International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
DESIGN OF SEQUENTIAL ANAEROBIC AEROBIC BIO FILTER BASED REACTOR FOR THE TREATMENT OF TANNERY WASTE WATER Deepakraja T G1, Prabhu P2, Dr.S.Keerthinarayana3 1P.G
Scholar, Dept. of civil engineering, Coimbatore Institute of Technology. Scholor, Dept. of civil engineering, Coimbatore Institute of Technology. 3Professor, Dept. of civil engineering, Coimbatore Institute of Technology. ---------------------------------------------------------------------***--------------------------------------------------------------------2PhD
Abstract - Ever since the industrial revolution in any
from tanneries are highly saline containing 1 to 10 % of salts (w/v) and greatly complex possessing BOD, COD, TDS, SS, NH3, TKN, acids, alkalis, vegetable tans, Cr, and others at substantially high levels. Due to high degree of complexity and pollution potentials of these wastewaters, many industries are struggling hard (especially in developing and under developed countries) to meticulously treat them before discharging these to the environment. Substantial efforts are being applied to prevent the environmental damage caused by these wastewaters, by making use of both conventional and advanced technologies such as coagulation, coagulation-cum-settling, ozonation, filtration, biological treatments like stabilization pond, solar pond, sequential batch reactor (SBR), anaerobic filters, fluidized beds, UASBP, and others around the globe (Song et al, 2004; Lidia et al, 1994; Punalet al, 2003; Woolard and Irvine, 1995; Singh and Viraraghava, 2004: Saffermanet al, 2004; Lefebvre et al, 2005; and Rajesh Banu and Kaliappan, 2007). In all these studies pertaining to biological methods, some level of inhibition of microbial activity by certain class of pollutants like tannin, Cr6+/Cr3+, sulphites, acids and/or alkalis, salts, and others have been reported.
country, it was obvious that several environmental impacts have been marred in all components until it was appropriately noticed and properly monitored. So, end-of-pipe treatment scheme is being the sole practice (or option) from several decades, in effectively treating and disposing-off liquid emissions to the receiving environment, both in advanced and developing nations. Anaerobic –aerobic systems have been remarkably employed in Industrial and municipal wastewater treatment for many years. In recent years, high rate Anaerobic-aerobic bioreactors have been increasingly employed for wastewater with high Chemical Oxygen Demand (COD). This paper demonstrates treating of high strength tannery waste water by Sequential Anaerobic-aerobic bio filter based reactor is advantageous due to minimal space requirements, low capital cost, excellent COD removal efficiencies (in excess 80%). Alkanity, volatile fatty acids and gas production is also monitored in this Sequential anaerobicaerobic bio filter based reactor. Key Words: COD, bio filter, tannery waste water, bio reactor, gas production.
1.1Objective
1. INTRODUCTION
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The agricultural development and industrial growth are the two integral components of sustainability of India, after independence. The sustenance and economic stability of independent India is due to its major industries like mining, iron and steel, cement, fertilizers, and chemicals, petroleum refinery, energy, petrochemicals, pesticides, leather tanning, textiles and others. Among these, tanneries are the oldest which are still being operational throughout the World. As far as south India is concerned, Tamilnadu is being contributed much towards the significant growth of tanneries and textile fabric industries. One of the report documents about the operation of about 6000 tanneries in the Vellore district of Tamilnadu, generating huge amount of wastewater (Das, 2001).
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2. REACTOR DESIGN The laboratory scale reactor is designed to an overall capacity of 7.71 liters with inside diameter of 100 mm and the total height of column was 1750 mm. The overall volume of the reactor was 7.7 liters and this was separated as anaerobic and aerobic zone of volume 3.31 and 3.21 liters. The total effective volume of the reactor considering aerobic and anaerobic zone was 6.51 liters. Also hoods are provided at the top and the bottom of the reactor for gas venting and probable sludge accumulation, respectively; along with three different sampling ports at appropriate location. Further, good quality PVC tubing was provided for the influent flow, gas collection and others. Internal diameter of glass column – 100 mm • Total height of the column – 1750 mm
Pre-tanning and tanning (either chrome or/and vegetable based) are the vital operations in any tannery industry, apart from post process. They not only consume huge amounts of process chemicals (about 300 kg/t of hide to be processed) and water (around 60 m3/t of hide) but also, produce equivalent amount of highly polluted wastewater (Verheijen et al, 1996). Hence, the wastewaters
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Impact Factor value: 5.181
To effectively treat the real tannery wastewater by using Sequential Anaerobic – Aerobic Bio filter. Performance Study of Sequential Anaerobic – Aerobic Bio filter. To effectively reduce the COD
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