scholarly journals Magnetic Nanocomposite Material Containing Chitosan Polymer Used in Wastewater Depollution Processes

2021 ◽  
Vol 57 (4) ◽  
pp. 70-76
Author(s):  
Cristina Ileana Covaliu ◽  
Ecaterina Matei ◽  
Oana Stoia ◽  
Gigel Paraschiv
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Nanocomposite Material ◽  
Magnetic Nanocomposite ◽  
Lead Ions ◽  
Treatment Efficiency ◽  
Experimental Conditions ◽  
Nanocomposite Adsorbent ◽  
Chitosan Composite

The aim of this paper was to present the synthesis, characterization and application of the Fe3O4 - chitosan composite as potential adsorbent for removing lead ions from industrial wastewater. The nanocomposite nanomaterial was characterized by XRD and SEM analyzes. The influence of some parameters (pH of wastewater, lead ions concentration and dose of Fe3O4 - chitosan absorbent) upon the efficiency of wastewater treatment were investigated. The Pb (II) ions concentrations in wastewater were 0.5, 1, 1.5 and 2 mg/L. The amounts of Fe3O4 - chitosan nanocomposite adsorbent tested were 0.05, 0.1 and 0.2 g. In some experimental conditions, Fe3O4 - chitosan nanocomposite adsorbent leaded to obtaining of 100% wastewater treatment efficiency.

RESEARCH AND EVALUATE TREATMENT EFFICIENCY ON TAPIOCA PROCESSING INDUSTRIAL WASTEWATER BY AEROBIC BIOFILTER TECHNOLOGY WITH VARIOUS MATERIALS

2010 ◽  
Vol 13 (3) ◽  
pp. 54-66
Author(s):  
Phuong Thi Thanh Nguyen ◽  
Phuoc Van Nguyen ◽  
Anh Cam Thieu
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Utilization Rate ◽  
Organic Loading ◽  
Treatment Efficiency ◽  
Research Results ◽  
Loading Rates

This study was performed to evaluate the efficiency of tapioca processing wastewater treatment using aerobic biofilter with variety of biofilter media: coir, coal, PVC plastic and Bio - Ball BB15 plastic. Research results in the lab demonstrated all four aerobic biofilter models processed can treated completely N and COD which COD reached 90-98% and N reached 61-92%, respectively, at the organic loading rates in range of 0.5, 1, 1.5 and 2 kgCOD/m3.day. The results identified coir filter was the best in four researched materials with removal COD and specific substract utilization rate can reach 98%, and 0.6 kg COD/kgVSS.day. Research results open the new prospects for the application of the cheap materials, available for wastewater treatment.

Biofilters: flexible, reliable biological reactors

1994 ◽  
Vol 29 (10-11) ◽  
pp. 33-38 ◽  
Author(s):  
R. Pujol ◽  
M. Hamon ◽  
X. Kandel ◽  
H. Lemmel
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Wastewater Treatment Plants ◽  
Operating Parameters ◽  
Treatment Efficiency ◽  
High Treatment

More than fifty wastewater treatment plants worldwide (representing several millions p.e) are equipped with up-flow biofiltration reactors (BioforR). Their range of application encompasses municipal as well as industrial wastewater. A summary of the results achieved in a large number of plants is presented, accompanied by a description of the operating parameters and the treatment limitations with regard to various pollutants (C, N, P). The separation of functions into specific reactors combined with optimized wash conditions guarantees high treatment efficiency.

scholarly journals Manganese Ions Removal from Industrial Wastewater

2020 ◽  
Vol 71 (7) ◽  
pp. 391-396
Author(s):  
Eugeniu Vasile ◽  
Cristina-Ileana Covaliu ◽  
Oana Stoian ◽  
Gigel Paraschiv ◽  
Ecaterina Matei ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Treatment Process ◽  
Adsorption Process ◽  
Treatment Time ◽  
Correlation Coefficients ◽  
Manganese Ions ◽  
Treatment Efficiency ◽  
Wastewater Treatment Process ◽  
Langmuir And Freundlich Models

In this study the removal of Mn (II) ions from wastewater using magnetite nanomaterial was investigated. Some factors influencing the wastewater treatment process were studied such as: treatment time, pH and the concentration of Mn (II) ions from wastewater. The results showed that using magnetite nanomaterial adsorbent lead to a wastewater treatment efficiency higher than 97%. Langmuir and Freundlich models were applied to describe the adsorption process. The correlation coefficients (R2) showed that both models are applicable to the experimental data obtained.

scholarly journals Recent Development in Ammonia Stripping Process for Industrial Wastewater Treatment

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Lennevey Kinidi ◽  
Ivy Ai Wei Tan ◽  
Noraziah Binti Abdul Wahab ◽  
Khairul Fikri Bin Tamrin ◽  
Cirilo Nolasco Hipolito ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Packed Bed ◽  
Ammonia Nitrogen ◽  
Treatment Efficiency ◽  
Industrial Wastewater Treatment ◽  
Ammonia Stripping ◽  
Stripping Method ◽  
Nitrogen Contamination ◽  
Treatment Application

It is noteworthy to highlight that ammonia nitrogen contamination in wastewater has been reported to pose a great threat to the environment. This conventional method of remediating ammonia nitrogen contamination in wastewater applies the packed bed tower technology. Nevertheless, this technology appears to pose several application issues. Over the years, researchers have tested various types of ammonia stripping process to overcome the shortcomings of the conventional ammonia stripping technology. Along this line, the present study highlights the recent development of ammonia stripping process for industrial wastewater treatment. In addition, this study reviews ammonia stripping application for varied types of industrial wastewater and several significant operating parameters. Furthermore, this paper discusses some issues related to the conventional ammonia stripper for industrial treatment application. Finally, this study explicates the future prospects of the ammonia stripping method. This review, hence, contributes by enhancing the ammonia stripping treatment efficiency and its application for industrial wastewater treatment.

scholarly journals Treatment of Organics Contaminated Wastewater by Ozone Micro-Nano-Bubbles

Water ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 55 ◽  
Author(s):  
Zhiran Xia ◽  
Liming Hu
Keyword(s):  
Wastewater Treatment ◽  
Dissolution Rate ◽  
Aqueous Phase ◽  
Industrial Wastewater ◽  
Considerable Effect ◽  
Treatment Efficiency ◽  
Rapid Decomposition ◽  
Effects Of Ph ◽  
Novel Method ◽  
Acidic Conditions

The efficiency of ozone for the treatment of organics contaminated wastewater is limited by its slow dissolution rate and rapid decomposition in the aqueous phase. Micro-nano-bubbles (MNBs) are a novel method to prolong the reactivity of the ozone in the aqueous phase, thereby accelerating the treatment of the contaminant. In this study, the effects of pH and salinity on the treatment efficiency of ozone MNBs were examined. The highest efficiency was observed in weak acidic conditions and an increase in salinity enhanced the treatment efficiency significantly. Furthermore, the treatment of highly saline industrial wastewater as well as multi-contaminant groundwater containing persistent organics were also investigated. Treatment using ozone MNBs had a considerable effect on wastewaters that are otherwise difficult to treat using other methods; hence, it is a promising technology for wastewater treatment.

Application of ozonation to reduce biological sludge production in an industrial wastewater treatment plant

2008 ◽  
Vol 58 (10) ◽  
pp. 1971-1976 ◽  
Author(s):  
J. S. Albuquerque ◽  
J. C. Domingos ◽  
G. L. Sant'Anna ◽  
M. Dezotti
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Industrial Wastewater ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Yield Coefficient ◽  
Experimental Conditions ◽  
Industrial Wastewater Treatment ◽  
Biological Sludge ◽  
Sludge Production

Biosolids production in the activated sludge process generates an additional cost to wastewater treatment plants due to the growing requirements for sludge treatment and disposal. This work focuses on the application of ozonation to reduce sludge production in an industrial wastewater treatment plant. The results show that ozonation was able to promote cell wall rupture, releasing intracellular matter into the liquid medium. This effect was observed by the increase in concentrations of DNA (1.14 to 7.83 mg/L) and proteins (0.5 to 45.602 mg/L) in the liquid phase, when ozonation was applied during 10 min, using 30 mg/L of ozone. Reduction of sludge production was assessed by calculating the observed sludge yield coefficient (Y) in bench-scale continuous experiments conducted with varying proportions of ozonated sludge in the recycle stream and recycle ratios. Reduction of sludge production ranged from 14 to 39%, depending on the experimental conditions. The best result in terms of sludge excess reduction was achieved when 20% of the recycle sludge was ozonated and the recycle ratio was 0.67.

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