TABLE OF CONTENT
CONTENTS PAGE
Title Page – – – – – – – – i
Certification – – – – – – – ii
Dedication – – – – – – – – iii
Acknowledgements – – – – – – iv
Table of Contents – – – – – – – vi
CHAPTER ONE
- INTRODUCTION – – – – – 1
CHAPTER TWO
- Heavy Metals
- Types of Heavy Metals
- Arsenic
- Lead
- Mercury
- Cadmium
- Nickel
- Types of Heavy Metals
CHAPTER THREE
- ORIGIN OF METALS
- Environmental effect of metals
- Effect on Aquatic Environment
- Effect on Human Health
- Environmental effect of metals
CHAPTER FOUR
- SUMMARY, CONCLUSION AND REFERENCES
- Summary and Conclusion
References
CHAPTER ONE
1.0 INTRODUCTION Composting can be defined as the process in which of organic waste treatment by aerobic microorganisms, as such, it comprises three major phases: mesophilic and thermophilic stages and cooling (the compost stabilization stage) (Neklyudovet al., 2008). It can reduce the solid waste volume by 40-50% (Zorpaset al., 2002), pathogens are destroy by the metabolic heat generated by the thermophilic phase, degrade a big number of hazardous organic pollutants and make available a final product that can be used as a soil improvement or fertilizer (Caiet al., 2007).