scholarly journals Industrial Wastewater Treatment Technologies For Reuse, Recycle, And Recovery: Advantages, Disadvantages, And Gaps.

2021 ◽  
Author(s):  
Ricardo Mejía ◽  
Aymer Maturana ◽  
Diego Gómez ◽  
Christian Quintero ◽  
Luis Arismendy ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Environmental Safety ◽  
Economic Viability ◽  
Waste Processing ◽  
Hybrid Processes ◽  
Wide Range ◽  
Wastewater Quality ◽  
Treatment Technologies ◽  
Sustainable Wastewater Treatment

Abstract To reduce demand and discharge, instead of industrial wastewater being poorly treated and disposed of, it can be recycled, reused, or recovered if it is properly managed, thus having a substantial decrease in the water requirement and environmental impacts. The challenge is to select the appropriate process or combination of processes to achieve this based on the wastewater quality. Consequently, the objective of this investigation is to review every technology from conventional through advanced, for reliable and sustainable wastewater treatment and derived sludges, focusing on advantages, disadvantages, and technical gaps for development. Even though there is a wide range of possible technologies, it was evinced that there is huge potential to exploit and make them economically and sustainably viable for waste processing and circular economy, even in the mature massively implemented wastewater treatment technologies in the industry. Overall, we identify that independently from the technology to be studied, the future investigations on every unit, especially on those not vastly implemented, should be focused on: (1) The capacity in removing selected pollutants and decreasing impurities, (2) energy efficiency, (3) environmental safety, (4) economic viability, (5) hybrid processes, and (6) sustainability by waste processing.

The use of «coasorption» concept while describing the effect of coagulants on the wastewater aqua systems

2021 ◽  
pp. 33-39
Author(s):  
Е.В. Алексеев
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Practical Importance ◽  
Quantitative Relationship ◽  
Synthetic Dyes ◽  
Pollutant Concentrations ◽  
Wide Range ◽  
Complex Chemical Composition ◽  
The One ◽  
Raw Wastewater

Широкое распространение реагентного коагулирования в технологии очистки природных и промышленных сточных вод обусловлено, с одной стороны, сложностью химического состава и фазово-дисперсного состояния их аквасистем, с другой – многофакторностью действия на них коагулянтов. Рассмотрены основные механизмы взаимодействия коагулянтов и загрязняющих веществ на примере очистки промышленных сточных вод, содержащих органические вещества (поверхностно-активные вещества и синтетические красители). Физико-химическое понятие «коагуляция» отражает только один из механизмов действия коагулянтов на загрязнители. Принятые в настоящее время технологические показатели «доза коагулянта» и «удельная доза коагулянта» также не отражают многообразие взаимодействий загрязняющих веществ с солями коагулянтов и не привязаны к результату коагулирования. Это обусловливает трудность описания совокупного действия физико-химических процессов при добавлении коагулянтов в очищаемые воды и его количественной оценки. Решение проблемы возможно введением понятия «коасорбция», определяющего многофакторность взаимодействия коагулянтов с загрязняющими веществами в процессах очистки сточных вод коагулированием, и технологического показателя «удельная коасорбция», устанавливающего количественную взаимосвязь между величинами загрязняющих веществ в исходной и очищенной воде с дозой коагулянта. Графически представлены функции удельной коасорбции в форме изотерм коасорбции для двух типов поверхностно-активных веществ и синтетических красителей. На основании результатов анализа особенностей изотерм показано, что они отражают разные механизмы взаимодействия коагулянтов и загрязняющих веществ. Использование коасорбции как технологического понятия способствует выявлению механизмов взаимодействия загрязняющих веществ с коагулянтом и созданию наилучших условий для осуществления процесса коагулирования. Функциональное описание изотерм коасорбции позволяет экстраполировать результаты пробного коагулирования в широком интервале концентраций загрязняющих веществ. Практическое значение изотерм удельной коасорбции состоит в возможности определения доз реагентов при коагулировании воды по начальному содержанию загрязняющих веществ и требуемому в очищенных водах. The widespread use of chemical coagulation in purification of natural water and industrial wastewater is due, on the one hand, to the complex chemical composition and phase-disperse state of their aqua systems, and on the other hand, to the multifactorial effect of coagulants on them. The main mechanisms of interaction between coagulants and pollutants are considered through the example of industrial wastewater treatment containing organic substances (surfactants and synthetic dyes). The physicochemical term «coagulation» reflects only one of the mechanisms of the effect of coagulants on pollutants. The currently accepted process parameters «dose of coagulant» and «specific dose of coagulant» do not reflect the variety of interactions of pollutants with coagulant salts either, and are not linked to the result of coagulation. This makes it difficult to describe the collective effect of physicochemical processes while adding coagulants to the treated water and to quantify it. The solution to the problem is possible introducing the concept of «coasorption» that determines the multifactorial origin of the interaction of coagulants and pollutants in the processes of wastewater treatment by coagulation; and the process parameter «specific coasorption» that establishes a quantitative relationship between the concentrations of pollutants in raw wastewater and effluent with a dose of coagulant. The specific coasorption functions are graphically presented in the form of coasorption isotherms for two types of surfactants and synthetic dyes. Based on the results of the analysis of the features of the isotherms, it is shown that they reflect different mechanisms of interaction between coagulants and pollutants. The use of coasorption as a technological concept provides for identifying the mechanisms of interaction of pollutants with a coagulant and establishing the best conditions for the coagulation process. The functional description of the coasorption isotherms allows extrapolating the results of trial coagulation in a wide range of pollutant concentrations. The practical importance of specific coasorption isotherms provides for determining the dosages of chemicals during coagulation of water based on the initial concentration of pollutants and effluent standard.

scholarly journals Recent Advances in Dynamic Modeling and Process Control of PVA Degradation by Biological and Advanced Oxidation Processes: A Review on Trends and Advances

Environments ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 116
Author(s):  
Yi-Ping Lin ◽  
Ramdhane Dhib ◽  
Mehrab Mehrvar
Keyword(s):  
Wastewater Treatment ◽  
Process Control ◽  
Dynamic Modeling ◽  
Reaction Mechanisms ◽  
Industrial Wastewater ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes ◽  
Treatment Technologies ◽  
And Control

Polyvinyl alcohol (PVA) is an emerging pollutant commonly found in industrial wastewater, owing to its extensive usage as an additive in the manufacturing industry. PVA’s popularity has made wastewater treatment technologies for PVA degradation a popular research topic in industrial wastewater treatment. Although many PVA degradation technologies are studied in bench-scale processes, recent advancements in process optimization and control of wastewater treatment technologies such as advanced oxidation processes (AOPs) show the feasibility of these processes by monitoring and controlling processes to meet desired regulatory standards. These wastewater treatment technologies exhibit complex reaction mechanisms leading to nonlinear and nonstationary behavior related to variability in operational conditions. Thus, black-box dynamic modeling is a promising tool for designing control schemes since dynamic modeling is more complicated in terms of first principles and reaction mechanisms. This study seeks to provide a survey of process control methods via a comprehensive review focusing on PVA degradation methods, including biological and advanced oxidation processes, along with their reaction mechanisms, control-oriented dynamic modeling (i.e., state-space, transfer function, and artificial neural network modeling), and control strategies (i.e., proportional-integral-derivative control and predictive control) associated with wastewater treatment technologies utilized for PVA degradation.

scholarly journals Exposure Route of TiO2 NPs from Industrial Applications to Wastewater Treatment and Their Impacts on the Agro-Environment

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1469 ◽  
Author(s):  
Zahra Zahra ◽  
Zunaira Habib ◽  
Sujin Chung ◽  
Mohsin Ali Badshah
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Agricultural Soils ◽  
Wastewater Treatment Plants ◽  
Environmental Safety ◽  
Industrial Applications ◽  
Tio2 Nps ◽  
Potential Exposure ◽  
Exposure Route ◽  
Exposure Pathways

The tremendous increase in the production and consumption of titanium dioxide (TiO2) nanoparticles (NPs) in numerous industrial products and applications has augmented the need to understand their role in wastewater treatment technologies. Likewise, the deleterious effects of wastewater on the environment and natural resources have compelled researchers to find out most suitable, economical and environment friendly approaches for its treatment. In this context, the use of TiO2 NPs as the representative of photocatalytic technology for industrial wastewater treatment is coming to the horizon. For centuries, the use of industrial wastewater to feed agriculture land has been a common practice across the globe and the sewage sludge generated from wastewater treatment plants is also used as fertilizer in agricultural soils. Therefore, it is necessary to be aware of possible exposure pathways of these NPs, especially in the perspective of wastewater treatment and their impacts on the agro-environment. This review highlights the potential exposure route of TiO2 NPs from industrial applications to wastewater treatment and its impacts on the agro-environment. Key elements of the review present the recent developments of TiO2 NPs in two main sectors including wastewater treatment and the agro-environment along with their potential exposure pathways. Furthermore, the direct exposure routes of these NPs from production to end-user consumption until their end phase needs to be studied in detail and optimization of their suitable applications and controlled use to ensure environmental safety.

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.

scholarly journals Microalgae Brewery Wastewater Treatment: Potentials, Benefits and the Challenges

2019 ◽  
Vol 16 (11) ◽  
pp. 1910 ◽  
Author(s):  
David Kwame Amenorfenyo ◽  
Xianghu Huang ◽  
Yulei Zhang ◽  
Qitao Zeng ◽  
Ning Zhang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Alternative Energy ◽  
Animal Feed ◽  
Treatment Method ◽  
Environmental Safety ◽  
Biodiesel Production ◽  
Brewery Wastewater ◽  
Alternative Energy Source ◽  
Organic Nutrients

Concerns about environmental safety have led to strict regulations on the discharge of final brewery effluents into water bodies. Brewery wastewater contains huge amounts of organic compounds that can cause environmental pollution. The microalgae wastewater treatment method is an emerging environmentally friendly biotechnological process. Microalgae grow well in nutrient-rich wastewater by absorbing organic nutrients and converting them into useful biomass. The harvested biomass can be used as animal feed, biofertilizer, and an alternative energy source for biodiesel production. This review discusses conventional and current brewery wastewater treatment methods, and the application and potential of microalgae in brewery wastewater treatment. The study also discusses the benefits as well as challenges associated with microalgae brewery and other industrial wastewater treatments.

Sustainable Wastewater Treatment Technologies Based on Resource Recovery and Energy Utilization

2014 ◽  
Vol 955-959 ◽  
pp. 2060-2064
Author(s):  
Zhao Han Zhang ◽  
Li Jun Xiang ◽  
Qiu Yan Zou ◽  
Yu Jie Feng ◽  
Pei Rong Zhan
Keyword(s):  
Wastewater Treatment ◽  
Resource Recovery ◽  
Energy Utilization ◽  
Treatment Technology ◽  
Existing Problems ◽  
Treatment Models ◽  
Treatment Technologies ◽  
Production Technologies ◽  
Development Orientation ◽  
Sustainable Wastewater Treatment

In the context of global sustainable development, traditional wastewater treatment models reveal its shortcomings due to lack of recovering resource and energy in wastewater. Sustainable wastewater treatment technologies, taken wastewater as carriers of resource and energy, have been paid close attention. Starting from the existing problems of present wastewater treatment technology and focusing on the concept of resource recovery and energy utilization, this paper discussed the production technologies for hydrogen, electricity, diesel and methane from wastewater based on carbon resource recovery, and nitrogen resource treatment technologies with low energy consumption (such as shortcut nitrification-denitrification, ANAMMOX and SND). The latest research processes were also summarized. The research and development orientation of sustainable treatment technology for urban wastewater was put forward.

Current Nanotechnology Based Solutions for Sustainable Wastewater Treatment

2020 ◽  
Vol 16 ◽  
Author(s):  
Shabnam Murshid ◽  
Kannappan Panchamoorthy Gopinath ◽  
Dhakshinamoorthy Gnana Prakash
Keyword(s):  
Wastewater Treatment ◽  
Human Life ◽  
Domestic Wastewater ◽  
Wastewater Management ◽  
Nano Materials ◽  
Wastewater Remediation ◽  
Different Types ◽  
Treatment Technologies ◽  
Time Utilization ◽  
Sustainable Wastewater Treatment

Background: Industrialization plays an important role in the growth of a nation. But it is also one of the causes for the deteriorating condition of our ecosystem. The pollution, be it aquatic, terrestrial or air -borne, has affected our environment drastically and industrial and domestic wastewater plays a major role in it. As the Earth transforms into an urban sprawl, industries flourish, pollution increases and the natural resources deplete. Recently nano-engineering based technologies have been explored for the purpose of wastewater treatment which help in the detection and remediation of the pollutants present in wastewater. Various nano-material based technologies deployed in wastewater treatment are discussed in this article. Methods: A thorough survey of literature was effectuated, and study was focused mainly upon the different types of nano-materials applied for the purpose of wastewater management and the diverse treatment methods related to them. Literature were also studied to confirm the functionalization of nano-materials as pollution sensors. Results: There are four main kinds of nano-materials employed for the purpose of wastewater remediation i.e. metallic nano-materials, carbon based nano-materials, nanocomposites and dendrimers. The treatment technologies utilizing these materials are nanofiltration, nano-adsorption, nano-photocatalysis and disinfection. Conclusion: Nano-materials are quite efficient in removing the pollutants from different kinds of wastewater. But drawbacks such as expenditure and effect of the materials in the environment make it difficult for real-time utilization. Since the nano-scaled elements behave differently than their standard sized counterparts, the consequence of these materials in human life cycle is unknown. This knowledge gap should be filled so that these materials can be adopted worldwide.

Potential Applications of Nanomaterials in Wastewater Treatment

2019 ◽  
pp. 51-61 ◽  
Author(s):  
Hamidreza Sadegh ◽  
Gomaa A. M. Ali
Keyword(s):  
Wastewater Treatment ◽  
Conventional Treatment ◽  
Efficient Treatment ◽  
Treatment Techniques ◽  
Wide Range ◽  
The World ◽  
Potential Applications ◽  
Treatment Technologies ◽  
Quality Water ◽  
The Subject

High-quality water is one of the most important challenges around the world. Conventional techniques of wastewater treatment need to be developed. Therefore, finding sustainable, environmentally friendly, and efficient treatment techniques is required. In this regard, due to the extraordinary potential of nanotechnology resulted from nanoscale size characteristics, recently nanomaterials have been the subject of novel research and development worldwide. In this chapter, the authors review recent development of the direct applications of nanomaterial as an adsorbent in adsorption systems for integrating nanoparticles into conventional treatment technologies for wastewater treatment, especially a wide range of candidate nanomaterials and its properties. In addition, advantages and limitations as compared to existing processes are discussed.

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