Solid Waste Generation Research Articles

Households’ and Farmers’ Willingness to Pay for Improved Municipal Solid Waste Management in Metropolitan Area of Sokoto State, Nigeria

Sokoto metropolis had recently witnessed an alarming increase in solid waste generation which could be harness and use as improved compost. This study examines households’ and Farmers’ willingness to pay for improved solid waste management services and its implications to agriculture. The population used for this study consist of selected households, farmers and stakeholders of solid waste management in Sokoto Metropolis. Multi-stage sampling technique was used in selecting the study respondents. A total of 150 households across low income, middle income, high income as well as mixed commercial residential areas and 30 farmers constituted the samples for the study. Descriptive statistics and logit regression model were used in analyzing the data collected. The results revealed that all household respondents generate waste and the major challenge that impedes willingness to pay is amount charged for the improved waste management services. The logit model vindicated that respondents in high and middle income residential areas had increasing tendency of accepting improved refuse waste management and are more willing to pay for improved refuse waste management services. On the other hand, a reasonable percentage of the farmers are willing to accept and pay for sorted refuse waste converted to compost. The unsorted refuse waste was attributed as a cheap source for manure but it contained polythenes, metals and other hazardous element which are harmful to human health and affects crops germination and growth. The improved refuse waste converted to compost could serve as an alternative source for low cost and high quality manure that is free from those harmful elements, to improve smallholder farmers’ crops productivity. This study therefore recommends for Public-Private-Partnership to address the menace of generated waste and the possible conversion of waste to wealth

The application of biodrying method for organic waste treatment in Universitas Trisakti, Jakarta

Universitas Trisakti has been attributed with many activities and has not been equipped with a proper solid waste management to recover the waste that may contaminate the environment. Biodrying becomes an approach of drying technique utilizing the heat generated by biological activities to degrade the organic waste and also acknowledged to be the proper technique to provide the raw material for Refuse Derived Fuel (RDF). This study aims to conduct the process of biodrying technique carried out in an acrylic chamber with the capacity of 18000 cm3. The source of municipal solid waste supplied by the transfer waste facility in the area of Universitas Trisakti. Only organic waste was used during the biodrying process. Aeration rate was 3 l/min. The biodrying process was observed for 8 (eight) days which the activities of microorganisms were identified at the third days, shown by the condensation of the evaporated water released on the top and side walls of the biodrying reactor. Due to this condition, the designed reactor needs further innovation to avoid the condensation of evaporated water to raise the reduction rate of moisture content. This pretreatment study showed the absence of leachate which proves that the biodrying method has the potential to reduce the negative impact of unmanaged solid waste generation.

An approach to utilize date seeds biochar as waste material for thermal energy storage applications

Rapid industrialization as a consequence of the green revolution and population proliferation has resulted in massive solid waste generation as well as greater energy consumption demands. With increasing energy demand coupled with ever-increasing waste generation, the time has come to think about global sustainability. The practice of green technology which is ecologically benevolent might be the foothold of waste management that renders resolutions. Therefore, waste valorization in sustainable energy forms can bring up an economic and suitable solution for the sustainability of civilization. Contemplating that, an attempt has been made to utilize date seeds as waste material for shape stabilization of phase change materials (PCMs) for effective thermal energy storage applications. Date seeds (DS) are ground to powder and pyrolyzed into porous biochar, having high porosity and channel-like morphology with a BET surface area of 187.07 m2/g. The PCM composites are accomplished by introducing capric acid (CA) into synthesized biochar (DSB). CA has been incorporated in 2:1 and 3:1 ratios into DSB and the thermal stability along with performance of the synthesized DSCA composites have been evaluated for their suitable applications. The 3:1 CA to DSB ratio has been realized as optimum for the highest accommodation of CA into DSB. Higher heat charging and discharging enthalpies of 72.4 and 71.76 J/g are accomplished for 1–3 DSCA sample as well as encapsulation efficiency and ratio are found to be 43.79 % and 43.96 %, respectively. During phase transitions, excellent leakage resistance and congruent heat charging and discharging capabilities have been manifested by the DSCA samples. The extraordinary performances displayed by the DSCA PCM composites are attributed to the surface tension, capillary action, space confinement and surface functionalities offered by the porous biochar.

Building Design from an Environmental Perspective: A Review on Sustainable Building Design Models and Analysis of their Application in Practice

The construction sector is known for enormous resource consumption and the generation of solid waste. Considering construction is essential for economic development and for providing facilities to ever increasing populations around the globe, there is a need to make construction activities more environmentally friendly. As architects and technocrats are increasingly facing the need to achieve more sustainable and efficient buildings, they are empathizing with ways for reducing the environmental impact and consumption of energy in buildings. The present study aimed at reviewing various sustainable development models and technology initiatives like Building Information Modelling (BIM), Building Energy Modelling (BEM), Urban Building Energy Modelling (UBEM), and integrated frameworks like Circular Economy (CE) that enable improved environmental performance of the structures. Out of these models, the circular economy seems to be the most promising approach that can have a massive effect on the environmental impact of the buildings, but the concept is new and it requires industrywide restructuring at various levels. Keywords Sustainable building, Building Information Modelling, Building Energy Simulation, Integrated Design Process

Prediction of municipal solid waste generation and analysis of dominant variables in rapidly developing cities based on machine learning - a case study of China.

Prediction of municipal solid waste (MSW) generation plays an essential role in effective waste management. The main objectives of this study were to develop models for accurate prediction of MSW generation (MSWG) and analyze the influence of dominant variables on MSWG. To elevate the model's prediction accuracy, more than 50 municipal variables were considered original variables, which were selected from 12 categories. According to the screening results, the dominant variables are classified into four categories: urban greening, population size and residential density, regional economic development and resident income and expenditure. Among the seven machine learning methods, back propagation (BP) neural network has the best model evaluation effect. The R2 of the BP neural network model of Jiangsu, Zhejiang and Shandong provinces were 0.969, 0.941 and 0.971 respectively. The prediction accuracy of Shandong province (93.8%) was the best, followed by Jiangsu province (92.3%) and Zhejiang province (72.7%). The correlation between dominant variables and the MSWG was mined, suggesting that regional GDP and the total retail sales of consumer goods were the most important dominant variables affecting MSWG. Moreover, the MSWG might not absolutely associate with the population size and residential density. The method used in this study is a practical tool for policymakers on regional/local waste management and MSWG control.

Gambaran Pengelolaan Limbah Medis Padat pada Klinik Bidan Praktik Mandiri di Kecamatan Lempuing Kabupaten Ogan Komering Ilir Tahun 2023

WHO said that in 2010, unsafe injections still caused as many as 33,800 new HIV infections, 1.7 million hepatitis B infections, and 315,000 hepatitis C infections. Independent Practice Midwife Clinics are one source of solid medical waste generation. Knowledge of solid medical waste management at independent practicing midwife clinics in Lempuing District, Ogan Komering Ilir Regency in 2023. Research This type of research is descriptive research. This research was conducted in March-May 2023. The population in this study were all 38 independent practicing midwife clinics. The sample is total sampling, namely all independent practicing midwife clinics. The data collection tool is a checklist sheet. Variable sorting, container, storage, and transportation. Data analysis using Univariate Analysis. Sorting 38 (100%) fulfilled the requirements, containers for labeling infectious waste 8 (22%) and pharmaceutical 13 (44%), container grouping for infectious 15 (40%) and pharmaceutical 30 (70%) did not meet the requirements. Storage contained 23 (59%) separate rooms, 8 (21%) covered packaging, and 20 (53%) identity labeled packaging did not meet the requirements. Transportation 11 (29%) did not carry out transportation. by concluding that 38 (100%) have done proper sorting, for containers that have not been labeled infectious waste 8 (22%) and pharmaceutical 13 (44%), there is no separate storage room 23 (59%), there is the packaging does not have a cover 8 (21%), the packaging does not have an identity label 20 (53%). Transportation 11 (29%) did not carry out the transportation be consistent in carrying out proper sorting, more complete facilities, especially in terms of container and storage, and know how to process and transport medical waste properly and correctly.

International trade of PRC and its place in environmental sustainability

The sustainable development of trade and the environment is related to the sustainability of a region, a country, and even the global economy. As a major trading country, China has achieved remarkable results in international trade growth in recent years, driven by its continuous deepening of open trade policies. Article identify the key factors that contribute to the changes in environmental sustainability in China’s international trade. Research defined the ways of China’s growth of international trade volume with promoting sustainable environmental development. Analysis found the impact and role of the continuous expansion of trade scale on China’s sustainable environmental development. By analyzing the data on the scale and structure of China’s international trade, research checked the data changes that affect the relationship between international trade and environmentally sustainable development. In this paper we substantiate the conceptual provisions of the theoretical and methodological model of the international trade and its place in environmental sustainability: system characteristics (international trade development to total GDP; international trade pattern structure analysis; geographic direction of international trade) and the principles of environmental sustainability (total industrial waste gas emissions and treatment; industrial solid waste generation, disposal and comprehensive utilization; industrial wastewater emissions, industrial chemical oxygen demand emissions, and Industrial ammonia nitrogen emissions).

Advancing the Application of a Multidimensional Sustainable Urban Waste Management Model in a Circular Economy in Mexico City

The increase in global municipal solid waste (MSW) generation, with a significant portion being improperly managed, has resulted in detrimental socio-ecological effects. This paper addresses the challenge of implementing effective waste management practices for achieving sustainability, particularly in urban areas where the majority of global waste is generated. It emphasizes the need for a multidimensional, multiscale, and long-term approach that surpasses local solutions and linear strategies. The approach recognizes the broader impacts of waste management beyond city boundaries and promotes circularity by incorporating waste reduction, reuse, recycling, and proper disposal practices. Through an analysis of the literature on waste from 1992 to 2022, this paper aims to identify the key concepts, propose solutions, and explore sustainable waste management scenarios. This paper introduces the m-SWM4Cities model for sustainable waste management in urban areas, highlighting its methodology and application in Mexico City (mD-SWM4CDMX). The models presented in this paper incorporate essential elements and interactions, providing a comprehensive understanding of the transition to sustainable waste management. The findings highlight the importance of monitoring waste management indicators and offer insights into the waste system of Mexico City. The m-SWM4Cities model can be adapted to address specific city contexts and thus serves as a valuable tool for assessing and improving waste management practices.

Generation and residues management in timber industries in the Midwest region of the state of Paraná

The timber industries generate significant amounts of waste, throughout its production process, constituting an environmental aggravating, due to its inadequate final disposal and the lack of alternatives to use. This study aimed to diagnose the generation of solid waste and evaluate the management of these in the timber industries. Through the application of a questionnaire, a diagnosis was made of the main residues generated by sawmills, veneer and plywood industries in the regions of Guarapuava e Irati, Paraná, verifying the management of these residues and the environmental performance of the industries. An amount of 13 thousand m³/month of generated residues was diagnosed, with emphasis on “coastline”, “wood processing finishing residues (dust, wood shavings)”, “log core” and “plywood cutting”. Only 50% of industries separate the residues, 11 make use of this residues and 9 have environmental management systems. It can be concluded that the industries lack alternatives for destination and use.

Suitability of MRF Recovered Post-Consumer Polypropylene Applications in Extrusion Blow Molded Bottle Food Packaging.

Polypropylene (PP) is one of the most abundant plastics used due to its low price, moldability, temperature and chemical resistance, and outstanding mechanical properties. Consequently, waste from plastic materials is anticipated to rapidly increase with continually increasing demand. When addressing the global problem of solid waste generation, post-consumer recycled materials are encouraged for use in new consumer and industrial products. As a result, the demand is projected to grow in the next several years. In this study, material recovery facility (MRF)-recovered post-consumer PP was utilized to determine its suitability for extrusion blow molded bottle food packaging. PP was sorted and removed from mixed-polymer MRF-recovered bales, ground, trommel-washed, then washed following the Association of Plastics Recyclers' protocols. The washed PCR-PP flake was pelletized then manually blended with virgin PP resin at 25%, 50%, 75, and 100% PCR-PP concentrations and fed into the extrusion blow molding (EBM) machine. The EBM bottles were then tested for physical performance and regulatory compliance (limits of TPCH: 100 μg/g). The results showed an increased crystallization temperature but no practical difference in crystallinity as a function of PCR-PP concentrations. Barrier properties (oxygen and water vapor) remained relatively constant except for 100% MRF-recovered PCR-PP, which was higher for both gas types. Stiffness significantly improved in bottles with PCR-PP (p-value < 0.05). In addition, a wider range of N/IAS was detected in PCR-PP due to plastic additives, food additives, and degradation byproducts. Lastly, targeted phthalates did not exceed the limits of TPCH, and trace levels of BPA were detected in the MRF PCR-PP. Furthermore, the study's results provide critical information on the use of MRF recovered in food packaging applications without compromising performance integrity.

Potential for Thermo-Chemical Conversion of Solid Waste in Canada to Fuel, Heat, and Electricity

The amount of municipal solid waste (MSW) generation in Canada was 34 million tonnes in 2018. Responsible waste management is challenging, but essential to protect the environment and to prevent the contamination of the ecosystem on which we rely. Landfilling is the least desirable option, and diversion through thermo-chemical conversion to value-added products is a good option for difficult-to-recycle waste. In this study, the amounts, moisture contents, heating values, and compositions of municipally collected solid waste produced in Canada are reported, a classification that is suitable for conversion purposes is proposed, and the potential for thermo-chemical conversion is determined. Much of the waste generated in Canada is suitable for being converted, and its potential for heat or electricity generation was determined to be 193 PJ/yr and 37 TWh/y, respectively. The GHG emissions that are saved through diversion from the landfill, while assuming the generated heat or electricity offsets natural gas combustion, gives a GHG reduction of 10.6 MMTCO2E/yr or 1.6% of Canada’s GHG emissions. The blending of waste in feedstocks can have varying effects on the amount of biogenic CO2 produced per unit energy in the feedstock, which is an important consideration for new projects. Other considerations include the heating values, moisture contents, and contaminant levels in the waste.

Economic-Financial Analysis of Municipal Solid Waste Recycling In Brazil: a Case Study of a Recycling Cooperative

Economic development and the growth of industrialization have contributed to an increase in the generation of solid waste in urban areas. Municipal solid waste recycling cooperatives (MSWRCs) provide environmental benefits as well as better working and living conditions for waste pickers. This article analyzes the economic viability of a MSWRC in Brazil using economic-financial indicators, with data from September 2021. Economic viability was analyzed considering the net present value (NPV), annualized net present value (ANPV), internal rate of return (IRR), benefit-cost ratio (BCR) and discounted payback with a minimum attractiveness return rate (MARR) of 3% per year. Financial risk was evaluated using the Monte Carlo method, considering three scenarios for income and the remuneration of cooperative members. The base scenario (operating conditions prioritizing the remuneration of the members of the cooperative) places the future sustainability of the business at risk. Variations in the revenue from the sale of recyclable materials and in the remuneration of cooperative members exert a considerable influence on economic and financial indicators, representing a high risk of losses (between 23% and 26.6%). In conclusion, the future sustainability of MSWRCs depends on strategies for increasing revenue whether through the enterprises themselves or through public policies. The need for the better remuneration of cooperative members constitutes a challenge for management due to the need to make investments in the maintenance and growth of the production unit.

Prospects of Waste Incineration for Improved Municipal Solid Waste (MSW) Management in Ghana—A Review

The per capita municipal solid waste (MSW) generation per day in Ghana is estimated to be 0.47 kg/person/day, which translates to over 14,000 tonnes of solid waste generation daily. The disposal and management of this amount of solid waste has been challenging worldwide, and in Ghana, this is evident with the creation of unsanitary dumping sites scattered across most communities in the country, especially urban communities. The indiscriminate disposal of solid waste in Ghana is known to cause flooding, the pollution of water bodies, and the spread of diseases. The purpose of this review is to highlight the prospects of waste incineration with energy recovery as a waste-to-energy (WtE) technology which has contributed immensely to the disposal and management of MSW in nations worldwide (especially developed ones). The review indicates that waste incineration with energy recovery is a matured waste-to-energy technology in developed nations, and there are currently about 492 waste incineration plants in operation in the EU, over 77 in operation in about 25 states in the USA, and about 1900 in operation in Japan. Waste incineration with energy recovery is also gradually gaining prominence in developing nations like China, Brazil, Bangladesh, Nigeria, Indonesia, and Pakistan. The adoption of waste incineration with energy technology can reduce Ghana’s overdependence on fossil fuels as primary sources of energy. It is, however, recommended that a techno-economic assessment of proposed waste incineration facilities is performed considering the MSW generated in Ghana. Additionally, it is also recommended that the possibility of incorporating the use of artificial intelligence technology into the management of MSW in Ghana be investigated.

Upgrading of solid recovered fuel (SRF) by dechlorination and catalytic pyrolysis over nanocrystalline ZSM-5 zeolite

Globally increasing concern related to municipal solid waste generation is encouraging research efforts on developing alternative routes to valorize mixed refused wastes. In this way, catalytic pyrolysis is emerging as an interesting and efficient technology due to its great flexibility in terms of feedstock. In the current work, upgrading of a Solid Recovered Fuel (SRF) has been investigated by catalytic pyrolysis over nanocrystalline ZSM-5 zeolite (n-ZSM-5), paying special attention to dechlorination effects due to the high Cl content of the raw waste. Thus, pretreatment of the SRF by water washing and mild thermal processing allows for a significant reduction of the Cl concentration. Regarding the catalytic pyrolysis step, the best conditions correspond with a temperature of 400 °C in the catalyst bed and 0.50 catalyst/SRF mass ratio, which lead to ca. 30 wt% oil yield (rich in aromatic hydrocarbons) together with about 40 wt% gas yield (rich in C3–C4 olefins). Accordingly, these products could find use as raw chemicals or for the production of advanced fuels. In addition, zeolite reutilization has been tested for several cycles, denoting a progressive modification of the products distribution because of coke deposition. However, an almost total recovery of the n-ZSM-5 zeolite catalytic performance is achieved after regeneration by air calcination, affording the production of an oil fraction with a Cl content as low as 40 ppm.

DATA ENVELOPMENT ANALYSIS APPLIED TO SOLID WASTE MANAGEMENT IN THE 21ST CENTURY: A BIBLIOMETRIC ANALYSIS

The increase in solid waste generation and the necessity for more efficient management are issues of modern society. Nonetheless, its multifactorial nature makes this problem complex and searching for solutions not simple. In this way, this type of study requires tools that allow simultaneous incorporation of multiple variables. Data Envelopment Analysis (DEA) is a multivariate and non-parametric technique that analyzes a unit’s efficiency by comparison. The bibliography indicates that this technique applied to ​solid waste management systems is already a reality. However, there has been no bibliometric reports on current and future research trends about the theme. Thus, this paper aims to fill this gap through a bibliometric analysis, using the literature from the Scopus database, considering articles from journals and conferences published until February 2022. The results indicate that this topic research began in the 21st century, with an expressive rise since 2016, highlighting the topic’s relevance and potential for future research application. In addition, China, Spain, Italy, and the USA are the most productive countries, but cooperation is still weak. Hence, there is a potential to disseminate this research field and promote greater interinstitutional cooperation. Moreover, the findings reveal that DEA is an adequate tool to analyze solid waste management systems. Lastly, this study offers some future research suggestions, based on the results obtained through the bibliometric analysis.

Quantification and characterization of household solid waste at Urban Area of Kathmandu

Solid waste management can have significant positive and negative implications to the physical, social and economic environment and these implications are the function of management options adopted. The quantity and character of the waste generated changes with time and understanding these properties of waste in a locality form the basis of solid waste management. Thus, this research aims to understand the rate of solid waste generation in Kathmandu Metropolitan City, Ward 31, Shantinagar, and characterize the waste based on composition and management options. Waste generated by 100 households in 24 hours was collected, segregated, and weighed to quantify and characterize the waste generated at household level. Furthermore, an in-person interview was conducted with the household representatives using a semi-structured questionnaire to understand the options used for solid waste management at household level and their willingness to participate in waste segregation at source. The percentage composition of each waste category and per capita waste generated at household level was calculated. The relation of the per capita waste with number of family member was modeled by using linear regression. Data analysis was performed by using Microsoft Excel and R software. Significant fractions of the waste generated in the households were organic waste followed by paper waste which together makes up nearly 51% of total weight of the solid waste generated in the area. Per capita waste generation was found to be 402.7 grams per person per day. Per capita waste generation was a function of the number of family members with a decrease in per capita waste by an average of 111 g with an increase in one member in a family. Households who are involved in rooftop farming were segregating waste at the source indicating the local government can encourage rooftop farming to promote waste segregation at source.

Evaluation of Multi-Utility Models with Municipal Solid Waste Combustion as the Primary Source under Specific Geographical and Operating Conditions

Developments in waste incineration technology in terms of efficient fuel preparation, combustion, and emissions reduction, as well as the growing needs of the community in terms of electricity, water, and air conditioning loads, are the prime motive for this study. This study presents a novel approach, in which three models of the fluidized bed combustion of municipal waste for simultaneous power generation, freshwater production, and district cooling are analyzed for their energy and exergy performance. The three simultaneously evaluated utility models are different configurations of a fluidized bed combustion system with Rankine cycle power generation, cooling with a vapor absorption refrigeration system, and fresh water production using multiple effect desalination. The output from the turbine, cooling system, and desalination system is determined using the Engineering Equations Solver for different boiler operating pressures. Energy and exergy analysis data for different pressures are used to identify the best configuration. Two variants of the absorption cooling system, namely, single effect and double effect, are considered. The variants of the multiple-effect desalination are the three-stage and five-stage methods. Input parameters used in this study are municipal solid waste generation and composition data collected for an urban community in an arid climate zone with high demand for electric power, cooling, and fresh water. Model 2, which contains two turbines with the reheating and cooling systems connected to a high-pressure turbine and water desalination connected to a low-pressure turbine, gave the best overall performance. Significant savings in terms of the replacement of conventional energy were observed from these waste conversion plants with greater benefits in arid weather conditions. The results obtained by different models under different operating criteria constitute a guideline for municipal planners for the selection of appropriate waste utilization technology, as well as the appropriate operations.

Model for Estimating Waste Generation in Pekanbaru Using Backpropagation Algorithm

Waste generation in Pekanbaru City cannot be managed optimally. Based on 2020 data, less than 50% of the waste that reaches the Final Disposal Site (TPA) reaches. To overcome this problem, this study aims to create an estimation model that can estimate the amount of waste generated each year. So that it can help the authorities to implement various policies to control waste generation. The estimation model is created using the backpropagation algorithm. The attributes used are those related to population and waste generation. Based on the results of experiments conducted using RapidMiner, the best network architecture model is the 6-6-1 model, namely six nodes in the input layer, six nodes in the hidden layer, and one node in the output layer. The six nodes in the input layer refer to the number of attributes used. The activation function used is binary sigmoid. The RMSE value generated from the best model is very low, namely 0.0181. So it can be concluded that this model can be used to estimate the generation of solid waste in Pekanbaru City

Technological, political and economic challenges of urban solid waste in the state of Pará, Brasil

Due to population growth and urbanization itself, the amount of urban solid waste generated every day that needs to be destined for an environmentally appropriate purpose is increasing, therefore, this article aimed to investigate and analyze the technological, political and economic challenges of urban solid waste in the State of Pará. In methodological terms, a bibliographic review was carried out based on scientific articles that deal with the theme of this work and document analysis on the management of solid waste, its problems and challenges in the state of Pará. The data used are primary and secondary, they were collected in November 2022 on the platform of the national information system on solid waste management (SINIR) and the National Sanitation Information System (SNIS). For the execution of the work, the information considered was about the generation, collection, disposal and treatment of urban solid waste in the state of Pará, in addition to compliance with the National Solid Waste Policy. After that, the data analysis step was done through graphs and tables to represent the information studied. The results showed that the only technology to which urban solid waste in the state was destined until the year 2019 was recycling, and that the main method of collecting this waste was selective collection. Most municipalities do not properly dispose of their waste or even do not provide data on this situation, which can generate management difficulties. In addition, several financial support mechanisms were found for the destination of this waste.

Recycling of lithium and fluoride from LiF wastewater from LiF synthesis industry by solvent extraction

The LiF synthesis industry produces a large amount of wastewater that contains ∼0.36 g/L lithium and ∼1.10 g/L fluorine. The traditional treatment solidified fluoride by excessive CaO, resulting in waste of lithium resources and generation of CaF2-CaO solid waste. To recover the Li and F from the LiF wastewater, a two-section solvent extraction process using acidic solvent and mixed solvent as organic solvent was designed and the extraction mechanism were systematically investigated. The result showed that Li extraction was extracted by a cation exchange mechanism with D2EHPA (di-2-ethyl hexyl phosphoric acid), 99.72% Li recovery and battery-grade LiCl solution (3.40 g/L) were achieved by mixed the LiF aqueous with the saponified D2EHPA at 25 ℃ for 6 mins with 4.60 equilibrium pH. After then, F was recovered by mixed neutral solvent system, which coordination binding with HF molecule. The ultimately residue contains ∼1 mg/L Li and < 6 mg/L F. Besides, high-purity LiF products (LiF>99.95%) was generated by stripping with LiOH, F recovery is 99.45%. 2-stage extraction process realizes lithium and fluoride recovery with short process, no pollution and great prospect of industrialization.