Tannery Industry Research Articles

A Study of Export Barrier in Garut Leather Tannery Industry

The economic development of a country currently cannot be separated from the condition of global economy. Economic relations between country is an influencing factor for the development of both country involved. Therefore, export activity of an industry is very important for the development of a country’s economy. Based on data obtained through the Ministry of Trade of the Republic of Indonesia, export distribution in the form of footwear is 86%, leather finished goods are 13%, and leather is 1%. According to these data, it can be seen that the contribution of the leather tanning industry which is included in Leather Goods is very small in the total export distribution of leather. Meanwhile, by carrying out export activities, the leather industry will benefitted because it will open access to new customers who will have the potential to increase revenue and long-term growth. The data for this research was collected through 52 factory owners in this industry. After the data has been collected, an exploratory factor analysis was conducted to see how many factors become the barrier of exporting in Garut leather tannery industry. The result of this research is there are three factors that become the barrier to do export in Garut leather tannery industry, namely functional, international and governmental barriers. Meanwhile the result of descriptive analysis shows that Garut leather tannery industry perceive high cost of capital to finance exports, difficulties in organizing promotional activities abroad, and lack of financial resources to conduct market research in overseas markets as the barrier to do export activities. The findings suggest that the government should support both the knowledge and infrastructure regarding export for all the business owners in Garut leather tannery industry, meanwhile the business owners should also be active in searching for business opportunities in international market. For future studies, it was suggested to consider management’s entrepreneurship capabilities as a factor that can hinder exports.

A Study of Export Barrier in Garut Leather Tannery Industry

A Study of Export Barrier in Garut Leather Tannery Industry

Optimization and Modeling of Cr (VI) Removal from Tannery Wastewater onto Activated Carbon Prepared from Coffee Husk and Sulfuric Acid (H2SO4) as Activating Agent by Using Central Composite Design (CCD)

The primary goal of this research is to lower the hexavalent chromium (Cr (VI)) concentration that has occurred from the growth of the tannery industry. As a result, the potential for heavy metal concentration is increasing day by day. Industrial effluent containing Cr (VI) contributes significantly to water pollution. Chromium hexavalent ion (Cr (VI)) in wastewater is extremely hazardous to the environment. It is critical to address such a condition using activated carbon derived from biomass. Adsorption is one of the most successful methods for removing hexavalent chromium from wastewater. Treated wastewater has no substantial environmental contamination consequences. The ash content, moisture content, volatile matter content, and fixed carbon content of wet coffee husk were 3.51, 10.85, 68.33, and 17.31, respectively. The physicochemical properties of coffee husk-based activated carbon (CHBAC) obtained during experimentation were pH, porosity, the yield of CHBAC, bulk density, point of zero charges, and specific surface area of 5.2, 58.4 percent, 60.1 percent, 0.71 g/mL, 4.19, and 1396 m2/g, respectively, indicating that CHBAC has a higher capacity as an adsorbent medium. For optimization purposes, the parameters ranged from pH (0.3–3.7), dose (2.3–5.7) g , and contact time (0.3–3.7) hr. The quadratic models were chosen for optimization, and the p value for the model was significant since it was less than 0.05, but the lack of fit model was inconsequential because it was more than 0.05. The optimum adsorption obtained with numerical optimization of Cr (VI) was 97.65 percent. This was obtained at a pH of 1.926, a dose of 4.209 g/L, and a contact time of 2.101 hours. This result was observed at a pH of 1.93, a dosage of 4.2 g/L, and a contact duration of 2.1 hours. The desirability obtained during numerical optimization was 1. Coffee husk-based activated carbon has a bigger surface area, and it has a stronger ability to absorb hexavalent chromium from tannery wastewater effluents.

Impact of Environmental Pollution on the Residents of Sharada from Tannery Industries, Kano, Northwestern Nigeria

Environmental pollution has become a worldwide challenge due to industrialization and anthropogenic activities. Industrial effluents cause a wide scope of environmental problems with health hazards and these challenges are more complex and critical now than before, in developing countries like Nigeria. This study assessed the impact of environmental pollution and determined levels of heavy metals (HMs) in the effluents from tannery industries in Sharada phase I and II. The data used include laboratory test to determine heavy metals (Cd, Cr, Cu, Pb, Zn, Ni, Mn, Fe), Electrical Conductivity (EC) and Total Dissolved Solid (TDS) from industrial effluents. Interview was conducted and systematic field observation was employed to ascertain the perceptible impacts of the pollution on the environment. The finding reveals that concentrations of the physicochemical parameters are within the FEPA acceptable limits but the EC and TDS are above the limit. The pH value of the effluents is neutral. The major conspicuous and dangerous environmental challenges in the study area include air pollution and open drainages. The economic activities of the residents are negatively affected due to stink from the effluents and untidy environment. The environment has become detrimental to people’s health and the passerby. Thus, Federal Environmental Protection Agency (FEPA) laws should be enforced, the industries should construct closed drainage, study on environmental impact assessment (EIA) should be conducted often to curtail the environmental challenges in the area in order to make the environment conducive for living, avoid further deterioration and ensure a sustainable hygienic environment.

Synthesis of Carbon from Rice Groats at Various Pyrolysis Temperatures and Its Application for the Recovery of Chromium Wastewater from the Tannery Industry

The research on synthesis of carbon from rice groats at various pyrolysis temperatures and its application for the recovery of chromium wastewater from the tannery industry by varying pyrolysis temperatures at 300, 400, and 500 °C. The results of carbon synthesis are analyzed in the form of determination of yield, water content, ash content, and iodine number. The best pyrolysis condition with the quality requirement of carbon is at a pyrolysis temperature of 500 °C with 760 mg.g-1 (iodine number). Adsorption kinetics was also carried out to determine the adsorption kinetics of chromium ions from tannery wastewater. Adsorption kinetics model of chromium wastewater from the tannery industry corresponds to the pseudo-second-order kinetics model with R2 is 0.9857, k2 is 0.0093 g.mg-1.min-1, and qe is 28.5714 mg.g-1.

Analysis of Heavy Metals using ICP-MS in Soils around some Tannery Industries

Analysis of Heavy Metals using ICP-MS in Soils around some Tannery Industries

Dual step synthesis of chromium removal from tannery industry wastewater with photocatalytic effects of TiO2

Dual step synthesis of chromium removal from tannery industry wastewater with photocatalytic effects of TiO2

Cadmium Content in Soil and Tomato (Lycopersicon Esculentum Miller) Around Industrial Areas of Bangladesh

The levels of cadmium (Cd) in soil and commonly consumed tomato (Lycopersicon csculentum Miller) fruits grown around the industrial areas of Dhaka and Narsingdi districts of Bangladesh were quantified and compared the levels with FAO/WHO (2003)safety limits. According to the findings, the order of Cd concentration in soils and tomato fruits was found around the Textile > Pharmaceutical > Tannary industry. The concentration (mg/l) of Cd in soil and tomato ranged from 0.24 to 0.91 and 0.15 to 0.74, respectively. Except Tannery industry levels of Cd in soil and tomato were exceeded the premise limit proposed by joint FAO/WHO. In all sites, the bioconcentration factor (BCF) for this heavy metal in tomatoes was found to be below 1, a sign of low uptake of heavy metals in the tomatoes from the soil. Results suggest that consumption of these tomatoes might cause health risk the consumers. Bangladesh J. Bot. 51(4): 729-736, 2022 (December)

Bioremediation of hexavalent chromium by transformation of Escherichia coli DH5α with chromate reductase (ChrR) genes of Pseudomonas putida isolated from tannery effluent.

Hexavalent chromium Cr(VI), a toxic heavy metal, is a serious pollutant of tannery effluent, and its accumulation in soil and water causes severe environmental concerns of increasing public health issues. The present study focus on the isolation and identification of chromium-reducing bacteria collected from the tannery industry in Dindigul, Tamil Nadu. Chromium-reducing bacteria Pseudomonas putida were identified by 16S rRNA sequencing followed by BLAST search. The plasmid with Cr(VI) reductase gene was isolated from Pseudomonas putida and transferred to E. coli DH5α for further studies. The bacterial cultures were kept under controlled conditions for 72h to observe the growth rates and bacterial resistance to chromium. When strains wild type and transformant E. coli DH5α were grown in chromium supplemented media revealed significant growth, but strains cured type Pseudomonas putida and E. coli DH5α were minimum growth. The Cr(VI) reduction employed by transformant E. coli DH5α and wild Pseudomonas putida was 42.52±1.48% and 44.46±0.55%, respectively. The culture supernatant of the wild Pseudomonas putida and transformant E. coli DH5α showed an increased reduction of Cr(VI) compared to cell extract supernatant and cell debris due to the extracellular activity of chromium reductase has been responsible for Cr(VI) reduction. Besides, the chromium reductase gene was confirmed in the isolated Pseudomonas putida and transformant E. coli DH5α. Transformant bacteria could employ an alternative method for heavy metal detoxification in contaminated environments like tannery effluent and mining processes.

Assessment of chromium contamination in the soil and khat leaves (Catha edulis Forsk) and its health risks located in the vicinity of tannery industries; A case study in Bahir Dar City, Ethiopia

Industrial effluents containing trace metals can contaminate water, soil and plants, as well as can cause serious human health impacts. The aim of this study was to assess the concentration of chromium in the soil and khat leaves using spectroscopic methods and to evaluate its potential human health risk on the consumers. The average concentrations of total chromium in the soil samples ranged from 71.01 ± 12.05 to 317.55 ± 23.14 mg kg−1. These values were greater than the control (7.6 ± 0.47 mg kg−1). The average concentrations of total Cr in the khat leaves ranged of 6.5 ± 1.76 to 30.01 ± 2.91 (mg kg−1). These values were higher than the maximum permissible Limits in vegetables 2.3 mg kg−1. The estimated daily intake (EDI) of an adult man weighing 70 kg and consuming on average 100 g of khat leaves per day was found in the range of 0.200–0.454 mg kg−1 body weight day−1. The target hazard quotient (THQ) of Cr from khat leaves consumption was found in the range of 0.001–0.076, which were <1, indicating no potential non-carcinogenic harmful health risk to the consumers in the society. Despite this, the regional EPA must pay close attention to controlling the use of irrigation water contaminated with tannery effluents in order to safeguard khat consumers. Furthermore, consumers must be aware of the health risks and refrain from consuming khat leaves cultivated in the study areas.

Biosorbent Efficacy of Groundnut Husk for the Elimination of Chromium from the Effluent of Mojo Tannery Industry, Ethiopia.

The present study aimed to assess the effects of raw (RGNH), ethanol-extracted (EEGNH), and acid-treated (ATGNH) groundnut (Arachis hypogaea L.) husk for removal of chromium from tannery effluent from the Mojo tannery industry, Ethiopia. The effects of biosorbent dose, agitation speed, and contact time of heavy metal on biosorbent were measured. The percentage removal of chromium was examined by a flame atomic absorption spectrophotometer (FAAS). Functional group characteristics of the biosorbents were analyzed using Fourier transform infrared spectra (FTIR). The results indicated that at low doses (2 g), acid-treated groundnut husk (ATGNH) exhibited the highest removal efficiency (89.93%), whereas at a high dose (4 g), the raw groundnut husk (RGNH) has a potential removal efficiency (91.03%). The least removal efficiency was displayed by ethanol-extracted groundnut husk (EEGNH) (65.43%) at a dose of 3 g. Relating to the contact time, the highest chromium removal (94.41%) was exhibited by ATGNH with a 1-hour contact time. However, as contact time increased from 2 to 4 hours, there was a general decrease in the efficiency of biosorption. The removal of chromium by RGNH and EEGNH increased as contact time increased from 1 to 3 hours. The highest chromium removal (90.02%) was observed with ATGNH at 160 rpm agitation speed.

Effective removal of Cr (VI) ions using low-cost biomass leaves (Sambucus nigra L.) in aqueous solution.

The tannery industries have become an important part of societal growth; however, these processes have produced huge volumes of effluents containing heavy metals, particularly Cr(VI) oxyanions. The study is crucial and cost-effective for reducing the chromium (VI) from industrial wastewater. In order to meet the sustainable development goal (SDG) objective 6.3, the capacity of Sambucus nigra L. to adsorb heavy metal is established with the purpose of eradicating hazardous chemical contamination and reducing pollution. In this study, discontinuous tests were carried out to determine the efficiency of Cr(VI) sorption on leaves of Sambucus nigra L. Adsorption factors such as pH, temperature, adsorbent dosage, and contact time were evaluated. At a dosage of 3g/L and pH 2, an efficiency of 98.22% was achieved under favorable conditions. The equilibrium and kinetic models that best fitted the experimental data are non-linear Freundlichand; pseudo-second order, and intra-particle diffusion, respectively. The thermodynamic parameters of the adsorption process, including Gibbs free energy (ΔG0), enthalpy (ΔH0), and entropy (ΔS0), were measured at 291, 303, 323, and 343K, indicating that the phenomena was spontaneous and endothermic. The chemical analyses and surface morphology of the adsorbent were analyzed using SEM (scanning electron microscopy), EDS (energy dispersive spectroscopy), FTIR (Fourier transform infra-red), XRD (X-ray diffraction), and ICP-OES (inductively coupled plasma optical-emission spectroscopy) techniques. The results showed that Sambucus nigra L. has a significant removal efficiency of Cr(VI) in the contaminated solutions, establishing adsorbent as a low cost, readily available, and environmentally friendly and ensuring its potential for industrial usage.

Biological Solubilisation of Leather Industry Waste in Anaerobic Conditions: Effect of Chromium (III) Presence, Pre-Treatments and Temperature Strategies.

Collagen-based polymers and their blends have attracted considerable interest for new materials development due to their unique combination of biocompatibility, physical and mechanical properties and durability. Leather, a modified natural biopolymer made from animal rawhide and the first synthetic collagen-based polymer known since the dawn of civilization, combines all these features. Rawhide is transformed into leather by tanning, a process in which the collagen is cross-linked with different agents to make it stronger and more durable and to prevent its decay. Research on the development of environmentally friendly procedures and sustainable materials with higher efficiency and lower costs is a rapidly growing field, and leather industry is not an exemption. Chrome-tanned and vegetable-tanned (chromium-free) shavings from the leather industry present a high content of organic matter, yet they are considered recalcitrant waste to be degraded by microbiological processes like anaerobic digestion (AD), a solid technology to treat organic waste in a circular economy framework. In this technology however, the solubilisation of organic solid substrates is a significant challenge to improving the efficiency of the process. In this context, we have investigated the process of microbial decomposition of leather wastes from the tannery industry to search for the conditions that produce optimal solubilisation of organic matter. Chrome-tanned and chromium-free leather shavings were pre-treated and anaerobically digested under different temperature ranges (thermophilic-55 °C-, intermediate-42 °C- and mesophilic-35 °C) to evaluate the effect on the solubilisation of the organic matter of the wastes. The results showed that the presence of chromium significantly inhibited the solubilization (up to 60%) in the mesophilic and intermediate ranges; this is the fastest and most efficient solubilization reached under thermophilic conditions using the chromium-free leather shaving as substrates. The most suitable temperature for the solubilization was the thermophilic regime (55 °C) for both chromium-free and chrome-tanned shavings. No significant differences were observed in the thermophilic anaerobic digestion of chromium-free shavings when a pre-treatment was applied, since the solubilisation was already high without pre-treatment. However, the pre-treatments significantly improved the solubilisation in the mesophilic and intermediate configurations; the former pre-treatment was better suited in terms of performance and cost-effectiveness compared to the thermophilic range. Thus, the solubilisation of chromium-free tannery solid wastes can be significantly improved by applying appropriate pre-treatments at lower temperature ranges; this is of utter importance when optimizing anaerobic processes of recalcitrant organic wastes, with the added benefit of substantial energy savings in the scaling up of the process in an optimised circular economy scenario.

Characterization of effluents from a tannery industry: a case study of Córdoba province, Argentina

Tannery effluents are considered to be severe pollutants around the world. The characterization of such effluents is a very important task in order to verify the compliance with legal requirements of the discharge and, if necessary, to optimize their treatment. In this study, we used the effluents from a local tannery (Córdoba, Argentina) that had implemented only a primary treatment. The effluents were periodically collected during one year to assess their physical, chemical, and microbiological characteristics, as well as their toxicity. The physical and chemical characteristics showed variations independently of the sampling time, although, in general, a high nutrient load was the most frequent finding. Moreover, parameters such as chemical oxygen demand, biochemical oxygen demand, total nitrogen, total phosphate, total phenols, Cr(VI) and settleable solids exceeded the limit set by the provincial legislation for the discharge of effluents into surface water bodies. The effluents were also characterized by a high count of bacteria, where pollutant-tolerant and some pathogenic bacteria were found. In sampling 9, Bacteroidetes, Firmicutes and Proteobacteria represented up to 93 % of the total number of sequences obtained, with Paludibacter, Tissierella Soehngenia, Proteocatella and Proteiniclasticum as the most abundant genera. In concordance with these results, all samples showed toxicity according to L. sativa and AMPHITOX bioassays. Altogether, data from this report indicate the need to optimize primary treatment of the effluents, as well as to include complementary treatments in order to reduce the negative environmental impacts of the release of this kind of runoffs.

Water and wastewater management in a small tanning facility

This paper presents a tannery industry's water and wastewater management problem. Information has been collected on the volume of water demand and, consequently, wastewater generation in these plants. This made it possible to relate them to the values generated by one of the smaller tanning plants located in Poland. The concentration of the pollutants contained in this wastewater, mainly chromium, was also determined from the study. Management of wastewater is a financial nuisance for small plants. The need to conclude contracts with specialized treatment plants, storage and long-distance transport of sewage, also by the respective companies, generates considerable costs, which may be a limiting factor of the willingness to invest in production. Wort reuse reduces the cost of purchasing chromium as a bath ingredient, reduces the frequency of waste disposal and significantly reduces company costs.

Tannery Effluents: Current Practices, Environmental Consequences, Human Health Risks, and Treatment Options

AbstractThe tannery industry influences the gross domestic product/economic activity of any country, but the uncontrolled release of tannery effluents causes environmental degradation and increases health risks to human. The reason for the toxicity of tannery effluents is the presence of high concentrations of organic and inorganic chemicals used in the production of leather goods. Untreated or partially treated effluents discharged into surface water results in an increase in both chemical and biological oxygen demand as well as in an increase in the levels of total suspended solids, dissolved solids, and toxic metals in environmental bodies, especially in soil, water bodies, and water sediments. Various treatment techniques, such as physicochemical, biological, and advanced oxidation methods, which include chemical precipitation, electrocoagulation, aerobic or anaerobic treatment, wetland construction, and Fenton, electro‐Fenton, and photo‐Fenton processes are also described. This review also discusses the technical appropriateness and economic feasibility of reducing the effluent pollution load and solid waste emanating from the tannery industry. Considering the enhanced health risks in the tannery waste treatment and management regime, some green and advanced technologies should be explored. A sustainable green technology that avoids the use of toxic chemicals in the tanning process is seen well for ecological health.

Studying the influence of different parameters on the electrochemical oxidation of tannery dyes using a Ti/IrO2-SnO2-Sb2O5 anode

Electrochemical oxidation directly converts organic compounds into simple inorganic molecules like carboxylic acids, H2O and CO2, and it is considered an efficient method for treating highly polluted wastewater. In this study, MMO (Ti/IrO2-SnO2-Sb2O5) was tested for the electrochemical oxidation of mono-azo (Violet RL), diazo (Green A), and tetra-azo (Brown DR) dyes used in the tannery industry. The study focused on understanding the effect of different parameters such as supporting electrolyte, dye concentration, azo dye type, pH, and current density, on the performance of the electrochemical oxidation process of individual dyes and their mixture. Under 50 mM of Na2SO4 at pH 3 and j = 50 mA cm−2 close to 100% electrochemical oxidation was achieved when 50 mg L−1 Violet RL solution was tested. Using the best conditions of 35 mM NaCl + 25 mM Na2SO4 supporting electrolyte at pH 3.0 and 50 mA cm−2 current density, a rapid and complete discoloration of a mixture of the three azo dyes at 80 mg L−1 each, with about 92% COD decay and low energy consumption, with an acceptable low ECCOD value of 0.08 kWh (g COD)−1. To assess the complete level of dye oxidation, the evolution of nontoxic short-chain carboxylic acids was evaluated.

Cellulase Enzyme Activity in Sewage, Dairy, Aluminum, Tannery Industry Effluents Flooded Soils in Warangal City, District, Telangana, India.

Cellulase Enzyme Activity in Sewage, Dairy, Aluminum, Tannery Industry Effluents Flooded Soils in Warangal City, District, Telangana, India.

Cellulase Enzyme Activity in Sewage, Dairy, Aluminum, Tannery Industry Effluents Flooded Soils in Warangal City, District, Telangana, India.

Cellulase Enzyme Activity in Sewage, Dairy, Aluminum, Tannery Industry Effluents Flooded Soils in Warangal City, District, Telangana, India.

Effect of Different Tannery Sludge Composts on the Production of Ryegrass: A Pot Experiment

Background: Tannery industry produces high amounts of nutrient rich sludges that can be used as organic fertilizers. Objective: The aim of this study was to evaluate the fertilizing potential of composted tannery sludge. Methods: A pot experiment was carried out with ryegrass (Lolium perenne L.) to test two different composts: 2.0 kg dry matter (DM) tannery fatty sludge + 1.5 kg DM sheep manure + 1.5 kg DM wheat straw (Compost 1) and 2.0 kg DM tannery sludge + 1.5 kg DM sheep manure + 1.5 kg DM wheat straw (Compost 2). Five treatments, with three replicates each, were assigned: Control (C); Compost 1 at 6 t (C1-6) and 12 t (C1-12) DM ha-1; Compost 2 at 6 t (C2-6) and 12 t (C2-12) DM ha-1. Each treatment was applied in a pot and mixed with 5 kg of sieved soil (&lt;2 mm). Results: Results showed that production of DM ranged between 1.2 t DM ha-1 for C1-6 and 2.4 t DM ha-1 for C2-12. The highest B, Na and N levels in ryegrass was observed in C2-12, with 175 mg kg-1 DM, 9 g kg-1 DM and 30 g kg-1 DM, respectively. At the end of the experiment no differences were observed between treatments for C, N, P2O5, and K2O levels. Differences were observed at Zn level ranged between 101 mg kg-1 DM for C1-6 and 71 mg kg-1 DM for C2-12. Conclusion: The C2-12 treatment was the best because induces higher DM production and nutrients in ryegrass and without dangerous concentration of heavy metals in soil. Composted waste from the tannery industry is a good source of nutrients for agriculture.