Principles of water and wastewater treatment processes by Stuetz, Richard Stuetz, R. Stuetz

By Stuetz, Richard Stuetz, R. Stuetz

"Principles of Water and Wastewater therapy procedures outlines the primary unit operations which are excited about the separation, degradation and utilsation of natural and inorganic subject in the course of water and wastewater therapy. it really is designed for person, self-paced examine that describes the shape, functionality and alertness of unit operations for the remedy of water and wastewater. every one element of the text Read more...

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"Principles of Water and Wastewater therapy techniques" is the second one booklet within the "Water and Wastewater strategy applied sciences Series". The ebook outlines the main unit operations that are Read more...

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OPERATION CONTINUOUS/INTERMITTENT 8. NOTES Screenings often need dewatering 1. PROCESS: PRECIPITATION 2. WHAT DOES IT DO? Removes some soluble ions by addition of chemical – especially metals 3. FROM/TO Can reduce anions and cations from 100’s mg/l to c 10 mg/l 4. SERVICES REQUIRED Chemical supply tanks, power for mixing. Lime commonly used and presents handling problems 5. WASTE PRODUCED An inorganic sludge or slurry 6. COST LOW 7. OPERATION INTERMITTENT 8. NOTES Many different chemicals for different removal processes.

3). Chemical oxidation through ozonation will transform recalcitrant organic pollutants and activated carbon will adsorb others. 3, dissolved air floatation has been used to remove the larger particulates instead of coagulation-flocculation. In both flowsheets, chlorination is used to provide disinfection prior to putting into the public water supply network. Coagulant addition Raw water Sedimentation Flocculation Depth Chlorination filtration Potable supply Sludge Fig. 2 – Flowsheet for potable water treatment Air flotation Solids collection Transfer pump River Treatment/disposal Backwash water discharge Compressor Slurry pump Reactor Rapid gravity granular activated carbon filters Transfer pump Chlorine Backwash pump Dosing pump Ozone Distribution Disinfection contactor Distribution pumps Fig.

FROM/TO Bacterial counts from 100’s to near zero, organics from mg/l to ng/l levels 4. SERVICES REQUIRED Electricity if on-site ozone produced 5. WASTE PRODUCED Leaves some oxidised organic compounds in water 6. COST HIGH 7. OPERATION CONTINUOUS 8. NOTES Precautions in handling toxic 03 Principles of Water and Wastewater Treatment Processes Unit 2 Flowsheeting 1. PROCESS: CROSSFLOW MICROFILTRATION 2. WHAT DOES IT DO? Removes suspended solids and bacteria for particle sizes 5,1 mm 3. FROM/TO Almost complete removal or particulates in moderate to high concentrations 4.

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