ENVR07045 2013 Wastewater Management

General Details

Full Title
Wastewater Management
Transcript Title
Wastewater Management
Code
ENVR07045
Attendance
N/A %
Subject Area
ENVR - Environmental Science
Department
ESCI - Environmental Science
Level
07 - NFQ Level 7
Credit
05 - 05 Credits
Duration
Semester
Fee
Start Term
2013 - Full Academic Year 2013-14
End Term
9999 - The End of Time
Author(s)
Billy Fitzgerald, Frances Lucy
Description

This module covers the characteristics of wastewaters and the design and processes involved in industrial and municipal wastewater treatment systems. Common operational issues will be reviewed and the fate of resulting end-products will be examined in the context of relevant legislation.

Learning Outcomes

On completion of this module the learner will/should be able to;

1.

Identify the sources of waste water and characterise waste streams in terms of their pollution potential and the most suitable methods of treatment

2.

Recommend techniques for the reduction of waste water in terms of strength and volume

3.

Outline the design and operation of the various stages involved in the treatment of waste waters

4.

Interpret results from the monitoring of the operational stages of a waste water treatment plant and recommend corrective action to remedy operational problems

5.

Explain the biological and chemical methods for the transformation and removal of nitrogen and phosphorus compounds in waste waters

6.

Explain how sludge is treated and disposed of in terms of best practice

Indicative Syllabus

Characterisation of municipal wastewater: BOD, COD, SS, organic N, TKN, NH3, total P, ortho P

Biodegradation processes for organic matter.  Waste water flows and calculation of population equivalent.  BOD of common waste streams

Design of wastewater treatment plants

Preliminary, primary and secondary treatment processes

  • Preliminary treatment:      screens, grit traps - equipment design and function.
  • Primary treatment: tank      design, calculation for hydraulic retention times, BOD/SS removal rates,      sludge characteristics, production rate and treatment.
  • Secondary treatment:      activated sludge tank design, aerator types and oxygenation capacity,      clarifier design, return and waste activated sludge systems, final      effluent discharge.
  • On-site treatment systems      for unsewered developments including single houses

Transformation of nitrogen and phosphorus compounds, microbial process and factors affecting nitrification and denitrification including tank design and sequence, phosporus removal methods.

Industrial wastewater processes: general characteristics of industrial waste water, balancing tanks design and function, loading and mass balance.

Biofiltration: general characteristics, design of percolating filter, biotower and trickling filter, loading Vs. BOD removal rates, sloughing, ponding, nitrification, pretreatment by DAF and Imhoff tank.

Operational issues - bulking (identification and remedies), denitrification, toxic effects, factors affecting treatment efficiency, calculation of removal rates

Assessment of effectiveness of treatment throughout process stages

 Treatment of sludge and sludge disposal options

  • Stabilisation by aerobic,      anaerobic (including CHP) and chemical means. Thickening - function, tank      design.  Conditioning - system design, polyelectrolyte.
  • Dewatering: drying beds,      belt press, filter press, centrifuges

Legislation: EU Urban Wastewater Directive and the Waste Management (Use of Sewage Sludge in Agriculture) Regulations

Techniques for the prevention and minimisation of water use and for the reuse/recycling of wastewaters in industrial situations

 

 

Coursework & Assessment Breakdown

Coursework & Continuous Assessment
50 %
End of Semester / Year Formal Exam
50 %

Coursework Assessment

Title Type Form Percent Week Learning Outcomes Assessed
1 Multiple Choice Two MCQ Tests Continuous Assessment UNKNOWN 20 % OnGoing 1,2,3,4,5,6
2 Assignment Two Wastewater Treatment Plant Flow Diagrams Continuous Assessment UNKNOWN 20 % OnGoing 3
3 Assignment Wastewater Calculations Continuous Assessment UNKNOWN 10 % Week 14 2,4

End of Semester / Year Assessment

Title Type Form Percent Week Learning Outcomes Assessed
1 Final Exam Exam Final Exam UNKNOWN 50 % End of Term 1,2,3,4,5,6
             
             

Part Time Mode Workload


Type Location Description Hours Frequency Avg Workload
Directed Learning Online On-line activities, assignments, directed learning 4 Weekly 4.00
Workshop Offsite Site visits and lectures 5 UNKNOWN 5.00
Independent Learning UNKNOWN Researching, reading and reflecting 40 UNKNOWN 40.00
Total Part Time Average Weekly Learner Contact Time 9.00 Hours

Module Resources

Non ISBN Literary Resources

Environmental Protection Agency (1998) Wastewater Treatment Manuals - Characterisation of Industrial Wastewaters

 Environmental Protection Agency (1995) Wastewater Treatment Manuals - Preliminary Treatment

 Environmental Protection Agency (1997) Wastewater Treatment Manuals - Primary, Secondary & Tertiary Treatment

 Environmental Protection Agency (1999) Wastewater Treatment Manuals - Treatment Systems for Small Communities, Business, Leisure Centres and Hotels

 Environmental Protection Agency (2000) Wastewater Treatment System for Single Houses

 Environmental Protection Agency (2007) Code of Practice: Wastewater Treatment System for Single Houses (P.E.

 Environmental Protection Agency (1996) A Handbook on Implementation for Sanitary Authorities

Gray, N. F. (2005) Water Technology, An introduction for environmental scientists and engineers. Elsevier (Butterworth-Heinemann)    ISBN: 07506 6633 1

Gray, N. F. (2005)  Biology of Wastewater Treatment. Imperial College Press, London. ISBN 1-86094-328-4 (hbk) 1-86094-322-2 (pbk)  

Other Resources

Broadband

Additional Information

None