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G시 하수처리장의 미세플라스틱 함유량 특성과 배출량 추정
강희준 ( Heejun Kang ),박새롬 ( Saerom Park ),이복진 ( Bokjin Lee ),윤상린 ( Sanglyn Yoon ),오혜철 ( Hyecheol Oh ),안재환 ( Jaehwan Ahn ),김석구 ( Seog-ku Kim ) 한국수처리학회 2020 한국수처리학회지 Vol.28 No.4
Microplastics (MP) are small plastic particles in the environment. MP are plastics smaller than 5 mm and main sources are from cosmetic products, laundry, industrial processes and sewage treatment plant. MP that generated from use of people mainly enter sewage treatment plants. Although MP were removed from the final effluent more than 90%, large amount of MP are flow into the sewage treatment plant, lots of untreated MP is being discharged into the water environment. MP entering the water environment adversely affect the ecosystem due to adsorbed persistent organic pollutants (POPs) substances in MP and chemical susbstance added during plastic production. In order to confirm sewage treatment recudtion rate in G city, each sewage treatment process and sludge were analyzed quantitatively and qualitatively and estimate the amount of microplastics flow out into the environment. As a result of the analysis, 595.4 MP/L in sewage influent and 13.1 MP/L in the final effluent and the reduction efficiency was 97.8%. Microplastics contained in the final sludge were 70,571 MP/kg. Untreated microplastics from sewage treatment plant flowing into the river is 2,371 million per day, and it is possible to 811,566,500 microplastics were recycled to fertilizer, it can be leaked into the soil.
하수처리장에 함유된 미세플라스틱의 물질수지와 환경으로의 유출량 평가
강희준 ( Kang Heejun ),박새롬 ( Park Saerom ),김석구 ( Kim Seog-ku ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
Microplastics, defined as less than 5 mm plastics, were originated from plastic beads in cosmetic and personal care products, laundering of synthetic clothes, abrasion of tyres. In particular, one of the main source is sewage treatment plant. Microplastics contained in sewage can be adsorbed organic pollutants such as Polychlorinated Biphenyls (PCBs) and Persistent Organic Pollutants (POPs); hence, these have the potential to adversely affect the environment. This study aims at estimating amount of microplastics and behavior in sewage and sludge. It is located in Goyang-si, Gyeonggi-do, Republic of Korea. This plant treats about 132 tons of sewage sludge per day and 200,000 tons of sewage water per day. Each treatment process sewage and final sludge was sampled. For a quantitative and qua analysis, microplastics extraction experiment was conducted based on the National Oceanic Atmospheric Administration’s methods. Microplastics were identified with stereoscopic and FT-IR analysis. As a result, polyester (16%), epoxy resin (14%), polypropylene (11%) were detected and most detected shape of microplastic was fiber. Amount of microplastics in influent were 595.4 (±95.9) MPs/L and 13.1 (±9.4) MPs/L in effluent. Although the microplastics contained in sewage water were removed over 90%, sludge contained 70,571 (±38,528) MPs/kg and it were not treated. Untreated sludge is recycled as biosolid and it can be leaked into soil environment. the effluent and sludge from sewage treatment plant pollute the soil and water environment. As a further research, we will study how to reduce MPs contained in sludge by using the sludge treatment process.
노유미 ( Yu Mi Ro ),강희준 ( Heejun Kang ),이상돈 ( Sang Don Lee ) 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.4
This study was conducted the vegetation clustering analysis for the 3 mountains of Mt. Bulam, Mt. Daemo, Mt. Bonghwa which were the urban forests of Seoul. Based on the results of the analysis related to the vegetation clustering, it was found that the clustering of Mt. Bulam consisted of pine trees(Pinus densiflora)-Mongolian oak(Quercus mongolica), Hornb eam(Carpinus laxiflora)-Pitch pine(P. rigida), oriental oak(Q. variabilis)?a wild pear tree(Sorbus alnifolia) while the clustering of Mt. Daemo consisted of Pitch pine-Japanese larch(Larix leptolepis), Poplar(Populus tomentig landulosa)- black birch(Betula davurica pall). Meanwhile, the clustering of Mt. Bonghwa consisted of pine trees-a wild pear tree Community and Sawtooth oak(Q. acutissima)-Cherry Blossoms(Prunus serrulata). In relation to the similarity index by region in Mt. Bulam, Mt. Daemo, and Mt. Bonghwa, the similarity index of Mt. Bulam and Mt. Daemo stood at as high as 0.634, suggesting the distribution of similar vegetation, and the dominance index of the Mt. Daemo region was found to be 0.166 which suggests the dominance of many species compared to other regions. In addition, the results of species diversity showed that Mt. Daemo had the highest stability, and the species diversity, maximum species diversity, evenness indices were highest in Mt. Bulam, followed by Mt. Bonghwa and Mt. Daemo. The dominance index was the lowest in Mt. Bulam, followed by Mt. Bonghwa and Mt. Daemo.