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Sectors / Environmental

Environmental Microbiology

Drinking water testing, wastewater and sewage treatment, soil and air microbiology, environmental sampling and indicator organisms.

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Daily quiz5 questions a day Courses1 courses Virtual practicals4 practicals Calculators2 tools Mock tests

Departments

Water MicrobiologyDrinking water testing and indicator organisms WastewaterSewage treatment and wastewater analysis Soil & AirSoil and air microbiology and sampling Environmental QualityMonitoring, pollution and waste management

Courses

Certificate courses from beginner to advanced.

FREEbeginnerWater Microbiology

Water and Wastewater Microbiology

Indicator organisms, IS 10500, sampling, membrane filtration and MPN, wastewater treatment, soil and air microbiology, and laboratory quality.

7 lessons · 4 h

Virtual practicals

Simulated practicals with new data every attempt and a certificate for each one you pass. Results are simulated for learning.

5 tests

FREE12 min

Drinking Water: Membrane Filtration Count

Collect a tap sample correctly, filter it, count colonies per 100 mL and decide whether the water meets IS 10500.

Wastewater: BOD Determination

Choose dilutions, read dissolved oxygen, check the depletion rules and calculate BOD for a wastewater sample.

Water Chlorination: Dose, Demand and Residual

Work out chlorine dose from demand and the residual needed, calculate how much hypochlorite to add and check the residual.

Wastewater: COD by Dichromate Reflux

Run blanks and samples, titrate excess dichromate with ferrous ammonium sulphate, and calculate COD.

Calculators

Each tool shows the formula, a worked example and its limitations.

Membrane filtration count per 100 mLConvert colonies on a membrane to CFU per 100 mL of water.FREE BOD₅ (unseeded dilution method)Biochemical oxygen demand from dissolved oxygen readings.PRO

Mock tests

Timed tests with explanations and a score report.

FREE15 Q · 20 minMembrane filtration calculationsCounts per 100 mL from colonies and volume filtered.Start FREE15 Q · 20 minBOD calculationsDissolved oxygen depletion and dilution.Start PRO15 Q · 20 minCOD calculationsDichromate reflux titration results.Start FREE15 Q · 20 minChlorination calculationsDose, demand, residual and hypochlorite quantities.Start FREE15 Q · 15 minWater and wastewater microbiology testIndicators, sampling, methods, wastewater treatment and soil and air basics.Start