NGHIÊN CỨU CÔNG NGHỆ BAC - BSF XỬ LÝ NƯỚC THẢI KHU CÔNG NGHIỆP SÓNG THẦN 1 CHO MỤC ĐÍCH TÁI SINH=APPLICATION OF BAC - BSF TECHNOLOGY TO TREAT WASTEWATER FROM SONG THAN 1 INDUSTRIAL PARK FOR REGENERATION PURPOSE

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Thông tin xuất bản: Tạp chí Khoa học Công nghệ và Thực phẩm (Tên mới: Tạp chí Khoa học Đại học Công Thương), 2018

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ID: 487613

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Nghiên cứu này nhằm đánh giá hiệu quả xử lý của mô hình kết hợp BAC-BSF (gồm cột lọc than hoạt tính - BAC và theo sau là cột lọc cát sinh học - BSF) đối với nước thải khu công nghiệp Sóng Thần 1 cho mục đích tái sinh. Kết quả nghiên cứu cho thấy có thể lựa chọn tải trọng thuỷ lực 1 – 3 m3/m2h cho phương án tái sinh nước vì ở tải trọng này hiệu quả của quá trình tương đối tốt và ổn định, cụ thể hiệu quả xử lý nhu cầu oxy hóa học (COD) đạt 78,2% (15,0 ± 5,0 mg/L), độ màu 81,2% (18 ± 5 Pt-Co), nitơ tổng đạt 58,7% (5,0 ± 1,0 mg/L), photpho tổng đạt 61,2% ứng với tải trọng thuỷ lực 2 m3/m2h. Khi áp dụng BAC-BSF để tái sinh nước thải khu công nghiệp Sóng Thần 1, nước thải sau xử lý có thể đạt yêu cầu chất lượng nước tái sinh với chất lượng thấp và trung bình, nhưng tổng số coliform và độ màu còn cao. Do đó, để áp dụng nước sau xử lý cho quá trình tái sinh với chất lượng cao cần tăng cường khả năng khử tổng lượng carbon hữu cơ (TOC), khử màu đồng thời khử đục trước khi vào BAC.Từ khóa: BAC, BSF, nước thải công nghiệp, tái sử dụng nước thải.This research aims to assess the efficiency of the BAC-BSF combination model(including biological activated carbon (BAC) column and followed by bio-sand filter (BSF)) for treatment of wastewater from Song Than 1 industrial zone for purpose of regeneration. Research results showed that hydraulic capacity of 1-3 m3/m2h can be selected for water recycling because this load was the result of relatively good and stable process, COD ratio was 78.2% (15.0 ± 5.0 mg/L), color 81.2% (18 ± 5 Pt-Co), total nitrogen 58.7%, total phosphorus 61.2% (5.0 ± 1.0 mg/L), the hydraulic load rate at 2 m3/m2h. When applying BAC-BSF in recycling wastewater of Song Than 1 Industrial Zone, the treated wastewater can meet the recycled water quality requirements at low and medium level, but the values of coliform and color are still high. Therefore, to apply the post-treated water for high-quality regeneration, there’s a need to increase the removal of total organic carbon (TOC), color and turbidity before entering BAC.Keywords: Biological activated carbon (BAC), bio-sand filter (BSF), wastewater reuse

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