Selection of Best Available Techniques for Water Softening/Ion Exchange Processes Employing TOPSIS Decision Making Model

Abstract

There is a need for different qualities of process water in the manufacturing industry, depending on the purpose of use, the process and its effects on the product. The most widely used process water preparation system is column systems using cationic ion exchange resins for hardness removal. Various best available techniques (BAT) can be applied to ion exchangers to reduce process water production costs and environmental impacts. In this study, it was aimed to evaluate the BATs presented in order to increase the environmental performance of cationic ion exchange resin systems and to determine the most appropriate techniques using the multi-criteria decision making method (MCDM). In this context, BATs were prioritized according to 11 different evaluation criteria using the Ranking Preference Technique by Similarity to Ideal Solution (TOPSIS). As a result, optimizing regeneration durations and frequencies using online hardness sensors was identified as the top priority BAT for cationic ion exchange resin systems.

Keywords

• Best available techniques (BAT)
• Ion exchange
• Resin
• TOPSIS
• Water softening

İyon Değiştirme Prosesi Kullanan Su Yumuşatma Sistemlerinde TOPSIS Karar Verme Modeliyle Mevcut En İyi Tekniklerin Seçimi

Abstract

İmalat sanayinde kullanım amacına, prosese ve ürün üzerindeki etkilerine bağlı olarak farklı kalitelerde proses suyu gereksinimi bulunmaktadır. En yaygın kullanılan proses suyu hazırlama sistemi sertlik giderimi amacıyla katyonik iyon değiştirme reçineleri kullanan kolon sistemlerdir. İyon değiştiricilerde, proses suyu üretim maliyetlerini ve çevresel etkileri azaltmak amacıyla çeşitli mevcut en iyi teknikler (MET) uygulanabilmektedir. Bu çalışmada, katyonik iyon değiştirme reçine sistemlerin çevresel performanslarını arttırabilmek amacıyla sunulan MET’lerin değerlendirilmesi ve çok ölçütlü karar verme metodu (ÇÖKVM) kullanılarak en uygun tekniklerin belirlenmesi amaçlanmıştır. Bu kapsamda MET’ler, İdeal Çözüme Benzerlik Yoluyla Sıralama Tercihi Tekniği (TOPSIS) kullanılarak 11 farklı değerlendirme kriterine göre önceliklendirilmiştir. Sonuç olarak eş-zamanlı sertlik sensörleri kullanımıyla rejenerasyon süreleri ve sıklıklarının optimize edilmesi katyonik iyon değiştirme reçine sistemleri için en öncelikli MET olarak belirlenmiştir.

Keywords

• İyon değiştirme
• Mevcut en iyi teknikler (MET)
• Reçine
• Su yumuşatma
• TOPSIS

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