Magnetic bio-flocculation for cost-effective fast organic matters pre-concentration for sewage with enhanced capturing and settling of sludge

2021 ◽  
Author(s):  
Shuting Chen ◽  
Yukun Xing ◽  
Huimin Ou ◽  
Hongyue Liang ◽  
Xuening Song ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Magnetic Separation ◽  
Cost Effective ◽  
Chemical Additives ◽  
Organic Matters ◽  
Anaerobic Wastewater Treatment ◽  
Oxidation Processes ◽  
Carbon Neutral

Sewage pre-concentration has been promising for carbon-neutral anaerobic wastewater treatment. Magnetic bio-flocculation, which combines the advantages of the adsorption/bio-oxidation processes and magnetic separation for cost-effective, fast, and eco-friendly chemical-additives-free pre-concentration,...

High-rate anaerobic wastewater treatment: diversifying from end-of-the-pipe treatment to resource-oriented conversion techniques

2008 ◽  
Vol 57 (8) ◽  
pp. 1137-1148 ◽  
Author(s):  
Jules B. van Lier
Keyword(s):  
Wastewater Treatment ◽  
Organic Waste ◽  
Cost Effective ◽  
Anaerobic Treatment ◽  
High Rate ◽  
Anaerobic Wastewater Treatment ◽  
Current Trends ◽  
Cost Effective Treatment ◽  
Reductive Detoxification ◽  
Anaerobic Conversion

Decades of developments and implementations in the field of high-rate anaerobic wastewater treatment have put the technology at a competitive level. With respect to sustainability and cost-effectiveness, anaerobic treatment has a much better score than many alternatives. Particularly, the energy conservation aspect, i.e. avoiding the loss of energy for destruction of organic matter, while energy is reclaimed from the organic waste constituents in the form of biogas, was an important driver in the development of such systems. Invoked by the present greenhouse alert, the energy involved is nowadays translated into carbon credits, providing another incentive to further implement anaerobic technology. Anaerobic conversion processes, however, offer much more than cost-effective treatment systems. Selective recovery of metals, effective desulphurization, recovery of nutrients, reductive detoxification, and anaerobic oxidation of specific compounds are examples of the potentials of anaerobic treatment. This paper presents a survey on the state of the art of full-scale anaerobic high-rate treatment of industrial wastewaters and highlights current trends in anaerobic developments.

Cost Effective Wastewater Treatment by Natural Adsorbent

2018 ◽  
Vol 8 (4) ◽  
pp. 777-785
Author(s):  
Mahmudur Rahman Idris ◽  
Md. Arifuzzaman ◽  
Arnob Basak ◽  
Tonmoy Saha and Jarin Yasmin
Keyword(s):  
Wastewater Treatment ◽  
Cost Effective ◽  
Natural Adsorbent

scholarly journals A Simple Device for the On-Site Photodegradation of Pesticide Mixes Remnants to Avoid Environmental Point Pollution

2021 ◽  
Vol 11 (8) ◽  
pp. 3593
Author(s):  
Biagio Esposito ◽  
Francesco Riminucci ◽  
Stefano Di Marco ◽  
Elisa Giorgia Metruccio ◽  
Fabio Osti ◽  
...  
Keyword(s):  
Vibrio Fischeri ◽  
Analytical Data ◽  
Cost Effective ◽  
Freshwater Ecosystems ◽  
Point Sources ◽  
Pseudokirchneriella Subcapitata ◽  
Parent Molecule ◽  
Oxidation Processes ◽  
Sources Of Pollution ◽  
Pesticides In Water

The worldwide increase in the number and use of agrochemicals impacts nearby soil and freshwater ecosystems. Beyond the excess in applications and dosages, the inadequate management of remnants and the rinsing water of containers and application equipment worsen this problem, creating point sources of pollution. Advanced oxidation processes (AOPs) such as photocatalytic and photo-oxidation processes have been successfully applied in degrading organic pollutants. We developed a simple prototype to be used at farms for quickly degrading pesticides in water solutions by exploiting a UV–H2O2-mediated AOP. As representative compounds, we selected the insecticide imidacloprid, the herbicide terbuthylazine, and the fungicide azoxystrobin, all in their commercial formulation. The device efficiency was investigated through the disappearance of the parent molecule and the degree of mineralization. The toxicity of the pesticide solutions, before and during the treatment, was assessed by Vibrio fischeri and Pseudokirchneriella subcapitata inhibition assays. The results obtained have demonstrated a cost-effective, viable alternative for detoxifying the pesticide solutions before their disposal into the environment, even though the compounds, or their photoproducts, showed different sensitivities to physicochemical degradation. The bioassays revealed changes in the inhibitory effects on the organisms in agreement with the analytical data.

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