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The swine manure used in this experiment was collected from a pig farm on Chongming Island, Shanghai, and stored at 0–4 °C before use. The raw swine manure was diluted ten-fold with tap water to simulate the typical wastewater washing procedure on the pig farm. Table 1 shows the characteristics of the swine manure wastewater, which is a typical high strength wastewater contained high concentrations of COD, SS and nitrogen. The seed sludge used in this study was mesophilic anaerobic granular sludge taken from an internal circulation reactor of a paper mill plant in Jiangsu, China. The concentration of the total suspended solids (TSS) and volatile suspended solids (VSS) in the seed sludge were 56.2 g/L and 45.7 g/L, respectively. The sludge was inoculated without pre-treatment.

Table 1

Characteristics of the inflow

ParameteraValueParameteraValue
pH 7.6 ± 0.1 SCOD 3,705 ± 240 
Total solids 10,850 ± 2,640 TN 743 ± 15 
VS 7,945 ± 2,156  250 ± 57 
SS 10,206 ± 2,902 TP – 
VSS 7,521 ± 2,313 SOP 98 ± 13 
TCOD 13,476 ± 2,238 VFA 1,722 ± 415 
ParameteraValueParameteraValue
pH 7.6 ± 0.1 SCOD 3,705 ± 240 
Total solids 10,850 ± 2,640 TN 743 ± 15 
VS 7,945 ± 2,156  250 ± 57 
SS 10,206 ± 2,902 TP – 
VSS 7,521 ± 2,313 SOP 98 ± 13 
TCOD 13,476 ± 2,238 VFA 1,722 ± 415 

VS, volatile solids; SS, suspended solids; VSS, volatile suspended solids, TCOD, total chemical oxygen demand; SCOD, soluble chemical oxygen demand, TN, total nitrogen; TP, total phosphorus, SOP, soluble orthophosphate; VFA, volatile fatty acids.

aExcept for pH, the units of all the other parameters are mg/L.

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