Influence of hydraulic shock loads and TDS on the performance of large-scale CETPs treating textile effluents in India

Pophali, Girish R.; Kaul, S. N.; Mathur, S.P.

doi:10.1016/s0043-1354(02)00268-3

Cited by 38 publications

(18 citation statements)

References 2 publications

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“…This variation will dictate the composition of the active microbial community [23][24][25]. Besides varying concentration of carbon source, the composition of industrial wastewater includes high salt content and high total dissolved solids (TDS) reported to interfere with the oxygen transfer necessary for biological metabolism, thereby affecting the efficiency of activated sludge process [26]. Nutrients influence the growth and survival of bacteria involved in waste degradation and also the species diversity within the sludge [27].…”

Section: Discussionmentioning

confidence: 99%

Shifts in Microbial Community and Its Correlation with Degradative Efficiency in a Wastewater Treatment Plant

Kapley

Liu

Jadeja

et al. 2015

Appl Biochem Biotechnol

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A wastewater treatment plant controls the level of pollution reaching the environment. Yet, despite being the most common aerobic route for treatment of wastewater, the activated sludge process is not utilized to its full potential. This is mainly due to the lack of knowledge base correlating the microbial community in the activated sludge to its degradative performance. In this study, the activated biomass at the treatment site was monitored for five consecutive months. Even though operational parameters were kept constant, the microbial community was observed to change after 3 months. This shift was seen to correlate with 25 % loss of degradative efficiency. Target oxygenases were monitored at two time points, and results indicated that the dominating pathway operating in the common effluent treatment plant (CETP) is the degradation of chlorinated aromatics. This study demonstrates the change in degradative efficiency in a CETP with the change in microbial community and analyzes the parameters influencing the microbial community of activated sludge.

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Section: Discussionmentioning

confidence: 99%

Shifts in Microbial Community and Its Correlation with Degradative Efficiency in a Wastewater Treatment Plant

Kapley

Liu

Jadeja

et al. 2015

Appl Biochem Biotechnol

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“…In fact the conductivity increased from 834 to 5400 µS/cm during the first 4 weeks when MF was not operated. Microorganism can be affected by the high salinity environment, i.e., some microorganisms might be inactivated because they are unable to withstand and adapt to high salinity environment, the conductivity higher than 10,000 µS/cm was reported would inhibit the activity of microorganisms [46,50,51]. After integrating MF, the salinity dropped significantly from 5400 to 1100 µS/cm in only two weeks, suggesting that MF is efficient in mitigating the salinity build up inside the reactor.…”

Section: Toc Removal Efficiency and Mitigating Salt Accumulation By Imentioning

confidence: 99%

Performance of a Novel Fertilizer-Drawn Forward Osmosis Aerobic Membrane Bioreactor (FDFO-MBR): Mitigating Salinity Build-Up by Integrating Microfiltration

Wang

Pathak

Chekli

et al. 2017

Water

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In this paper, three different fertilizer draw solutions were tested in a novel forward osmosis-microfiltration aerobic membrane bioreactor (MF-FDFO-MBR) hybrid system and their performance were evaluated in terms of water flux and reverse salt diffusion. Results were also compared with a standard solution. Results showed that ammonium sulfate is the most suitable fertilizer for this hybrid system since it has a relatively high water flux (6.85 LMH) with a comparatively low reverse salt flux (3.02 gMH). The performance of the process was also studied by investigating different process parameters: draw solution concentration, FO draw solution flow rate and MF imposed flux. It was found that the optimal conditions for this hybrid system were: draw solution concentration of 1 M, FO draw solution flow rate of 200 mL/min and MF imposed flux of 10 LMH. The salt accumulation increased from 834 to 5400 µS/cm during the first four weeks but after integrating MF, the salinity dropped significantly from 5400 to 1100 µS/cm suggesting that MF is efficient in mitigating the salinity build up inside the reactor. This study demonstrated that the integration of the MF membrane could effectively control the salinity and enhance the stable FO flux in the OMBR.

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“…The biological treatment process cannot reduce TDS to any significant extent and the efficiency of the system can be greatly affected by high TDS [34]. The major portions of such solids are inorganic and present mostly in ionic form.…”

Section: Bod and Cod Removalmentioning

confidence: 99%

An Evaluation of Biological Approach for the Effluent Treatment of Paper Boards Industry - An Economic Perspective

Rajkumar¹

2016

J Bioremediat Biodegrad

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The environmental problems of paper board industry are not limited by the high water consumption, generate wastewaters and solid wastes. This paper presents the paper board industry effluent treatment plant components performance and physio-chemical characteristics of wastewater and sludge. In ETP operation most important factors is effluent characterization, flow rate, aeration tank dissolved oxygen (DO) level, mixed liquid suspended solids (MLSS), food to micro-organism ratio (F/M), sludge volume and chemical addition for nutrients and coagulant. The result shows that the performance of effluent treatment plant based on the permissible limits prescribed by regulatory agencies and can be recycle an entire treated effluent into the board manufacturing process. The fixed capital cost was 700 lakhs-Indian Rupees (Rs.) and annual operation and maintenance cost was estimated Rs. 180 lakhs (without RO plant). Reuse of treated effluent in pulp process and sludge in sun dry board manufacturing and composting were adopted to achieve the target of sustainable development for ecological and economical gains.

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Influence of hydraulic shock loads and TDS on the performance of large-scale CETPs treating textile effluents in India

Cited by 38 publications

References 2 publications

Shifts in Microbial Community and Its Correlation with Degradative Efficiency in a Wastewater Treatment Plant

Shifts in Microbial Community and Its Correlation with Degradative Efficiency in a Wastewater Treatment Plant

Performance of a Novel Fertilizer-Drawn Forward Osmosis Aerobic Membrane Bioreactor (FDFO-MBR): Mitigating Salinity Build-Up by Integrating Microfiltration

An Evaluation of Biological Approach for the Effluent Treatment of Paper Boards Industry - An Economic Perspective

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