scispace - formally typeset
Search or ask a question

What are the challenges associated with anaerobic digestion from seawater olive oil bagasse? 


Best insight from top research papers

Anaerobic digestion (AD) of olive-mill wastewater (OMW) faces challenges due to the toxicity of phenolic compounds to methanogenic bacteria . To address this, a catalytic process using copper supported on alumina pillared clay with H2O2 and UV light has been developed to reduce phenolic compounds, making OMW less toxic for AD . Additionally, high solid anaerobic digestion (HSAD) aims to optimize water usage, organic loading rate, and nutrient retention but faces constraints like low methane production rates and high operational costs . Challenges in HSAD include inhibition, temperature, moisture, and reactor design, with low moisture and poor mixing hindering methane yield . Technological integration, such as thermo-mesophilic digestion and co-digestion, is crucial to enhance HSAD efficiency .

Answers from top 4 papers

More filters

Related Questions

What volatile fatty acids affect the biogas production in anaerobic digestion?5 answersVolatile fatty acids (VFAs) have been found to affect biogas production in anaerobic digestion. Acetic acid, propionic acid, and butyric acid are the VFAs that have been studied in relation to biogas production. The presence of VFAs, particularly acetic acid, has been shown to promote CH4 production in anaerobic digestion systems. Different types of VFAs have different effects on biogas production. For example, barley straw has been found to be more effective in converting raw material into VFAs compared to wheat and rye straw. Additionally, the accumulation of VFAs, such as acetic acid, has been shown to impact the yield of methane gas in thermophilic anaerobic digestion processes. Furthermore, the ratio of butyric acid/acetic acid (B/A) has been found to influence the efficiency of biogas production, with higher B/A ratios resulting in higher biogas yields. Overall, the presence and composition of VFAs play a significant role in biogas production during anaerobic digestion.
Problems associated with anaerobic digestion are?4 answersAnaerobic digestion faces several problems. These include the need to increase biogas production and treatment efficiency, as well as the challenges of managing degradable waste and achieving stable anaerobic digestion. Mathematical modeling of anaerobic digestion is complex and there is no consensus on the use of statistical criteria to evaluate models. The development of anaerobic digestion technologies also requires addressing challenges related to conversion efficiency, process stability, product quality, and economic feasibility. Monitoring and controlling the anaerobic digestion process is another issue, with parameters like pH and redox potential not providing a complete picture of the fermentation status. Overall, there is a need for further research and development to overcome these problems and ensure the widespread adoption of anaerobic digestion as a sustainable and efficient waste management and energy production technology.
What are the challenges and opportunities in using anaerobic digestion to convert agricultural waste into energy?5 answersAnaerobic digestion of agricultural waste for energy production presents both challenges and opportunities. One of the main challenges is the need for improved process monitoring and technical training for producers. Additionally, the efficient management of the anaerobic biodigestion process remains a challenge in developing countries due to the lack of information from producers. However, there are several opportunities in this field. Anaerobic digestion can reduce the organic load of wastewater and provide economic benefits to farmers through biogas and biofertilizer production. It also offers a relevant environmental gain by promoting nitrogen removal from digestate through microalgal systems. Furthermore, the reuse of lignocellulosic biomaterials for bioenergy production can contribute to a circular economy and the sustainable use of resources. Overall, anaerobic digestion of agricultural waste has the potential to address environmental concerns, generate clean energy, and improve waste management practices.
What are the difficulties faced by anaerobic digestion controllers for control?5 answersAnaerobic digestion controllers face several difficulties in control. One major challenge is the lack of robust and reliable process monitoring using online instrumentation, which hinders the implementation of fully automated process control strategies. Additionally, the uncertain feedstock conditions and the lack of reliable measurements make it difficult to apply classical and advanced control strategies to AD. Moreover, the conservative industry is reluctant towards the implementation of closed-loop feed control and automated process control strategies. Another difficulty is the need to find a compromise between maximizing economic yield, minimizing the ecological footprint, and minimizing the risk of process failure. The lack of commitment from authorities to clear definitions and changing legislation requirements also contribute to the challenges faced by AD controllers. Overall, the complexities of the physicochemical and biological characteristics of AD processes, along with the lack of reliable monitoring and control strategies, pose significant difficulties for anaerobic digestion controllers.
What are the major challenges in the biogas recovery process from waste?5 answersThe major challenges in the biogas recovery process from waste include the need to adjust the carbon dioxide content to upgrade the calorific power and economic value, as well as the removal of potentially hazardous and toxic impurities such as carbon monoxide, hydrogen sulfur, halogens, ammonia, and siloxanes. Co-digestion and pretreatment techniques can be applied to enhance biogas production, but they can also decrease the biogas yield of food waste. The efficient production of biogas relies on a complex microbial process, which requires an appropriate environment for the multiplication of microbes and their proper functioning. The adsorption/removal of impurities, particularly hydrogen sulfide and carbon dioxide, from the biogas stream is crucial for improving the efficiency of biogas as a renewable energy fuel. Challenges in biogas recovery from wastewater treatment plants include the lack of government subsidies, underdeveloped and unregulated biogas markets, and infrastructure and electricity price limitations.
What are some of the challenges of anaerobic fermentation of coffee?1 answersThe challenges of anaerobic fermentation of coffee include the risk of microbial contamination from fungi that can produce mycotoxins, the need for further studies to assess the safety of the fermentation process, and the severe energy limitation that acetogens have to deal with. The microbial community in the fermentation process can be influenced by factors such as washing the coffee fruits before fermentation, leading to changes in the fermentation time and the dominance of certain microorganisms. The use of self-induced anaerobic fermentation (SIAF) in coffee processing results in a different microbial community compared to traditional processing methods, with a higher prevalence of Enterobacteriaceae and Nectriaceae. However, the presence of potential mycotoxin-producing fungi poses a risk of contamination. Additionally, acetogens face energy limitations in the anaerobic fermentation process, which can impact the efficiency of the fermentation and the production of desired compounds. Further research is needed to address these challenges and ensure the safety and quality of anaerobic fermentation in coffee processing.

See what other people are reading

Effect of radioactivity on crystalline materials?
5 answers
Radioactive decay, such as beta-decay of 137Cs to 137Ba, can impact crystalline materials by transmuting elements, altering valence, and ionic radii. This transmutation can lead to changes in the crystal structure over time, affecting properties like leach rate and volume expansion. Studies have shown that alpha-recoil damage and alpha damage can cause structural changes in crystalline waste forms, but transmutations may not significantly affect their stability. Techniques like channeling patterns from radioactive recoil atoms can reveal crystal structures in single crystals, providing insights into crystal lattice arrangements. Overall, the ionizing radiation released during radioactive decay, in the form of alpha particles, beta particles, or gamma rays, can induce various effects on crystalline materials, influencing their long-term stability and properties.
How is consumption forecasting important in the USA?
5 answers
Consumption forecasting is crucial in the USA for various reasons. Firstly, accurate forecasting aids in formulating energy policies and allocating resources effectively. Secondly, it plays a significant role in predicting real personal consumption expenditure, especially during economic downturns, by incorporating consumer confidence measures. Additionally, forecasting consumption trends helps in providing tailored plans for resource usage, reducing costs, and managing resources like water, gas, and electricity efficiently. By utilizing advanced models like ensemble empirical mode decomposition (EEMD), echo state network (ESN), and grasshopper optimization algorithm (GOA), forecasting models can achieve high accuracy in predicting energy consumption. These insights highlight the importance of consumption forecasting in the USA for policy-making, economic analysis, and resource management.
Is the presence of boron in groundwater a common occurrence in areas with sewage treatment plants?
5 answers
The presence of boron in groundwater is indeed a common occurrence in areas with sewage treatment plants. Studies have shown that boron concentrations in groundwater can be significantly elevated due to sewage waste contamination, with levels ranging from 3.70 to 44.98 mg/L. Additionally, isotopic analysis has been used to identify boron sources in groundwater near sewage disposal facilities, highlighting the impact of human activities on boron levels. Furthermore, research has indicated that boron from detergent, washing powder, municipal wastewater, and contaminated groundwater can contribute to boron pollution in water sources, including groundwater. Therefore, the presence of boron in groundwater in areas with sewage treatment plants is a prevalent issue, emphasizing the need for effective monitoring and remediation strategies to mitigate contamination risks.
Why to use energym?
5 answers
Energym is utilized for various reasons. It serves as an open-source library for testing and benchmarking building controllers, offering standardized evaluation scenarios, key performance indicators (KPIs), and forecasts of uncertain variables. Additionally, energy use data management systems, like the one described, help in monitoring and managing energy consumption efficiently, preventing errors in data input and reducing the processing load on energy use equipment. Energy use, being a fundamental aspect of human activities, significantly impacts various aspects of life, from physical comfort to economic achievements, highlighting its crucial role in societal development. Moreover, human energy use directly affects biodiversity through land use changes, pollution, and greenhouse gas emissions, emphasizing the importance of energy conservation, efficiency, and renewable energy sources to mitigate ecological impacts.
What are emerging technologies that could help to decarbonise the industry?
5 answers
Emerging technologies such as Thermal Process Intensification (TPI), Smart Manufacturing (SM), the Industrial Internet of Things (IoT), Renewable Energy (RE) technologies, and Electrification are crucial for decarbonizing industries. TPI focuses on improving energy performance through alternative energy sources and waste heat management. SM and IoT offer optimization opportunities by enhancing manufacturing processes through better control of temperature zones and increased process throughput. RE technologies like concentrating solar power, heat pumps, and green hydrogen play a vital role in decarbonizing Energy Intensive Industries (EIIs) by providing renewable electricity and heat for industrial processes. Electrification, particularly in the chemical industry, through electrochemical processes powered by renewable electricity, offers lower carbon footprints compared to conventional routes. These technologies collectively contribute to the decarbonization efforts in various industrial sectors.
How has the study of waste management evolved over the past decade?
5 answers
The study of waste management has evolved significantly over the past decade. Research has shown that sustainability in waste management varies across nations due to political, socioeconomic, and environmental factors. The thematic evolution of Municipal Solid Waste Management research has been observed through key topic areas such as "Landfill," "Urban Area," and "Uncertainty," with emerging themes like "Waste Management Systems" and "Treatment Technologies". Additionally, the concept of a "Smart Waste Management System" has emerged, integrating IoT devices for real-time monitoring of smart bins, reducing costs and fuel consumption. The intellectual structure of waste management problems has been shaped by Operations Research and Management Science techniques, as evidenced by Co-citation Analysis and network visualization methods.
What is the architectural style of the traditional houses in the rural areas of Saudi Arabia?
5 answers
The architectural style of traditional houses in the rural areas of Saudi Arabia is characterized by a rich heritage that is now facing challenges due to modernization. These traditional houses exhibit core concepts and forms that have been maintained over centuries, with specific design elements such as Mashrabiya contributing to both cultural and energy efficiency aspects. The architectural heritage in Saudi cities has suffered due to economic development and urbanization, leading to the disappearance of traditional features and materials. Studies on the Najd region highlight the importance of internal spatial order and cultural values in shaping the physical form of dwellings, emphasizing harmony and unity in the built environment. Additionally, research on contemporary buildings in Riyadh showcases how modern architecture can draw inspiration from traditional Najd architecture to maintain cultural identity in a rapidly evolving context.
Why are sustainable supply chains important?
4 answers
Sustainable supply chains are crucial for several interconnected reasons that span environmental, social, and economic dimensions. Firstly, they address the immediate effects of climate change by promoting practices that aim to reduce carbon emissions and ecological degradation, thereby contributing to global efforts like the Paris Agreement and mitigating the adverse impacts on ecosystems. Sustainable supply chains also support the circular economy paradigm, which emphasizes resource efficiency and the reduction of negative production impacts, aligning economic growth with environmental and social benefits. From an economic perspective, integrating sustainability into supply chains can enhance business performance by fostering supply chain cooperation, operation integration, and enterprise commitment, which in turn positively affects sustainability outcomes and competitive advantage, especially in small- and medium-sized enterprises. This is further supported by the role of sustainable logistics and third-party logistics companies in achieving more profitable, yet environmentally and socially responsible, supply chain operations. Technological adoption within sustainable supply chains, such as big data analytics, plays a pivotal role in enhancing transparency, sustainability culture, and risk management, thereby improving the overall sustainability of manufacturing supply chains. Moreover, sustainable supply chain management (SSCM) is essential for addressing suppliers' sustainability conflicts in multinational supply chains, particularly in developing nations, by fostering sustainable transformation through innovation diffusion and cooperation. In the agri-food sector, sustainable supply chains ensure the well-being of people and profitability, highlighting the importance of maintaining food supply systems that are both value-driven and sustainable. Additionally, in the construction industry, sustainable supply chain management addresses social, environmental, and economic concerns by employing life cycle assessment and triple bottom line sustainability dimensions, thus providing a framework for improving sustainability integration. Overall, sustainable supply chains are vital for achieving a balance between economic growth and the preservation of environmental and social well-being, making them indispensable in the pursuit of a sustainable future.
What are the retrofit techniques in tropical climate for Net Zero Buildings?
5 answers
Retrofit techniques for achieving Net Zero Energy Buildings (NZEBs) in tropical climates involve various strategies. Implementing Building Integration Photovoltaic (BIPV) systems is a key approach, offering clean energy generation while seamlessly integrating with the building envelope. Additionally, optimizing occupant behavior alongside specific changes in the building envelope can significantly reduce electricity consumption without the need for extensive modifications, leading to substantial energy savings. Furthermore, utilizing passive and active techniques, along with renewable energy sources like photovoltaic panels, can help in achieving NZEB status in tropical regions, with specific requirements such as 1 kW of photovoltaic panels for every 34-44 m² of floor area in NZEBs. These strategies, when combined effectively, can contribute to the successful retrofit of buildings towards achieving Net Zero Energy status in tropical climates.
What is the concentration of Fe in agricultural soil and gold mine dump soil?
5 answers
The concentration of Fe in agricultural soil and gold mine dump soil varies across different locations. In agricultural soils near gold mines in Nigeria, Fe concentrations ranged from 121.9-125.8 mg/kg. Similarly, in soils near a gold mine in Colombia, Fe concentrations were found to be excessive, indicating contamination. On the other hand, in dump sites in South Africa resulting from past gold mining activities, the average Fe concentration was reported to be around 130.1-136.2 mg/kg, indicating a presence of this metal in the dump soils. These findings highlight the diverse levels of Fe contamination in agricultural and gold mine dump soils, emphasizing the importance of monitoring and remediation efforts to mitigate potential environmental and health risks.
What is the introduction of research paper on school high room temperature?
5 answers
The introduction of the research paper on high room temperature in schools highlights the inadequacy of cooling systems in classrooms, leading to discomfort and poor thermal conditions for students. Studies emphasize the impact of increased air velocity and improved ventilation rates on students' performance and comfort. Additionally, the importance of maintaining optimal indoor environmental quality (IEQ) in schools is underscored, as poor IEQ can significantly affect students' learning abilities and overall well-being. Furthermore, the need for energy-efficient cooling methods in school environments is emphasized, with a focus on the potential benefits of implementing innovative cooling strategies to enhance student performance and comfort. Overall, the research aims to address the challenges posed by high room temperatures in schools and explore effective solutions to create conducive learning environments.