Reduction Of Environmental Pollution Research Articles

Characteristic of Asphalt Mixture using Fly Ash and Bottom Ash Substitution in Reducing Environment Pollution

One of the waste materials produced by industry activities is fly ash and bottom ash (FABA), it is produced by brick combustion waste. Fly ash and bottom ash waste is hazardous and toxic (B3) waste for it contains heavy metal oxides polluting the environment. Related to the condition, the output study of toxicity potential test carried out to coal ash in Nagan Raya PLTU (Electric Steam Power Plant) proving conversely. The coal ash of Nagan Raya PLTU is relatively safe to be used as construction material. The output explained that coal ash of Nagan Raya PLTU have adequate good potency to be utilized. One of coal ash potencies developed is the utilization asphalt mixture material including bottom ash as fine aggregate substitution and fly ash as filler substitution. The research aimed to find out the mixture characteristic by utilizing FABA for the road pavement of asphalt concrete layer (AC-WC) to reduce environment pollution and detect the appropriate proportion for the optimal utilization. The percentage of fine aggregate in the mixture must meet the requirement of binder as 5-15% to the weight, while the filler must meet the minimum of 75% to weight of filter pass No. 200 (0.075 mm). The test output of both mixtures by using bottom ash and fly ashin 15%-30% variation was different. The output is similar. Both of the output concluded that the optimum asphalt level was 5% and the variation of 30% bottom ash : 70% fine aggregate meet the requirement specification, while variation fly ash as subtitution Portland cement resulting that all the parameters meet the specification required by Bina Marga specification 2018.

Biodegradation of Wastes using Partially Purified Cellulose-Enzyme from Gut of Oryctes rhinoceros larvae from Rafia Palms in Itokin, Lagos State, Nigeria

Conversion of urban wastes to utilizable sugars is very important as a vital step towards reduction of environmental pollution. Consequently, this work was aimed at obtaining cellulase from the gut of Oryctes rhinoceros larvae from raffia palms in Itokin, Lagos State, Nigeria to evaluate its degradability potential on different plant leaves and selected plastic bottles. Cellulase from Oryctes rhinoceros larvae was partially purified by a combination of precipitation with ammonium sulphate and fractionation with gel filtration on Biogel P- 100. The cellulase degradability potential was examined on tree leaves from cashew, banana, maize, lemon, cassava, pawpaw, mango, almond and palm respectively, while the plastics were from bottles of teem,pepsi, eva, mirinda, cascade, still, coke, devana and nestle respectively. Data obtained show that the enzyme- cellulase has a specific activity of 2.38 Unit/mg with 32% yield with higher degradability potential on samples from plant origin than the materials from industrial wastes.

What's at Stake? The empirical importance of government revenue and debt and renewable energy for environmental neutrality in the US economy

Environmental taxes and pollution reduction have been the subject of several studies. By factoring the costs of pollution and other environmental costs into pricing, environmental taxes assist in correcting erroneous price mechanisms in the marketplace. It did, however, overlook the government's potential to facilitate the use of efficient energy sources, which is critical for environmental neutrality. The competence of a government is determined by its tax revenues, which allow the state to participate more in renewable energy technologies, offer an excellent opportunity to reduce greenhouse gas emissions and global warming by replacing traditional energy sources. To that aim, the impact of government revenues and debts, as well as renewable energy on environmental neutrality in the United States, is the only motive to conduct this research. A significant outcome of the renewable energy-environment nexus is revealed by tax revenue and debt. Since there seems to be no causation in the first moment, but higher-order interconnectedness emerges, as the quarterly data from 1990Q1 to 2020Q4 has been obtained to test for causality-in-mean and causality-in-variance employing novel non-parametric causality-in-quantiles algorithms. The findings reveal that renewable energy consumption and financial depth have significant predictive power for ecological footprint, uncovering asymmetric prediction across ecological transmission. Also, tax revenues and government debts found a significant connection and predictive potential in estimating the environmental footprint level. Thus, out of multiple suggestions, the study suggests that the government push tax reform policies to obtain investment in renewable energy sources. This shift toward renewable technology innovation allows the US to go green and retain environmental sustainability, which is also an utmost urgency of the UN's Sustainable development Goals (SDG-7).

Numerical evaluation of heat irreversiblity in porous medium combustion of third-grade fluid subjected to Newtonian cooling

Understanding combustion efficiency and reduction of environmental pollution are one of the main challenges encountered in porous medium combustion in many industrial and chemical engineering applications in recent times. In this regard, we present a numerical investigation of the thermal stability of the process and inherent irreversibility analysis for combustible third-grade fluid through a non-Darcian porous medium. The heated fluid flow is assumed to flow steadily through parallel Riga plates with asymmetrical convective cooling. The equations governing the flow are formulated and converted to a set of nonlinear Boundary-value problems by dimensional analysis. The dimensionless equations are solved numerically by spectral Chebyshev collocation method and validated with Shooting-Runge-Kutta method. Graphical and tabular illustrations are provided with sufficient explanations for the velocity, temperature, entropy generation, and irreversibility ratio profiles.

Synergy effects of Mo2C and AC on the structure and catalytic performance of Mo2C/AC for NO2 to NO

AbstractBackgroundResearch on catalysts for the efficient conversion of NO2 to NO is of great significance for the accurate determination of NO2 concentration and the reduction of environmental pollution. The present work investigated the synergistic interaction between coconut shell activated carbon (AC) and Mo2C, along with the catalytic performance of NO2 to NO. The aim of this study was to prepare a composite catalyst with activated carbon as the support to improve the conversion of NO2 at low temperatures. The effect of Mo loading w(Mo) on the reaction performance of NO2 to NO was studied by technical analysis, and the internal mechanism of Mo2C/AC for improving the reaction activity of the catalyst was revealed to provide a reference for the development of new efficient NO2 converting agents.ResultsCommercially available Mo2C, AC, and Mo2C/AC catalysts can convert NO2 to NO under reaction test conditions. When the gas flow rate is 1.5 L/min and the temperature is 250°C, the NO2 conversion rates of 5‐Mo2C/AC, 10‐Mo2C/AC, 15‐Mo2C/AC, and 20‐Mo2C/AC are 96.1%, 97.8%, 97.0%, and 93.2%, respectively. The NO2 conversion rates of 10‐Mo2C/AC is about 4 times that of Mo2C and 1.1 times that of AC at 250 °C.ConclusionThe Mo2C/AC catalyst is rich in micropores and provides a reaction vessel for the conversion of NO2 to NO. AC with high specific surface area can not only change the dispersion and particle size of Mo2C species on the catalyst surface, but also adjust the NOx desorption performance of the catalyst. The synergism between the AC and Mo2C of Mo2C/AC provides more active sites for NO2 to NO, improving the reaction performance of the catalyst. © 2023 Society of Chemical Industry (SCI).

CO2 sequestration and biodiesel production from Volvox aureus a newly isolated green microalgal species from industrial wastewater

Recently, large-scale biofuel production is mainly dependent on third-generation feedstock, especially microalgae. Since most microalgae can sequester carbon dioxide and utilize it for the enhancement of their growth parameter. In the present study, CO2 sequestration and Biodiesel production from Volvox aureus a newly isolated green microalgal species from industrial wastewater. Volvox aureus was isolated from the wastewater sample collected from the sewage treatment plant. The isolated V.aureus was grown in the BBM culture containing excess nutrients along with Artificial CO2 supply to the bioreactor. The addition of an external carbon dioxide source enhanced the total lipid content by up to 27.95%. Further, the lipid was extracted using soxhlet extraction from the isolated microalgal biomass. The extracted lipid was converted into biodiesel using a base catalyst potassium hydroxide. The produced biodiesel was analyzed to test their fuel properties and compared with the diesel standard. This study approach investigated the potential of a future possible environmental pollution reduction and significant potential for a viable biofuel production from microalgae.

A reverse distribution between synergistic effect and economic development: An analysis from industrial SO2 decoupling and CO2 decoupling

Under the dual pressure of global ecological degradation and economic downturn, an important task for emerging industrialized countries is to balance the connection between the economy and the environment. To achieve CO2 reduction and pollution reduction in China, the trend and causes of decoupling both CO2 and SO2 from economic growth were evaluated. Then, the synergistic effect of two decoupling indices was investigated by spatial econometric model, i.e., Geographically and Temporally Weighted Regression (GTWR). The analysis results show that: (1) Per capita GDP and energy intensity were the main positive contribution and negative contribution, severally. (2) There have been variations within the ranking of the sensitivity of two decoupling indices to each influencing factor. Emission coefficients, energy mix and energy intensity are highly sensitive in most regions. For decoupling index of CO2, the sensitivity was higher in eastern regions, however, the sensitivity of decoupling index of SO2 was the contrary. (3) There was spatial and temporal heterogeneity within the synergistic effect. The effect in the western region is higher than that in the eastern region, different from economic development, especially in Xinjiang province, where increasing the decoupling effort of CO2 by 1 unit can reduce the decoupling index of SO2 by 0.50 in 2018. (4) According to the trend of the synergistic effect, six sectors could be defined, where sector “e” should be the focus of attention, with an average coefficient of −0.33. After 2016, the effect in sector “d”, sector “e” and sector “f” tends to increase. The findings not only facilitate the present literature on synergistic reduction of environmental pollution, but also be of interest to policy-makers in emerging industrialized countries.

Dynamics of a PDE model with size-structure: Characterizing the growth and flocculation effects of unicellular algae

The commercial production of algae is of great practical significance to the reduction of environmental pollution, the development of bioenergy and nutritional food. Heterotrophic culture is one of the most important methods in commercial production of algae, and flocculation is usually used to collect algae cells in the reactor. The size of algae cells has a direct impact on the nutrient absorption and the flocculation effect of algae cells. In this paper, a size-structured PDE model considering the size of algae cells is established, which depicts the evolutionary relationship of the growth of algae cells, the nutrient absorption and flocculation effect. In the construction of the model, it is assumed that the number of newborn algae cells is determined by nutrition and the weighted total number of algal cells. The numerical observation shows that the model has complex dynamics, such as the appearances of the backward bifurcation of equilibrium states and bistability. The main theoretical results are as follows: (1) The well-posedness of the solution is obtained by using the fixed point theorem. (2) Under the condition of threshold quantity R0>1, the existence of the coexistence equilibrium state of algae is analyzed. Then, by using the theory of contraction semigroups, the sufficient condition for the local stability of the coexistence equilibrium state of algae is obtained. (3) Sufficient condition for the global stability of the algae-free equilibrium state is given.

Innovative solutions in the energy sector

Combined heat and power plants (CHPPs) allow for significant savings in primary energy resources and a reduction in environmental pollution. Mostly it is carried out using steam turbines. However, in the eighties of the twentieth century, a new promising direction in the development of cogeneration appeared. These are plants operating on the organic Rankine cycle (ORC). An analysis of energy innovations abroad is required for the development and adaptation of this direction to Russian realities. Therefore, an analysis of the energy and environmental efficiency of high-moisture biofuels and biofuel mixtures with high ash content was carried out in boilers operating as part of a CHP using ORC technology and traditional steam turbine plants. Some recommendations for the innovative development of small and medium-scale power generation were proposed.

Флотационное обогащение вольфрамовых руд в условиях замкнутого водооборота

The technological processes of enrichment are based on the consumption of a large amount of water from ore processing to the production of finished products. Water is an integral participant in enrichment, and its quality directly affects the level of extraction of the useful component and the quality of the products obtained during the enrichment process. One of the main socio-economic problems is the conservation of water resources and the reduction of environmental pollution. The solution to this problem is to reduce the consumption of fresh water in technological processes and increase the degree of water turnover at industrial enterprises. The object of the study is the process of flotation enrichment of relatively poor tungsten ore, with an initial content of a valuable component of 0.35–0.42 %. The purpose of the study is to search for new technological solutions in conditions of closed water circulation to reduce the consumption of fresh water and ensure a satisfactory level of extraction and quality of final products. Research objectives are the following: selection of the optimal flotation regime in conditions of a closed water circulation, localization of the area of impurity concentrations and determination of the maximum concentrations of components at which their effect on extraction is within acceptable limits, establishment of the necessary conditioning modes. The significance of the research lies in the need to find new technological solutions in a closed water cycle to reduce the consumption of fresh water and ensure a satisfactory level of extraction and quality of the final products. This article examines the relevance of the problem arising during the processing of tungsten calcium-containing ores in the conditions of water circulation. According to theoretical and experimental studies, it was found that without pre-conditioning of recycled water, the technological indicators of enrichment are significantly reduced, so, for example, the extraction of a valuable component in a closed water cycle is reduced from 80 to 40 %. This is due to the accumulation of a significant amount of carbonates and silicates in the recycled water. These indicators do not meet the requirements and are the basis for the search for new technological solutions. Based on this, a three-stage experiment was conducted, which allowed determining the maximum concentrations of harmful impurities. It is revealed that the maximum concentration of silicates depends on the carbonate background of the waters. The obtained data of experimental studies on the pre-conditioning of circulating waters satisfy the required qualitative and quantitative indicators. Two methods of conditioning have been developed – chemical and physico-chemical.

ТЕХНОЛОГИЯ УДАЛЕНИЯ НЕФТЯНЫХ РАЗЛИВОВ С ПОМОЩЬЮ СОРБЦИОННОГО МАТЕРИАЛА НА ОСНОВЕ ХИТОЗАНА И ПЕНОПОЛИУРЕТАНА

Chitin-containing materials were most widely used in wastewater treatment. In production processes accompanied by the release of proteins, chitosan is used as a flocculant in the treatment of contaminated wastewater. Using chitosan, metals are extracted from mining waste. The introduction of chitosan into the soil leads to the removal of scattered heavy metals and radionuclides from the natural cycle.There are a number of patents in the field of water treatment using chitosan. However, there is much less work on the use of chitin and chitosan as a sorbent for oil and oil products. Alaa Eldin Muhammad Younes et al used chitin and chitosan to remove Tengiz oil spills from the water surface. At the same time, oil with chitin formed clots, which eventually (~ 2 hours) precipitated. On the contrary, chitosan forms floating clots, which contributes to their extraction. The authors on the model systems determined the flow rates for the collection and removal of oil film from the surface of 1 m2. This is 0.16 kg of chitin or chitosan with an amount of 10% of the sorbent based on the weight of the oil film. It has been suggested that extractable products can be used in asphalt concrete pavements. A high degree of water purification (up to 99.8%), and almost complete purification of waters containing oil emulsions makes it possible to recommend it as a highly effective flocculant with its content of 0.0028. It is characteristic that chitosan works better with a high oil content in water. However, efficient recovery of chitosan with absorbed oil remains an unresolved issue. In this case, oil flows from the sorbent, leading to secondary pollution. The invention proposes a method of oil and petroleum product spill response and purification at water bodies, as well as reduction of environmental pollution by waste water of industrial enterprises with the help of highly efficient, economically justified sorption material based on chitosan and semi-rigid polyurethane foam and a technological process of its production. Sorption material using crushed chitosan soluble in acid in amount of 30% of total weight and elastic polyurethane foam PPUel-30-HC has optimal absorption capacity of ~ 14.0 g/g at weight ratio of sorption material components A: B: chitosan = 1: 0.6: 0.48. The environmental friendliness of the developed sorption material is confirmed by the possibility of its repeated use up to 19 times after squeezing the absorbed product without significant changes in oil capacity. Disclosed is a technological scheme for producing a developed sorbent named Grinsorb X and a method for eliminating oil spills using it.

Increasing the level of safety and occupational hygiene during the ecologically oriented processing of leather industry waste and the peculiarities of their microstructure

The article is devoted to the study of the peculiarities of the microstructure of cinders from leather industry waste. This is necessary for the use of the obtained material as a chromium-containing raw material for the production of alloying additives by aluminothermic melting. To achieve this goal, a complex of the latest research methods was applied using raster electron microscopy together with X-ray microanalysis to determine the chemical composition of the target areas of the surface of the samples. Thanks to the successfully conducted stages of research, significant results were obtained with the determination that the cinder microstructure was disordered, porous and consisted of separated particles of different shapes and sizes. The oxide nature of the majority of the components is due to the detection of oxygen in the analysis areas in the range of 14.04-25.12 %wt. In the studied areas, the chromium content was at a relatively high level — from 59.49 %wt. up to 74.64 %wt. Of the refractory elements, vanadium was also present in the amount of 0.18-0.29 %wt. The iron content ranged from 0.41 to 0.62 %wt. At the same time, some content of accompanying impurities Ca, Mg, Al, Na, Si, Cl, Mn, K, as well as S and P was found in the cinder — in the amount of 0.55-1.52 %wt. and 0.12-0.21 %wt. in accordance. This made it possible to draw a number of important practical conclusions that the obtained product requires the use of aluminothermic refining smelting for further effective use as an alloying chromium-containing additive. At the same time, cinders from leather production waste can be added instead of part of the chromium-containing ore concentrate when smelting ferrochrome. At the same time, the processing and return to production of technogenic waste from leather production ensures an increase in the level of safety and occupational hygiene, a reduction in environmental stress in industrialized areas, a reduction in environmental pollution and an increase in the safety of life.

Friction heat energy recovery system based on hydraulic brake system by wire of heavy vehicle

In order to reduce fuel consumption and environmental pollution, the author proposes a friction heat recovery system based on the hydraulic brake by wire system of heavy-duty vehicles, the system uses the heat energy generated by friction generate electricity, and stores the electric energy in the vehicle battery. This can provide power for the lighting equipment on the vehicle. The experimental results show that after using the recovery system, the braking energy consumption is reduced, and the fuel consumption is 10% less than before, which fully demonstrates the effectiveness of the recovery system for energy conservation, and proves that the heat energy recovery system can effectively reduce fuel consumption and reduce environmental pollution.

Community-Based Eco-Friendly Village Governance in Purwosari, Surakarta, Indonesia

Urban villages are an important entity and the need of urban people spatially and socially, but some of them are not eco-friendly. This research analyses the Community-based Eco-friendly Village Governance in Purwosari, Surakarta, Indonesia using Schweitzer’ s Life-Centered Theory of Environment. In this case study research, data and information were obtained through observation, documentation, in-depth interview and Focus Group Discussion with Purwosari villagers, Living Environment Service Office of Surakarta City, and an NGO caring about environment. Following source triangulation, data was analyzed using an interactive model. Result shows the active participation of Purwosari villagers in planning, training, facilitation, follow-up, and evaluation on environment management to reduce environment pollution and damage to achieve eco-friendly residence jointly. They manage, use, and process used plastics into useful products with economic value to surrounding environment such as bag, wallet, tissue box, frame, multifunctional basket, sandal, and glass. They make yard a hydroponic farmland with diverse plants like chili, tomato, and sprout. They connect drainage system from one house to another with concentrated channel model ending up in a river. Systemic participative collaborative attempts are taken by Purwosari villagers to anticipate flood and environment pollution to achieve liveable village.

FINANCIJSKI RAZVOJ I POTROŠNJA ENERGIJE U NIGERIJI

The study examined the effect of financial development on energy consumption in Nigeria from 1990 to 2020. The study made use of secondary data and the data was analyzed using the Non-linear Autoregressive Distributed Lag Model (NARDL). Domestic credit to the private sector was used to measure financial development, while fossil fuel energy and renewable energy consumption were used to measure non-renewable and renewable energy respectively. Other variables included Gross domestic product, interest rate, and inflation. The study revealed that domestic private credit had a significant and negative impact on non-renewable energy only in the short run while changes in domestic credit had a significant and positive impact on renewable energy in Nigeria. This shows that the efforts of the financial sector so far in Nigeria have encouraged the consumption of renewable energy which therefore translates that the financial sector in Nigeria has a significant role to play in achieving Goal 7 target agenda of affordable and clean energy of the sustainable development. The study, therefore, recommends proper mobilization of funds from the financial sector towards investment in renewable energy considering the growing need for alternative energy sources in Nigeria. Also, policies that will discourage the use of non-renewable energy sources but encourage the use and affordability of renewable energy in Nigeria should be considered so that a reduction in environmental pollution, as well as improved health status, can be achieved.

Quantifying the importance of feed-in tariffs to wind power development in China.

Governments worldwide often provide subsidies to renewable energy for reasons such as climate change mitigation and environmental pollution reduction. However, the importance of such subsides is not well understood and much debated. In this study, 109 monthly observations of the installed wind power capacity at the provincial level were used to assess the most important wind power subsidy policy in China-feed-in tariffs, while controlling for other confounding factors, such as technological change, local energy mix, and wind curtailment. The long panel regression results indicate that with other factors unchanged, an increase of 0.1 yuan/kWh in feed-in tariffs added 7.4-9.6 GW of wind capacity to China's national wind power market annually, higher than most of the estimates in the literature, but more consistent with the fast wind capacity development in China. Without the FIT subsidy, China's current wind power market size would likely be approximately 80% smaller. Our findings can be used to predict the impact of future cost reduction of wind technologies, and examine the interconnected relationships between wind capacity development, subsidy burden, and wind curtailment issues.

Environmental Efficiency Analysis of Basmati Rice Production in Punjab, Pakistan: Implications for Sustainable Agricultural Development

The intensive use of chemicals worked as a catalyst to shift the production frontier but the most critical factor of maintaining a clean environment was totally ignored. The present study attempts to estimate the environmental efficiency of rice production by employing the translog stochastic production frontier approach. The data are collected from five major Basmati rice growing districts (Gujranwala, Sheikupura, Sialkot, Hafizabad, and Jhang) of Punjab in 2006. Chemical weedicides and nitrogen are treated as environmentally detrimental inputs. The mean technical efficiency index is sufficiently high (89 percent) but the environmental efficiency index of chemical weedicides alone is 14 percent while the joint environmental efficiency index of chemical weedicides and nitrogen is 24 percent implying that joint environmental efficiency is higher than chemical weedicide alone. It indicates that substantial reduction (86 percent) in chemical weedicide use is possible with higher level of productivity. Moreover, it is likely to contribute a considerable decrease in environmental pollution which is expected to enhance the performance of agriculture labour. The reduction in chemical weedicides will save Rs 297 per acre and Rs 1307.3 million over all from the rice crop in Punjab, improving the profitability of rice growing farmers by the same proportion. Empirical analysis indicates that reduction in environmental pollution together with higher level of profitability in rice production is achievable. JEL classification: N5, O13 Keywords: Rice Production, Environmental Efficiency, Weedicide, Fertiliser (NPK), Stochastic Translog Frontier

Model for port service quality and intermodality assessment applying fuzzy logic

Port terminals, as the starting and ending points of the technological process in the transport of goods, are also logistic centers for the provision of services of loading/unloading and storage of goods. Improving the process of transporting goods and achieving competitiveness is not possible without quality port service and customer satisfaction with the service provided, and reduction of traffic congestion and environmental pollution within the guards in which the ports are positioned. This scientific research aimed to analyze, using scientific methodology, the factors influencing the assessment of port service quality and intermodality in the Port of Rijeka and to develop a model for port service quality assessment by implementing fuzzy logic. The model was tested by simulation based on the evaluation of the criteria of influential parameters with inaccurate and indeterminate input data. The test results provide an assessment of the quality provided by port service and intermodality. The results of the research will be used to improve the transport service planning process to achieve greater competitiveness for the port.

INNOVATIVE TECHNOLOGIES FOR THE APPLICATION IN VINEYARDS AND ORCHARDS OF SPRAYING TREATMENTS WITH REDUCED IMPACT ON THE ENVIRONMENT. PRESENT AND PERSPECTIVES

The paper presents an analysis of the innovative technologies that are currently implementing spraying treatments with the reduction of specific consumption of pesticides, fuel, labour and especially the reduction of environmental pollution. They are presented for the administration of insecticides-fungicides and liquid fertilizers with machines for spraying vines and orchards of the carried type with a tank of 300-600 litres and of the trailed type with a tank of 600-2000 litres, which have standard fans or a tower with controlled spraying, 600-800 mm propellers with adjustable pitch, hot-dip galvanized metal parts, bronze nozzle holder, cardan shaft, etc. The work concludes with the recommendation of using an innovative spraying machine that allows significant savings of active substance, depending on the vegetative phase of the plantation at the time of spraying compared to conventional treatment.

Use of nanobubble water bioaugmented anaerobically digested sludge for high-efficacy energy production from high-solids anaerobic digestion of corn straw

An increasing attention has been paid to the secure and sustainable management of agricultural wastes, especially lignocellulosic biomass. Nanobubble water (NBW) contains 106–108 bubbles/mL with diameter <1000 nm. Although previous studies have examined the enhancement effects of NBW on methane production from organic solid wastes, the NBW-based anaerobic digestion (AD) system is still restrained from practical application due to the large increase in AD reactor volume, generation of wastewater, and increase in energy consumption as well. In this study, NBW bioaugmentation of anaerobically digested sludge for the first time was performed for high-solids AD of corn straw. Results show that cellulase, xylanases and lignin peroxidase activities were increased by 2–55% during the NBW bioaugmentation process. Significant enrichment of hydrolytic/acidogenic bacteria and methanogenic archaea were noticed in the NBW bioaugmented sludge. This study clearly demonstrated 47% increase in methane production from high-solids AD of corn straw when O2-NBW bioaugmented sludge was applied, achieving a net energy gain of 5138 MJ/t-volatile solids of corn straw with an energy recovery of 34%. The NBW-based high-solids AD system can provide a novel and sustainable management solution for renewable energy production from agricultural wastes, targeting the reduction of environmental pollution and energy crisis.