Nitrogen mass balance in a constructed wetland treating piggery
... wastewaters were either returned to and used in agricultural lands or directly discharged to the rivers (MOA and MOE, 2004). These wastewaters still contain high levels of contaminants subsequent to treatment and therefore when introduced to agricultural lands or rivers might result to soil polluta ...
... wastewaters were either returned to and used in agricultural lands or directly discharged to the rivers (MOA and MOE, 2004). These wastewaters still contain high levels of contaminants subsequent to treatment and therefore when introduced to agricultural lands or rivers might result to soil polluta ...
Bioremediation
... the microorganisms -- which are already present in the soil -- in contact with the contaminants in the soil. Nutrients and oxygen are added, and conditions in the bioreactor are controlled to create the optimum environment for the microorganisms to degrade the contaminants. ...
... the microorganisms -- which are already present in the soil -- in contact with the contaminants in the soil. Nutrients and oxygen are added, and conditions in the bioreactor are controlled to create the optimum environment for the microorganisms to degrade the contaminants. ...
Lab 10. Reduction of Microbes by Physical
... After 20 minutes, take samples of the each supernatant from just below the water level. Dilute 10- and 100-fold (0.2 ml into 1.8 ml diluent) and spot plate 10 µl of the 10- and 100-fold dilutions in triplicate onto MacConkey and spot plate agars. Take an additional supernatant sample from each beake ...
... After 20 minutes, take samples of the each supernatant from just below the water level. Dilute 10- and 100-fold (0.2 ml into 1.8 ml diluent) and spot plate 10 µl of the 10- and 100-fold dilutions in triplicate onto MacConkey and spot plate agars. Take an additional supernatant sample from each beake ...
10.A. CONSTRUCTED WETLANDS: HOW TO COMBINE SEWAGE TREATMENT WITH PHYTOTECHNOLOGY
... 2. The ability of ecotones to reduce nutrient concentrations in water changes seasonally, and depends on species composition, species phenology, growth rate, etc. Nutrients that were accumulated during the growing season are released at its end due to an increase in litter production and decompositi ...
... 2. The ability of ecotones to reduce nutrient concentrations in water changes seasonally, and depends on species composition, species phenology, growth rate, etc. Nutrients that were accumulated during the growing season are released at its end due to an increase in litter production and decompositi ...
Metal Retention Mechanisms in Pilot
... Mining and metallurgical industries are critical to world’s economy; however, their socioenvironmental impacts are not negligible. Often, they have to deal with acid mine drainage (AMD), which is generated by sulfide oxidation in waste following the prolonged exposure to oxygen and water, if neutral ...
... Mining and metallurgical industries are critical to world’s economy; however, their socioenvironmental impacts are not negligible. Often, they have to deal with acid mine drainage (AMD), which is generated by sulfide oxidation in waste following the prolonged exposure to oxygen and water, if neutral ...
Calculation of Urban Domestic Pollutants and the Spatial
... Where, ki is the reuse water utilization rate of urban life, and other parameters are the same as Formula (3). In this paper, the pollutants such as COD, NH3-N, BOD5, TN and TP discharge have been calculated under the following conditions: (1) Supported that the sewage amounts of urban life did not ...
... Where, ki is the reuse water utilization rate of urban life, and other parameters are the same as Formula (3). In this paper, the pollutants such as COD, NH3-N, BOD5, TN and TP discharge have been calculated under the following conditions: (1) Supported that the sewage amounts of urban life did not ...
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.