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.

Study on Mechanism of Removing the Organic Matter in Heavy Oil Sewage by the Electric Flocculation Method

2012 ◽  
Vol 535-537 ◽  
pp. 2201-2208
Author(s):  
Yong Wang ◽  
Jie Nian Jie ◽  
Zhi Yong Li ◽  
Li Guo Wang ◽  
Jiang Wu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Heavy Oil ◽  
Tin Dioxide ◽  
Electrochemical Treatment ◽  
Oily Wastewater ◽  
Treatment Technology ◽  
Before And After ◽  
Treatment Technologies ◽  
Oily Wastewater Treatment

Oily sewage is one of the wastes produced in the oil industry production process and its quantity has been increasing year by year, which influences the environment and human health severely. Electric flocculation method is one of the wide application electrochemical treatment technologies for the oily wastewater treatment at home and abroad, which has higher efficiency than other technologies at the aspect of the organic pollutants degradation. A simulative experiment device dealing with heavy oil sewage by the electric flocculation method has been designed in this paper. The mechanism of the electric flocculation method in removing organic matter of the heavy oil sewage by analyzing the change of the composition and content of the organic matter in water samples before and after the process of the electric flocculation has been studied. Research results show: the carbon/tin dioxide electrode is better than the carbon/ ruthenium dioxide electrode in removing organic matter; most alkanes matters in the oily wastewater have been removed in the dispersing oil form by the electric flocculation; as the current density increases, the types and quantity of the response organic matter can be improved while types of the new synthetic organics increase. At the same time, this paper provides a theory support in specific optimization of the electricity flocculation flotation in oily wastewater treatment technology and process.

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 Effect of vibration on the efficiency of ultrafiltration

2021 ◽  
Vol 15 (1) ◽  
pp. 37-44
Author(s):  
Szabolcs Gyula Szerencsés ◽  
Sándor Beszédes ◽  
Zsuzsanna László ◽  
Gábor Veréb ◽  
Balázs Szegedi ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Membrane Fouling ◽  
Energy Demand ◽  
Membrane Filtration ◽  
The European Union ◽  
Treatment Technology ◽  
Filtration Resistance ◽  
Filtration System ◽  
Total Filtration ◽  
Sustainable Wastewater Treatment

Nowadays, several environmental challenges are present to cope with. One with outstanding importance is the protection of our water supplies, therefore examination of wastewater treatment technology is a priority, especially in the European Union. In this work, the effect of membrane module vibration amplitude on the efficiency of ultrafiltration (UF) was investigated in a vibratory shear enhanced membrane filtration system. Based on the results of model dairy effluent UF and statistical analysis, the maximum vibration level available resulted in the most efficient filtration process, due to the most significant reduction of membrane fouling. From our results it was observed that the permeate fluxes more than doubled, specific energy demand was roughly halved, with almost identical retentions for organic matter, and total filtration resistance was reduced to less than half. Results also showed that setting the optimal operating parameters, an advantageous, efficiency focused, and sustainable wastewater treatment technology can be established.

Reality or myth: “Advanced wastewater treatment technologies cannot be cost competitive with conventional treatment processes”

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
Ali R. Ahmadi Motlagh ◽  
Stephen Lacy ◽  
Madan Arora ◽  
Jim Ross ◽  
Jeff Misenhimer
Keyword(s):  
Wastewater Treatment ◽  
Conventional Treatment ◽  
Treatment Plant ◽  
Advanced Treatment ◽  
Recycled Water ◽  
Treatment Technology ◽  
Treatment Processes ◽  
Treatment Technologies ◽  
Two Alternatives

With shortage of water becoming a major concern in many areas, use of recycled water is a necessity for a growing number of municipalities. This paper describes a case study in which two alternatives were considered for upgrading an existing wastewater treatment plant with the goal of producing recycled water. The first alternative consisted of conventional secondary and tertiary unit processes while the second alternative included the advanced treatment technology of membrane bioreactor (MBR). Also, two alternatives were evaluated for disinfection of recycled water; chlorine gas and UV system. The more advanced treatment technologies (MBR + UV), which produce the higher quality recycled water, resulted in higher cost. The paper discusses the design and project execution approaches as how the more expensive advanced treatment processes were made cost competitive with the conventional treatment processes.

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.

A bio-electrochemical membrane system for more sustainable wastewater treatment with MnO2/PANI modified stainless steel cathode and photosynthetic provision of dissolved oxygen by algae

2017 ◽  
Vol 76 (7) ◽  
pp. 1907-1914 ◽  
Author(s):  
Qiao Yang ◽  
Yang Lin ◽  
Lifen Liu ◽  
Fenglin Yang
Keyword(s):  
Stainless Steel ◽  
Wastewater Treatment ◽  
Dissolved Oxygen ◽  
Electricity Generation ◽  
Sewage Treatment ◽  
Membrane System ◽  
Pollutant Removal ◽  
Treatment Technology ◽  
Membrane Flux ◽  
Sustainable Wastewater Treatment

A competitive sewage treatment technology should meet the standard of water quality requirement and accomplish recovery of potential energy. This study presents such a new system, with coupled membrane bioreactor-microbial fuel cell features, which can not only treat wastewater, but also recovers energy from wastewater by electricity generation, and form a new resource by photosynthesis while providing the dissolved oxygen by algae. Specifically, in the system, the MnO2/polyaniline is used to modify the stainless steel mesh and to function well as system membrane and cathode, with satisfactory filtration and catalysis performance. The system enables continuous wastewater treatment with stable pollutant removal and electricity generation. Under the membrane flux of 119.4 Lm−2 h−1, a maximum power density of 1.2 W m−3 can be achieved, the algae multiply 6.1 times, and satisfactory wastewater treatment effect is achieved.

scholarly journals The Productivity Dynamics of China’s Environmentally Friendly Production Technologies in terms of Wastewater Treatment Techniques

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Fuxia Yang ◽  
Mian Yang ◽  
Jiangchuan Xu
Keyword(s):  
Wastewater Treatment ◽  
Technical Efficiency ◽  
Environmentally Friendly ◽  
Productivity Index ◽  
Productivity Change ◽  
Treatment Techniques ◽  
Treatment Technologies ◽  
Production Technologies ◽  
Productivity Dynamics ◽  
Environmentally Friendly Production

Low economic profit usually reduces the incentive of producers to operate their wastewater treatment technologies effectively. It is necessary to investigate the performance of environmentally friendly production technologies that reduce wastewater discharges and generate economic outputs simultaneously (EPTWs) in China over the past decade. In this paper, we apply the Malmquist-Luenberger productivity index widely used in the field of economics to evaluate the productivity change of EPTWs for 30 administrative provinces in China during 2003–2015. The pathways of the productivity change are further identified by decomposing the productivity index into two components: technological change and technical efficiency change. The results show that China’s environmental productivity index associated with wastewater reduction had undergone a downward trend, and evident spatial disparities are observed among the 30 provincial regions. Moreover, the changes of China’s environmental productivity over the whole studied period can mainly be attributed to technological progress, while the technical efficiency component has contributed little, although its annual contributing rate is in an increasing trend.

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.

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