Multistage A-O Activated Sludge Process for Paraformaldehyde Wastewater Treatment and Microbial Community Structure Analysis

Table 1

Flooding water quality and sludge properties in the field.

Index	HCHO (mg/L)	COD (mg/L)	pH	MLSS (mg/L)	DO (mg/L)	SV30 (%)	SVI (mL/g)	SS (mg/L)
Content	650~1200	4000~5800	3.55~3.80	5900~15000	3.40~4.75	90~98	124~683	200~440