The effects of synthetic wastewater that contained 20 mg/L Cu(II) on the removal of organic pollutants in a sequencing batch reactor were investigated. Results of continuous 20 mg/L Cu(II) exposure for 120 days demonstrated that the chemical oxygen demand (COD) removal efficiency decreased to 42% initially, followed by a subsequent gradual recovery, which peaked at 78% by day 97. Effluent volatile fatty acid (VFA) concentration contributed 67 to 89% of the influent COD in the experimental reactor, which indicated that the degradation of the organic substances ceased at the VFA production step. Meanwhile, the varieties of soluble microbial products (SMP) content and main components (protein, polysaccharide, and DNA) were discussed to reveal the response of activated sludge to the toxicity of 20 mg/L Cu(II). The determination of Cu(II) concentrations in extracellular polymeric substances (EPS) and SMP throughout the experiment indicated an inverse relationship between extracellular Cu(II) concentration and COD removal efficiency.
Non-chemical Pre-plant Soil Disinfestation
The battle with pests, diseases and weeds is an everyday problem for every farmer. Due to the fact that 40% of the world’s food production is lost due to pests and diseases, farmers need to manage crop protection. An excellent example of the need for pesticides is cotton. It is a crop that is affected by various pests. Cotton farming accounts for more than 25% of all insecticides and 12% of all pesticides used worldwide. Although pesticides play a major role in crop protection, there is a global problem...
Perfectly clean water - without the use of toxic chemicals - Case Study
Bacteria-free surroundings breeds healthier and more productive cattle Danish Clean Water A/S is a manufacturer of ECA generators and has successfully marketed and deployed its generator for more than 5 years, sold to more than 20 countries through local partnerships and has thereby gained significant market power. The ECA generator can be used in various industries and production sites, but especially within animal husbandry in agriculture the results have been remarkable. Using an electrolysis process of...
Perfectly clean water without the use of toxic chemicals - The Poultry Industry - Case Study
Improved water quality increases earnings significantly, in the poultry industryBacterial contamination in drinking water can be heavily attributed to biofilm buildup inside the water pipes. Danish Clean Water manufactures a line of ECA generators that produce the disinfectant NEUTHOX, which is a highly effective terminator of biofilm.Improving the quality of animals’ drinking water is a crucial task that leads to enhancing animals’ health. Healthier livestock on the farm translate into lower expenses...
Bacteria-free water - without the use of toxic chemicals - Case Study
Aarhus University Hospital fought against Legionella bacteria – and won Legionella bacteria thrives in all hot-water supplies and Aarhus University Hospital, Risskov felt the problem firsthand. With the ECA generator from Danish Clean Water A/S they managed to significantly reduce the bacteria and thereby minimizing risks concerning Legionella.Virtually all hospitals, nursing homes, schools, sporting facilities, housing associations and even hotels have the occurrence of Legionella - many of them without...
Anti-fungal compounds: emerging environmental contaminants
Azole fungicides are active ingredients in a range of pharmaceutical and personal care products, and are also used in agriculture. This study reviewed the sources, presence and risks of these compounds in the environment, finding evidence of toxic effects on aquatic organisms. The researchers provide directions for future research and warn caution should be exercised until more toxicity data becomes available. Azole fungicides are used to treat fungal infections in agriculture and human medicine. Usually administe...