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(발표자료) ICOM2014 국제막학회 발표자료 - CAST를 이용한 가압식분리막 전처리 실증데이터
작성자 : 삼보과학   작성일 : 2014-08-01   조회수 : 2471
파일첨부 : ICOM2014 Poster Presentation_20140722.pdf
삼보과학에서는 환경부 하폐수고도처리기술개발사업의 일환으로 경기도 소재 하수처리장에서 당사 제품인 CAST 응집제 주입률 자동제어시스템을 이용하여 가압식 분리막 전처리 실증테스트를 실시하였으며, 그 자료를 기반으로 2014년 7월 중국 Suzhou에서 개최된 ICOM(International Congress on Membrane & Membrane Processes) 국제학회에서 포스터발표를 하였습니다.

제목 : Optimizing the Coagulant Dose to Control Membrane Fouling using Online Charge Based Automatic Titration System (CAST) in Combined Coagulation/Microfiltration (MF)

초록 : As pretreatment, coagulation, oxidation and adsorption have been studied, and proven to be effective to reduce membrane fouling. Coagulation is a common pretreatment due to its good performance, and Gao et al. demonstrated that coagulation is the most successful pretreatment for fouling reduction in full scale treatment. That is because coagulation can remove the dissolved organic matter (DOM), which is an important membrane fouling factor.        

Commonly, organic matters with low molecular weight and large solubility cannot be removed effectively by the coagulation-sedimentation, which has high removal efficiencies for the hydrophobic organic matters of macromolecule in water. The pre-coagulation technologies applied before the microfiltration membrane can be mainly divided into two kinds, including standard coagulation and online coagulation. Coagulant dosing is traditionally based on jar-tests or operator experience, resulting in either overdosing or insufficient dosing. In this study, we assess the feasibility of a new coagulant dose control instrument, the online charge-based automatic titration system, charge analyzing system with titrator (CAST), to control membrane fouling in microfiltration (MF), following coagulation for the reclamation of municipal wastewater.

This paper presents a 100 m3/d pilot for effect of fouling control and organic matters (COD, DOC) removal using a coagulation/MF process with an online real-time charge analyzing system with titrator (CAST) system to control coagulant dosing. The online CAST coagulant dose control system allows the coupling of real-time colloid charge titration with on-line feed forward control. This system promises to measure coagulant or cationic demand (CD) volume over time in highly fluctuating wastewater quality conditions. The CAST system is a continuous sampling, on-line instrument that enables the treatment plant operator to know precisely and at all times the optimum coagulant dosage.

Initially, the MF membrane with In-line mixer with constant feed of coagulant (control) was operated at 60 LMH with a CIP interval of 16 days. The results of this research showed that microfiltration (MF) run time using In-line mixer with CAST system compared to the control unit can be extended 1.375 times of CIP interval due to the cake layer protection to the membrane, and cake layer characteristics were important for membrane performance. Over the three month study period, this equates to a reduction in the average coagulant dose of 2.1 mg/L (14%) and an over 10% and 20% increase in the average COD and UVA removal by the CAST unit compared to the control unit, respectively. Gao et al. considered that the pre-coagulation put emphasis on improving filtration efficiency of UF/MF membrane, so it was vital to choose proper coagulants and control coagulation conditions to produce flocs that had the best coagulation-UF/MF treatment efficiency based on raw water quality.

 
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이전글 [CAST] 동아경제신문 - 삼보과학 '응집제 주입 자동결정 제어시스템' 보도 자료
다음글 (발표자료) 2014 경기도수질오염총량정책포럼 발표-CAST를 이용한 하수처리장 및 분리막 적용사례
       

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