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Tannery pollution and the resulting health impacts are a worldwide problem. Due to the cheap labour availability and tax pollution regulation leather tanning has become a popular export earning industry in countries like India, Pakistan and Bangladesh. Given its huge potential for export earnings and local economic livelihood especially for poor households, its adverse health impacts seem to have been ignored. Also thus far there has been no systematic economic valuation study in India. This also attempts to estimate the health cost of this industry to people including those very households that have made leather tanning their livelihood. Therefore the present research study aims to examine economic valuation of human health impact of the pollution from the tannery industry in Vellore district, using the Willingness to Pay method. Vellore district in Tamil Nadu state of India is purposively selected because of its larger number of tanneries.

Penelitian ini mendeskripsikan potensi biofuel mikroalga menggunakan Oxidation Ditch Algae Reactor. Produksi biomassa, klorofil a dan lipid Chlorella vulgaris meningkat seiring waktu dan diamati menjadi 2440 mg / L, 3,78 mg / L, dan 16,91% setelah 7 hari, dengan limbah tahu. Produksi biomassa, klorofil a dan lipid adalah 2050 mg / l, 2,4 mg / l, 14,34%, dengan limbah penyamakan kulit. Produksi biomassa, klorofil a dan lipid adalah 2430 mg / l, 3,47 mg / l, 16,79%. Produksi biomassa, klorofil a dan lipid Spirulina Plantesis meningkat seiring dengan bertambahnya waktu dan diamati bahwa 3320 mg / L, 4,81 mg / L, dan 23,86% setelah 7 hari, dengan limbah tahu produksi biomassa, klorofil a dan lipid meningkat. bersama waktu. dan mengamati 3210 mg / L, 2,67 mg / L, dan 19,34% setelah 7 hari, dengan limbah dari penyamakan produksi biomassa, klorofil a dan lipid dari Spirulina Plantesis meningkat dengan bertambahnya waktu dan diamati menjadi 2980 mg / L, 4 mg / L, dan 19,53% setelah 7 hari. Studi ini menunjukkan bahwa produksi biofuel dan pengolahan air limbah oleh Chlorella Vulgaris & Spirulina Plantesis menggunakan limbah tahu & limbah penyamakan kulit

Kandungan hara yang tinggi pada sludge industri penyamakan kulit menjadikan dasar untuk mengeksploitasi sludge tersebut sebagai campuran media tanam pada pucuk merah. Penelitian bertujuan untuk mengetahui kemampuan tanaman pucuk merah terhadap pemberian sludge IPAL industri penyamakan kulit dan mengetahui konsentrasi yang dapat digunakan sebagai campuran media tanam pada tanaman pucuk merah. Variasi komposisi sludge:tanah, yaitu 5%:95%, 10%:90%, 15%:85%, 20%:80%, 0%:100%. Penelitian ini dilakukan dalam waktu 3 minggu dengan frekuensi pengamatan 3 hari sekali terhadap tinggi dan diameter batang. Hasil penelitian menunjukkan bahwa Syzygium oleana dapat bertahan hidup dari awal sampai akhir penelitian dengan pemberian konsentrasi sludge yang sesuai karena kandungan unsur hara yang tinggi sehingga mempengaruhi kesuburan tanaman baik dalam pertumbuhan tinggi dan perkembangan diameter tanaman yang meningkat dibandingkan dengan tanaman kontrol. Konsentrasi sludge yang dapat digunakan sebagai campuran media tanam pada tanaman pucuk merah berada pada konsentrasi di bawah 50%. Kata kunci: Industri Penyamakan Kulit, Sludge IPAL, Syzygium oleana

Skin diseases are a major occupational health issue in tannery workers because of work related exposure to various toxic chemicals used in tanning process. In the present study, prevalence of various skin diseases and predisposing factors in tannery workers were investigated.A cross sectional study including 114 tannery workers (male-89; female-25) employed at different tanneries of Southern India was carried out. Face to face interview with pre-designed questionnaire and health examination was conducted. Skin samples obtained from the participants were subjected to microscopic examination and microbial culture for diagnosis of skin diseases. The prevalence of occupational skin disorders were 39% among the study participants. Contact dermatitis (16%), skin infections (16%), eczematous lesions (7%) and nail discoloration (1.75%) wereidentified. Skin infections of fungal origin were identified among 11.4% of subjects. The skin infections of fungi; tenia corporis, tenia cruris, tenia unguium, tenia versicolor, tenia pedis and Pityriosis versicolor were identified. Bacterial skin infections identified were associated with contact dermatitis. Lack of PPE usage was reported among 30% of workers. Hazardous working environment, chemical exposure, humidity and lack of PPEusage were significantly associated with increased skin disease incidence(p

Leather is a product obtained from the conversion process of raw skin/hide into leather. The process generate a number of wastes with a high pollutant content, especially waste water. The waste contributes to the formation of carbon emission. Awareness on environmental sustainability also requires the industry to improve its production system to make it more eco-friendly. Improvements will increase production and the industry reputation. Before making improvements to the production system, it is necessary to carry out an analysis related to the carbon emissions produced in producing a product. The objectives of this study were to calculate carbon emission (carbon footprint) that generates in the leather tannery process and to give alternative strategy for the environmental improvement. The research used primary data and secondary data. This research was carried out with the processes identification, carbon emission sources identification, an analysis of the carbon emission potential amount, and a study of strategies to minimize carbon formation in the tannery. The results of the analysis showed that electricity and wastewater were sources of carbon in the production process of leather. The total of carbon emission formed in the leather tanning process was 1,692.17 kg CO2 eq per batch, where wastewater contributed more than electricity. Further analysis showed that 1 m2 of leather produced 8.08 kg CO2 eq of carbon. The strategies that can be taken to reduce carbon emissions are engineering processes, material substitution, and using eco-friendly materials. Keywords: carbon footprint, leather, tannery

Green productivity (GP) is a strategy by which production processes are improved by efficiently using resources and materials and adverse impacts on the environment are reduced. This study aims to measure GP of an Indonesian leather-tanning industry and develop alternatives to current processes that would improve its environmental and economic impacts. Two small to medium tanneries (Tanneries A and B) in two provinces were used as a case study. Data were collected through direct observation, measurements, in-depth interviews, and activity documentation. Material flow was analyzed using a green material flow map to determine the six sources of green wastes and the environmental indicators. The GP Index (GPI) was used to measure GP. The best method by which to improve GP was determined using GPI to a ratio of GP along with expert analysis using an analytical hierarchy process. GPI at Tannery A, located in West Java, was 0.14 with economic and environmental indicators of 1.44 and 10.41, respectively. GPI at Tannery B, located in Central Java, was 0.16 with economic and environmental indicators of 1.60 and 9.99, respectively. GP in both tanneries was low because of their suboptimal use of water. High water consumption can lead to a high discharge of liquid waste. Six alternatives for Tannery A and four for Tannery B were created. According to GPI, GP ratio, and expert opinion, the best strategy by which to improve GP was water recycling in the soaking and liming processes. This strategy increased GPI at Tannery A to 0.18 and at Tannery B to 0.20.

Unhairing is one of the major steps of the leather tanning process which removes the hairs, epidermis and to some degree inter-fibrillary proteins. This process needs high amounts of chemicals that cause environmental difficulties. On the other hand, these chemicals are available in the wastewater of the Merox unit of Kermanshah Refinery. For reducing chemical consumption and decreasing environment pollution, we used the aforementioned wastewater for bovine unhairing. A unhairing liquor was prepared in order to unhair skins and different parameters such as the concentration of CaCO3 and Na2S, process time, and temperature were considered to evaluate their impact on the unhairing process and to obtain optimum condition. Response surface methodology based on Box-Behnken design was applied to model the unhairing efficiency in terms of four independent variables. A second-order polynomial equation was suggested to predict the response with high certainty. ANOVA revealed the validity and importance of that model by P-value of < 0.0001, large F-values, and, R2 of 98.8. The maximum unhairing efficiency of about 98.5 % was obtained under the optimum condition of 1.7 wt% Na2S, 5.8 wt% CaCO3, 114 min process time and 29.5 ºC.

The Indonesian leather industry has low competitiveness among ASEAN Countries. The government, entrepreneurs, and researchers are trying to find solutions to improve competitiveness. However, there are differences in understanding the dimensions of competitiveness. This research aims to con¬struct and validate the competitiveness model in the manufacturing industry. In general, the concept of competitiveness is more oriented to the final result than to the process dimension. To improve competitiveness, this study using a manufacturing strategy approach based on process capability. The design of the competitiveness model contains the relationship between exogenous and endogenous variables with formative patterns. Exogenous variables are dimensions that makeup competitiveness, consisting of resources, operational processes, and performance. The data were obtained from 42 leather tanning factories in Indonesia, which was analyzed using Partial Least Square. This study reveals that industrial competitiveness is influenced by the dimensions of resources, operational pro¬cesses, and performance, where the dimensions of operational processes have a greater influence. This research confirms that the government and entrepreneurs must prioritize process capabilities to improve their competitiveness.

Aluminium dross, an industrial by-product generated in large quantities, is fairly rich in aluminium content. Even though there are means of recycling (pyrometallurgical and hydrometallurgical routes), still a large amount of aluminium dross is landfilled. This research article emphasizes on recycling of aluminium dross by the production of potash alum. Powdered aluminium dross is allowed to react with potassium hydroxide, followed in sequence by filtration, slow addition of sulphuric acid coupled with constant stirring of the solution, heating the solution and cooling it in the cold water bath to produce potash alum. The crystals of potash alum are formed in the solution after a few hours. Analysis of the product potash alum, parent liquor and the residual liquor shows that nearly 89.2% of aluminium present in the parent liquor is successfully transferred into the product potash alum crystals. Potash alum finds its applications in wastewater treatment plants, pharmaceutical cosmetic industries and leather tanning units.

En el presente proyecto se diseñó un sistema de tratamiento para los efluentes del proceso de curtido de pieles; este sistema se evaluó a partir de la realización de ensayos de laboratorio para asegurar su viabilidad, y se validó el tratamiento mediante el análisis de efluentes provenientes de la planta ya instalada. El sistema tiene tres unidades: la primera es un pretratamiento que permite la oxidación de sulfuros para los baños de pelambre y calado, así como la precipitación de cromo para los baños de piquelado y curtido; la segunda es un tratamiento físico-químico para los efluentes generales del proceso que permite obtener efluentes tratados y sólidos decantados; la tercera es un tratamiento de lodos que permite obtener lodos acondicionados y de bajo volumen a ser recolectados para su disposición final. El análisis de los efluentes tratados demostró una reducción considerable en la concentración de químicos contaminantes que permite reutilizar el agua y acerca a la empresa al cumplimiento de los niveles máximos permisibles.

Dyes are colored compounds extensively used for coloring products in industries such as textiles, leather tanning, cosmetics, pigmentation, and others. Synthetic dyes have almost substituted natural dyes due to their higher resistance toward washing, heat, light, pH, exposure to biological agents, etc. Various dyes used in the industrial process include azo dyes, sulfur dyes, pigment dyes, etc. Synthetic dyes possess various advantages compared to natural dyes; however, they cause serious adverse effects to the environment. With the rapid expansion of industries, especially textiles, the demand for dyes has increased and this creates a major cause of water pollution. Several studies reported that dyes are carcinogenic and mutagenic for humans. Due to their xenobiotic properties and chemical structures, they show resistance to degradation. Due to these problems, the removal of dyes using different methods is required. Biological method of using plant offers a low-cost, eco-friendly, and efficient substitute for dye removal. Phytoremediation uses plant roots to protect the environment by the removal of pollutants in the form of inorganic and organic wastes. Phytoremediation is capable of treating pollutants of dye waste, which are derived from various sources. Adaptation in genetic levels is the basic attitude behind plants that are able to manage the contaminants from a polluted site. Therefore, in this chapter, various problems associated with dyes and potential removal strategies using phytoremediation have been discussed.

Chrome tanned leathers are definitely unique in comparison with leather made from any other known tanning agents, especially in terms of thermal stability, cost and its reactive mechanism with collagen fibers. In our current studies, self basifying chrome tanning materials masked with different percentages of organic acid were prepared and applied after the de-liming stage of leather processing. This eliminated the need for pickling and basification steps. Tanned leathers resisted shrinkage up to 103 and 105±2°C while conventional chrome tanned leathers resisted up to 108±2°C. Also, interaction of anionic chrome species in tanning was studied. It was observed that the percentage of anionic species in the experimental chrome tanning material was higher than conventional chrome tanning material and the shrinkage temperature achieved by application of experimental tanning material proves that anionic species do involve in tanning. Tanned leathers were crusted and analysed for strength and organoleptic properties.

Leather tanning is a stabilisation process of skin fibers. This is achieved by the interaction of collagen amino acids with tanning agents to stabilise skin from putrefaction. Tanning of collagen with oil is a special class of tanning known as chamois tanning. Chemically, the oil tanning involves oxidation of unsaturation present in the oil, which is generally achieved by exposing oil treated skins to air. In this study, Benzoyl peroxide has been used as an accelerating agent for oxidation of unsaturated bonds present in the linseed oil for oil tanning process. Results shows remarkable reduction in tanning duration from fifteen days to two days. The chamois leathers prepared using oxidation accelerant (Benzoyl peroxide) have been evaluated for physical properties such as water absorption (611%), tensile strength (18 N/mm2) and percentage of elongation (66 %) which are found to be better than control leathers.

The application of GSCM (Green Supply Chain Management) practice in the leather tanning industry in Yogyakarta is still relatively difficult because the industry prefers manufacturing systems that can accelerate profit uplift without considering environmental quality. Therefore, this research attempts to measure GSCM performance applied in the leather tanning industry, particularly at PT. Asa Yogyakarta. The method used in this research is Green SCOR (Green Supply Chain Operations Reference) and AHP (Analytical Hierarchy Process). Data collection in this research was by identifying the company's GSCM activities, then compiling performance indicators that refer to the green SCOR method. Weighting performance indicators are conducted to determine the importance of each performance indicator by using the AHP method. The results of this research indicate that the application of GSCM is quite good with the average value of the total GSCM performance >90, despite several improvements that are necessary to enhance the performance.

The utilization of biotechnology in leather sector has more extensive in modern years; more particular to proteolytic enzymes and employed in several steps of the leather making such as soaking, dehairing, bating, solid waste management etc. The current study evaluates the performance of alkaline protease from Bacillus crolab MTCC 5468 in single soaking of goat skins matrix by comparing with the conventional multiple soaking processes. According to the obtained results, the optimum concentration for maximum rehydration of goat skins was accomplished at 1.0% (v/w) of alkaline protease at duration of 3 h over traditional rehydration method (4–6 h). The moisture level, total protein, chloride content and total organic carbon of enzymatic rehydration was superior to that of conventional rehydration and it was also used to measure the effectiveness of rehydration process. Scanning electron microscopic images of enzymatically processed leather exhibits enhanced opening of fiber bundles and smooth grain surface than conventional method. Furthermore, the alkaline protease treated leather exhibited improved moisture uptake, removal of chlorides and suppleness because of hydrolysis of non-collagenous proteins as indicated by well opened up fiber bundles in histological analysis. The application of alkaline protease in rehydration operation of leather production confirmed scope for diminishing water quantity around 66.6%, soaking duration at 50%, minimizing use of harmful dehairing chemicals at 50–60%, thereby, eliminating the bating operation during pre-tanning. These outcomes suggest that alkaline protease have potential application in rehydration of skins for immense environmental concerns of leather tanning sectors.

The present work reports the quantitative analysis of chromium along with other constituents in the soil of the Jajmau industrial area, Kanpur, India using laser-induced breakdown spectroscopy (LIBS) and total reflection X-ray fluorescence (TXRF). High concentrations of chromium have also been demonstrated in wheat and mustard plants in this study.

Leather tanning technology impacts negatively on the environment as a result of chemicals in the tannery effluents that increases the concentrations of chemical oxygen demand, Biological oxygen demand, total dissolved solids, total Kjeldahl Nitrogen and formation of Cr(VI) among others in the environment. This has led to the profiling of the industry by legislative bodies as a major source of pollution and hence urgent cleaner and eco-friendly innovative technologies are required that will mitigate the environmental pollution. Many studies have recommended green chemistry tanning protocols and systems involving plants since are non-carcinogenic, non-toxic, biodegradable, agro-renewable, sustainable and economical. Numerous studies have evaluated the potential of phytochemistry in leather tanning processes. However, these studies only focused on individual processes or individual plant phytochemicals. Hence this review compiles the selected plants, their phytochemical screening results, their applications in tanning process and their potential for leather tanning. The review has shown enormous capacity of plants and their phytochemicals that can replace synthetic inorganic materials in leather processing and guarantee quality. Plants have a greater applicability in this industry since they have multiple beneficial actions during processing and the final processed leather. Some plants can be used at all tanning processes due to wide variety of important phytochemicals and the final leather is more superior quality to the conventionally processed leather. Other studies have alluded to the possibility of some plant products that have the potential in the industry but yet to be utilized. Further studies have been recommended.

Leather tanning wastewater which contains chromium (Cr) pollutes river located close to the industrial area. In Garut district, leather tanning industry wastewater is dumped into Cigulampeng river which water is used to irrigate nearby paddy fields. The paddy fields affected by leather tanning wastewater are reaching an area of 37.1 ha in Kota Wetan village and 76 ha in Sukamantri village. This research is aimed to determine the effect of tanning wastewater on paddy fields in Sukamantri village, Garut district. A descriptive quantitative method using questionnaires and interviews to local farmers in polluted and unpolluted paddy fields was employed. In addition, an observation on environmental factors including chemical and physical conditions of river water and paddy fields soil was also conducted. Polluted water is characterized by its frequently color-changing, unpleasant odor, and toxic substances which mainly is chromium. Paddy cultivars planted in the polluted area are Rojolele (65.71%), Sarinah (42.8%), Widas (37.715%), Ciherang (20%), and Mega (11.43%). These paddy cultivars are chosen by farmers mostly based on their ability to withstand pollution and pest (mainly rats). Leather tanning wastewater decrease paddy production with percentage of reduction can be categorized into low (25.71%), medium (34.28%), high (34.28%), and very high (45.71%). According to farmers, the contaminated water also causes itching and burning sensation to their skin, dizziness, and nausea.

The increasing environmentally friendly approach of using renewable materials has led to vegetable tannins having an important role as tanning agents in the leather industry. Tannins are complex ph...

Resumen En este estudio se evaluó la remoción de sulfuros en aguas residuales del proceso de pelambre o depilado de pieles, utilizando ozono como agente oxidante. Se determinó el efecto del pH inicial sobre el proceso de remoción, para este fin se usó un diseño experimental completamente al azar, en el cual el pH del agua se varió entre 10, 11, 12 y 13, el ozono fue dosificado a una tasa de 0,5 g h-1 por un periodo de 3 horas tomando muestras cada 30 minutos. Los ensayos fueron realizados para el agua residual real, suministrada por una curtiembre y agua residual sintética, a fin de comparar la remoción alcanzada en cada caso. El análisis de los resultados obtenidos permitió señalar que la mayor remoción se logró a pH 11 en el agua residual real, alcanzando un valor de 77,78%, aproximadamente 39% superior al alcanzado al mismo pH para el agua residual sintética. También se evaluó la cinética del proceso, obteniendo que los resultados se ajustan a una cinética de pseudo primer orden para la cual el coeficiente cinético fue de -0,0001 s-1, por último, se observó que después de cada ensayo se presentó disminución pH, lo cual confirma lo que químicamente debería suceder, formación de H2SO4 por la oxidación de sulfuros a sulfatos. Finalmente, se concluye que la remoción de sulfuros empleando ozono es una técnica aplicable para pH alcalino, permitiendo reducir tiempos de oxidación y convirtiéndose en una alternativa viable para aplicar en la industria del curtido de pieles. Abstract In this study, the removal of sulfides in wastewater from the process of peeling or depilating skins was evaluated, using ozone as an oxidizing agent. The effect of the initial pH on the removal process was determined, for this purpose a completely randomized experimental design was used, in which the pH of the water was varied between 10, 11, 12 and 13, the ozone was dosed at a rate 0.5 g h-1 for a period of 3 hours taking samples every 30 minutes. The tests were performed for the real wastewater, supplied by a tannery and synthetic wastewater, in order to compare the removal achieved in each case. The analysis of the results obtained showed that the highest removal was achieved at pH 11 in the actual wastewater, reaching a value of 77.78%, approximately 39% higher than that reached at the same pH for the synthetic wastewater. The kinetics of the process were also evaluated, obtaining that the results are adjusted to a kinetic of pseudo first order for which the kinetic coefficient was -0,0001 s-1, finally, it was observed that after each test there was a decrease pH, which confirms what chemically should happen, formation of H2SO4 by the oxidation of sulphides to sulfates. Finally, it is concluded that the removal of sulfides using ozone is a technique applicable for alkaline pH, allowing to reduce oxidation times and becoming a viable alternative to apply in the leather tanning industry. Resumo Neste estudo avaliou-se a remoção de sulfetos em águas residuais do processo de pelagem ou depilado de peles, utilizando ozônio como agente oxidante. Determinou-se o efeito do pH inicial sobre o processo de remoção, para este fim usou-se um desenho experimental completamente ao azar, no qual o pH da água variou-se entre 10, 11, 12 e 13, o ozônio foi dosificado a uma taxa de 0,5 g h-1 por um período de 3 horas tomando amostras a cada 30 minutos. Os ensaios foram realizados para a água residual real, subministrada por um curtume e água residual sintética, a fim de comparar a remoção alcançada em cada caso. A análise dos resultados obtidos permitiu assinalar que a maior remoção se logrou a pH 11 na água residual real, alcançando um valor de 77,78%, aproximadamente 39% superior ao alcançado ao mesmo pH para a água residual sintética. Também avaliou-se a cinética do processo, obtendo com que os resultados se ajustem a uma cinética de pseudo primeira ordem para a qual o coeficiente cinético foi de -0,0001 s-1, por último, observou-se que depois de cada ensaio apresentou-se diminuição do pH, o qual confirma o que quimicamente deveria suceder, formação de H2SO4 pela oxidação de sulfetos a sulfatos. Finalmente, conclui-se que a remoção de sulfetos empregando ozônio é uma técnica aplicável para o pH alcalino, permitindo reduzir tempos de oxidação e convertendo-se em uma alternativa viável para aplicar-se na indústria do curtimento de peles.

7 figures, 4 tables.-- Supplementary information available.-- © 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/, Developing chrome-free and sustainable tanning agents is extremely important to the sustainability of the leather industry. Herein, we have synthesized an Al-Zr-oligosaccharides tanning agent via a simultaneous degradation and oxidation of cellulose in waste paper. The influence of the temperature and the concentrations of AlCl3 and H2O2 during the synthesis were thoroughly investigated on the properties of the tanning agent and the leather produced. The synthesis temperature and the concentration of AlCl3 were the factors primarily affecting the effective depolymerization of cellulose. They controlled the conversion of waste paper into oligosaccharides with an appropriate molecular weight to efficiently penetrate the leather matrix. In parallel, the H2O2 concentration substantially influenced the tanning performance of the Al-Zr-oligosaccharides, diminishing the chromaticity of the tanning liquid via oxidation and promoting the conversion of C2/C3/C6-OH moieties into -CHO/-COOH. These functional groups increased the surface charge of the oligosaccharides allowing more effective coordination with Al/Zr, which facilitated the penetration of Al/Zr species into the leather matrix. Once inside the leather matrix, Al and Zr were released and reacted with the collagen fibers in leather, which resulted in effective leather tanning. The process optimization revealed that up to 57% of waste paper could be converted into a low-chromaticity (4350 AU) liquid hydrolysate with the synthesis conducted at 177 °C in a system comprising 47 mM AlCl3 and 5 vol% H2O2. The application of this liquid for tanning provided leather with a shrinkage temperature (86.5 °C) sufficiently high for commercial applications. These excellent results, combined with the intrinsic green nature of our approach, exemplify a step forward to simultaneously reduce pollution and hazards in leather industries giving a second life to waste paper., This work is financially supported by the National Natural Science Foundation of China (22078211). Javier Remón acknowledges the Spanish Ministry of Science, Innovation and Universities for the Juan de la Cierva (JdC) fellowship (Grant Number: IJC2018-037110-I) awarded.

Olive mill wastes represent an important environmental problem. Their high phenol, lipid, and organic acid concentrations turn them into phytotoxic materials. Specifically, wet olive pomace (WOP) is the waste generated in the two-phase continuous extraction process. WOP is a paste with around 60% water. The total volume of WOP generated is around 0.25 L/kg of olives processed. Its current waste management practices result in environmental problems as soil contamination, underground seepage, water-bodies pollution, and foul odor emissions. Some valorization alternatives include composting, biological treatments, direct combustion for energy production, or direct land application. The leather industry is making great efforts to apply cleaner processes while substituting chemical products for natural products. In this way, different alternatives are being studied, such as the use of zeolites, triazine derivatives, grape seed extract, olive leaf extract, etc. In this work, the use of wet olive pomace is presented as a possible alternative to conventional vegetable tannins (mimosa, quebracho, chestnut, etc.). Although different projects and studies have been developed for the valorization of olive mill wastes, there is completely a new approach to the WOP application for tanning purposes. This study shows that WOP has a significant number of polyphenolic substances, so it has a great potential to be used as a tanning agent. Specifically, this study has been able to determine that, of the polyphenols present in WOP, 39.6% correspond to tannins that are capable of tanning the skin. Additionally, it contains 14.3% non-tannins, that is, molecules that by themselves do not have the capacity to tan the leather but promote the tanning mechanism and improve the properties of the tanned leather. The financial support provided by ACCIÓ within the frame of the project “New recycling strategies for olive oil extraction process waste (wet olive pomace) to be applied in the leather industry” (OLIPO) MNET19/ENER-3655. MANUNET-Transnational Call 2019 is appreciated. The study was supported also by a grant of the CCCDI-UEFISCDI, projects numbers 144 and 145 /2020, ERANET-MANUNET-OLIPO-1 and 2, within PNCDI III.