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Micro foam residue in circulating white water is a hidden hazard leading to long-term unstable water quality and intermittent paper defects. Different from pulp foam, white water foam is generated by residual sizing agents, colloidal organic matter and microbial metabolites in circulating water. Fine floating foams cannot be eliminated by conventional defoaming systems and will circulate continuously with the water system. Long-term residual white water foam causes unbalanced water flow pressure, uneven pulp dilution, intermittent pinholes and thin spots on paper surface. Meanwhile, floating foam accumulates organic impurities, breeds bacteria and slime, further deteriorates water quality, accelerates mesh and felt fouling, and increases the frequency of unplanned shutdowns. Conventional defoamers only eliminate visible large foam, with poor removal effect on micro floating foam, and long-term use will affect water system microbial balance. Shandong Ludao Energy Technology Co., Ltd. launches targeted white water foam elimination and stabilization solutions. By decomposing foam-inducing organic substances and eliminating micro floating bubbles, we thoroughly solve white water foam residue problems. The solution purifies circulating water quality, avoids intermittent paper defects caused by foam, reduces equipment fouling, and ensures long-term clean and stable operation of the white water circulation system.