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The water targeted in the present study was from a drinking water source of a city in the south of China. Reports of raw water during experiments for both bench and pilot scale tests are shown in Table 1, which was characterized by a high odor (200 and 150 on average for bench and pilot scale tests, respectively) and chroma (25 and 22 times on average for bench and pilot scale tests, respectively), moderate turbidity and a low chemical oxygen demand (CODMn). The low nutrient level in raw water explained the low concentration of algae counts (Chen et al. 2009). The data collected over the study period without preoxidation illustrated that the change pattern of water turbidity after settling was inconsistent with that of the raw water threshold odor number (TON) and chroma.

Table 1

Raw water quality for bench and pilot scale experiments

ParametersUnitsBench scale experimentsPilot scale experiments
Average valueAverage value
Temperature °C 25 25 
pH -a 6.89 7.19 
Turbidity NTU 31.8 18.9 
TON -a 200 150 
Chroma Times 25 22 
CODMn mg L−1 4.30 4.90 
DO mg L−1 2.55 1.76 
NH4+-N mg L−1 2.33 2.03 
NO3-N mg L−1 0.90 1.36 
NO2-N mg L−1 0.28 0.17 
Volatile phenol mg L−1 <0.002 <0.002 
Algae counts 104 cells L−1 234 245 
ParametersUnitsBench scale experimentsPilot scale experiments
Average valueAverage value
Temperature °C 25 25 
pH -a 6.89 7.19 
Turbidity NTU 31.8 18.9 
TON -a 200 150 
Chroma Times 25 22 
CODMn mg L−1 4.30 4.90 
DO mg L−1 2.55 1.76 
NH4+-N mg L−1 2.33 2.03 
NO3-N mg L−1 0.90 1.36 
NO2-N mg L−1 0.28 0.17 
Volatile phenol mg L−1 <0.002 <0.002 
Algae counts 104 cells L−1 234 245 

aNo unit.

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