Abstract:The electrolyzed water treatment as the core technology was applied into demineralization and deproteinization of shrimp shell to develop a new environment-friendly process for producing chitin.The results showed that the removal efficacy of mineral and protein with the electrolyzed water prepared with 1%NaCl was more significant than that of 0.1 %NaCl.Under the condition of voltage 20 V，the extraction rate of chitin was 19.46 % with the treatment of acidic electrolyzed water （AEW）（1 %NaCl）for 6 h followed by basic electrolyzed water（BEW）（1%NaCl）for 6 h and its protein removal rate and mineral removal rate were 97.99%and 99.64 %，respectively.Moreover，the ash and protein content of chitin were 0.97 % and 3.67 %，respectively，and its moisture content was 4.82%.The lead and arsenic content were 5.1 mg/kg and 0.025 mg/kg，respectively，which were all in accordance with the national standards.Also，it could save hydrochloric acid to 96.48 % compared to the traditional method.In contrast，the exchange of AEW and BEW treatment sequence could decline the degrees of demineralization and deproteinization.The results also proved that the physical and chemical properties of chitin extracted by electrolyzed water treatment were consistent with the chitin extracted by traditional method through scanning electron microscopy，infrared spectrometry，thermogravimetric analysis and differential thermal analysis.