scholarly journals MAGNETIC CHITOSAN NANOCOMPOSITES AS ADSORBENTS IN INDUSTRIAL WASTEWATER TREATMENT: A BRIEF REVIEW

2021 ◽  
Vol 55 (1-2) ◽  
pp. 185-205
Author(s):  
MOHAMMAD JAVAD SHARIFI ◽  
AMIDEDDIN NOURALISHAHI ◽  
AHMAD HALLAJISANI ◽  
MAHDI ASKARI
Keyword(s):  
Wastewater Treatment ◽  
Magnetic Nanoparticles ◽  
Industrial Waste ◽  
Industrial Wastewater ◽  
Synthesis Methods ◽  
Waste Streams ◽  
Magnetic Chitosan ◽  
Operational Conditions ◽  
Increasing Demand ◽  
Marine Polysaccharide

In recent decades, the increasing demand for chemicals has led to producing large volumes of wastewater streams, which should be treated before their release into the environment. Chitosan, a marine polysaccharide derived from chitin, has recently attracted great attention as a promising adsorbent to eliminate ionic dyes and metals from industrial waste streams. Nevertheless, chitosan has its drawbacks, such as its rather weak mechanical properties, low surface area and difficult separation from final streams. The incorporation of magnetic nanoparticles into chitosan may be considered as one of the most effective remedies for the mentioned challenges. This paper addresses the efforts that have been recently made for the application of magnetic nanoparticles/chitosan nanocomposites (MCNCs) as adsorbents in wastewater treatment. In this regard, the synthesis methods, physicochemical properties, and the effects of operational conditions on the performance of MCNCs have been reviewed. The adsorption kinetics, isotherms, and mechanisms are also highlighted.

Preparation and Application of Polymer-Metal Oxide Nanocomposites in Wastewater Treatment

2020 ◽  
pp. 83-102
Author(s):  
Victor Odhiambo Shikuku ◽  
Wilfrida N. Nyairo
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Metal Oxides ◽  
Low Cost ◽  
Drinking Water Treatment ◽  
Synthesis Methods ◽  
Operational Conditions ◽  
Polymer Metal ◽  
Treatment Technologies ◽  
Sustainable Wastewater Treatment

The search for efficient and sustainable wastewater treatment technologies is a subject of continuing research. This is due to the emergence of new classes of water contaminants that are recalcitrant to the conventional wastewater treatment technologies and the stringent allowable limits for contaminant levels set by environmental management authorities. The chapter discusses the developments in synthesis methods and application of polymer-metal oxides as emerging facile materials for wastewater treatment. The varying uses of polymer-metal oxides for different processes in water treatment under varying operational conditions and their performance for different pollutants are critically analyzed. Their strengths and inherent limitations are also highlighted. The chapter demonstrates that polymer-metal oxides are facile low-cost and efficient materials and can be integrated in wastewater and drinking water treatment systems.

Molecular monitoring of bulking sludge in industrial wastewater treatment plants

2002 ◽  
Vol 46 (1-2) ◽  
pp. 551-558 ◽  
Author(s):  
J. van der Waarde ◽  
J. Krooneman ◽  
B. Geurkink ◽  
A. van der Werf ◽  
D. Eikelboom ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Textile Industry ◽  
Industrial Wastewater ◽  
Wastewater Treatment Plants ◽  
In Situ Hybridisation ◽  
Filamentous Bacteria ◽  
Molecular Monitoring ◽  
Industrial Wastewater Treatment ◽  
Operational Conditions ◽  
Filamentous Microorganisms

Fluorescent In Situ Hybridisation (FISH) was used to monitor the presence of filamentous microorganisms in industrial wastewater treatment plants (WWTPs). Monitoring with a restricted set of FISH probes in WWTPs from potato industry showed growth and decline of Thiothrix populations that could be linked to operational procedures. In a follow up project new FISH probes were developed for filamentous bacteria in industrial WWTPs and 70 WWTPs were analysed for presence of these filaments. Several newly described species of filamentous bacteria appear to be common and dominant in industrial WWTPs. Monitoring of a WWTP from textile industry showed growth and decline of one of these organisms when operational conditions in the plant were varied. The present paper demonstrates that bulking sludge in industrial wastewater treatment plants can effectively be monitored using a combination of standard chemical analyses and the FISH technique.

Nutrient removal and recovery from nitrogen- and phosphorus-laden waste streams in the form of struvite

2011 ◽  
Vol 6 (4) ◽  
Author(s):  
Q.L. Zhao ◽  
J. Ding
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Engineering Application ◽  
Organic Load ◽  
Waste Streams ◽  
Nitrogen And Phosphorus ◽  
Operational Conditions ◽  
Software Model ◽  
Efficient Recovery ◽  
Removal And Recovery

For the purpose of waste conversion into resources, removal and recovery of nutrients from different scenarios of nitrogen- and phosphorus-laden waste streams in the form of struvite (MgNH4PO4 6H2O, MAP) were presented in this paper. Nutrients-laden waste streams included urine, landfill leachate, industrial wastewater and the side streams in wastewater treatment plants etc. Batch experiments and software model were applied to obtain the optimal operational conditions. Several kinds of struvite reactors were introduced and compared. Under the optimal conditions, the recovery efficiency of NH4+-N and PO43–-P from urine separation could reach above 95% and 85%, respectively, while highly efficient recovery of nutrients was also realized for other kinds of wastewater. Some engineering examples on struvite crystallization were also discussed, indicating a feasible process for engineering application. Furthermore, the struvite recovered could not only be reused as a fertilizer, but also significantly reduce the organic load of wastewater treatment plants and improve effluent quality.

Experience of 16 Years' Operation and Maintenance of the Fukashiba Industrial Wastewater Treatment Plant of the Kashima Petrochemical Complex – I. Operation and Maintenance

1988 ◽  
Vol 20 (10) ◽  
pp. 193-200 ◽  
Author(s):  
Y. Okawa ◽  
S. Shinozuka ◽  
R. Ota ◽  
S. Matsui
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Industrial Wastewater ◽  
Municipal Wastewater ◽  
Thermal Power ◽  
Treatment Plant ◽  
Industrial Wastewater Treatment ◽  
Operational Conditions ◽  
Petrochemical Complex ◽  
Operation And Maintenance

The Kashima petrochemical complex and the Fukashiba industrial wastewater treatment plant are described. The complex consists of 19 core factories (petroleum, petrochemicals, and thermal power generation) and 39 other factories (including organic chemicals, foods, metals, machinery, etc.). The total amount of industrial wastewater produced is 59,800 m3/day. The treatment plant also accepts municipal wastewater from the surrounding area, totalling 1,100 m3/d. A system for charging for the industrial wastewater has been introduced. The water quality standards for the industrial wastewater discharged to the sewerage system and the effluent of the treatment plant are described. The main treatment process is activated sludge with operational conditions of high dissolved oxygen and long solids retention time (SRT). These operational conditions solved the problems of high ammonia and refractory substances in the influent. Complete nitrification occurred under the low alkalinity conditions and the effluent COD was low due to the long SRT. Successful operation and maintenance were achieved by good co-operation between the factories and the treatment plant.

Preparation and Application of Polymer-Metal Oxide Nanocomposites in Wastewater Treatment

2021 ◽  
pp. 393-407
Author(s):  
Victor Odhiambo Shikuku ◽  
Wilfrida N. Nyairo
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Metal Oxides ◽  
Low Cost ◽  
Drinking Water Treatment ◽  
Synthesis Methods ◽  
Operational Conditions ◽  
Polymer Metal ◽  
Treatment Technologies ◽  
Sustainable Wastewater Treatment

The search for efficient and sustainable wastewater treatment technologies is a subject of continuing research. This is due to the emergence of new classes of water contaminants that are recalcitrant to the conventional wastewater treatment technologies and the stringent allowable limits for contaminant levels set by environmental management authorities. The chapter discusses the developments in synthesis methods and application of polymer-metal oxides as emerging facile materials for wastewater treatment. The varying uses of polymer-metal oxides for different processes in water treatment under varying operational conditions and their performance for different pollutants are critically analyzed. Their strengths and inherent limitations are also highlighted. The chapter demonstrates that polymer-metal oxides are facile low-cost and efficient materials and can be integrated in wastewater and drinking water treatment systems.

Microbial-based magnetic nanoparticles production: a mini-review

2021 ◽  
Author(s):  
Victor Chmykhalo ◽  
Anna Belanova ◽  
Mariya Belousova ◽  
Vera Butova ◽  
Yuriy Makarenko ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Biomedical Application ◽  
Continuous Production ◽  
Production Equipment ◽  
Synthesis Methods ◽  
Microbial Synthesis ◽  
Proper Selection ◽  
Increasing Demand ◽  
Selection Of ◽  
Precursor Ions

Abstract The ever-increasing biomedical application of magnetic nanoparticles (MNPs) implies increasing demand in their scalable and high-throughput production, with finely tuned and well-controlled characteristics. One of the options to meet the demand is microbial production by nanoparticles-synthesizing bacteria. This approach has several benefits over the standard chemical synthesis methods, including improved homogeneity of synthesis, cost-effectiveness, safety and eco-friendliness. There are, however, specific challenges emanating from the nature of the approach that are to be accounted and resolved in each manufacturing instance. Most of the challenges can be resolved by proper selection of the producing organism and optimizing cell culture and nanoparticles extraction conditions. Other issues require development of proper continuous production equipment, medium usage optimization and precursor ions recycling. This mini-review focuses on the related topics in microbial synthesis of MNPs: producing organisms, culturing methods, nanoparticles characteristics tuning, nanoparticles yield and synthesis timeframe considerations, nanoparticles isolation as well as on the respective challenges and possible solutions.

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.

APPLICATION OF THE FLOCCULATION PROCESS IN THE INDUSTRIAL WASTEWATER TREATMENT

2016 ◽  
Vol 15 (3) ◽  
pp. 521-526
Author(s):  
Narcis Barsan ◽  
Mariana Turcu ◽  
Emilian Mo.negu.u ◽  
Mihaela Dascalu ◽  
Dana Chitimus ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Industrial Wastewater Treatment ◽  
Flocculation Process
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