G. Srinikethan

Nitte University

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S. G. Joshi

Indian Institute of Technology Bombay

N. Lokeshwari

I. Shasikala

Bashirahmed

L. Sushma

Keshava Joshi

Visvesvaraya Technological University

B. Srikanth

Krishi Vigyan Kendra, Ghatkhed Amravati

Aparna Anand

Hebrew University of Jerusalem

Umashankar Rachitha

Visvesvaraya Technological University

Lokeshwari Navalgund

Visvesvaraya Technological University

Cooperative Institutions

Visvesvaraya Technological University

AAA College of Engineering and Technology

Sri Dharmasthala Manjunatheshwara College of Dental Sciences & Hospital

Indian Institute of Technology Bombay

Hebrew University of Jerusalem

SDM College of Medical Science and Hospital

Siddaganga Institute of Technology

Sri Siddhartha Medical College

Marymount University

University of Kalyani

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Isolation and Screening of Fungi for Aerobic Delignification and Reduction of AOX of Pulp and Paper Mill Effluent

World Academy of Science, Engineering and Technology, International Journal of Biological, Biomolecular, Agricultural, Food and Biotechnological Engineering (2013)

N. Lokeshwari G. Srinikethan S. G. Joshi I. Shasikala B. Srikanth

Isolation

Paper mill

Pulp mill

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Denitrification: Mass Transfer and Kinetic Studies

Keshava Joshi Prakash Binnal G. Srinikethan

The biological nitrification-denitrification process is used extensively for removal of ammonia nitrogen from wastewaters. In this paper the results obtained by both batch & continuous reactor studies on denitrification using pure culture of Pseudomonas stutzeri are presented. Batch fermentations (suspended culture) were carried out to denitrify the waste water containing different concentrations of nitrates. Growth kinetics was studied at room temperature and methanol is used as the sole carbon source. By using linear technique it was observed that the logistic model was suitable at these conditions for the growth of Pseudomonas stutzeri. At a given temperature, the specific denitrification rate appeared to depend on the initial nitrogen concentration, while the specific carbon consumption rate was a function of the initial carbon content. Furthermore, a C:N ratio of 3:1 was sufficient for complete denitrification. In the case of continuous recirculation studies using fluidized reactor, the performance of reactor was investigated for denitrification of waste water using immobilized pure culture of Pseudomonas stutzeri on glass beads (attached growth). Kinetics and mass transfer studies were conducted for various initial nitrate concentrations and flow rates. Developing Monod's growth kinetics to these conditions, it was observed that denitrification follows zero order reaction. The experimental results were used to simulate biofilm model. Knowing the concentrations of biofilm at the surface, the external mass transfer coefficient was calculated. The majority of models developed, however, assumed external mass transfer limitation to be negligible, and therefore its effects were ignored. To reflect the real situation in microbial aggregate systems, both external and internal mass transfer limitations, and their dependence on the particle size distribution, have to be taken into account.

Pseudomonas stutzeri

Mass transfer coefficient

Batch reactor

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Citations (7)

Extraction and characterisation of cellulose microfibrils from pongamia pinnata seed shell

P. Manjula G. Srinikethan S. Vidya

Pongamia

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Isolation and Screening of Fungi for Aerobic Delignification and Reduction of AOX of Pulp and Paper Mill Effluent

International Journal of Environmental and Ecological Engineering (2013)

N. Lokeshwari G. Srinikethan S. G. Joshi I. Shasikala B. Srikanth

Isolation

Pulp mill

Paper mill

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Biofilm characterization in removal of total chemical oxygen demand and nitrate from wastewater using draft tube spouted bed reactor

Biotechnology Letters (2021)

Keshava Joshi Lokeshwari Navalgund Kirankumar Rathod Vinayaka B. Shet G. Srinikethan

Dilution

Draft tube

Volatile suspended solids

Biochemical oxygen demand

10.1007/s10529-021-03181-3

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Isolation of fungi for delignification of Pulp and Paper mill effluent

N. Lokeshwari G. Srinikethan S. G. Joshi

Biodegradation of industrial Lignin by a fungal isolate identified as Aspergillus flavus, white rot fungi which was isolated from Pulp and Paper effluent was studied in batch flask system with industrial effluent. The flasks were operated at temperature 32°C at 200 rpm for eight days in continuous mode. The average overall pH, Temperature, DO, C.O.D, T.D.S, T.S.S, Lignin, were up to 4.56, 32 o C, 4.2mg/l, 104mg/l, 6000 mg/l, 4000mg/l, 575.5mg/l, respectively after treatment. The Aspergillus flavus sp was the most effective in the biodegradation of Lignin of pulp industry for 94% at 480nm and of chemical oxygen demand levels for 45% after 8 days of incubation. The optimal conditions found were 4 pH and 32 o C temperature for lignin degradation

Paper mill

Laboratory flask

Biochemical oxygen demand

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Citations (4)