Hatice Merve BAŞAR, Barış GÜZEL, Pembe ÖZER ERDOĞAN, Selda MURAT HOCAOĞLU, Doğan ÖZEL, Şeyla ERGENEKON, Leyla TOLUN

Deniz dibi tarama malzemesinin faydalı kullanımı için yıkama-eleme tesisi tasarımı ve yıkama-eleme prosesi atıksuyunun yönetimi

Deniz dibi tarama faaliyetlerinden kaynaklanan dip tarama malzemelerinin (DTM) yönetimi küresel bir sorundur. Ülkemizde DTM’ler genellikle dökü gemileriyle açık denize boşaltılmakta ve sucul ortam için ciddi bir risk teşkil etmektedir. Bu çalışmada, dip tarama faaliyetleri neticesinde ortaya çıkan DTM’lerin ve yıkama atıksularının karakterizasyonu belirlenmiş ve DTM’nin beton uygulamalarında ince agrega olarak faydalı kullanımı için bir yıkama-eleme tesisi tasarımı yapılmıştır. Ayrıca, kurulması planlanan yıkama-eleme tesisinin pilot bölgeler için maliyet analizi gerçekleştirilmiştir. Bu çalışma ile DTM’nin yıkama-eleme ön işlemine tabi tutulması durumunda yüksek klorür, sülfat ve su içeriğinin giderilerek ince agrega olarak beton çalışmalarında kullanılabileceği, oluşan yıkama-eleme atıksuyunun kanalizasyona/denize deşarjına risk oluşturacak herhangi bir kirletici içermediği belirlenmiştir. Olası 1.500 m3/gün kapasiteli bir DTM yıkama-eleme tesisinin ilk yatırım ve işletme maliyetlerinin sırasıyla 6.753.600 TL ve 2.366.810 TL ve birim maliyetinin ise 6,3 TL/ton olacağı tahmin edilmiştir.

Washing-sieving plant design for the beneficial use of marine dredged material and management of wastewater from washing-sieving process

The management of dredging materials (DM), which is generated from marine dredging acitivities is a global problem. DMs in our country are usually dumped at sea by barges and pose a serious risk to the aquatic environment. In this study, the characterization of the DMs excavated by dredging operations and the characterization of their washing wastewaters are determined and the design of a washing-sieving plant for the beneficial use of DM as a fine aggregate in concrete applications is carried out. Furthermore the cost analysis of the washing-sieving plant planned to be established for pilot regions is peformed. The findings of this study indicate that DM can be used as a fine aggregate in concrete applications in case of subjecting to the washing-sieving pre-treatment process, generated washing-sieving wastewater does not involve any contaminant causing a risk to the sewage/sea discharge. The first investment and operating costs of possible DM washing-sieving plant’s having a capacity of 1,500 m3/day are predicted to be 6,753,600 TL and 2,366,810 TL, respectively, and the unit cost is presumed as 6.3 TL/ton.

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