Article
Environmental Sciences
Qi Zhang, Qing Jiang, Yu Bai, Huashan Li, Jianliang Xue, Yu Gao, Dongle Cheng
Summary: A novel method of combined degradation of oily sludge by surfactants with activated-persulfate significantly improved the degradation efficiency, reaching the discharge standard. This study demonstrated a new avenue for the efficient and cost-effective treatment of oily sludge.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Mubarak Usman Kankia, Lavania Baloo, Nasiru Danlami, Wan Nurliyana Samahani, Bashar S. Mohammed, Sani Haruna, Ahmad Hussaini Jagaba, Mahmud Abubakar, Effa Affiana Ishak, Khalid Sayed, Noor Amila Bt Wan Zawawi
Summary: This study conducted a novel experimental method of manufacturing mortar by partially replacing cement with oily sludge ash (OSA) for civil construction. By analyzing the influence of OSA and water-to-cement (w/c) ratio on the behavior of mortar, the study found that the best mixture can be obtained by replacing 8.19 percent cement with OSA and using a w/c ratio of 0.52.
Article
Biotechnology & Applied Microbiology
H. Su, J. Lin
Summary: The study developed a method to improve oily sludge degradation rate by integrating subcritical hydrothermal pretreatment (SHP) and anaerobic digestion (AD). SHP converted macromolecular hydrocarbons in oily sludge into smaller molecules, facilitating microbial decomposition. The combination of SHP and AD processes promoted more efficient degradation of oily sludge compared to traditional single AD process.
JOURNAL OF APPLIED MICROBIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Mingzhu Yao, Yun Ma, Lu Liu, Chengrong Qin, Haibo Huang, Zhiwei Zhang, Chen Liang, Shuangquan Yao
Summary: In this study, the separation efficiency of oily sludge was analyzed using sodium lignosulfonate (SL) and sodium persulfate (S/D) treatment. The results showed that the oil removal efficiency was as high as 91.28%. This was achieved through adsorption solubilization and oxidative demulsification reactions, resulting in effective separation and recovery of oil from the sludge.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Green & Sustainable Science & Technology
HaiFeng Su, Jiafu Lin, QingYuan Wang
Summary: This study developed a novel clean production process for oily sludge, which successfully combined chemical and biological processes to achieve the simultaneous removal of organic pollutants and heavy metal contaminants from the sludge. The new NCP process not only reduced organic pollution in the sludge, but also significantly improved the removal rate of heavy metals.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Yang Liu, Zhihui Jiang, Jie Fu, Wenya Ao, Asif Ali Siyal, Chunbao Zhou, Chenglong Liu, Jianjun Dai, Mengyan Yu, Yingwen Zhang, Yajie Jin, Yanxin Yuan, Changfa Zhang
Summary: A single-step pyrolysis approach was developed to convert oily sludge with high iron content into a magnetic iron-char catalyst for organic dyes removal. The prepared catalyst showed favorable pore structures and high stability, allowing for effective and reusable degradation of dyes. This one-step pyrolysis method represents a promising approach to transform sludge waste into functional biochar that removes hazardous dyes.
Article
Engineering, Environmental
Fei Luo, Lile He, Ning He
Summary: The degradation characteristics of oily sludge in the bioreactor were studied using Euler-multiphase flow method. The new bioreactor showed significant improvement in degradation efficiency and energy consumption reduction compared to the conventional bioreactor.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Songjie Li, Guanghui Chen, Deshuang Yu, Yanling Qiu, Enhui Guo, Yiming Yu
Summary: This study investigated the performance of bioleaching technology for the treatment of oily sludge and removal of heavy metals. By using specific substrates and optimizing operating parameters, high reduction and removal rates for oily sludge and certain heavy metals were achieved.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Yihang Duan, Ningbo Gao, Cui Quan
Summary: In this study, a novel collaborative process (HCP treatment method) combining hydrothermal treatment and in situ pyrolysis was developed. The influences of hydrothermal temperature and pyrolysis temperature on the product distribution of OS were studied using a self-designed reactor. The results showed that the HCP treatment method achieved higher H2 production and increased content of olefins compared to traditional pyrolysis method. Energy consumption analysis also showed that the HCP treatment is a clean production process of OS with low energy consumption.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Agricultural Engineering
Pengfei Wan, Ying Liu, Quandi Zhang, Li Jiang, Heping Chen, Wenzhou Lv
Summary: Candida Tropicalis was used to improve the dewaterability of activated sludge (AS) by degrading EPS in AS, resulting in a decrease in protein, polysaccharide, and hydrophilic amino acids in EPS. The yeast degraded macromolecular organics into smaller molecular ones and direct addition of yeast to AS was more effective in EPS degradation. Addition of 0.75 g/L of wet yeast cells and 24 h of aeration enhanced the dewaterability of AS with a reduction in CST and MLSS. After 30 days of operation, lab-scale continuous SBRs reduced CST and MLSS of AS. FTIR spectroscopy showed a decrease in hydrophilic functional groups. This study presents a new approach for in-situ reduction of AS in wastewater treatment plants.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Yi-Fan Liu, Jing Chen, Zhong-Lin Liu, Zhao-Wei Hou, Bo Liang, Li-Ying Wang, Lei Zhou, Li-Bin Shou, Dan-Dan Lin, Shi-Zhong Yang, Jin-Feng Liu, Xiao-Lin Wu, Ji-Dong Gu, Bo-Zhong Mu
Summary: The microbial conversion of alkanes to methane in hydrocarbon-contaminated environments is an intrinsic bioremediation strategy. The mechanism of this process is still unclear. Integrated metagenomic and metatranscriptomic analyses reveal the roles of different microorganisms in alkane degradation and suggest the importance of H2-dependent methylotrophic methanogenesis in the carbon cycle.
Article
Environmental Sciences
Xiaoqi Dong, Zidan Huang, Xingxing Peng, Xiaoshan Jia
Summary: A novel coupled yeast-sludge system (CYSS) showed improved efficiency in treating non-sterile mainstream wastewater. Molecular and network analysis revealed the important role of the yeast Candida sp. PNY in the system.
Article
Chemistry, Multidisciplinary
Hamad Al-Mebayedh, Anyi Niu, Chuxia Lin
Summary: Field and laboratory investigations were conducted to characterize the composition of petroleum hydrocarbons in oily sludge and contaminated soils in a decommissioned oilfield waste pit in Kuwait. The results showed spatial variability in the composition of petroleum hydrocarbons, with shallow soil contamination depth. A loose relationship was found between TPH in the sludge and that in the underlying soil. The environmental risk was considered relatively low, and soil capping was deemed a cost-effective management option.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Biming Liu, Yue Teng, Wenbin Song, Haixia Wu
Summary: The use of novel chemical conditioner OSO-101 improved the dewaterability efficiency of high water content oily sludge (OS) and transformed it into solid fuel. The resulting OS fuel blocks had extremely low levels of heavy metals and dioxins, meeting environmental protection emission standards and offering economic benefits through effective recovery of calorific value.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Jie Zhang, Hulin Li, Qian Liu, Hao Zhang, Xiaoliang Li, Xing Zheng
Summary: In this paper, the degradation of pollutants and heavy metal migration in supercritical water oxidation (SCWO) of oily sludge were studied. The influence and behavior mechanisms of auxiliary fuels were illuminated. The results showed that with the addition of 800 mmol/L methanol, the removal efficiencies of TOC and TN at 550 degrees C were 97.9% and 67.0%, respectively. Ethylene glycol exhibited an excellent enhanced degradation effect and the two-stage injection technique resulted in improved degradation efficiency. The distribution of heavy metals before and after SCWO reaction was investigated, and the aqueous product and solid residual met heavy metal discharge criteria.
JOURNAL OF SUPERCRITICAL FLUIDS
(2023)
Article
Environmental Sciences
Elizabeth Alvarez-Chavez, Stephane Godbout, Mylene Genereux, Caroline Cote, Alain N. Rousseau, Sebastien Fournel
Summary: This study evaluated the effect of alternative filtering materials and bed aeration on the retention of nutrients and fecal bacteria in woodchip bedded stand-off pads for cows. The results showed that the alternative biofilters were more efficient in removing COD, SS, TN, and NO3-N, while conventional biofilters were more efficient for PO4-P removal. Aeration did not have a significant effect under the tested temperature conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yike Zhang, Zengyi Ma, Zhuoting Fang, Yuandong Qian, Zhiping Huang, Yilong Ye, Jianhua Yan
Summary: This study investigates the application of oxygen enrichment melting technology in the melting of municipal solid waste incineration fly ash. The results demonstrate that oxygen enrichment technology can reduce energy consumption and operating costs, as well as decrease pollution emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Liangang Xiao, Mingkai Leng, Philip Greenwood, Rongqin Zhao, Zhixiang Xie, Zengtao You, Junguo Liu
Summary: This study investigates the effects of grazing exclusion on soil organic carbon (SOC) accumulation and vegetation recovery. It finds that grazing exclusion can increase the potential for SOC accumulation, and higher annual precipitation is positively correlated with SOC accumulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Beatrice Cantoni, Jessica Ianes, Beatrice Bertolo, Selena Ziccardi, Francesco Maffini, Manuela Antonelli
Summary: This study evaluates the performance of ozonation and adsorption as in-series processes compared to standalone processes for the removal of Contaminants of Emerging Concern (CECs) in drinking water. The combination of both processes proves to be more effective than adsorption and ozonation alone. Ozonation improves the adsorption performance of poorly-oxidizable CECs but worsens that of well-oxidizable compounds. This research highlights the importance of considering both processes in the removal of CECs in drinking water treatment plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Dan Li, Bingjun Liu, Yang Lu, Jianyu Fu
Summary: A new Standardized compound Drought and Saltwater intrusion Index (SDSI) was developed to detect changes in the severity of CDSEs in six estuaries. The study found that saltwater intrusion plays a dominant role in influencing SDSI severity, and CDSEs vary in frequency, duration and severity among different estuaries.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yong-Qiang Li, Rui Sun, Chong-Miao Zhang, Zi-Xuan Liu, Rui-tao Chen, Jian Zhao, Hua-dong Gu, Huan-Cai Yin
Summary: In this study, an electron beam excitation multi-wavelength ultraviolet (EBE-MW-UV) system was established and found to have significantly higher microbial inactivation effects compared to single-wavelength UV-LEDs in water. Mechanism analysis revealed that EBE-MW-UV damaged microbial DNA and proteins, and generated additional reactive oxygen species, leading to microbial inactivation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Kaili Ma, Xinxin Han, Qiujuan Li, Yu Kong, Qiaoli Liu, Xu Yan, Yahong Luo, Xiaopin Li, Huiyang Wen, Zhiguo Cao
Summary: This study reveals that the use of a tryptophan-degrading microbial consortium (TDC) can enhance the hydrolysis efficiency of waste activated sludge (WAS), increasing the yield and quality of short chain fatty acids (SCFAs) and improving the solubilization and release of organic substances from WAS.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Ling Xiong, Rui Li
Summary: Incorporating Ecosystem Service Value (ESV) into land use planning can provide informed land management decisions. This study evaluates the ESV of Guizhou Province in China's karst region. The results show an increase in total ESV over the past two decades due to ecological restoration projects.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
M. Geetha Jenifel
Summary: This article discusses the importance of water and the pollution of freshwater resources, and introduces the use of machine learning models and blockchain technology to predict and protect water quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Stanslaus Terengia Materu, Taotao Chen, Chang Liu, Daocai Chi, Meng Jun
Summary: The study showed that H2SO4-modified biochar can reduce P leaching, increase soil available P, and enhance plant P uptake in alternate wetting and drying irrigation systems. Biochar additions B20A and IAWDB20A-M were effective in improving yield, reducing P leaching, and increasing APB.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Amir Nouri, Ali Akbar Zinatizadeh, Sirus Zinadini, Mark Van Loosdrecht
Summary: This study focuses on the development of an air-lift bio-electrochemical reactor (ALBER) with a continuous feeding regime to enhance nitrogen removal from synthetic wastewater. The effect of temperature, hydraulic retention time (HRT), N -NH+4 /TN ratio, and current density on the reactor performance was investigated, and the ALBER achieved a maximum TN removal of 73%. The results suggest that the ALBER has potential for treating industrial wastewater at low temperatures.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Peifang Wang, Guoxiang You, Yang Gao, Juan Chen, Xun Wang, Chao Wang
Summary: This study investigated the ecological processes of microbial communities and N- and P-transformation processes in multistage agricultural drainage ditches. The results showed that the microbial communities were co-shaped by agricultural practices and ditch size, which further governed the N and P removal performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Xiaofeng Niu, Huan Wang, Tao Wang, Peiyu Zhang, Huan Zhang, Hongxia Wang, Xianghong Kong, Songguang Xie, Jun Xu
Summary: Microorganisms play a critical role in maintaining ecosystem balance, and environmental stressors can affect the assembly processes of microbial communities. The study found that different stressors have opposite effects on microbial community assembly in water and sediment, and warming has different influences compared to herbicides and nutrients.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yuqing Tan, Qiming Cheng, Fengwei Lyu, Fei Liu, Linhao Liu, Yihong Su, Shaochun Yuan, Wenyu Xiao, Zhen Liu, Yao Chen
Summary: The exacerbation of global warming, extreme weather events, and rapid urbanization have led to increased flooding in urban areas. China has adopted sponge city as an efficient means of preventing and controlling urban floods. Using a SWMM-FVCOM model, the hydrological reduction and control effect of sponge city construction (SPCC) within a university campus were evaluated. The study found that implementing SPCC effectively mitigates surface runoff and reduces the severity of urban flooding. However, the efficacy of runoff control decreases with longer rainfall return periods.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Zhonghan Chen, Qiuyan Li, Shibo Yan, Juan Xu, Qiaoyun Lin, Zhuangming Zhao, Ziying He
Summary: Tidal rivers are important biochemical reaction channels, receiving carbon from wastewater and agricultural drains, affecting CO2 emissions. Through modeling and data analysis, researchers explored carbon distribution, emissions, and greenhouse effects, emphasizing the potential of river management to change global CO2 emissions under climate change.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)