Design of a demonstration plant that enables low-cost recycling of fisheries industrial wastes that contain harmful heavy metals and prevents environmental pollution

在扇贝加工废水的处理中，我们已经建立了一种只用弱酸清洗含Cd的中肠腺的方法。在这里，我们用弱酸对去除内收肌和贝壳后得到的软性部分进行清洗，以探讨从软性部分的清洗到含Cd废液的处理的整个流程的合理性。结果，我们建立了(A)通过将简单加热装置和脱水装置相结合来提高洗涤部件回收率的方法；(B)防止总洗涤液中有用成分损失的回收条件；(C)包括最终废液安全处置过程的系统。

In the treatment of scallop-processing wastes, we have so far established a method for washing only the Cd-containing midgut gland by using a weak acid. Here, we used a weak acid to wash the soft parts obtained by eliminating the adductor muscle and shell in order to discuss the rationality of the total process, from washing of the soft parts to disposal of the waste fluid containing Cd. As a result, we established (a) a method for increasing the rate of recovery of washed parts by combining a simple heating unit and a dehydration unit ; (b) recovery conditions for preventing the loss of useful ingredients from the total washing fluid ; and (c) a system that included a process of safe disposal of final waste fluid.