X. A novel strategy for enhancing the partial denitrification to treat domestic wastewater by feeding sludge fermentation liquid. BIORESOURCE TECHNOLOGY 2021; 330:124936. [PMID: 33761452 DOI: 10.1016/j.biortech.2021.124936] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 02/28/2021] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Partial-denitrification (PD; NO3-→NO2-) has recently been proposed to be a feasible choice of NO2--N supply for anammox bacteria. In this study, an aerobic/anoxic process for treating domestic wastewater was operated for 176 days to evaluate the feasibility of using sludge fermentation liquid for partial denitrification of the wastewater. Results show that, with the ratio of C/N (COD/ NO3--N) increased at anoxic stage, the average NO2--N concentration in the effluent and nitrate-to-nitrite transformation ratio (NTR) at anoxic stage showed relative growth. High-throughput sequencing analysis demonstrated that the enhancement of PD can be explained by the increases of Thauera, Paracoccus and Enterobacteriaceae. Moreover, Candidatus_Brocadia (0.13%) was detected as the predominant anammox bacteria. Ex-situ isotopic tracing technique analysis assessed that the ratio of anammox role (ra%) was 7.29%. This study has a great potential for being coupled with the anammox bacteria for advanced nitrogen removal.
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Affiliation(s)
- Xuefan Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Bo Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China.
| | - Xiaofei Gong
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Qingteng Gong
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
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8
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Onsite source separation and synergistic treatment of household food waste into wastewater. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118337] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Qi S, Lin J, Wang Y, Yuan S, Wang W, Xiao L, Zhan X, Hu Z. Fermentation liquid production of food wastes as carbon source for denitrification: Laboratory and full-scale investigation. CHEMOSPHERE 2021; 270:129460. [PMID: 33423004 DOI: 10.1016/j.chemosphere.2020.129460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/19/2020] [Accepted: 12/24/2020] [Indexed: 06/12/2023]
Abstract
Nitrogen removal is often limited in municipal wastewater treatment due to the insufficiency of carbon source, and using food wastes fermentation liquid as carbon source could cut down the cost of operating and recycle food wastes. Food wastes fermentation liquid production and application as external carbon source were explored in the laboratory and full-scale system in this study. In the laboratory scale, lactic acid and VFAs were the main components of fermentation liquid, and the highest total chemical oxygen demand (TCOD) production was obtained with activated sludge as inoculum. The yield of TCOD was around 794.5 mg/g TSfed and NH4+-N was 3.5 mg/g TSfed. The denitrification rate with fermentation liquid was slightly lower than acetic acid and butyric acid, but higher than lactic acid and starch. In the full-scale investigation, the TCOD concentration in fermentation liquid was in the range of 6.9-12.8 g/L and the ratio of TCOD/inorganic nitrogen was 210.5-504.5:1. NO3--N removal increased from 52.1% to 94.2% after fermentation liquid addition, confirming the potentiality of food wastes fermentation liquid replace the commercial carbon source in wastewater treatment plants.
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Affiliation(s)
- Shasha Qi
- School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China; Civil Engineering, College of Engineering and Informatics, National University of Ireland, Galway, Ireland
| | - Jinbiao Lin
- School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China; Hong Kong Hua Yi Design Consultants (S.Z.) LTD., Shenzhen, 518057, China
| | - Yulan Wang
- School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China.
| | - Shoujun Yuan
- School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Wei Wang
- School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Liwen Xiao
- Department of Civil, Structural and Environmental Engineering, Trinity College Dublin, Dublin 2, Ireland
| | - Xinmin Zhan
- Civil Engineering, College of Engineering and Informatics, National University of Ireland, Galway, Ireland
| | - Zhenhu Hu
- School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China; Anhui Provincial Engineering Laboratory for Rural Water Environment and Resources, Hefei University of Technology, Hefei, 230009, China.
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10
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Enhance biological nitrogen and phosphorus removal in wastewater treatment process by adding food waste fermentation liquid as external carbon source. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2020.107811] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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11
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Gao Y, Guo L, Shao M, Hu F, Wang G, Zhao Y, Gao M, Jin C, She Z. Denitrification performance evaluation and kinetics analysis with mariculture solid wastes (MSW) derived carbon source in marine recirculating aquaculture systems (RAS). BIORESOURCE TECHNOLOGY 2020; 313:123649. [PMID: 32559708 DOI: 10.1016/j.biortech.2020.123649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/02/2020] [Accepted: 06/05/2020] [Indexed: 06/11/2023]
Abstract
Biological denitrification using mariculture solid wastes (MSW) carbon source is a promising solution for removing nitrate (NO3--N) and disposing MSW in marine recirculating aquaculture systems (RAS). To enhance denitrification performance, heating (HT), rhamnolipid (RL), alkali (AL), thermophilic bacteria (TB) pre-treated MSW acidogenic fermentation effluents were prepared as carbon sources. Profiles of soluble organics in four types of fermentation effluents were first evaluated. The highest volatile fatty acids (VFAs) yield (52.1%) was obtained from TB treated MSW after acidification. RL and TB treated MSW acidogenic fermentation effluents showed high NO3--N removal efficiency (NRE) (around 97%). Acidogenic fermentation effluent from TB treated MSW presented a high biodegradability, with the minimum effluent chemical oxygen demand (COD) amount (35 mg/L). Denitrification kinetics parameters were also analyzed; high fraction (74.5%) of the most readily biodegradable organics (SS) demonstrated that TB treated MSW acidogenic fermentation effluent is a high-quality carbon source for enhancing denitrification.
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Affiliation(s)
- Yedong Gao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Liang Guo
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Laboratory of Marine Environmental and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
| | - Mengyu Shao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Fawen Hu
- Marine Biology Institute of Shandong Province, Qingdao 266104, China
| | - Guangce Wang
- Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Yangguo Zhao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Mengchun Gao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Chunji Jin
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Zonglian She
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
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12
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Wu Y, Cao J, Zhang T, Zhao J, Xu R, Zhang Q, Fang F, Luo J. A novel approach of synchronously recovering phosphorus as vivianite and volatile fatty acids during waste activated sludge and food waste co-fermentation: Performance and mechanisms. BIORESOURCE TECHNOLOGY 2020; 305:123078. [PMID: 32135351 DOI: 10.1016/j.biortech.2020.123078] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 02/21/2020] [Accepted: 02/22/2020] [Indexed: 06/10/2023]
Abstract
This research proposed an innovative approach to synchronously enhance the recovery of phosphorus (P) as vivianite and volatile fatty acids (VFAs) during waste activated sludge (WAS) and food waste (FW) co-fermentation. A high performance was achieved under 30% FW addition and pH uncontrolled, which gained 83.09% of TP recovery as high-purity vivianite (93.90%), together with efficient VFAs production (7671 mg COD/L). The FW supplement could enhance VFAs production and subsequently lower pH to contribute to the release of Fe2+ and PO43-. Also, it could dampen disrupting effects of strong acidic pH on microbial cells (lowering LDH release). Moreover, the flexible pH variation caused by biological acidification could maintain relatively higher microbial activities (increasing enzymes' activities), which was advantageous to the biological effects involved in Fe2+ and PO43 release and VFAs generation. Therefore, this research provide a promising and economic alternative to dispose of WAS and FW simultaneously for valuable resource recovery.
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Affiliation(s)
- Yang Wu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Jiashun Cao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China; Guohe Environmental Research Institute (Nanjing) Co., Ltd, Nanjing 211599, China
| | - Teng Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Jianan Zhao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Runze Xu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Qin Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Fang Fang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China; Guohe Environmental Research Institute (Nanjing) Co., Ltd, Nanjing 211599, China
| | - Jingyang Luo
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China; Guohe Environmental Research Institute (Nanjing) Co., Ltd, Nanjing 211599, China.
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