Nitrification Studies at Non-limiting Substrate
... was detected by the presence of colonies after 14 days on plates of nutrient agar inoculated with suspect cultures. A strain of Nitrobacter agilis was provided by Dr N. Walker, Rothamsted Experimental Station, and the Nitrosomonas strain was isolated from china clay sand waste using the enrichment a ...
... was detected by the presence of colonies after 14 days on plates of nutrient agar inoculated with suspect cultures. A strain of Nitrobacter agilis was provided by Dr N. Walker, Rothamsted Experimental Station, and the Nitrosomonas strain was isolated from china clay sand waste using the enrichment a ...
Site 11 - Chester County, PA
... waterway. The pond size and depth were designed to support vertebrate populations that would be capable of controlling insect reproduction. Functions: Constructed wetlands, like this one, perform multiple stormwater management functions. This wetland, or wetland pond, controls stormwater runoff from ...
... waterway. The pond size and depth were designed to support vertebrate populations that would be capable of controlling insect reproduction. Functions: Constructed wetlands, like this one, perform multiple stormwater management functions. This wetland, or wetland pond, controls stormwater runoff from ...
NH -N removal from groundwater using attached growth reactor: Wilawan Khanitchaidecha
... There are several biotechnologies which have been proposed for effective NH4-N removal from groundwater such as biofix reactor, biofilter and swim-bed reactor [4-6]. However these methods require continuous aeration, which leads to increase in energy consumption and cost of purification process. Fur ...
... There are several biotechnologies which have been proposed for effective NH4-N removal from groundwater such as biofix reactor, biofilter and swim-bed reactor [4-6]. However these methods require continuous aeration, which leads to increase in energy consumption and cost of purification process. Fur ...
The Practice of Directly Observed Treatment (DOT)
... • Of 411 patients, 379 (92%) had been initially assigned to any type of observer and the remaining 32 patients were not assigned to any observer, because they refused to accept an observer (18), no suitable observers were available (9) or both (5). DOT was more often assigned to patients who were fe ...
... • Of 411 patients, 379 (92%) had been initially assigned to any type of observer and the remaining 32 patients were not assigned to any observer, because they refused to accept an observer (18), no suitable observers were available (9) or both (5). DOT was more often assigned to patients who were fe ...
Basic Chemistry of Chlorination
... or complicated installation. Package treatment plants usually do not have operators in attendance at all times. Hydro Instruments can provide an automatic switchover system that will transfer operation to a full cylinder eliminating the possibility of the chlorine supply running out when the operato ...
... or complicated installation. Package treatment plants usually do not have operators in attendance at all times. Hydro Instruments can provide an automatic switchover system that will transfer operation to a full cylinder eliminating the possibility of the chlorine supply running out when the operato ...
Analytical Technologies for Water Treatment Biofilms
... alternative technology that can replace a conventional denitrification treatment method using heterotrophic bacteria. Advantages of nitrogen treatment processes using anaerobic ammonium oxidizing bacteria are: (1) the running cost can be lowered than that of processes using heterotrophic bacteria and ...
... alternative technology that can replace a conventional denitrification treatment method using heterotrophic bacteria. Advantages of nitrogen treatment processes using anaerobic ammonium oxidizing bacteria are: (1) the running cost can be lowered than that of processes using heterotrophic bacteria and ...
bioremediation - UniMAP Portal
... plants to degrade chemical compounds Bioremediation – process of cleaning up environmental sites contaminated with chemical pollutants by using living organisms to degrade hazardous materials into less toxic substances ...
... plants to degrade chemical compounds Bioremediation – process of cleaning up environmental sites contaminated with chemical pollutants by using living organisms to degrade hazardous materials into less toxic substances ...
phosphate equilibrium between stream sediments and water
... Sediment−EPC0 is defined as the aqueous−phase P concentration at which net P adsorption and desorption by unaltered stream sediments is zero (Taylor and Kunishi, 1971). We used filtered stream water spiked with additional soluble P at rates of 0, 0.10, 0.25, 0.50, and 2.00 mg L−1; for example, if th ...
... Sediment−EPC0 is defined as the aqueous−phase P concentration at which net P adsorption and desorption by unaltered stream sediments is zero (Taylor and Kunishi, 1971). We used filtered stream water spiked with additional soluble P at rates of 0, 0.10, 0.25, 0.50, and 2.00 mg L−1; for example, if th ...
Aquaponics—Integrating Fish and Plant Culture
... microns), while filtration devices (e.g., microscreen filters, bead filters) remove settleable and suspended solids. Solids removal devices vary in regard to efficiency, solids retention time, effluent characteristics (both solid waste and treated water) and water consumption rate. Sand and gravel ...
... microns), while filtration devices (e.g., microscreen filters, bead filters) remove settleable and suspended solids. Solids removal devices vary in regard to efficiency, solids retention time, effluent characteristics (both solid waste and treated water) and water consumption rate. Sand and gravel ...
Nitrate Removal Options for Complete Nitrification
... uneaten food, dead organisms, and fish, plant, and invertebrate waste into ammonia. Aerobic bacteria, which need oxygen to survive, then break down ammonia into nitrite, and nitrite into nitrate. For most aquarists, nitrate is then removed from the system by frequent water changes. However, nature a ...
... uneaten food, dead organisms, and fish, plant, and invertebrate waste into ammonia. Aerobic bacteria, which need oxygen to survive, then break down ammonia into nitrite, and nitrite into nitrate. For most aquarists, nitrate is then removed from the system by frequent water changes. However, nature a ...
OCR Document
... – Water dissolves and carries elements down into geosphere and groundwater. – Important part of all geochemical cycles i.e. - important for transporting nutrient elements essential for life ...
... – Water dissolves and carries elements down into geosphere and groundwater. – Important part of all geochemical cycles i.e. - important for transporting nutrient elements essential for life ...
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.