Treatment of industrial wastewater using advanced oxidation. The characterization of the physicalchemically treated wastewater from tannery was shown in table 2. The quest for an effective alternative means for effluent treatment is a major concern of the modernday scientist. Tannery wastewater treatment by anodic electrooxidation has been reported in few papers 15. Wastewater characterization the wastewater was characterized for ph, conductivity, total dissolved. All the wastewater from the different processing phases of leather production are mixed and settled in the balancing tank also called the collecting tank. Current concerns focus on identification of heavy metal and antibiotic resistant bacteria isolated from tannery wastewater 9, 10. Salt tolerant microbes can adapt to these saline conditions and degrade the organics in saline wastewater. The nonsterilized tannery saline wastewater samples were taken separately and the efficiency of cod removal by isolated salt tolerant bacterial strains was studied by inoculating them. As reported in the literature, the characteristics of tannery. The elemental analysis of tannery wastewater conducted with the help of. In other situations an individual tannery may apply on site only pre treatment or a part pre treatment or no treatment at all, sending the effluent to a.
The tanning process consists of three basic stages. Tannery wastewater pretreatment system, wastewater characteristics and coagulants fig. Pdf tannery wastewaters are highly complex and are characterized by high contents of organic, inorganic and nitrogenous. Treatment of tannery wastewater by electrocoagulation technology. Jan 24, 20 the treatment was carried out at laboratory scale on a real primary effluent coming from a centralized plant treating the wastewater of a large tannery district in northern italy 2 microbial consortia fungal and bacterial biosorptive degradation bacillus, rhizopus, aspergillus, streptovertcillum, saccharomyces.
The biological treatment of the tannery wastewater substreams beamhouse bh, pretanning steps and tanyard wastewater ty, tanning and wetfinishing process steps and the application of an oxidative treatment by ozone, followed by a second aerobic treatment were investigated. Tanneries belong to industrial sectors with the highest levels of water consumption. The treated water was reused for tanning operation and its characteristics were compared with. After treatment of the tannery effluents, the lowest value for color 246. The current survey focused on the implementation of cleaner processes using chemical coagulants, taking into account the low cost treatment of the tannery effluents.
Pdf treatment of tannery effluents by the process of coagulation. Results of present studies show that chlorine generated on the anode removes ammonia and reduces the cod value by 77. Tannery wastewater treatment tanning means converting animal skin in to leather. One of the most successful areas of interventions implemented or facilitated by unido was designing and managing the construction of cost effective common effluent treatment plants cetp. An upflow anaerobic fixed biofilm reactor uafbr, which retains a high concentration of accumulated biomass in the form of biofilm supported by a carrier, has been developed to. Tannery wastewater was obtained from a treatment plant for tanneries wastewater located in east of guannan economic development zone. Tannery wastewaters are one of the most complex cases of treatment and disposal of industrial effluents. Evaluation and characterization of tannery wastewater. Due to the limitations of the primary and biological wastewater treatment processes, alternative processes have been pursued 7. Tannery wastewater tannery wastewater samples were collected according to the standard method 1060 b 25. Renewable energy production from tannery wastes energy central.
Carbon and energy footprint analysis of tannery wastewater. Combination technology of ceramic microfiltration and. Case study 2 treatment challenge known for its unpleasant smells, tanning also produces large quantities of wastewater from every step of the process. Kandasamy encyclopedia of life support systemseolss biographical sketches summary the leather industry is a major industry on an international scale and is of significant economic importance. Review treatment of tannery wastewater by various oxidation. There are situations in which an individual tannery applies all the belowdescribed wastewater treatment steps on site. Treatment of tannery waste water gea engineering for a. Apr 29, 2008 the treatment of tannery saline wastewater was performed in shaking flasks 100 ml batch size at varying nacl concentrations viz. Like the various characteristics of industrial wastewater, the treatment of industrial wastewater must be designed specifically for the particular type of effluent produced. Similar characteristics of tannery wastewater have been reported in the literature. Generally, industrial wastewater can be divided into two types. Vegetable tannery wastewaters contain high concentrations of organics and other chemicals that inhibit the activity of microorganisms during biological oxidations, so biorefractory organics that are not removed by biological treatment must be eliminated by a tertiary or advanced wastewater treatment. Utilization of tannery wastewater for biofuel production.
Pdf tannery wastewater treatment by simple coagulation. The results indicate that the wastewaters from the tanneries do not satisfy the legal ranges of selected parameters discharge to inland water and to sewer. Tannery wastewater treatment by electrooxidation coupled. Apr 11, 2012 hulshof outsourced their wastewater treatment to waterstromen bv in 2001. Biological treatment of leathertanning industrial wastewater. Preparation of the hides for tanning, tanning proper.
Based on this work in the field of tannery wastewater treatment, an effort to innovate suitable treatment trains and technologies has the. Fungi have been attracting a growing interest for the biological treatment of industrial wastewater. Water and wastewater treatment technologies wastewater treatment technology for tanning industry r. It can be seen that the cod and alts concentrations are considerably higher than those measured for municipal waste water. In this paper, the applicability of electrochemical oxidation as a tertiary treatment of a. The chemical oxygen demand, cod in tannery wastewater, was reduced to variable extents at the different parameters of the treatment, but it is still higher the allowed limits, except when the current density was 80 ma for 3 hours period where 955 ppm value was obtained.
Treatment and reuse of tannery waste water by embedded. Moreover, the energy intensity of tannery wastewater treatment processes are evaluated at 3. Treatment of tannery wastewater by chemical coagulation. This fluid would then be reused in the same industrial process, assuring the maintenance the physicalchemical properties of the leather produced. Both aerobic and anaerobic processes are employed for the treatment of tannery wastewater. Despite all preventive measures, a sizeable portion of pollutants can only be removed by the endofpipe methods, i. Currently, chemical precipitation methods are practiced for the removal of chromium from the effluent, but that leads to the formation of chromebearing solid wastes.
Kinetic data for the electrochemical process are derived from an extensive experimental study, while those relating to biological processes are taken from the authors previously published studies or from the literature. Treatment of tannery wastewater is carried out by physical or chemical or biological or combination of these methods 78910. Water and wastewater treatment technologies xuanthanh bui. The various oxidation techniques uv, tio 2 uv, o 3, h 2 o 2 uv and o 3 uv to degrade tannery wastewater were reported by schrank et al. It is possible for a plant to recycle its waste for minimal environmental impact and perhaps even to create a product for resale or reuse. A new effluent treatment plant was designed and built by paques in close cooperation with waterstromen bv. The wastewater was taken from an e uent stream of a leather tanning facility of the white nile tannery company, khartoum, sudan. Treatment of highly contaminated composite tannery wastewater. Handbook of water and wastewater treatment plant operations.
However, wastewater production varies in wide range 10100 m3 per ton hide depending on the raw material, the finishing product and the. Tannery wastewater the wastewater used in this study was supplied by a commercial tannery in the region of ain elsira, misr elkadima, and cairo, egypt. Treatment of tannery wastewater by electrocoagulation ec process was investigated in this study. The treatment was carried out at laboratory scale on a real primary effluent coming from a centralized plant treating the wastewater of a large tannery district in northern italy 2 microbial consortia fungal and bacterial biosorptive degradation. Metagenomic profiling of antibiotic resistance genes and. Wastes generated from each unit operation of a tannery an average of 3035 m3 of wastewater is produced per ton of raw hide.
Bioaccumulation of chromium from tannery wastewater. Table 2 presents the indian and the international scenarios of characteristics of. Treatment of the wastewater was carried out by an electrochemical batch reactor equipped with. Until now it was considered that the complexity of the waste water stream originating from tanneries in combination with the presence of chroming would result in the. Journal of environmental science and technology keywords. Tannery wastewater was obtained from a treatment plant for tanneries wastewater located in east of guannan economic development zone, lianyungang city, jiangsu province, china. The other membrane separation and ion exchange methods available are unfeasible due to their cost. In this study, saccharomycescerevisiae and torulasporadelbrueckii were isolated from spoiled watermelon and inoculated into different concentrations of effluent. Pdf the present study aimed to investigate decontamination of tannery. Wastewater samples were collected from leather tanning factory.
The present study aimed to investigate decontamination of tannery wastewater in terms of removal capacity and efficiency using indigenous andor exogenous bacteria. Perspectives on biological treatment of tannery effluent hilaris. Toxics free fulltext tannery effluent treatment by yeast. Tannery wastewater treatment using an upflow anaerobic fixed. The application of an anaerobic treatment for the break down of cod from tannery waste water is an innovative and attractive method to recover energy from tannery wastewater. Oct 01, 20 in addition, presence of various heavy metals and biocides in tannery wastewater contributes to coselection of antibiotics and heavy metals in wastewater treatment plants wwtps.
Electrochemical oxidation as a final treatment of synthetic. The treatment of tannery saline wastewater was performed in shaking flasks 100 ml batch size at varying nacl concentrations viz. Sep 04, 2004 vegetable tannery wastewaters contain high concentrations of organics and other chemicals that inhibit the activity of microorganisms during biological oxidations, so biorefractory organics that are not removed by biological treatment must be eliminated by a tertiary or advanced wastewater treatment. Visiting wastewater treatment plant at saver in dhaka.
Hulshof outsourced their wastewater treatment to waterstromen bv in 2001. Tannery wastewater treatment using activated sludge. Conventional biological treatment methods are often inadequate to completely remove pollutants in tannery wastewater. From the result, it can be seen that conventional treatment.
Pdf biological treatment of leathertanning industrial. Index terms alkalinity, acidity, cod, bod, tannery wastewater, sulfides, chlorides i. Tanneries wastewater effluent is treated in many different ways. Tisno 2pdo 2ruo 2 spr anode is reported the most effective one 1. Simplified flowchart of the biological secondary tannery effluent treatment. The presence of chromium in the effluent is a major concern for the tanning industry. Treatment of complex tannery wastewater with paques. This book provides an introduction to the fundamental concepts and equations that underlie the engineering processes in wastewater treatment. Biological treatment of leathertanning industrial wastewater using free living. Feasibility of reusing tannery waste water by combinations of existing conventional activated sludge process, with ultra filtration, nano filtration and reverse osmosis treatment technologies were studied. Treatment and reuse of tannery waste water by embedded system. In this paper, the applicability of electrochemical oxidation as a tertiary. Advanced oxidation processes for the treatment of tannery.
Handbook of water and wastewater treatment plant operations, the intent of the author is twofold. Biological treatment of tannery wastewater by using salt. High salinity 110% wv of tannery wastewater makes it difficult to be treated by conventional biological treatment. Introduction to treatment of tannery effluents 9 to avoid possible confusion arising due to differences in water consumption, it is practical to indicate the amount of pollutants generated per tonne of rawhide input. Results of the investigation on treatment of tannery wastewater by various oxidation and combined processes have been reported in this study.
Coagulation is a process that sanitizes leather effluents. In other situations an individual tannery may apply on site only pretreatment or a part pretreatment or no treatment at all, sending the effluent to a. By applying industrially proven lowwaste advanced methods such as the use of saltfree preserved raw. Cleaner tannery wastewater using chemical coagulants. Wastewater treatment technology for tanning industry. Raw materials are organic, as those coming from food industries, but with a main difference regarding chemical process in with both organic and inorganic reagents are used. It aims to reduce pollutants such as chemical oxygen demand cod, chloride, sulfate, chromium. The paper is aimed at defining the best option of a combination of electrochemical and biological processes for tannery wastewater treatment. Its focus is on both novel treatment strategies and the modifications and adaptions of conventional processes to optimize the treatment of a complex variety of pollutants, including organic matter, chemicals and micropollutants in different water resources, as well as the integration of water treatment.
This book discusses major technological advances in the treatment and reuse of wastewater. Treatment of tannery wastewater by electrocoagulation. Topics include preliminary treatment, sedimentation, biological treatment, nutrient removal, disinfection, and sludge treatment. Four salt tolerant bacterial strains isolated from marine and tannery saline wastewater samples were identified as pseudomonas aeruginosa, bacillus flexus. Introduction to treatment of tannery effluents 9 to avoid possible confusion arising due to differences in water consumption, it is practical to indicate the amount. The liming of the salt free and rehydrated material is carried out in two stages.
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