Comparison of the trickling filter models for the treatment of synthetic dairy wastewater

Raj, S. Amal; Murthy, D. V. S.

doi:10.1007/s004490050639

Cited by 14 publications

(8 citation statements)

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“…Stover–Kincannon is one of the most widely used mathematical models to determine the kinetic constants for immobilized systems. The model has been applied to continuously operated mesophilic and thermophilic upflow anaerobic filters for the treatment of paper‐pulp liquors,27 simulated starch wastewater,28 anaerobic filters for soybean wastewater treatment,29 anaerobic hybrid reactor,30 determination of decolorization kinetic constants in a packed bed reactor,31 aerobic treatment of synthetic dairy wastewater in trickling filters,32 and municipal wastewater treatment in submerged biofilters 33. The Stover–Kincannon model considers the substrate removal rate as a function of substrate loading rate at steady state as in Equation (1).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the Catalytic Performance of Gas‐Evolving Electrodes using Local Electrochemical Noise Measurements

et al. 2012

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Characterization of gas evolution reactions at the electrode/electrolyte boundary is often difficult due to the dynamic behavior of interfacial processes. Electrochemical noise measurements determined by scanning electrochemical microscopy were used to characterize Cl(2) evolution at gas-evolving electrodes (GEEs). Analysis of the electrochemical noise is a powerful method to evaluate the efficiency of the catalyst layer at a GEE. The high sensitivity of the developed measurement system enabled accurate monitoring of the current fluctuations caused by gas-bubble detachment from the electrode surface. Fourier transform analysis of the obtained current responses allows extraction of the characteristic frequency, which is the main parameter of the macrokinetics of GEEs. The characteristic frequency was used as part of a methodology to evaluate the catalyst performance and, in particular, to estimate the fraction of the catalyst layer that is active during the gas evolution reaction.

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Section: Resultsmentioning

confidence: 99%

Evaluation of the Catalytic Performance of Gas‐Evolving Electrodes using Local Electrochemical Noise Measurements

et al. 2012

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“…The obtained results are similar to those with anaerobic trickling filters. At OLR of 4.45 g COD/L•d and HRT of 2.64 d, removal efficiency of COD was 81% [34]. The OLR during anaerobic degradation of acid whey ranged from 1.6 to 12.8 g COD/L•d.…”

Section: Organic Compounds and Nutrient Removalmentioning

confidence: 97%

Evaluation of Anaerobic Digestion of Dairy Wastewater in an Innovative Multi-Section Horizontal Flow Reactor

et al. 2020

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The aim of this study was the performance evaluation of anaerobic digestion of dairy wastewater in a multi-section horizontal flow reactor (HFAR) equipped with microwave and ultrasonic generators to stimulate biochemical processes. The effects of increasing organic loading rate (OLR) ranging from 1.0 g chemical oxygen demand (COD)/L·d to 4.0 g COD/L·d on treatment performance, biogas production, and percentage of methane yield were determined. The highest organic compounds removals (about 85% as COD and total organic carbon—TOC) were obtained at OLR of 1.0–2.0 g COD/L·d. The highest biogas yield of 0.33 ± 0.03 L/g COD removed and methane content in biogas of 68.1 ± 5.8% were recorded at OLR of 1.0 g COD/L·d, while at OLR of 2.0 g COD/L·d it was 0.31 ± 0.02 L/COD removed and 66.3 ± 5.7%, respectively. Increasing of the OLR led to a reduction in biogas productivity as well as a decrease in methane content in biogas. The best technological effects were recorded in series with an operating mode of ultrasonic generators of 2 min work/28 min break. More intensive sonication reduced the efficiency of anaerobic digestion of dairy wastewater as well as biogas production. A low nutrient removal efficiency was observed in all tested series of the experiment, which ranged from 2.04 ± 0.38 to 4.59 ± 0.68% for phosphorus and from 9.67 ± 3.36 to 20.36 ± 0.32% for nitrogen. The effects obtained in the study (referring to the efficiency of wastewater treatment, biogas production, as well as to the results of economic analysis) proved that the HFAR can be competitive to existing industrial technologies for food wastewater treatment.

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“…The growing interest for the high impact treatment of industrial waste water trickling lter is being used (Raj and Murthy 1999). In case of trickling lter the wastewater is applied on the bio carrier on which bio lm are developed and the organic matter present in the wastewater are decomposed by bio lm with the help of microbes which are residing inside bio lm.…”

Section: )mentioning

confidence: 99%

Present Scenario of Dairy Wastewater Treatment: A State of Art Review

Das

Paul

2022

Preprint

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Dairy industry is one of the leading consumer of water and producer of wastewater. Increased demand of dairy products results in rapid growth of dairy industry and hence wastewater production increases. Dairy effluent contains high concentrations of organic and inorganic substances that cause eutrophication in water bodies. This review study emphasizes on various treatment methods of DWW for period 2002 to 2021. Dairy wastewater imposes serious environmental concern because of the presence of wide range of fatty acids, proteins, nutrients, and other organics. These contaminants are difficult to treat in single step conventional treatment technique. In recent years much attention has been given for integrated system of dairy wastewater (DWW) treatment. The present review has deep insight for ongoing development in various treatment techniques of dairy wastewater. Moreover, this article intricate issue related with treatment followed by a brief discussion on the biological technique and special emphasis has been on the bio-filtration process. Extensive review study found that bio filtration method is environmentally sustainable and economically affordable technology as it requires minimal maintenance and low operating cost; filter media can be coarse gravel, stone, bio-carrier. Literature survey found that the bio-filtration process has the efficiency of removing BOD, COD, TP, TN (91.7–97.5, 74.1–99%, 98.3%, 88-91.5%). Fresh water crisis demands the reuse of DWW for non-potable purposes. Reuse of DWW in food, plastic, fuel, health and pharmaceutical industries helps to convert its zero value to a potential resource.

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Comparison of the trickling filter models for the treatment of synthetic dairy wastewater

Cited by 14 publications

References 1 publication

Evaluation of the Catalytic Performance of Gas‐Evolving Electrodes using Local Electrochemical Noise Measurements

Evaluation of the Catalytic Performance of Gas‐Evolving Electrodes using Local Electrochemical Noise Measurements

Evaluation of Anaerobic Digestion of Dairy Wastewater in an Innovative Multi-Section Horizontal Flow Reactor

Present Scenario of Dairy Wastewater Treatment: A State of Art Review

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