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| Russian | English |
| физико-химическая очистка сточных вод | physical-chemical wastewater treatment (a relatively new set of methods aimed at replacing conventional primary and secondary wastewater treatment processes; physical-chemical treatment is designed to remove phosphorus by precipitation and settling and to remove dissolved organics by adsorption on carbon particles) |
| химическая очистка сточных вод | chemical treatment of sewage water |