Isolation of Thiobacillus sp from aerobic sludge of distillery and dairy
... Sulfide oxidation by IICT-SOB-DAIRY-201 at different initial sulfide concentration: Fig. 1 shows the oxidation of sulfide and sulfate formation with time by IICT-SOB-DAIRY-201 at two different initial sulfide concentrations in a batch reactor. From the Fig. it is evident that, at both initial sulfid ...
... Sulfide oxidation by IICT-SOB-DAIRY-201 at different initial sulfide concentration: Fig. 1 shows the oxidation of sulfide and sulfate formation with time by IICT-SOB-DAIRY-201 at two different initial sulfide concentrations in a batch reactor. From the Fig. it is evident that, at both initial sulfid ...
Exploris SectionI
... Several physical, chemical and biological wastewater properties can adversely affect the environment or be harmful to humans. Those of primary concern include biodegradable organic material, suspended solids, pathogens, and nutrients such as nitrogen and phosphorus. The Living Machine treatment proc ...
... Several physical, chemical and biological wastewater properties can adversely affect the environment or be harmful to humans. Those of primary concern include biodegradable organic material, suspended solids, pathogens, and nutrients such as nitrogen and phosphorus. The Living Machine treatment proc ...
Full Text
... Chemical Characteristics of E. cottonii: The water content of E. cottonii was 16.3±12:23%. A high water content of the substrate enhances the growth of microorganisms under degradation [20]. The ash content was 14.39±0.035% (Table 1). According to Matanjun et al. [21] this species has a fairly high ...
... Chemical Characteristics of E. cottonii: The water content of E. cottonii was 16.3±12:23%. A high water content of the substrate enhances the growth of microorganisms under degradation [20]. The ash content was 14.39±0.035% (Table 1). According to Matanjun et al. [21] this species has a fairly high ...
Biological Denitrification Using Upflow Biofiltration In Recirculating
... acetate alone (7). Fish waste and uneaten feed constitute a source of organic matter produced within the fish culture unit that can be used to generate a suitable carbon source for the denitrification process (1, 10). Since this organic matter is in the particulate form and not readily available for ...
... acetate alone (7). Fish waste and uneaten feed constitute a source of organic matter produced within the fish culture unit that can be used to generate a suitable carbon source for the denitrification process (1, 10). Since this organic matter is in the particulate form and not readily available for ...
Analysis of Free Ammonia Inhibition of Nitrite Oxidizing Bacteria
... nitrite oxidation at higher temperature4) and/or at lower dissolved oxygen concentration.6) A respirometric method based on nitrogeneous oxygen uptake rate was developed to calculate the rates of ammonia oxidation and nitrite oxidation separately using combined measurements from dissolved oxygen(DO) ...
... nitrite oxidation at higher temperature4) and/or at lower dissolved oxygen concentration.6) A respirometric method based on nitrogeneous oxygen uptake rate was developed to calculate the rates of ammonia oxidation and nitrite oxidation separately using combined measurements from dissolved oxygen(DO) ...
Chapter 5
... nitrate. Nitrification can be achieved in any aerobic biological process at low organic loadings and where suitable environmental conditions are provided. Nitrifying bacteria are slower growing than the heterotrophic bacteria, which comprises the greater proportions of the biomass in both fixed film ...
... nitrate. Nitrification can be achieved in any aerobic biological process at low organic loadings and where suitable environmental conditions are provided. Nitrifying bacteria are slower growing than the heterotrophic bacteria, which comprises the greater proportions of the biomass in both fixed film ...
Applying oxidation reduction potential sensors in biological
... The second location for and ORP sensor would be in the initial anaerobic zone, also known as a fermentation zone. This basin requires a strongly negative ORP in order to break down the polyphosphates as mentioned earlier. Look for ORP values less than -150 mV to ensure adequate electron donors for t ...
... The second location for and ORP sensor would be in the initial anaerobic zone, also known as a fermentation zone. This basin requires a strongly negative ORP in order to break down the polyphosphates as mentioned earlier. Look for ORP values less than -150 mV to ensure adequate electron donors for t ...
Removal of Ammonia and Phenol from Industrial Waste Water
... carbon source but may suffer in the competition for food in highly aerobic environment. Because of their high surface area/volume ratio, the filamentous organisms may survive better under low oxygen tensions than other flocculated aerobic growth. Failure to maintain oxygen in the aeration system can ...
... carbon source but may suffer in the competition for food in highly aerobic environment. Because of their high surface area/volume ratio, the filamentous organisms may survive better under low oxygen tensions than other flocculated aerobic growth. Failure to maintain oxygen in the aeration system can ...
the use of magnesium hydroxide slurry
... ammonia removal. Due to low influent alkalinity, alkali addition was necessary for the nitrification process and for pH adjustment. Before switching to Martin Marietta’s Magnesium Hydroxide Slurry, the municipality utilized slaked lime and eventually caustic soda for supplemental alkalinity in the n ...
... ammonia removal. Due to low influent alkalinity, alkali addition was necessary for the nitrification process and for pH adjustment. Before switching to Martin Marietta’s Magnesium Hydroxide Slurry, the municipality utilized slaked lime and eventually caustic soda for supplemental alkalinity in the n ...
All `Bout Composting
... air. Oxygen creates the high temperatures that kill bacteria. You can add air by elevating the compost – placing the pile on loosely spaced boards, so air can be drawn in from the bottom. Add Water – compost should be moist to the touch, like a wrung out sponge, not soggy. If too wet, turn pile over ...
... air. Oxygen creates the high temperatures that kill bacteria. You can add air by elevating the compost – placing the pile on loosely spaced boards, so air can be drawn in from the bottom. Add Water – compost should be moist to the touch, like a wrung out sponge, not soggy. If too wet, turn pile over ...
Assignment MSWord - Technical Learning College
... of the wastewater treatment system, nutrients and nutrient removal, filtration, microbes, bugs and the activated sludge process. You will have 90 days in order to successfully complete this assignment with a score of 70% or better. If you need any assistance, please contact TLC’s Student Services. O ...
... of the wastewater treatment system, nutrients and nutrient removal, filtration, microbes, bugs and the activated sludge process. You will have 90 days in order to successfully complete this assignment with a score of 70% or better. If you need any assistance, please contact TLC’s Student Services. O ...
Recognition of protozoa and metazoa using
... species as two different classes and a second analysis containing 9 classes with the two species represented in a single class. The two values in the Epistylis column in Tables 2 and 3 are reported to the cases where the two Epistylis species were analyzed as a single class or two different classes, ...
... species as two different classes and a second analysis containing 9 classes with the two species represented in a single class. The two values in the Epistylis column in Tables 2 and 3 are reported to the cases where the two Epistylis species were analyzed as a single class or two different classes, ...
CHAPTER 6
... significantly due to the carbon dioxide produced. If the natural alkalinity in the wastewater is sufficient to leave enough alkalinity after the nitrification process, the pH reduction might not be significant. If however, there is insufficient natural alkalinity to withstand the nitrification, the ...
... significantly due to the carbon dioxide produced. If the natural alkalinity in the wastewater is sufficient to leave enough alkalinity after the nitrification process, the pH reduction might not be significant. If however, there is insufficient natural alkalinity to withstand the nitrification, the ...
Phosphorus Removal Guide for Wastewater Operators
... For bio-P bugs (aka PAOs, phosphate accumulating organisms) to remove phosphorus, they must first take in VFAs. This has to occur in a zero oxygen environment, but not necessarily the same place that VFAs are formed. The wastewater needs to contain approximately 25 times as much BOD as phosphorus i ...
... For bio-P bugs (aka PAOs, phosphate accumulating organisms) to remove phosphorus, they must first take in VFAs. This has to occur in a zero oxygen environment, but not necessarily the same place that VFAs are formed. The wastewater needs to contain approximately 25 times as much BOD as phosphorus i ...
John Ellison - Pirana System
... problem in the industry is that BOD is equated with undigested organic material that presents a threat to soil percolation. When such ATUs are used in new systems, the most common application, they are assumed to allow for a longer period in which the soils can accept such waste. This model is funda ...
... problem in the industry is that BOD is equated with undigested organic material that presents a threat to soil percolation. When such ATUs are used in new systems, the most common application, they are assumed to allow for a longer period in which the soils can accept such waste. This model is funda ...
Bovine Rectal Bacteria Can Solve COD Problems with Acetate Liquor
... transferred to SO42- (320mg/l) (although NO3-N was not measured). Thus sulfate reduction occurred as SO4 2was induced and under the circumstances, the reducing equivalents did not possibly flow towards O2 because the dissolved oxygen concentrations were very low (0.35mg/L), following which, COD decr ...
... transferred to SO42- (320mg/l) (although NO3-N was not measured). Thus sulfate reduction occurred as SO4 2was induced and under the circumstances, the reducing equivalents did not possibly flow towards O2 because the dissolved oxygen concentrations were very low (0.35mg/L), following which, COD decr ...
Biosolids Recycling Facts
... into thousands of dollars per year depending on the amount of land utilized. This support of local farmers allows them to produce crops more affordably, which keep the prices at the grocery store down. Rich in plant nutrients, most recycled biosolids arc land applied on farms ...
... into thousands of dollars per year depending on the amount of land utilized. This support of local farmers allows them to produce crops more affordably, which keep the prices at the grocery store down. Rich in plant nutrients, most recycled biosolids arc land applied on farms ...
Controlling the acid capacity on wastewater treatment plants
... Effects of acid capacity deficits in the treatment process Effect on nitrification During nitrification, nitric acid is formed, which should be absorbed immediately after formation by the buffer system within the wastewater. In unfavorable nitrogen/acid capacity ratios the pH can drop to values <4 ...
... Effects of acid capacity deficits in the treatment process Effect on nitrification During nitrification, nitric acid is formed, which should be absorbed immediately after formation by the buffer system within the wastewater. In unfavorable nitrogen/acid capacity ratios the pH can drop to values <4 ...
2.3 Anaerobic, aerobic and facultative ponds
... the organic matter into carbon dioxide, water and cell biomass. Passive or naturally aerated ponds rely on oxygen produced by phytoplankton during photosynthesis and, to a lesser extent, diffusion of oxygen from the air into surface layers (Shilton 2005). Microorganism growth is rapid, and a large p ...
... the organic matter into carbon dioxide, water and cell biomass. Passive or naturally aerated ponds rely on oxygen produced by phytoplankton during photosynthesis and, to a lesser extent, diffusion of oxygen from the air into surface layers (Shilton 2005). Microorganism growth is rapid, and a large p ...
Effect of External Carbon Source and Bed Turnover Rate on
... mg/L in order to find the optimized condition for denitrification. At the beginning of the period, the methanol was injected automatically according to the influent flow and the concentration of NO3-N and DO to grow denitrifying bacteria. DO was controlled under 1 ~ 2 mg/L for efficient denitrificat ...
... mg/L in order to find the optimized condition for denitrification. At the beginning of the period, the methanol was injected automatically according to the influent flow and the concentration of NO3-N and DO to grow denitrifying bacteria. DO was controlled under 1 ~ 2 mg/L for efficient denitrificat ...
CHAPTER ONE INTRODUCTION 1.1 Heavy metals pollution in
... can disturb natural processes on land and in the water. Heavy metals contain in the wastes from the illegal dumping activities can leach to the environment and not only pollute the environment but also can cause serious health hazards. Heavy metals tend to bioaccumulate in plants and animals, biocon ...
... can disturb natural processes on land and in the water. Heavy metals contain in the wastes from the illegal dumping activities can leach to the environment and not only pollute the environment but also can cause serious health hazards. Heavy metals tend to bioaccumulate in plants and animals, biocon ...
caustic magnesia in environmental applications
... values of pH. The use of alkalis like Ca(OH)2 or NaOH is not indicative because the pH may reach values of 12 and 14 correspondingly. Addition of MgO or Mg(OH)2 can also be made for the treatment of contaminated soils. In this case, after the soil has been removed (digging) it is mixed with the adeq ...
... values of pH. The use of alkalis like Ca(OH)2 or NaOH is not indicative because the pH may reach values of 12 and 14 correspondingly. Addition of MgO or Mg(OH)2 can also be made for the treatment of contaminated soils. In this case, after the soil has been removed (digging) it is mixed with the adeq ...
Nitrogen Removal Guide for Wastewater Operators
... These bacteria, known as “nitrifiers,” are strict “aerobes;” meaning, they must have free dissolved oxygen to perform their work. Nitrification occurs only under aerobic conditions with a sufficiently positive oxidation reduction potential (ORP). Nitrification requires a long retention time, a low f ...
... These bacteria, known as “nitrifiers,” are strict “aerobes;” meaning, they must have free dissolved oxygen to perform their work. Nitrification occurs only under aerobic conditions with a sufficiently positive oxidation reduction potential (ORP). Nitrification requires a long retention time, a low f ...
Review of the Advantages and Disadvantages of
... Anaerobic digestion is a process by which environmentally hazardous organic wastes from municipal, agricultural and industrial sources may be stabilised. The treatment has many side benefits, most notably the production of methane-rich biogas which can be used to generate electricity and heat. Anaer ...
... Anaerobic digestion is a process by which environmentally hazardous organic wastes from municipal, agricultural and industrial sources may be stabilised. The treatment has many side benefits, most notably the production of methane-rich biogas which can be used to generate electricity and heat. Anaer ...
GE`s ABMet removes selenium at AEP
... Prior to treatment in the ABMet biofilters, up to 350 gpm of the plant’s FGD blowdown is treated in a series of physical/chemical and liquid/solids separation steps in the FGD-WWTP. In addition, up to 250 gpm of landfill leachate from a holding pond can be blended into the FGD WWTP. The combined str ...
... Prior to treatment in the ABMet biofilters, up to 350 gpm of the plant’s FGD blowdown is treated in a series of physical/chemical and liquid/solids separation steps in the FGD-WWTP. In addition, up to 250 gpm of landfill leachate from a holding pond can be blended into the FGD WWTP. The combined str ...
Sewage sludge treatment
Sewage sludge treatment describes the processes used to manage and dispose of sewage sludge produced during sewage treatment. Sludge is mostly water with lesser amounts of solid material removed from liquid sewage. Primary sludge includes settleable solids removed during primary treatment in primary clarifiers. Secondary sludge separated in secondary clarifiers includes treated sewage sludge from secondary treatment bioreactors. Sludge treatment is focused on reducing sludge weight and volume to reduce disposal costs, and on reducing potential health risks of disposal options. Water removal is the primary means of weight and volume reduction, while pathogen destruction is frequently accomplished through heating during thermophilic digestion, composting, or incineration. The choice of a sludge treatment method depends on the volume of sludge generated, and comparison of treatment costs required for available disposal options. Air-drying and composting may be attractive to rural communities, while limited land availability may make aerobic digestion and mechanical dewatering preferable for cities, and economies of scale may encourage energy recovery alternatives in metropolitan areas.Energy may be recovered from sludge through methane gas production during anaerobic digestion or through incineration of dried sludge, but energy yield is often insufficient to evaporate sludge water content or to power blowers, pumps, or centrifuges required for dewatering. Coarse primary solids and secondary sewage sludge may include toxic chemicals removed from liquid sewage by sorption onto solid particles in clarifier sludge. Reducing sludge volume may increase the concentration of some of these toxic chemicals in the sludge.