Table 2.1 The problem-causing components of wastewater
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| Type of material in wastewater |
Comment |
Organic waste:
- human waste
- food waste
- industrial and commercial wastes
- animal effluent
|
- faeces, urine, blood
- an increasing volume of wastewater - possibly due to the advent
of kitchen waste macerators
- tradewaste - processing
- farming - not usually managed via community infrastructure
|
| Oils and fats |
- households – usually from tipping down drains
- tradewastes – garages, manufacturing
|
| Metals |
- households – found in foods – via human wastes
- aggressive water supplies (outside the limits pH6-8)
- tradewastes
|
| Solvents |
- households – tipping down drains, cleaning
- tradewastes – garages, manufacturing
|
| Chemicals |
- households – via human wastes
- households – via cleaners, soaps etc, washing, bathing and
cooking
- tradewastes
|
| Paints |
|
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