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| aerating wastewater | |||
| lagooning The process in which sunlight, bacterial action and oxygen cause self-purification in waste water, Usually taking place in a shallow pond, or system of such ponds (阳光、细菌活动和氧气引起的在废水中的自然净化过程，通常在浅水池塘或池塘系统等地发生。) | |||
| aerating waste (water) | |||
| 废水曝气: 2 phrases in 2 subjects |
| Technology | 1 |
| Water resources | 1 |