Abstract
This paper is based on using coagulation--Fenton oxidation treat the corn starch wastewater, to determine the best conditions of coagulation and oxidation. Experimental results show that at the first coagulation stage, determining polyaluminium chloride (PAC) as the optimal coagulant and optimal dosing quantity of 10ml·L-1, PAC and coagulant aid polyacrylamide (PAM) dosing quantity proportion is 2:2, pH=7, the temperature of 35 °C, CODCr removal effect is best; at Fenton oxidation stage, Fe2+/ H2O2 is 2:5, CODCr removal efficiency; At the second coagulation stage, PAC and PAM dosing quantity is 70 ml·L-1, CODCr removal effectiency. The processing method has good treatment effect, it can reduce the CODCr, SS and chroma of wastewater, and eventually recycle the SS as amyloid protein and used for subsequent product production. Meanwhile, the processing method improves the economic benefit and has a high removal rate. The equipment is simple, and just cover a small area, it’s easy to operate, and doesn’t produce secondary pollution, etc.
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