26 Wastewater Treatment BOD

26 Wastewater Treatment BOD - Wastewater Treatment (Fecal...

Info iconThis preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Wastewater Treatment (Fecal Matters) Major Determinants of Water Quality and the Impact or Availability of Water Pollutants Organisms Solubility Oxygen pH All are Involved in Wastewater Treatment Wastewater Treatment Plant Effluent Wastewater Sources Residential blackwater and grey water Nonresidential toilets Sinks, showers, laundry Offices Businesses Restaurants Schools Hospitals Hotels Laundries Farms Industry Storm water Wastewater Constituents Pathogenic organisms: bacteria, protozoa, viruses Non-pathogenic bacteria (> 100,000 / ml for sewage) Organic (carbon) particles: feces, food, plant material, humus Soluble Organic Chemicals pesticides, poisons, paints, drugs Inorganic particles: sand, silts, clays, metal particles Soluble Inorganic Chemicals : nutrients (N and P), metals (Pb 2+ ) Organic and inorganic particles Higher turbidity levels are often associated with higher levels of viruses, parasites and bacteria. Turbidity Organisms Pesticides Treatment Primary – physical removal of materials/particles Secondary – biological degradation of organics Tertiary – advanced purification/disinfection Three phases organics Primary Treatment Removal of objects, large and small particles Primary Treatment Screening: removal of large objects Bar Screen Grit Chamber Large particulates Short time period Sand and gravel esp. from storm water Primary Treatment Primary Settling Tank Longer residence time Use Chemicals to promote flocculation Smaller Particles Suspended solids Solids settle to the tank bottom as “primary sludge” Some remains as suspended solids Primary Treatment Al 3+ Al 3+ Al 3+ Al 3+ Al 3+ Al 3+ Chemical Flocculation Suspended silts, clays and organic matter are Generally small and negatively charged. Bar Screen Primary Settling Grit Chamber Large Particles Small Particles Chemicals (e.g. Al 3+ ) Primary Treatment Secondary Treatment...
View Full Document

This note was uploaded on 02/24/2011 for the course SWS 2007 taught by Professor bonczek during the Fall '09 term at University of Florida.

Page1 / 38

26 Wastewater Treatment BOD - Wastewater Treatment (Fecal...

This preview shows document pages 1 - 13. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online