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Article: Rotten banana powder: A waste-recycling alternative for external carbon source

Zhu, Zihan / Zhao, Youcai / Su, Lianghu / Zhou, Tao

Journal of cleaner production. 2022 Oct. 15, v. 371

2022

Abstract: Although rotten banana (RB) has been proved as a superior carbon source for denitrification, how to maintain its effectiveness while reduce the depressing transportation expenses deserves for more considerations. In this study, a modified carbon source- ... ...

Abstract	Although rotten banana (RB) has been proved as a superior carbon source for denitrification, how to maintain its effectiveness while reduce the depressing transportation expenses deserves for more considerations. In this study, a modified carbon source-RB powder (RBP) was prepared and utilized for treating nitrate in wastewater. Results indicated that RBP, equipped with rapid organic release and low residual properties, could achieve a maximum nitrate removal rate of 96.79% and inapparent nitrite accumulation with a denitrification rate higher than RB slurry. Supplementing RBP improved the long-term stability of sludge in the denitrification system while the dosage served as a promoting factor towards sludge dewatering performance but a limiting factor towards system stability. The breeding of unique bacteria was easily altered by increasing nitrate load, contributing to the combined denitrification via various microorganisms. Meanwhile, the phyla and genera related to denitrification and organic fermentation were effectively enriched by improving RBP dosage. Compared with RB slurry and sodium acetate, less denitrification cost would be obtained by RBP when the usage amount respectively exceeded 7.31 tons and 228.18–555.56 tons. All the results demonstrated that RBP would be selected as a more cost-efficient choice for denitrification in view of practical applications.
Keywords	bananas ; carbon ; cost effectiveness ; denitrification ; dewatering ; fermentation ; nitrates ; nitrites ; sludge ; slurries ; sodium acetate ; transportation ; wastewater
Language	English
Dates of publication	2022-1015
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0959-6526
DOI	10.1016/j.jclepro.2022.133646
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Effects of potassium persulfate on nitrogen loss and microbial community during cow manure and corn straw composting.

Mei, Juan / Li, Ben / Su, Lianghu / Zhou, Xiaojie / Duan, Enshuai

Bioresource technology

2022 Volume 363, Page(s) 127919

Abstract: Strong oxidants can reduce the emission of ... ...

Abstract	Strong oxidants can reduce the emission of NH
MeSH term(s)	Animals ; Cattle ; Composting ; Female ; Manure/microbiology ; Microbiota ; Nitrogen/analysis ; Oxidants ; Potassium Compounds ; Soil ; Sulfates ; Zea mays
Chemical Substances	Manure ; Oxidants ; Potassium Compounds ; Soil ; Sulfates ; potassium persulfate (6B86K0MCZC) ; Nitrogen (N762921K75)
Language	English
Publishing date	2022-09-08
Publishing country	England
Document type	Journal Article
ZDB-ID	1065195-0
ISSN	1873-2976 ; 0960-8524
ISSN (online)	1873-2976
ISSN	0960-8524
DOI	10.1016/j.biortech.2022.127919
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Article ; Online: Enhancement of anaerobic digestion from food waste via inert substances based on metagenomic analysis: Oxidative phosphorylation and metabolism.

Jiang, Xiupeng / Li, Zongsheng / Lin, Kunsen / Zhao, Youcai / Su, Lianghu / Wu, Tong / Zhou, Tao

Environmental research

2023 Volume 246, Page(s) 118033

Abstract: The application of anaerobic digestion (AD) in the treatment of food waste (FW) has become widespread. However, the presence of inert substances, such as bones, ceramics, and shells, within FW introduces a degree of uncertainty into the AD process. To ... ...

Abstract	The application of anaerobic digestion (AD) in the treatment of food waste (FW) has become widespread. However, the presence of inert substances, such as bones, ceramics, and shells, within FW introduces a degree of uncertainty into the AD process. To clarify this intricate issue, this study conducted an in-depth investigation into the influence of inert substances on AD. The results revealed that when inert substances were present at a concentration of 0.08 g/g VSS, methane productivity in the AD process was significantly augmented by 86%. Subsequent investigations suggested that this positive effect was primarily evident in various biochemical processes, including solubilization, hydrolysis acidification, methanogenesis, and the accumulation of extracellular polymeric substances. Metagenomic analysis showed that inert substances enhance the relative abundance of hydrolytic bacteria and have a pronounced impact on the relative abundance of hydrogenotrophic methanogens (Methanosarcina) and acetotrophic methanogens (Methanobacterium). Additionally, inert substances significantly increased the relative abundance of functional genes in oxidative phosphorylation, a pivotal pathway for ATP synthesis. Furthermore, inert substances had a substantial effect on the functional genes related to the metabolic pathways associated with methanogenesis (both hydrogenotrophic and acetotrophic). This comprehensive study shed light on the substantial impact of inert substances on the AD of food waste, contributing to an enhanced understanding of the underlying mechanisms of anaerobic fermentation.
MeSH term(s)	Anaerobiosis ; Food Loss and Waste ; Bioreactors ; Oxidative Phosphorylation ; Food ; Refuse Disposal ; Methane ; Sewage/microbiology
Chemical Substances	Food Loss and Waste ; Methane (OP0UW79H66) ; Sewage
Language	English
Publishing date	2023-12-28
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	205699-9
ISSN	1096-0953 ; 0013-9351
ISSN (online)	1096-0953
ISSN	0013-9351
DOI	10.1016/j.envres.2023.118033
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Article ; Online: Characteristics of leachate from refuse transfer stations in rural China

Xiang, Huiming / Cheng, Le / Liu, Weiye / Wang, Saier / Zhang, Yi / Su, Lianghu / Tan, Chaoqun / Li, Yuping

Environ Sci Pollut Res. 2023 Jan., v. 30, no. 2 p.3056-3069

2023

Abstract: The properties of leachate from refuse transfer stations (RTSs) in rural China were indefinite. In this study, a total of 14 leachate samples from RTSs in nine provinces of China were characterized for their pH, electric conductivity, chromaticity, ... ...

Abstract	The properties of leachate from refuse transfer stations (RTSs) in rural China were indefinite. In this study, a total of 14 leachate samples from RTSs in nine provinces of China were characterized for their pH, electric conductivity, chromaticity, concentration of organic substances, nitrogen distribution, volatile organic compounds (VOCs), organic phosphorous pesticide, and heavy metals. The structural composition of fluorescent dissolved organic matter (FDOM) was also determined. To evaluate the leachate pollution potential in this study, a leachate pollution index was derived and used. Chromium (Cr) was the most polluting heavy metal present in rural leachate. Ethanol and ethyl acetate were the most frequently detected VOCs at high concentrations. Three-dimensional fluorescence excitation-emission matrix spectra were used to characterize the FDOM. Three components, tryptophan (C₁), tyrosine-like (C₂), and humic acid– and fulvic acid–like (C₃) substances, were identified from all 14 samples. Tryptophan was the major component of FDOM and present in 45.7% of the samples by calculating the fluorescence intensity percentage, on average. Pearson correlations revealed that the fluorescence intensity of C₁ and C₃ was strongly related to soluble chemical oxygen demand and dissolved oxygen carbon, while C₂ had significant positive correlations with ammonia nitrogen and total phosphorus of the solid waste. This study provided detailed data and findings that could serve as a preliminary basis for broadening options for the treatment and management of leachate from rural RTSs in China.
Keywords	ammonium nitrogen ; carbon ; chemical oxygen demand ; chromium ; color ; dissolved organic matter ; dissolved oxygen ; electrical conductivity ; ethanol ; ethyl acetate ; fluorescence ; heavy metals ; leachates ; nitrogen ; pH ; pesticides ; phosphorus ; solid wastes ; total phosphorus ; tryptophan ; volatile organic compounds ; China
Language	English
Dates of publication	2023-01
Size	p. 3056-3069.
Publishing place	Springer Berlin Heidelberg
Document type	Article ; Online
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-022-22449-3
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Article ; Online: Effects of potassium persulfate on nitrogen loss and microbial community during cow manure and corn straw composting

Mei, Juan / Li, Ben / Su, Lianghu / Zhou, Xiaojie / Duan, Enshuai

Bioresource Technology. 2022 Nov., v. 363 p.127919-

2022

Abstract: Strong oxidants can reduce the emission of NH₃ during composting. But as a commonly used oxidant, the influence of persulfate on nitrogen transformation during composting is unclear. In this study, the effects of 0.3 %–1.2 % potassium persulfate (PS) on ... ...

Abstract	Strong oxidants can reduce the emission of NH₃ during composting. But as a commonly used oxidant, the influence of persulfate on nitrogen transformation during composting is unclear. In this study, the effects of 0.3 %–1.2 % potassium persulfate (PS) on nitrogen losses and microbial community during air-dried cow manure composting were investigated. The results showed that PS could reduce nitrogen losses compared to the control. This was because it decreased pH and the maximum NH₄⁺-N content of treatments, which was beneficial to nitrogen retention. In addition, Pseudoxanthomonas and Chelativorans were enriched compared to the control, which might be associated with NH₄⁺-N transformation and nitrogen fixation. Meanwhile, PS increased the abundance of thermophilic lignocellulose degrading bacteria, and 0.3 % and 0.6 % PS increased the maximum temperature and the duration of the thermophilic period. This study indicated that PS could reduce nitrogen losses in composting and greatly influence nitrogen transforming and lignocellulose degrading bacteria.
Keywords	Pseudoxanthomonas ; air drying ; corn straw ; cow manure ; lignocellulose ; microbial communities ; nitrogen ; nitrogen fixation ; nitrogen retention ; oxidants ; pH ; potassium persulfate ; temperature ; Aerobic composting ; Persulfate ; Bacterial community
Language	English
Dates of publication	2022-11
Publishing place	Elsevier Ltd
Document type	Article ; Online
ZDB-ID	1065195-0
ISSN	1873-2976 ; 0960-8524
ISSN (online)	1873-2976
ISSN	0960-8524
DOI	10.1016/j.biortech.2022.127919
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Article: Functional utilization of biochar derived from Tenebrio molitor feces for CO₂ capture and supercapacitor applications

Wang, Saier / Shi, Ying / Xiang, Huiming / Liu, Ru / Su, Lianghu / Zhang, Longjiang / Ji, Rongting

RSC advances. 2022 Aug. 15, v. 12, no. 35

2022

Abstract: Biochar has attracted great interest in both CO₂ capture and supercapacitor applications due to its unique physicochemical properties and low cost. Fabrication of eco-friendly and cost-effective biochar from high potential biomass Tenebrio molitor feces ... ...

Abstract	Biochar has attracted great interest in both CO₂ capture and supercapacitor applications due to its unique physicochemical properties and low cost. Fabrication of eco-friendly and cost-effective biochar from high potential biomass Tenebrio molitor feces can not only realize the functional application of waste, but also a potential way of future carbon capture and energy storage technology. In this study, a novel KOH activation waste-fed Tenebrio molitor feces biochar (TMFB) was developed and investigated in terms of CO₂ capture and electrochemical performance. When activated at 700 °C for 1 h, the specific surface area of the feces biochar (TMFB-700A) increased significantly from 232.1 to 2081.8 m² g⁻¹. In addition, well-developed pore distribution facilitates CO₂ capture and electrolyte diffusion. TMFB-700A can quickly adsorb a large amount of CO₂ (3.05 mol kg⁻¹) with excellent recycling performance. TMFB-700A also exhibited promising electrochemical performance (335.8 F g⁻¹ at 0.5 A g⁻¹) and was used as electrode material in a symmetrical supercapacitor. It provided a high energy density of 33.97 W h kg⁻¹ at a power density of 0.25 kW kg⁻¹ with 90.47% capacitance retention after 10 000 charge–discharge cycles. All the results demonstrated that TMFB could be a potential bifunctional material and provided valuable new insights for Tenebrio molitor feces high-value utilization.
Keywords	Tenebrio molitor ; biochar ; biomass ; capacitance ; carbon ; carbon dioxide ; cost effectiveness ; electrochemical capacitors ; electrochemistry ; electrodes ; electrolytes ; energy ; energy density ; feces ; storage technology ; surface area ; wastes
Language	English
Dates of publication	2022-0815
Size	p. 22760-22769.
Publishing place	The Royal Society of Chemistry
Document type	Article
ISSN	2046-2069
DOI	10.1039/d2ra03575h
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Article: Molecular transformation and composition flow of dissolved organic matter in four typical concentrated leachates from the multi-stage membrane system

Xiang, Yan / Wang, Hui / Su, Lianghu / Zhang, Ruina / Cao, Ruijie / Wang, Luochun / Lou, Ziyang

Journal of environmental management. 2022 May 15, v. 310

2022

Abstract: Concentrated leachate (CL), characterized with high content salts and compositional complexity of dissolved organic matter (DOM), is difficult to degrade. Understanding the CL from molecular insight level is the requirement for further disposal based on ... ...

Abstract	Concentrated leachate (CL), characterized with high content salts and compositional complexity of dissolved organic matter (DOM), is difficult to degrade. Understanding the CL from molecular insight level is the requirement for further disposal based on their components. Here, typical CL samples were collected from the multi-stage membrane separation process in a large-scale leachate plant, including nanofiltration (NF), primary ultrafiltration (PUF), secondary nanofiltration (SNF), and reverse osmosis (RO). More than 95% of DOM was removed from raw CL, of which about 3/4 flowed into PUFCL and 1/5 flowed into SNFCL. DOM with macro-molecular weight (>500 Da, 30.46%) and highly unsaturated compounds (double-bond equivalents >15) were detected in PUFCL. Nearly half of DOM was CHO-only compounds (42.04%) in SNFCL. PUFCL was abundant in heteroatom species with higher-order oxygen (O ≥ 10), which was coincident with the trend of humic substance distribution (humic substance >1/2). Based on these properties results, advanced oxidation processes, such as ozonation, might be the right process for SNFCL rich in heteroatom species with low-order oxygen (O < 10). Abundant disulfides (S₂O₂₋₆ classes, 20.19%) and monovalent salts existed in ROCL, which should be removed from the system. These findings might provide basic information for the treatment of CLs from different membranes.
Keywords	dissolved organic matter ; disulfides ; environmental management ; humic substances ; leachates ; nanofiltration ; oxidation ; oxygen ; ozonation ; reverse osmosis ; ultrafiltration
Language	English
Dates of publication	2022-0515
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	184882-3
ISSN	1095-8630 ; 0301-4797
ISSN (online)	1095-8630
ISSN	0301-4797
DOI	10.1016/j.jenvman.2022.114759
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Article ; Online: Functional utilization of biochar derived from

Wang, Saier / Shi, Ying / Xiang, Huiming / Liu, Ru / Su, Lianghu / Zhang, Longjiang / Ji, Rongting

RSC advances

2022 Volume 12, Issue 35, Page(s) 22760–22769

Abstract: Biochar has attracted great interest in both ... ...

Abstract	Biochar has attracted great interest in both CO
Language	English
Publishing date	2022-08-15
Publishing country	England
Document type	Journal Article
ISSN	2046-2069
ISSN (online)	2046-2069
DOI	10.1039/d2ra03575h
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Article ; Online: Molecular transformation and composition flow of dissolved organic matter in four typical concentrated leachates from the multi-stage membrane system.

Xiang, Yan / Wang, Hui / Su, Lianghu / Zhang, Ruina / Cao, Ruijie / Wang, Luochun / Lou, Ziyang

Journal of environmental management

2022 Volume 310, Page(s) 114759

Abstract	Concentrated leachate (CL), characterized with high content salts and compositional complexity of dissolved organic matter (DOM), is difficult to degrade. Understanding the CL from molecular insight level is the requirement for further disposal based on their components. Here, typical CL samples were collected from the multi-stage membrane separation process in a large-scale leachate plant, including nanofiltration (NF), primary ultrafiltration (PUF), secondary nanofiltration (SNF), and reverse osmosis (RO). More than 95% of DOM was removed from raw CL, of which about 3/4 flowed into PUFCL and 1/5 flowed into SNFCL. DOM with macro-molecular weight (>500 Da, 30.46%) and highly unsaturated compounds (double-bond equivalents >15) were detected in PUFCL. Nearly half of DOM was CHO-only compounds (42.04%) in SNFCL. PUFCL was abundant in heteroatom species with higher-order oxygen (O ≥ 10), which was coincident with the trend of humic substance distribution (humic substance >1/2). Based on these properties results, advanced oxidation processes, such as ozonation, might be the right process for SNFCL rich in heteroatom species with low-order oxygen (O < 10). Abundant disulfides (S
MeSH term(s)	Dissolved Organic Matter ; Filtration ; Humic Substances/analysis ; Oxidation-Reduction ; Ultrafiltration ; Water Pollutants, Chemical/analysis
Chemical Substances	Dissolved Organic Matter ; Humic Substances ; Water Pollutants, Chemical
Language	English
Publishing date	2022-02-26
Publishing country	England
Document type	Journal Article
ZDB-ID	184882-3
ISSN	1095-8630 ; 0301-4797
ISSN (online)	1095-8630
ISSN	0301-4797
DOI	10.1016/j.jenvman.2022.114759
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Article ; Online: Waste reclamation from municipal solid waste for the cost-efficient treatment of landfill leachate with a novel biological trickle reactor system.

Zhu, Zihan / Su, Lianghu / Zhang, Meilan / Lu, Lu / Wu, Tong / Zhou, Tao

The Science of the total environment

2022 Volume 865, Page(s) 161129

Abstract: Mature landfill leachate (MLL) would be a tough nut to crack, how to realize waste reclamation while deal with the intractable by-products deserves for more considerations. In this study, a novel system, equipped with two biological trickle reactors ... ...

Abstract	Mature landfill leachate (MLL) would be a tough nut to crack, how to realize waste reclamation while deal with the intractable by-products deserves for more considerations. In this study, a novel system, equipped with two biological trickle reactors developed by inert wastes and a connected organic feeder using waste-recycling rotten banana powder, was established for treating MLL. Results indicated that superior pollutant removal performance and long-term stability were achieved by this system, with only COD and TN concentrations slightly higher than the relevant standard limits. But the shortage about poor resistance to shock pollution loads, was underlined by the fluctuation of water quality. Anaerobic condition and carbon source supplementation contributed to more microbial similarities but less community richness and diversity among inert fillings, and the selective enrichment of denitrification and organic-degrading strains simultaneously occurred. The comparisons with common processes demonstrated that this system was a cost-efficient choice for MLL treatment.
MeSH term(s)	Solid Waste/analysis ; Water Pollutants, Chemical/analysis ; Bioreactors ; Health Care Costs ; Carbon ; Waste Disposal Facilities ; Refuse Disposal/methods
Chemical Substances	Solid Waste ; Water Pollutants, Chemical ; Carbon (7440-44-0)
Language	English
Publishing date	2022-12-29
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2022.161129
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