Abstract: Jar tests were conducted to investigate the performance of enhanced primary treatment processes for low-concentration municipal wastewater from South China by using composite flocculant combined with bio-flocculants Pullulan and poly-aluminum-chloride (PAC). The optimum dosage for composite flocculant and conditions for flocculation were determined. The experimental results indicated that composite flocculant had high efficiency for removing over 95% of turbidity, over 58% of COD_Cr (chemical oxygen demand determined with potassium dichromate), over 91% of TP (total phosphate), and over 15% of NH₃-N. Moreover, it could improve sludge settling and dehydration properties, and decrease the treatment cost.

Key words: Bio-flocculant, Pullulan, Enhanced primary treatment

Please provide your name, email address and a comment

Your Name: Affili: E-Mail Address:

Comment (Please comment in English):


Verification Code(click to change a pic):