Low-strength electronic wastewater treatment using immobilized cells of TMAH-degrading bacterium followed by activated carbon adsorption

2014 ◽  
Vol 54 (13) ◽  
pp. 3639-3645 ◽  
Author(s):  
Benqin Yang ◽  
Hyunseok Oh ◽  
Yongwoo Lee ◽  
Jinwook Jung ◽  
Deokjin Jahng
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Immobilized Cells ◽  
Activated Carbon Adsorption ◽  
Carbon Adsorption ◽  
Degrading Bacterium ◽  
Low Strength

Study on Hair Dyeing Wastewater Treatment by the Union Process of Adsorption Coagulation and Potassium Permanganate Oxide

2014 ◽  
Vol 675-677 ◽  
pp. 638-642 ◽  
Author(s):  
Jun Yin ◽  
Ying Hu
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Potassium Permanganate ◽  
Combined Treatment ◽  
Market Demand ◽  
Activated Carbon Adsorption ◽  
Removal Rates ◽  
Hair Dye ◽  
Carbon Adsorption ◽  
Oxidative Hair Dye

The amount of hair dye wastewater largest stage formed by oxidative hair dye in terms of quantity and quality, there is a serious pollution problem in the aquatic environment. Through analysis of the main component of hair dye to verify the use of activated carbon adsorption - Coagulation - potassium permanganate oxidation technology of wastewater treatment which is effective measures.According to different types of hair dye,about 80% of the market demand oxidative hair dye brown was selected to study. The results showed that the COD of 2427mg / L, the chromaticity of the hair 1000 times wastewater using 1300mg / L activated carbon adsorption treatment alone, the removal rates were 37.79%, 18.29%; in this condition and 140mg / L of mixed PAC condensate combined treatment, removal rates were 90.09%, 90.56%; potassium permanganate solution 70mg / L continues oxidation treatment, the removal rate reached 90.34 %, 97.37 %.

Evaluating odour control technologies using reliability and sustainability criteria – a case study for water treatment plants

2014 ◽  
Vol 69 (7) ◽  
pp. 1426-1433 ◽  
Author(s):  
N. J. R. Kraakman ◽  
J. M. Estrada ◽  
R. Lebrero ◽  
J. Cesca ◽  
R. Muñoz
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Activated Sludge ◽  
Economies Of Scale ◽  
Water Recycling ◽  
Activated Carbon Adsorption ◽  
Process Economics ◽  
Carbon Adsorption ◽  
Odour Control ◽  
Odour Concentration

Technologies for odour control have been widely reviewed and their optimal range of application and performance has been clearly established. Selection criteria, mainly driven by process economics, are usually based on the air flow volume, the inlet concentrations and the required removal efficiency. However, these criteria are shifting with social and environmental issues becoming as important as process economics. A methodology is illustrated to quantify sustainability and robustness of odour control technology in the context of odour control at wastewater treatment or water recycling plants. The most commonly used odour abatement techniques (biofiltration, biotrickling filtration, activated carbon adsorption, chemical scrubbing, activated sludge diffusion and biotrickling filtration coupled with activated carbon adsorption) are evaluated in terms of: (1) sustainability, with quantification of process economics, environmental performance and social impact using the sustainability metrics of the Institution of Chemical Engineers; (2) sensitivity towards design and operating parameters like utility prices (energy and labour), inlet odour concentration (H2S) and design safety (gas contact time); (3) robustness, quantifications of operating reliability, with recommendations to improve reliability during their lifespan of operations. The results show that the odour treatment technologies with the highest investments presented the lowest operating costs, which means that the net present value (NPV) should be used as a selection criterion rather than investment costs. Economies of scale are more important in biotechniques (biofiltration and biotrickling filtration) as, at increased airflows, their reduction in overall costs over 20 years (NPV20) is more extreme when compared to the physical/chemical technologies (chemical scrubbing and activated carbon filtration). Due to their low NPV and their low environmental impact, activated sludge diffusion and biotrickling filtration are in general the most cost-effective, and probably the technologies to be considered first for odour treatment in a wastewater treatment or water recycling plant. When, in an economical and risk evaluation, the reliability is counted to be as relevant as the overall costs, a hybrid technology (biotrickling filtration with activated carbon polishing) would be comparable to biotrickling filtration and activated sludge diffusion as the most preferred technologies, when all technologies are designed to have a 99% reduction of H2S and a 95% reduction of the odour concentration.

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