1
|
Sun Z, Li J, Wang X, Xia S, Zhao J. Enhanced heavy metal stabilization and phosphorus retention during the hydrothermal carbonization of swine manure by in-situ formation of MgFe 2O 4. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 174:96-105. [PMID: 38039939 DOI: 10.1016/j.wasman.2023.11.024] [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: 06/22/2023] [Revised: 10/15/2023] [Accepted: 11/22/2023] [Indexed: 12/03/2023]
Abstract
Hydrothermal carbonization is an efficient technique for the disposal of livestock manure, enabling its harmless treatment, quantity reduction, and resourceful utilization. Co-hydrothermal of modified materials facilitates the production of more valuable carbonaceous materials. However, further exploration is needed to understand their potential impact on the environmental risks associated with livestock manure disposal and the application of products derived from it. Therefore, the carbonization degree, heavy metals stabilization, and phosphorus retention during the hydrothermal treatment of swine manure were systematically investigated in this study under the influence of in-situ formed MgFe2O4. The results revealed that the in-situ formation of MgFe2O4 improved the dehydration and decarboxylation of organic components in swine manure, thereby improving its carbonization degree. Furthermore, both hydrothermal carbonization and MgFe2O4 modified hydrothermal carbonization resulted in an enhanced stabilization of heavy metals, leading to a significant reduction in their soluble/exchangeable fraction and reducible fraction. Phosphorus was predominantly retained in the hydrochars, with the highest retention rate reaching 88%, attributed to the significant decrease in soluble and exchangeable phosphorus fractions facilitated by the in-situ formation of MgFe2O4. Moreover, MgFe2O4 modified hydrochars exhibited remarkable adsorption capacity for Pb(II) and Cu(II) without any leaching of heavy metals. Overall, the findings indicated that the in-situ formation of MgFe2O4 positively influenced the hydrothermal of swine manure, improving certain economic benefits in its practical application.
Collapse
Affiliation(s)
- Zhenhua Sun
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Jing Li
- Shanghai Investigation, Design & Research Institute Co., Ltd, Shanghai 200050, PR China; YANGTZE Eco Environment Engineering Research Center, China Three Gorges Corporation, Beijing 100038, PR China
| | - Xuejiang Wang
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
| | - Siqing Xia
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Jianfu Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| |
Collapse
|
2
|
Kwapinska M, Pisano I, Leahy JJ. Hydrothermal carbonization of milk/dairy processing sludge: Fate of plant nutrients. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118931. [PMID: 37688960 DOI: 10.1016/j.jenvman.2023.118931] [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: 06/16/2023] [Revised: 08/24/2023] [Accepted: 09/02/2023] [Indexed: 09/11/2023]
Abstract
Dairy processing sludge (DPS) is a byproduct generated in wastewater treatment plants located in dairy (milk) processing companies (waste activated sludge). DPS presents challenges in terms of its management (as biosolids) due to its high moisture content, prolonged storage required, uncontrolled nutrient loss and accumulation of certain substances in soil in the proximity of dairy companies. This study investigates the potential of hydrothermal carbonization (HTC) for recovery of nutrients in the form of solid hydrochar (biochar) produced from DPS originating from four different dairy processing companies. The HTC tests were carried out at 160 °C, 180 °C, 200 °C and 220 °C, and a residence time of 1h. The elemental properties of hydrochars (biochars), the content of primary and secondary nutrients, as well as contaminants were examined. The transformation of phosphorus in DPS during HTC was investigated. The fraction of plant available phosphorus was determined. The properties of hydrochar (biochar) were compared against the European Union Fertilizing Products Regulation. The findings of this study demonstrate that the content of nutrient in hydrochars (biochars) meet the requirements for organo-mineral fertilizer with nitrogen and phosphorus as the declared nutrients (13.9-26.7%). Further research on plant growth and field tests are needed to fully assess the agronomic potential of HTC hydrochar (biochar).
Collapse
Affiliation(s)
- Marzena Kwapinska
- Dairy Processing Technology Centre, University of Limerick, Limerick, V94 T9PX, Ireland.
| | - Italo Pisano
- Department of Chemical Sciences, University of Limerick, Limerick, V94 T9PX, Ireland.
| | - James J Leahy
- Department of Chemical Sciences, Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland.
| |
Collapse
|
3
|
Khalaf N, Shi W, Fenton O, Kwapinski W, Leahy J. Hydrothermal carbonization (HTC) of dairy waste: effect of temperature and initial acidity on the composition and quality of solid and liquid products. OPEN RESEARCH EUROPE 2023; 2:83. [PMID: 37645300 PMCID: PMC10445854 DOI: 10.12688/openreseurope.14863.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/24/2023] [Indexed: 08/31/2023]
Abstract
Background: Hydrothermal carbonization (HTC) of dairy processing waste was performed to investigate the effect of temperature and initial pH on the yield and composition of the solid (hydrochar) and liquor produced. All hydrochars met the EU requirements of organo-mineral solid fertilizers defined in the Fertilizing Products Regulation in terms of phosphorus (P) and mineral content. Methods: Laboratory scale HTC was performed using pressurized reactors, and the products (solid and liquid) were collected, stored and analyzed for elemental composition and nutrient content using Inductively coupled plasma optical emission spectroscopy (ICP-OES), ultraviolet-visible spectrophotometry (UV-Vis) and other analytic techniques. Results: Maximum hydrochar yield (60.67%) was observed at T=180℃ and pH=2.25, whereas the maximum P-recovery was 80.38% at T=220℃ and pH=4.6. The heavy metal content of the hydrochars was mostly compliant with EU limitations, except for Ni at T=220℃ and pH=8.32. Meanwhile, further study of Chromium (Cr) species is essential to assess the fertilizer quality of the hydrochars. For the liquid product, the increase in temperature beyond 200℃, coupled with an increase in initial acidity (pH=2.25) drove P into the liquor. Simultaneously, increasing HTC temperature and acidity increased the concentration of NO 3 - and NH 4 + in the liquid products to a maximum of 278 and 148 mg/L, respectively, at T=180℃ and pH=4.6. Furthermore, no direct relation between final pH of liquor and NH 4 + concentration was observed. Conclusions: HTC allows for the production of hydrochar as a potential fertilizer material that requires further processing. Adjusting HTC conditions enhanced P-recovery in the hydrochar, while retrieving higher nitrate concentrations in the liquid product. Optimizing HTC for the production of qualified hydrochars requires further treatment of Cr content, studying the availability of P in the products and enhancing the hydrochar yield for economic feasibility.
Collapse
Affiliation(s)
- Nidal Khalaf
- Chemical and Environmental Science Department, University of Limerick, Limerick, Limerick, V94 T9PX, Ireland
| | - Wenxuan Shi
- Teagasc, Environmental Research Centre, Johnstown Castle, Co, Wexford, Y35 TC97, Ireland
| | - Owen Fenton
- Teagasc, Environmental Research Centre, Johnstown Castle, Co, Wexford, Y35 TC97, Ireland
| | - Witold Kwapinski
- Chemical and Environmental Science Department, University of Limerick, Limerick, Limerick, V94 T9PX, Ireland
| | - J.J. Leahy
- Chemical and Environmental Science Department, University of Limerick, Limerick, Limerick, V94 T9PX, Ireland
| |
Collapse
|
4
|
Zheng X, Ying Z, Feng Y, Wang B, Dou B. CaO-assisted hydrothermal treatment combined with incineration of sewage sludge: Focusing on phosphorus (P) fractions, P-bioavailability, and heavy metals behaviors. CHEMOSPHERE 2022; 308:136391. [PMID: 36096311 DOI: 10.1016/j.chemosphere.2022.136391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 08/23/2022] [Accepted: 09/06/2022] [Indexed: 06/15/2023]
Abstract
Dewatering of sewage sludge (SS) was the prerequisite for saving its drying energy and sustaining its stable combustion. Hydrothermal treatment (HT) has been a promising technology for improving SS dewaterability with high energy efficiency. However, the knowledge of phosphorus (P) transformation and heavy metals (HMs) behaviors in the combined HT and incineration process was still lack. P fractions, P-bioavailability, HMs speciation, and their environmental risk in the ash samples from this combination process were evaluated and compared with those from the co-incineration of SS and CaO. The combination process was superior to the latter one in the light of P and HMs. CaO preferred to enhance the transformation of non-apatite inorganic phosphorus (NAIP) to apatite phosphorus (AP) initially with enriched P and increased P-bioavailability in the resultant ash samples. The combination process further reduced the values of risk assessment code and individual contamination factor with the increment of the stable F4 fraction in HMs. Significant reduction of potential ecological risk was observed with the lowest global risk index of 43.76 in the combination process. Optimum CaO addition of 6% was proposed in terms of P and HMs. The work here can provide theoretical references for the potential utilization of P from SS to mitigate the foreseeable shortage of P rocks.
Collapse
Affiliation(s)
- Xiaoyuan Zheng
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China; Shanghai Key Laboratory of Heat Transfer and Multiphase Flow in Power Engineering, Shanghai, 200093, China
| | - Zhi Ying
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Yuheng Feng
- Thermal and Environment Engineering Institute, School of Mechanical Engineering, Tongji University, Shanghai, 200092, China.
| | - Bo Wang
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Binlin Dou
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| |
Collapse
|
5
|
Roy T, Dey TK, Jamal M. Microplastic/nanoplastic toxicity in plants: an imminent concern. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 195:27. [PMID: 36279030 PMCID: PMC9589797 DOI: 10.1007/s10661-022-10654-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 10/10/2022] [Indexed: 05/04/2023]
Abstract
The toxic impact of microplastics/nanoplastics (MPs/NPs) in plants and the food chain has recently become a top priority. Several research articles highlighted the impact of MPs/NPs on the aquatic food chain; however, very little has been done in the terrestrial ecosystem. A number of studies revealed that MPs/NPs uptake and subsequent translocation in plants alter plant morphological, physiological, biochemical, and genetic properties to varying degrees. However, there is a research gap regarding MPs/NPs entry into plants, associated factors influencing phytotoxicity levels, and potential remediation plans in terms of food safety and security. To address these issues, all sources of MPs/NPs intrusion in agroecosystems should be revised to avoid these hazardous materials with special consideration as preventive measures. Furthermore, this review focuses on the routes of accumulation and transmission of MPs/NPs into plant tissues, related aspects influencing the intensity of plant stress, and potential solutions to improve food quality and quantity. This paper also concludes by providing an outlook approach of applying exogenous melatonin and introducing engineered plants that would enhance stress tolerance against MPs/NPs. In addition, an overview of inoculation of beneficial microorganisms and encapsulated enzymes in soil has been addressed, which would make the degradation of MPs/NPs faster.
Collapse
Affiliation(s)
- Tapati Roy
- Department of Agronomy, Faculty of Agriculture, Khulna Agricultural University, Khulna, Bangladesh
- Micropastics Solution Ltd., Incubation Centre, KUET Business Park, Khulna, Bangladesh
| | - Thuhin K Dey
- Department of Leather Engineering, Faculty of Mechanical Engineering, Khulna University of Engineering & Technology, Khulna, 9203, Bangladesh
- Micropastics Solution Ltd., Incubation Centre, KUET Business Park, Khulna, Bangladesh
| | - Mamun Jamal
- Department of Chemistry, Faculty of Civil Engineering, Khulna University of Engineering & Technology, Khulna, 9203, Bangladesh.
- Micropastics Solution Ltd., Incubation Centre, KUET Business Park, Khulna, Bangladesh.
| |
Collapse
|
6
|
Chen G, Wang J, Yu F, Wang X, Xiao H, Yan B, Cui X. A review on the production of P-enriched hydro/bio-char from solid waste: Transformation of P and applications of hydro/bio-char. CHEMOSPHERE 2022; 301:134646. [PMID: 35436456 DOI: 10.1016/j.chemosphere.2022.134646] [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: 12/13/2021] [Revised: 04/09/2022] [Accepted: 04/14/2022] [Indexed: 06/14/2023]
Abstract
Phosphorus (P) is a necessary element for plant growth and animal health. Most P utilized by anthropogenic activities is released within the generation of various solid wastes such as sewage sludge, animal manure, and wetland plant, which increase the risk of water contamination. (Hydro)thermal treatment could be employed for solid waste treatment with the production of value-added hydro/bio-char, and the behavior of P during the thermochemical treatment process is critical for the further utilization of hydro/bio-char. This study provides a systematic review of the migration and transformation mechanisms of P during thermochemical treatment of various solid wastes, and special emphasis is given to the potential applications of P-enriched hydro/bio-char. Future challenges and perspectives in the thermal treatment of P-enriched solid waste are presented as well. The distribution and speciation of P were affected by feedstock properties, thermal technique, and reaction conditions, correspondingly affecting hydro/bio-char applications. The derived P-enriched hydro/bio-char was mainly applied as an agricultural soil amendment, P recovery source, and heavy metal sorbent, which could be adjusted by varying treatment process parameters. Additionally, potentially toxic substances, such as heavy metals in the solid waste, should be addressed during the production and application of hydro/bio-char. Overall, the production of P-enriched hydro/bio-char from solid waste is a promising route to simultaneously achieve P reclamation and solid waste treatment.
Collapse
Affiliation(s)
- Guanyi Chen
- School of Environmental Science and Engineering/ Tianjin Key Lab of Biomass Waste Utilization, Tianjin University, Tianjin, 300072, China; School of Mechanical Engineering, Tianjin University of Commerce, Tianjin, 300134, China
| | - Junxia Wang
- School of Environmental Science and Engineering/ Tianjin Key Lab of Biomass Waste Utilization, Tianjin University, Tianjin, 300072, China
| | - Fan Yu
- School of Environmental Science and Engineering/ Tianjin Key Lab of Biomass Waste Utilization, Tianjin University, Tianjin, 300072, China
| | - Xutong Wang
- School of Environmental Science and Engineering/ Tianjin Key Lab of Biomass Waste Utilization, Tianjin University, Tianjin, 300072, China
| | - Hui Xiao
- Tianjin Academy of Agricultural Sciences, Tianjin, 300192, China
| | - Beibei Yan
- School of Environmental Science and Engineering/ Tianjin Key Lab of Biomass Waste Utilization, Tianjin University, Tianjin, 300072, China
| | - Xiaoqiang Cui
- School of Environmental Science and Engineering/ Tianjin Key Lab of Biomass Waste Utilization, Tianjin University, Tianjin, 300072, China
| |
Collapse
|