... residues of pharmaceuticals in the environment were highlighted. In this regard, the preparation of a sectoral agreement is under way in Brazil, which is aimed at setting the terms and obligations of all the involved parties in the supply chain regarding reverse logistics in the context of drugs and ...
TiO2-Organics
... testing it on many different compounds, and in many different processes. To date, this technology has been used to detoxify drinking water, decontaminate industrial wastewater, and purify air streams. ...
... testing it on many different compounds, and in many different processes. To date, this technology has been used to detoxify drinking water, decontaminate industrial wastewater, and purify air streams. ...
APES Review for Final
... Directions: Answer the questions below using complete sentences. 1. Give examples of each: primary producers, primary consumers, secondary consumers, tertiary consumers, decomposers ...
... Directions: Answer the questions below using complete sentences. 1. Give examples of each: primary producers, primary consumers, secondary consumers, tertiary consumers, decomposers ...
CB(1) 2039/05
... Apart from pollution control, we have also taken proactive action in protecting our marine environment and conserving important ecological habitats and species. Four marine parks and one marine reserve have been designated to protect water areas of high ecological value including habitats for the Ch ...
... Apart from pollution control, we have also taken proactive action in protecting our marine environment and conserving important ecological habitats and species. Four marine parks and one marine reserve have been designated to protect water areas of high ecological value including habitats for the Ch ...
UNIVERSITY OF NAIROBI UNIVERSITY EXAMINATIONS 2005
... (c) The BOD in a bio-reactor was found to be 300mg/litres 2 days after the commencement of digestion, and 200mg/l 3 days later. What should be the bioreactor mean retention time to obtain a waste conversion efficiency of 90%? (6 marks) (d) How would you estimate the MRT of a continuous flow waste t ...
... (c) The BOD in a bio-reactor was found to be 300mg/litres 2 days after the commencement of digestion, and 200mg/l 3 days later. What should be the bioreactor mean retention time to obtain a waste conversion efficiency of 90%? (6 marks) (d) How would you estimate the MRT of a continuous flow waste t ...
4.4 Water Pollution
... • Types of aquatic pollutants include floating debris, organic material, inorganic plant nutrients (nitrates and phosphates), toxic metals, synthetic compounds, suspended solids, hot water, oil, radioactive pollution, pathogens, light, noise and biological pollutants (invasive species). • A wide ran ...
... • Types of aquatic pollutants include floating debris, organic material, inorganic plant nutrients (nitrates and phosphates), toxic metals, synthetic compounds, suspended solids, hot water, oil, radioactive pollution, pathogens, light, noise and biological pollutants (invasive species). • A wide ran ...
Secondary treatment
Secondary treatment is a treatment process for wastewater (or sewage) to achieve a certain degree of effluent quality by using a sewage treatment plant with physical phase separation to remove settleable solids and a biological process to remove dissolved and suspended organic compounds. After this kind of treatment, the wastewater may be called as secondary-treated wastewater.Secondary treatment is the portion of a sewage treatment sequence removing dissolved and colloidal compounds measured as biochemical oxygen demand (BOD). Secondary treatment is traditionally applied to the liquid portion of sewage after primary treatment has removed settleable solids and floating material. Secondary treatment is typically performed by indigenous, aquatic microorganisms in a managed aerobic habitat. Bacteria and protozoa consume biodegradable soluble organic contaminants (e.g. sugars, fats, and organic short-chain carbon molecules from human waste, food waste, soaps and detergent) while reproducing to form cells of biological solids. Biological oxidation processes are sensitive to temperature and, between 0 °C and 40 °C, the rate of biological reactions increase with temperature. Most surface aerated vessels operate at between 4 °C and 32 °C.