Sewage Treatment

Переведите интернациональные слова.

TEXT В

Подберите эквиваленты.

1. снабжение, поставка a) to be thirsty

2. потребность, спрос b) demand

3. испытывать жажду с) potable

4. захваченный d) to consume

5. потреблять, расходовать е) available

6. промывание струей f) trapped

7. годный для питья, питьевой g) supply

8. доступный, имеющийся в наличии h) flush

11. Дайте тексту название.

float, physical, chemical, biological, filtration, pump, microorganism, separation, irrigation, agriculture, landscape, park, golf, court, ecolo­gy, concentration, prior, goal, recreation, urban, lagoon, recycling, municipal.

2. Запомните слова и словосочетании.

pretreatment— предварительная очистка;

primary treatment — первичная очистка;

secondary treatment — дополнительная очистка;

tertiary treatment — окончательная очистка;

clarifier— очистная установка, фильтр;

to be subjected to —подвергаться чему-либо;

decomposable — способный к разложению, разложимый;

habitat — среда обитания, естественная среда;

effluent polishing — доочистка, удаление остаточных примесей из

питьевой воды;

wastewater treatment plants — водоочистная станция, станция во­доочистки;

potable— годный для питья, питьевой;

impact— воздействие, влияние;

recycling — утилизация, повторное использование, регенерация;

to dilute — разжижать, разбавлять, растворять.

3. Прочитайте текст и выполните задания;

Conventional sewage treatment involves at least four stages: pre­treatment, primary, secondary and tertiary.

Pretreatment removes large particles such as trash, bits of cloth, tree limbs, leaves, other — before they can damage or clog pumps and skimmers of primary treatment clarifiers.

Primary treatment consists of temporarily holding the sewage in a quiescent basin where heavy solids settle to the bottom, oil, grease and lighter solids floating to the surface. The settled and floating materials are removed, and the liquid is subjected to secondary treatment.

Since primary treatment is insufficient, partly clarified sewage still containing decomposable substances is to undergo secondary treat­ment. Secondary treatment requires a separation process to remove microorganisms prior to discharge. Secondary treatment removes dis­solved and suspended biological matter, which is performed by indi­genous, water-born microorganisms, in a habitat.

Tertiary treatment is defined as anything more than both primary and secondary treatments. Wastewater treatment includes physical, chemical and biological processes. If disinfection is used, it is a final process known as effluent polishing.

[The treatment goal is to remove completely or to reduce significantly the concentration of all existing contaminants so that received water can suit its desired end-use without any adverse ecological impact.]⁰

[Highly treated effluent from municipal wastewater treatment plants is a reliable source of water for irrigation, industrial recycling and either non-potable or potable reuse.]⁰ If not reused, treated wastewater is commonly discharged into a water body (stream, river, bay, lagoon or wetland) and diluted. (1 460 п.зн.)

Дата добавления: 2014-12-29