CHAPTER ONE INTRODUCTION 1.1 Heavy metals pollution in
... and others (Nair et al., 2008; Yahya, 2008). The most common toxic heavy metals found in industrial wastes include copper (Cu), lead (Pb), zinc (Zn), cadmium (Cd), chromium (Cr), iron (Fe) and manganese (Mn). Sludge generated during various industrial processes has been found to contain undesirable ...
... and others (Nair et al., 2008; Yahya, 2008). The most common toxic heavy metals found in industrial wastes include copper (Cu), lead (Pb), zinc (Zn), cadmium (Cd), chromium (Cr), iron (Fe) and manganese (Mn). Sludge generated during various industrial processes has been found to contain undesirable ...
Assignment MSWord - Technical Learning College
... B. Acid formers E. Anaerobic methane formation C. Methane bacteria F. None of the Above 2. Note that the products of the _______________ (principally acetic acid) become the substrate for the methane producers. A. An anaerobic fermenter D. General anaerobic degraders B. Acid formers E. Anaerobic met ...
... B. Acid formers E. Anaerobic methane formation C. Methane bacteria F. None of the Above 2. Note that the products of the _______________ (principally acetic acid) become the substrate for the methane producers. A. An anaerobic fermenter D. General anaerobic degraders B. Acid formers E. Anaerobic met ...
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 ...
Methanol removal from methanol-water mixture using
... Methanol in drinking water supplies can be remedied effectively through biological treatment. The type of technology used depends on the anticipated influent concentrations. For influent methanol levels of 1 ppm, a slow sand filter provides the required microbial activity for successful treatment fo ...
... Methanol in drinking water supplies can be remedied effectively through biological treatment. The type of technology used depends on the anticipated influent concentrations. For influent methanol levels of 1 ppm, a slow sand filter provides the required microbial activity for successful treatment fo ...
Analysis of Free Ammonia Inhibition of Nitrite Oxidizing Bacteria
... Free ammonia (NH3-N) inhibition of nitrite-oxidizing bacteria (NOB) has been widely studied for partial nitrification (or nitrite accumulation) and denitrification via nitrite (NO2 -N) as a low-cost treatment of ammonium containing wastewater. The literature on NH3-N inhibition of NOB, however, show ...
... Free ammonia (NH3-N) inhibition of nitrite-oxidizing bacteria (NOB) has been widely studied for partial nitrification (or nitrite accumulation) and denitrification via nitrite (NO2 -N) as a low-cost treatment of ammonium containing wastewater. The literature on NH3-N inhibition of NOB, however, show ...
Full-Text PDF
... One of the most important environmental problems today is the discharge of wastewater from urban and industrial sources, since human activities have greatly accelerated and extended the natural cycles of nitrogen in the soil, water and atmosphere. In this way, different technologies have been used f ...
... One of the most important environmental problems today is the discharge of wastewater from urban and industrial sources, since human activities have greatly accelerated and extended the natural cycles of nitrogen in the soil, water and atmosphere. In this way, different technologies have been used f ...
Chapter 5
... process in wastewater treatment. Ammonia can be quite harmful if discharged. Examples of the impacts of ammonia in a receiving stream include, (i) creates dissolved oxygen sag in receiving stream, (ii) toxic to fish and other aquatic life and (iii) nutrient input ( when oxidized) ...
... process in wastewater treatment. Ammonia can be quite harmful if discharged. Examples of the impacts of ammonia in a receiving stream include, (i) creates dissolved oxygen sag in receiving stream, (ii) toxic to fish and other aquatic life and (iii) nutrient input ( when oxidized) ...
... phosphorus, nitrogen, and humic substances. Sewage sludge contains essential plant nutrients, primarily nitrogen and phosphorus. Depending on treatment method; sludge also contains approximately 30% organic matter. The organic matter in sludge is a key component to its success as an organic amendmen ...
Extract from EPA Batneec Guidance Note For The Extraction of
... obviously does so in the absence of site-specific information. Accordingly, it represents the requirements expected of any new activity covered by the Note, but does not exclude additional requirements which may form part of the granting of a licence for a specific site. The approach to be used in s ...
... obviously does so in the absence of site-specific information. Accordingly, it represents the requirements expected of any new activity covered by the Note, but does not exclude additional requirements which may form part of the granting of a licence for a specific site. The approach to be used in s ...
Geotube® Dewatering Technology
... a distribution box and an absorption field or an equivalent process for effluent treatment. The main function of the septic tank is to remove large particles and grease, which would otherwise clog the effluent treatment process. Heavy solids settle to the bottom as a sludge layer and undergo biologi ...
... a distribution box and an absorption field or an equivalent process for effluent treatment. The main function of the septic tank is to remove large particles and grease, which would otherwise clog the effluent treatment process. Heavy solids settle to the bottom as a sludge layer and undergo biologi ...
Understanding Soil Phosphorus - Integrated Pest and Crop
... decomposition of the increased amount of organic matter can deplete the dissolved oxygen content of lakes resulting in the death of fish and other aquatic organisms. Additionally, certain blue-green algae in waters have been found to form potent toxins that can cause taste and odor problems, interfe ...
... decomposition of the increased amount of organic matter can deplete the dissolved oxygen content of lakes resulting in the death of fish and other aquatic organisms. Additionally, certain blue-green algae in waters have been found to form potent toxins that can cause taste and odor problems, interfe ...
Isolation of Thiobacillus sp from aerobic sludge of distillery and dairy
... oxygen demand (WHO, 1981; Nath et al., 2005; Singh, 2007). Sulfide emitted into the environment is of two forms, free sulfides in the form of H2S and dissolved sulfides in the form of HS- (Suzuki, 1974). Removal of sulfides from the industrial waste streams is presently being done by chemical method ...
... oxygen demand (WHO, 1981; Nath et al., 2005; Singh, 2007). Sulfide emitted into the environment is of two forms, free sulfides in the form of H2S and dissolved sulfides in the form of HS- (Suzuki, 1974). Removal of sulfides from the industrial waste streams is presently being done by chemical method ...
Phosphorus Removal Guide for Wastewater Operators
... solution so that the ortho-P concentration in the fermenter effluent is some three times what it was in the influent. Third, as the PAOs (we like the phrase bio-P bugs) flow into strongly aerobic conditions, they will concentrate phosphorus in their cells such that the phosphorus is pulled out of so ...
... solution so that the ortho-P concentration in the fermenter effluent is some three times what it was in the influent. Third, as the PAOs (we like the phrase bio-P bugs) flow into strongly aerobic conditions, they will concentrate phosphorus in their cells such that the phosphorus is pulled out of so ...
CHAPTER 6
... Plug Flow Conditions – The term “plug flow” is intended to mean maximizing detention time in the aeration zones by creating flow routes that utilize as much of the volume in aeration zones as practical. It is common to enhance plug flow conditions in many treatment systems by installing baffles or d ...
... Plug Flow Conditions – The term “plug flow” is intended to mean maximizing detention time in the aeration zones by creating flow routes that utilize as much of the volume in aeration zones as practical. It is common to enhance plug flow conditions in many treatment systems by installing baffles or d ...
Introduction to Waterborne Pathogens in - General Manual
... of the on-farm beneficial practices that help reduce waterborne pathogens at their source, thereby reducing the overall pathogen load and waterborne contamination within an agricultural watershed. Reducing the pathogen load and contamination in water should help reduce the risk of human and animal w ...
... of the on-farm beneficial practices that help reduce waterborne pathogens at their source, thereby reducing the overall pathogen load and waterborne contamination within an agricultural watershed. Reducing the pathogen load and contamination in water should help reduce the risk of human and animal w ...
Biogas – Green Energy Process, Design, Energy
... how quickly the process can proceed and how much material can be digested. The growth rate of the methanogens is only around one fifth of the acid-forming bacteria. As previously mentioned, the methanogens do not release much energy in the process (see figure 10). But due to the anoxic conditions, ...
... how quickly the process can proceed and how much material can be digested. The growth rate of the methanogens is only around one fifth of the acid-forming bacteria. As previously mentioned, the methanogens do not release much energy in the process (see figure 10). But due to the anoxic conditions, ...
wastewater treatment – new challenges
... screens, aerated grit chambers, and pre-sedimentation to which precipitation agents are added (often ferrous sulfate), followed by pre-denitrification and a polishing step with addition of a precipitation agent before a post-sedimentation basin or deep-bed filter. Two-stage precipitation is common p ...
... screens, aerated grit chambers, and pre-sedimentation to which precipitation agents are added (often ferrous sulfate), followed by pre-denitrification and a polishing step with addition of a precipitation agent before a post-sedimentation basin or deep-bed filter. Two-stage precipitation is common p ...
Recent developments in biological nutrient removal
... systems, then the maximum specific growth rate of nitrifiers at 20°C (μAm20) and temperature sensitivity coefficient (θμ) in the minimum sludge age for nitrification (Rsm) equation, Rsm=1/ {μAm20 (θμ)(T-20) − bA20(1.03)(T−20)}, that best fits the red line in Fig. 1 are μAm20 = 1.10 /d and θμ = 1.143 ...
... systems, then the maximum specific growth rate of nitrifiers at 20°C (μAm20) and temperature sensitivity coefficient (θμ) in the minimum sludge age for nitrification (Rsm) equation, Rsm=1/ {μAm20 (θμ)(T-20) − bA20(1.03)(T−20)}, that best fits the red line in Fig. 1 are μAm20 = 1.10 /d and θμ = 1.143 ...
Removal of Ammonia and Phenol from Industrial Waste Water
... Okun indicated that Spherotilus are aerobic and require oxygen and an available 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 f ...
... Okun indicated that Spherotilus are aerobic and require oxygen and an available 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 f ...
Selenate reduction by a Pseudomonas species: a new mode of
... oxides [for review of literature see 2-4]. No published reports exist, however, suggesting that any Correspondence to: Joan M. Macy, Department of Animal Science, University of California, Davis, CA 95616, U.S.A. ...
... oxides [for review of literature see 2-4]. No published reports exist, however, suggesting that any Correspondence to: Joan M. Macy, Department of Animal Science, University of California, Davis, CA 95616, U.S.A. ...
Treatment of communal sewage sludge: quantities, recent
... machine thickening is gaining more significance with e.g. non-stabilised sludge, that could rot during the storage. ...
... machine thickening is gaining more significance with e.g. non-stabilised sludge, that could rot during the storage. ...
Occurrence and removal of estrogens in Brazilian wastewater
... Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Rua do Contorno, S/N Campus do Pici, Bl. 713, CEP: 60455-900, Fortaleza, CE, Brazil Department Sanitary and Environmental Engineering, State University of Paraíba, Rua Juvêncio Arruda, S/N, Campus Universitário, Bodo ...
... Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Rua do Contorno, S/N Campus do Pici, Bl. 713, CEP: 60455-900, Fortaleza, CE, Brazil Department Sanitary and Environmental Engineering, State University of Paraíba, Rua Juvêncio Arruda, S/N, Campus Universitário, Bodo ...
John Ellison - Pirana System
... effectiveness of ATU treatment are very low BOD and TSS readings. The 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 long ...
... effectiveness of ATU treatment are very low BOD and TSS readings. The 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 long ...
Nitrogen Removal Guide for Wastewater Operators
... alkalinity / pH. Every mg/L of ammonia converted to nitrate consumes 7.1 mg/L of alkalinity. The least expensive way of adding alkalinity is to create it during denitrification. Denitrification adds back about 50% of the alkalinity removed during nitrification. In instances where the conditions are ...
... alkalinity / pH. Every mg/L of ammonia converted to nitrate consumes 7.1 mg/L of alkalinity. The least expensive way of adding alkalinity is to create it during denitrification. Denitrification adds back about 50% of the alkalinity removed during nitrification. In instances where the conditions are ...