Anaerobic Pond Design for Kombolcha Tannery

Table of Contents

Acknowledgement

Table of Contents

List of Acronyms

Abstract

1. Introduction
1.1 Background
1.2 Objectives
1.2.1 General Objectives
1.2.2 Specific Objectives

2. Waste in Leather Industry
2.1 Solid Waste
2.2 Effluents
2.3 Harmful Effects of Pollutant Present in Tannery Waste
2.3.1 Chromium
2.3.2 Sulfide
2.3.3 Organic
2.3.4 Suspended Mater
2.3.5 PH

3. Tanning of Leather
3.1 Origin and Properties of Tanning Material
3.1.1Trimming
3.1.2Washing and Soaking
3.1.3 Liming
3.1.4 Fleshing
3.1.5 Deliming and Bating
3.1.6 Pickling
3.1.7 Chrome Tanning

4. Waste Stabilization Ponds
4.1 Application of Waste Stabilization Pond Systems
4.2 Types of waste stabilization pond
4.2.1 Aerobic Ponds
4.2.2 Facultative Pond
4.2.3 Maturation ponds

5. Anaerobic Ponds
5.1 Description of Anaerobic Pond
5.2Treatment Mechanisms
5.3 Advantages and Disadvantages of Anaerobic Ponds
5.3.1 Advantages
5.3.2 Disadvantages

6. General Material Balance
6.1 Summary of the Material Balance

7. Pond Design
7.1 Flow Chart for the Treatment of Tanning Waste Water
7.2 Screen Design
7.3 Anaerobic Pond Design
7.4 Facultative Pond
7.5 Maturation Pond
7.6 Detail Design of Anaerobic Pond
7.7 Inlet outlet structure of anaerobic pond

8. Pond Layout
8.1 Pond Geometry
8.2 Inlet and Outlet Structure
8.3 Inlet Outlet Structure of Anaerobic Pond

9. Chrome Removal in Anaerobic Pond
9.1 Site Selection

10. Cost Analysis

11. Conclusion and Recommendation
11.1 Conclusion
11.2 Recommendation

References

Appendices

Appendix A: Percentage of effluents obtained in various processes (Calculated on total waste water in normal working method) (Pocket Book for the Leather Technologist, 1997)