Water Technology

NAME OF THE COURSE Water Technology



Year of study


Course teacher

Prof Marina Trgo

Credits (ECTS)


Associate teachers

Type of instruction (number of hours)






Status of the course


Percentage of application of e-learning

0 %


Course objectives

Students will introduce to procedures for the preparation of water used in the food industry, as well as associated wastewater treatment processes.

Course enrolment requirements and entry competences required for the course

Passed exam in subject Analytical chemistry.

Learning outcomes expected at the level of the course (4 to 10 learning outcomes)

After passing the exam the student is expected to know:
- Explain the processes for the preparation of drinking water used in the food industry
- Water quality requirements for different types of food industry
- Procedures for softening water
- Methods of test facilities biodegradable substances in water
- Conventional methods of wastewater treatment
- Advanced methods of wastewater treatment
- Basic regulations relating to water quality in the nature and maximum permissible concentrations of harmful substances in wastewater prior to discharge into the environment.

Course content broken down in detail by weekly class schedule (syllabus)

1st week: Hydrology. The water cycle, evaporation, infiltration, precipitation, underground and surface runoff. Condition of natural waters in Croatia. The division of water in nature.
2nd week: The water quality in Croatia, well-developed system of water supply and drainage. Preparation of drinking water. The use of water in the chemical and food industry.
3rd week: Physical and chemical properties of water. Indicators of water quality. Technological processes of water treatment. Filtration, membrane processes.
Seminar: Evaluation of water quality in the nature on the basis of chemical composition.
4th week: The application of membrane processes in the industry. Desalination. Adsorption. Adsorbents in water treatment technology.
Seminar: Calculation of capacity of different adsorbents. Ion exchange, the possibilities of performances, calculation of ion exchange capacity.
5th week: Application of ion exchange processes in the preparation of process water. Seminar: Calculation of water hardness on the basis of chemical composition. The written knowledge tests.
6th week: The use of ion exchange in removal of heavy metal ions from water. Seminar: Design of ion exchanger, preparation of seminar works in the working groups.
7th week: Coagulation and Flocculation. Choosing a coagulant in the industry. The carbonate hardness. Water softening. Seminar: The calculation of precipitating agent dose, preparation of seminar works in the working groups.
8th week: Wastewater treatment. Selection methods and pathways for wastewater treatment. Seminar: preparation of seminar works in the working groups.
9th week: Biological treatment of wastewater. Aerobic and anaerobic treatment methods, design of bioreactors. Seminar: preparation of seminar works in the working groups. The written knowledge tests.
10th week: Phosphorus and nitrogen compounds in the treated effluent. Removal of nutrients from the water. Seminar: preparation of seminar works in the working groups.
11th week: Overview of advanced water purification process. Examples of multiple use of water in industry. Seminar: Oral presentation of the seminar works.
12th week: Examples of methods of wastewater treatment industry of alcoholic and non-alcoholic beverages. Seminar: Oral presentation of the seminar works.
13th week: Examples of methods of wastewater treatment industries of dairy products. Seminar: Oral presentation of the seminar works.
14th week: Examples of methods of wastewater treatment industry of meat and associated products. Field work - Visit the plant for the preparation of drinking water.
15th week: Field work - Visit the plant for sewage wastewater treatment. The written knowledge tests.
1st Laboratory exercise: Monitoring the process of adsorption of dissolved organic matter on the activated carbon by batch method using COD. Calculation of main process parameters.
2nd Laboratory exercise: Kinetic monitoring of biochemical degradation of organic matter using BOD. Calculation of the kinetic parameters.
3rd Laboratory exercise: Testing of coagulation and flocculation of colloidal particles dispersed in the aqueous solutions using jar test.
4th Laboratory exercise: Water softening using milk lime.
5th Laboratory exercise: Removal of total hardness of water neutral cation exchanger
6th Laboratory exercise: Removal of Pb2+ using zeolite fixed bed method. Calculation of removal capacities in relation to the operating conditions.

Format of instruction:

Student responsibilities


Screening student work (name the proportion of ECTS credits for eachactivity so that the total number of ECTS credits is equal to the ECTS value of the course):

Class attendance




Practical training


Experimental work







Seminar essay






Oral exam




Written exam






Grading and evaluating student work in class and at the final exam

The requirement for admission to laboratory exercises is passed an oral colloquium for each exercise. Overall assessment can be applied over three written tests and one oral assessment. Written tests are related to material adopted in lectures, seminars, field work and laboratory exercises. The oral test is related to the presentation of the seminar work.
Ratings on the written exam and the written exams: 60-69% is sufficient, 70-79% good, 80-89% is very good, 90-100% excellent.
Students who have not passed the exam through the assessment should have the regular exam. Regular exam means written test and oral exam. The rating, which is entered in the index, is the mean score of written test, oral test and laboratory exercises.

Required literature (available in the library and via other media)


Number of copies in the library

Availability via other media

D. Hendrics, Water Treatment Unit Processes, Taylor and Francis Group, Boca Raton, 2006.


kod predmetnog nastavnika

S. Tedeschi, Zaštita voda, HDGI, Zagreb, 1997


kod predmetnog nastavnika

R.D. Noble, P.A. Terry, Principles of Chemical Separations with Environmental Applications, Cambridge University press, 2004


kod predmetnog nastavnika

N.G. Wung Jern, Industrial Wastewater Treatment, Imperial College Press, London, 2006.


kod predmetnog nastavnika

Optional literature (at the time of submission of study programme proposal)

F. N. Kemmer, Prijevod: I. Begovic, D. Vidić, Nalkov priručnik za vodu, Građevinska knjiga 2005.

Quality assurance methods that ensure the acquisition of exit competences

- Consultation with students
- Continuous writing assessment
- Results on the written knowledge tests
- Student’s questionnaire.

Other (as the proposer wishes to add)