Promotion Of Sugar Maillard Pigment On The Regeneration Of The De-calcium Resin For Thin Juice

Coupled Regeneration of sugar resins on the basis of non-sugar resource utilization is the basic idea to reduce ion exchange wastewater in sugar industry. The existing of pigment in wastewater of regenerating resin for discoloring resin regeneration in sugar industry. This paper researched the promoting effect of maillard pigment on the regeneration decalcification of decalcification.This research postulates that the Maillard pigment, a pigment produced during sugar production, can be used to promote the regeneration of decalcification resin in sugar industry, extend resin life, improve sugar quality, and reduce process costs. Response-surface optimization and regeneration was then employed to increase the regeneration rate, and study the dynamics of the regeneration process. The present study aims to investigate the possible mechanism of Maillard pigment promoting the regeneration of decalcification resin in sugar industry. Such goal was achieved by analyzing the regeneration breakthrough curve and the physical and chemical properties of the samples before and after regeneration. The main contents of paper are as follows:The response-surface method was used to optimize the technological conditions for the regeneration of decalcification resin in sugar industry using regenerating solution with Maillard pigment. The improved regenerating solution was composed of 3% Maillard pigment and 12% sodium chloride solution. Meanwhile, the optimized conditions are as follows: temperature 72.55℃, height-to-diameter ratio 8.69:1, and flow velocity 1.76 BV/h. Under these conditions, the regeneration rate of decalcification resin in sugar industry reached up to 93.39%.Under static conditions, the desorption property, rate, and isotherm of Ca²⁺ in highly saturated BK001 resin were also studied. Results showed that the equilibrium desorption of Ca²⁺ during regeneration fits the Longmuir equation. The effects of temperature, solution concentration, and resin particle diameter on the static desorption process of Ca²⁺ in decalcification resin in sugar industry were evaluated. Moreover, the activation energy of the rate-limiting step in the Ca²⁺ exchange response process was determined. After testing, the exchange process was found to be mainly controlled by intraparticle diffusion. The reaction activation energy was calculated to be 8.39 k J/mol, and the apparent frequency factor k0 was 0.299 × 103 min^-1.The regeneration breakthrough curve and the infrared and X-ray diffraction spectra of frozen and dried samples before and after regeneration. We also assessed the antioxidant activities of the samples. During regeneration, the increase in Na+ content in the regenerating agent, as well as the addition of Maillard pigment, was noted to promote the forward movement of the chemical equilibrium. The attractive force of Maillard pigment toward Ca²⁺ was higher than that toward Na+. The coordinate between Maillard pigment and Ca²⁺ could then promote the regeneration process and improve the regeneration rate. After regeneration, the frozen and dried samples attained increased removal rates for ABTS and DPPH free radicals.On the basis of the specific production scale and indicators set by Xinjiang Lvxiang Sugar Limited Liability Company, we designed a pilot-scale ion exchange system was designed for thin juice decalcification. This system can meet the daily requirements of the sugar plant and can be replaced internally to ensure the continuity of production. Compared with the traditional thin juice decalcifying process, our method exhibited higher efficiency and greater resource conservation.