Document
... Activated sludge is a biochemical process for treating sewage and industrial wastewater that uses air (or oxygen) and microorganisms to biologically oxidize organic pollutants, producing a waste sludge (or floc) containing the oxidized material Atmospheric air or pure oxygen is bubbled through prima ...
... Activated sludge is a biochemical process for treating sewage and industrial wastewater that uses air (or oxygen) and microorganisms to biologically oxidize organic pollutants, producing a waste sludge (or floc) containing the oxidized material Atmospheric air or pure oxygen is bubbled through prima ...
BiologicalHW1
... Q1. An organic waste with 250 mg/L BOD5 (S0) needs to be treated using a completely-mixed activated sludge process. The effluent BOD is to <=10 mg/L (Seff). Assume that the temperature is 20°C, the flow rate is 5 million gallons/day and following information are available: (i) Influent volatile susp ...
... Q1. An organic waste with 250 mg/L BOD5 (S0) needs to be treated using a completely-mixed activated sludge process. The effluent BOD is to <=10 mg/L (Seff). Assume that the temperature is 20°C, the flow rate is 5 million gallons/day and following information are available: (i) Influent volatile susp ...
Wastewater Treatment Lab
... tour to answer the following questions using complete sentences. 1. Explain why it is important to remove nitrogen and phosphorus from raw sewage. Describe the relationship between these compounds and B.O.D.. Discuss where the nitrogen and phosphorus come from in Marin County. ...
... tour to answer the following questions using complete sentences. 1. Explain why it is important to remove nitrogen and phosphorus from raw sewage. Describe the relationship between these compounds and B.O.D.. Discuss where the nitrogen and phosphorus come from in Marin County. ...
ANSWER KEY Extra Credit Study Questions for Sewage Treatment
... Aerobic composting results in much faster decomposition than anaerobic composting. 12) What specific type of composting is used at the Hawk Ridge facility? In-vessel (bioreactor) aerobic composting 13) What are the five essential factors that are important to control in the production of compost? Mi ...
... Aerobic composting results in much faster decomposition than anaerobic composting. 12) What specific type of composting is used at the Hawk Ridge facility? In-vessel (bioreactor) aerobic composting 13) What are the five essential factors that are important to control in the production of compost? Mi ...
The processes used in modern sewage treatment plants
... and treat as many solids as possible before returning the water to the environment. Here are the most common techniques: Primary Screening. Screens remove the largest items in sewage. They generally consist of large bars situated at 1 to 6 inches apart to catch such items as boards, rags, large plas ...
... and treat as many solids as possible before returning the water to the environment. Here are the most common techniques: Primary Screening. Screens remove the largest items in sewage. They generally consist of large bars situated at 1 to 6 inches apart to catch such items as boards, rags, large plas ...
Environmental Technology 1
... If residence time is excessive (> 2hr) the risk in secondary clarifier is that denitrification takes place, generating N2 microbubbles which can float sludge flocs. What we obviously want to avoid is sludge loss into the receiving water body we actually wanted to protect in the first place. On site ...
... If residence time is excessive (> 2hr) the risk in secondary clarifier is that denitrification takes place, generating N2 microbubbles which can float sludge flocs. What we obviously want to avoid is sludge loss into the receiving water body we actually wanted to protect in the first place. On site ...
No Slide Title
... •Primary 1: settling tank- (removes grit), 2: clarifier- (lets sludge settle while oil is removed by use of a skimmer) •Secondary - 1: aeration tank -(colloids & organics removed by hungry bacteria -aeration increases bacterial growth - substance produced called activated sludge), 2: clarifier- (let ...
... •Primary 1: settling tank- (removes grit), 2: clarifier- (lets sludge settle while oil is removed by use of a skimmer) •Secondary - 1: aeration tank -(colloids & organics removed by hungry bacteria -aeration increases bacterial growth - substance produced called activated sludge), 2: clarifier- (let ...
2004 TAIWAN INTERNATIONAL SCIENCE FAIR
... This project is a research to find out if prawn pond sludge can be used as a fertilizer . This because so far there is no beneficial use of these prawn pond sludge from over 154,000 hectares of water pond culture in Sarawak . The objectives of this project were to determine if this sludge can be com ...
... This project is a research to find out if prawn pond sludge can be used as a fertilizer . This because so far there is no beneficial use of these prawn pond sludge from over 154,000 hectares of water pond culture in Sarawak . The objectives of this project were to determine if this sludge can be com ...
Welcome to Shawnee #2 Wastewater Treatment Plant
... The Generator supplies emergency power to maintain treatment. ...
... The Generator supplies emergency power to maintain treatment. ...
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.