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Task 1:

In common the wastewater flowing to a waste-water treatment plant is divided according to its source into four waste-water types. Name these and provide an illustration for each.

Task 2: The yield of municipal waste-water corresponds essentially with the domestic consumption of fresh water.

a) Provide the average water consumption in countries such as Palestine and Jordan in litres per inhabitant and day.

b) Draw a diagram of the typical daily curve of the wastewater inflow to a waste-water treatment plant with 50,000 PT [y-axis: Q (m3/h); x-axis: time (h)].

Task 3: Give some exs for the given characteristic parameters of the municipal wastewater:

a) General parameters.
b) Group parameters.
c) Individual substance parameters.
d) Nutrient parameters.

Task 4: Municipal waste-water is in part changed in its properties all along its flow-path from its place of origin to the waste-water treatment plant. Name the procedures that can lead to changes in the properties of the waste-water all along the flow-path.

Task 5: Protein as part of the human nutrition comprises nitrogen in the form of amino acids. Correspondingly human metabolic products as well comprises of organic and inorganic nitrogen compounds.

a) Which organic nitrogen compounds are excreted in large quantities with the urine by humans?

b) On the flow-path from the place of origin to the wastewater treatment plant this organic nitrogen compound is split by enzyes into two inorganic compounds. prepare the chemical reaction equation of this transformation.

c) How are the transformation procedure and the corresponding enzyme designated?

d) Inorganic nitrogen compounds flow extensively as ammonium and not as ammoniac into the municipal waste-water treatment plants. describe by what means the position of the balanced reaction:

NH3 + H2O  NH4+ + OH-

is shifted into ammonium.

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