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J Korean Soc Environ Eng > Volume 37(10); 2015 > Article
J Korean Soc Environ Eng 2015;37(10): 573-577. doi: https://doi.org/10.4491/KSEE.2015.37.10.573
바이오매스 가스화 발전설비의 목질계 타르폐수 응집 처리 특성
김이태, 안광호
한국건설기술연구원 환경플랜트 연구소
Characteristics of Coagulation Treatment for Wood Tar Waste Water in a Biomass Gasification Plant
I tae Kim, Kwangho Ahn
Environmental and plant Eng. Research Division, Korea Institute of Civil Engineering and Building Technology
Corresponding author  I tae Kim ,Tel: 031-910-0301, Fax: 031-910-0291, Email: itkim@kict.re.kr
Received: September 9, 2015;  Revised: October 15, 2015;  Accepted: October 28, 2015.  Published online: October 31, 2015.
ABSTRACT
There are difficulties in removing wood tar wastewater coming from the power plants that use wood-based fuels due to its intermittent occurrences and severe changes in the amount and concentration. This study investigated the treatment characteristics through physicochemical treatment, an improved method from the existing ones using bag filters and activated carbons to treat wood tar wastewater. In the case of chemical properties of wood tar wastewater, the content of phenols was found to be more than two times higher than that of guaiacols and carbohydrates. Installation is done to ensure that NaOH and PAC are injected automatically according to the change of pH, and then pH, turbidity and SS of the final treated water were examined. The results were 5.9, 12.6 NTU and 15.1 mg/L respectively, which confirmed the possibility of the treated water as circulation water of power plants. In the physical treatment process using a conventional bag filter, removal efficiency of chemicals was about 20%, but the treatment efficiency was improved to show chemical removal efficiency of about 80% through flocculation and sedimentation.
Key Words: Tar-Containing Wastewater, Biomass, Gasification, Power Plant
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