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| Subject | Italian | English |
| water.res. | letto batterico | trickle filter |
| ecol. | letto batterico | bacterial bed |
| ecol. | letto batterico | percolating filter |
| ecol. | letto batterico | trickling filter |
| environ. | letto batterico | bacterial bed A device that removes some suspended solids from sewage. Air and bacteria decompose additional wastes filtering through the sand so that cleaner water drains from the bed |
| ecol. | letto batterico | biological filter |
| water.res. | letto batterico | trickling biofilter |
| water.res. | letto batterico | dripper |
| environ. | letto batterico ad alta efficienza | high-efficiency bacterial filter |
| chem. | letto batterico sommerso | submerged bed |
| environ., mech.eng. | stazione di sollevamento per letto batterico | percolating filter pump |