Wastes | Refuse and Sewage
Wastes are unwanted material in our environment. Wastes are classified into:
i. Refuse or solid wastes.
ii. Sewage or wet wastes.
Refuse is household solid/dry waste which includes waste papers, plastic, plant remains, textile material metals, rubber, etc. Refuse can be classified into two namely:
1. Biodegradable Refuse: Which can be broken down or decay, for example, remains of plants and animals, yam peels, banana peels, etc They are organic in nature.
2. Non-biodegradable Refuse: Cannot be broken down or may take a very long time for it to be broken down, for example, tires, tire tubes, broken bottles, plastics, etc.
Sewage is a liquid or wet waste, for example, faeces, urine, wastewater from the toilet and kitchen, etc.