Methods of wastewater treatment

The conversion of the fish and shrimp wastes to produce value-added products brings economic benefits and reduces the risk of environmental pollution. This study presents a facile method for preparing nanohydroxyapatite/chitosan biocomposites (nHCB) for wastewater treatment and bacterial immobilization.

9p viberbers 09-08-2023 0 0   Download

Nitrogen removal with biological methods plays a crucial role in wastewater treatment technology. The treatment begins with the oxidation of ammonia to nitrite to facilitate the subsequent nitrification and denitrification. Various strains of ammonia-oxidising bacteria have been reported. In this study, we use three Bacillus bacteria isolated from swine wastewater to oxidise ammonia.

11p vispiderman 15-06-2023 1 1   Download

In nitrogen treatment with biological methods, nitrite metabolism is an intermediate process that facilitates other processes involving different bacteria strains. In this study, we isolated two nitriteoxidising bacteria strains from abattoir wastewater and wastewater from biogas tanks of an industrial pig farm in Ha Tinh province.

10p vispiderman 15-06-2023 2 1   Download

This paper studies the ability to treat ammonium in wastewater in pig farm by magnesium precipitation method. The research model includes 1 deposit tank, a reaction tank with dimensions of 30x30x40 cm and a stirring device.

8p viironman 02-06-2023 1 1   Download

The article studies the occurrence of microplastics in the inlet and outlet wastewater streams at wastewater treatment plants in the Saigon-Dong Nai river basin, Vietnam and provide a suitable removal solution. The sampling method is suitable for the actual conditions of Vietnam combined with the application of Fourier-transform infrared spectroscopy to analyze the microplastic composition in the sample.

13p viironman 02-06-2023 2 2   Download

The wastewater treatment plant (WWTP) in Ca Mau city, which is being planned for construction, will be responsible for treating domestic wastewater with a capacity of 8,000 m3 /day. After being treated by the physic-biological method, the plant’s wastewater will be discharged into the Thong Nhat canal and the Tac Thu river.

11p vicaptainmarvel 21-04-2023 3 2   Download

Ebook Endocrine disrupters in wastewater and sludge treatment processes: Part 1 presents the following chapters: Chapter 1: Scope of the problem, Chapter 2: Sources of endocrine disrupters, Chapter 3: Methods for the determination of endocrine disrupters, Chapter 4: Fate and behavior of endocrine disrupters in wastewater treatment processes.

159p runthenight08 12-04-2023 2 1   Download

Water treatment has been an essential issue with the increasing population over 40 years. Researchers center on the major organic pollutants, such as dyes, pesticides, and pharmaceutical products. Photocatalytic degradation is one of the promising methods for aquatic organic pollutant treatment. Over the years, scientists have been working on developments for photocatalysts to enhance their pollutant degradation performances.

18p lyhuyenthu 31-01-2023 4 2   Download

In this research, a combined photocatalytic and biological treatment is proposed for the elimination of pollutants present in textile wastewater using a natural erionite zeolite (PE) and aluminum oxide (PA) synthesized by the sol-gel method as photocatalysts, and solar radiation. Both catalysts were characterized by XRD, SEM, and EDS. For biological treatment two bacterial consortium were used: BC1 (Escherichia coli N16, Serratia k120, Pseudomonas putida B03 and Enterobacter hormaechei), and consortium BC2 (Escherichia coli N16, Serratia Mc107, Enterobacter N9, Enterobacter hormaechei Mc9).

11p lyhuyenthu 31-01-2023 4 2   Download

The inefficiency of wastewater treatment plants (WWTPs) to remove contaminants of emerging concern (CECs) leads to their continuous release to the environment. Consequently, CECs are present at low concentrations in the treated wastewater (TWW), producing unpredicted and unwanted effects on living organisms as they are discharged into water receiving bodies.

12p viginny 23-12-2022 5 3   Download

The growth of waterborne pathogens and the discharge of partially treated or non-treated chemical waste has become a severe environmental and health risk. Conventional wastewater treatment methods have become less effective, and most current techniques require multiple stages for the disinfection of antimicrobial-resistant (AMR) pathogens and the combined removal of toxic, non-biodegradable, or emerging priority pollutants from wastewater.

273p runordie3 06-07-2022 7 1   Download

Cultivation technology of Chlorella vulgaris shows great potential in wastewater treatment along with biomass collection for biofuel production. Suspended, autotrophic cultivation at various scales is still the main method to increase algal biomass in different stages of algae technology. In this study, C. vulgaris was cultured to proliferate in a 2 l suspension system to prepare biomass for immobilised cultivation in a biofilm photobioreactor.

15p vithales 19-04-2022 8 1   Download

Phytoremediation is a method of using plants to extract, isolate or detoxify pollutants through chemical, physical and biological processes. For years, this method has been considered as an effective method for wastewater treatment thanks to its high efficiency, low cost, stability, and simplicity of operation. Besides, this wastewater treatment technology is environmentally friendly since it increases biodiversity and contributesto the landscape of the environment and local ecosystems.

12p vinikolatesla 31-03-2022 12 1   Download

In this study, titanium dioxide was synthesized via solution combustion method. Titanium(IV) oxysulfate was used as a titanium source. The fuel type, reaction time, and reaction temperature were tested for optimization. The glycine was set as a suitable fuel. Structural properties of the final product were characterized by p-XRD. Scanning electron microscopy (SEM) and BET techniques were used to examine the morphology. The synthesized products were compared to the commercial TiO2 and it was found that the titanium dioxide with the high surface area (63.

9p tudichquannguyet 29-11-2021 9 0   Download

A wide range of products are produced in the chemical producing industry such as textile dyes, chemicals, printing dyes and chemicals, paper chemicals, electrostatic powder dyes, and optical brighteners. The aim of this study is to investigate the treatability of chemical oxygen demand (COD), aromaticity, and color in the wastewater of this sector, where highly complex chemicals are used. Most of the studies in the literature are related to the treatment of synthetically prepared dyed wastewater.

15p tudichquannguyet 29-11-2021 9 0   Download

In this study, the halloysite nanotube material will be fabricated from a natural halloysite mineral and used as a support for the photocatalytic activity phase based on TiO2. The material is characterized by modern physicochemical methods such as XRD, SEM, BET, UV - vis spectrum, and EDX. Accordingly, the refined halloysite has a nanoscale with a length of about 1.3 μm and a capillary size of about 5 nm. After the deposition of Ag - TiO2 on the halloysite, the specific surface of the material measured by the BET method was about 60 m2/g, and the structure of the halloysite was intact.

10p cothumenhmong12 08-07-2021 9 0   Download

Objectives of the thesis: The objective of this study is to develop an energy and nutrients recovering wastewater treatment process combining physicochemical and biological methods for NRP wastewater.

26p extraenglish 24-05-2021 15 0   Download

The wastewater treatment plant is an extremely important infrastructure to ensure the quality of life, water use of human life, and other ways to ensure water quality for the natural environment. In the operation of it, there are always potential hazards affecting the health of the workers working in the factory. The study was performed using the Semi-quantitative risk assessment method to calculate the values of operational risks in the water treatment plant (WWP).

14p cothumenhmong11 05-05-2021 15 0   Download

The research results of poly(1-naphthylamine)/Fe3O4 (PNA/Fe3O4) nanocomposites synthesized by a chemical method for As(III) wastewater treatment are presented in this paper. XRD patterns and TEM images showed that the Fe3O4 grain size varied from 13 to 20 nm. The results of Raman spectral analysis showed that PNA participated in part of the PNA/Fe3O4 composite samples. The grain size of PNA/Fe3O4 composite samples is about 25–30 nm measured by SEM.

10p tradaviahe14 01-02-2021 5 0   Download

This study, therefore, aimed to investigate the application of biochar from agricultural wastes to remove the excess nitrogen in domestic wastewater. In particular, this work examined the utilization of biochar obtained from coffee husk pyrolyzed at 350 oC to adsorb ammonium. Besides, adding biochar could be a simple and effective method for the initiation of activated sludge granulation to facilitate the treatment of low C/N ratio wastewater.

11p cothumenhmong9 04-01-2021 9 1   Download