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三氯化铁（ＦｅＣｌ３）是一种十分有效的蛋白质凝聚剂，它对白鲢鱼糜漂洗液中的水溶性蛋白质有较强的凝聚作用。使用它，蛋白质的回收率可达８０％以上，且废水的ＣＯＤ可下降７７％左右。最适宜的回收操作条件为：体系的ｐＨ值在５．５～６．５，水温０～１５℃，ＦｅＣｌ３的投加量Ｑ根据水样的蛋白质浓度Ｃ按式Ｑ＝０．１６３Ｃ＋０．０１６（ｇ／Ｌ）确定。经测定，凝聚物含蛋白质６３．１％，脂肪５．２％，灰分２１．８％。
Ferric chloride (FeCl3) is a very effective protein flocculant, it has a strong cohesion of water-soluble protein in silver carp surimi rinse. Use it, the protein recovery rate of up to 80%, and COD in wastewater can be reduced about 77%. The most suitable conditions for the recovery are as follows: the pH of the system is 5.5-6.5, the temperature of the water is 0-15 ° C, the dosage of FeCl3 Q is calculated according to the protein concentration C of the water sample according to the formula Q = 0.163C + 0.016 g / L). After determination, the aggregate contains 63.1% protein, 5.2% fat, 21.8% ash.