1) Name 2 places for which Ham Hill treats waste water:

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2) How does waste water get to Ham Hill?

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Preliminary treatment

3) What is the first treatment that waste water goes through?

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4) How big are the screen holes?

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5) What is removed?

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6) What is the site's name for this solid stuff?

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7) What happens to the solid stuff in the liceps?

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8) Where is the solid stuff taken eventually?

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9) Where does the waste water go next?

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10) What happens to the waste water in these channels?

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Primary tanks

11) How does the water get from the grit removal channels to the primary tanks?

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12) How many primary tanks are there?

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13) How many primary tanks are normally used?

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14) When are all the tanks sometimes used?

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15) How long does the water stay in the primary tanks?

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16) What happens to the inorganic material in the primary tanks?

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17) What do the half bridge scrapers do?

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Biological treatment

18) How many activated sludge lanes are there?

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19) What do the diffusers pump into the lanes?

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20) Why is this gas needed?

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21) What do bacteria do in these lanes?

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22) How many zones are there in each lane?

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23) Why is some activated sludge removed from the system?

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Final settlement tanks

24) What is the effluent?

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25) What happens to the activated sludge and effluent in the final settlement tanks?

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26) Which river is it discharged to?

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27) Who checks that the effluent going back to the river meets the correct standards?

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Sludge

28) Where is the sludge taken to when it leaves the primary tanks?

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29) What happens to the solids?

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30) How long does the sludge stay here?

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31) What temperature is this place?

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32) Why does this place need to be warm?

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33) What is produced as a byproduct?

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34) What is this gas used for?

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35) Where does the digested sludge go next?

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36) What happens to the sludge in the press building?

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37) What is de-watering?

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38) What is the sludge used for after treatment?

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39) As you walk round the site draw pictures of the following things:

INLET SCREEN

LICEPS TO CLEAN SCREENINGS

GRIT REMOVAL CHANNELS

PRIMARY TANKS

ACTIVATED SLUDGE LANES

FINAL SETTLEMENT TANKS

PRIMARY DIGESTER

SECONDARY DIGESTER

PRESS BUILDING