본 실험에서는 대청호에서 발생한 남조류를 대상으로 SiC(Silicon carbide) 평막의 최적 운전조건을 도출하고자 하였다. 이를 위해 원수 농도에 따른 투과플럭스, 응집제 주입 조건, Air scrubbing 조건, 역세척(Backwashing) 유량 및 시간, 여과 및 역세척 시간, 응집제 종류 및 주입 농도 등에 대해 안정적으로 운전이 가능한 최적 조건을 도출하였다. 특히, 저농도의 응집제 주입에도 음전하를 띄는 조류 입자들과 전기적으로 중화를 일으켜서 생성된 미세 플럭들이 SiC 평막의 막표면에서 투수성을 증가시킨 것으로 사료된다. 이를 통해 도출된 설계인자로 제작한 Pilot Plant를 조류 제거시 적용하고자 한다. 본 연구는 환경부의 “환경정책기반공공기술개발사업”으로 지원받은 과제입니다.

This study is the development to standard for evaluation performance of the waterproofing and root resistance combined membrane layer on the green roof system, and it is especially to evaluate to chemical resistance of it

Loss of leaf green color results from chlorophyll (Chl) degradation in the chloroplasts, but little is known about how Chl catabolism is tightly regulated throughout development. Using the stay-green (sgr) mutant in rice which maintains leaf greenness during senescence, we identified SGR by map-based cloning. SGR is a function-unknown gene encoding senescence-induced chloroplast protein. Transgenic rice overexpressing SGR produced yellow leaves, indicating that SGR regulates Chl degradation at the transcriptional level. Leaf stay-greenness of the sgr mutant is mainly associated with a failure in the destabilization of light-harvesting complexes (LHCs) of thylakoid membranes, which is a prerequisite event for the degradation of Chl and LHCs during leaf senescence. SGR binds to light harvesting complex of photosystem II (LHCII), but its biochemical role is so far unknown. During senescence, Chl should be degraded rapidly and safely because Chl catabolic intermediates producing ROS under light are extremely toxic to the plant cells. For safe and rapid degradation of Chl and its catabolic intermediates, Chl catabolic enzymes (CCEs) must catch the Chl intermediates effectively. In recent years, although molecular functions of SGR and CCEs have been characterized in detail, their biochemical mechanism for Chl detoxification remain elusive. Here we show that all five CCEs also specifically interact with LHCII. In addition, SGR and CCEs interact directly or indirectly with each other at LHCII, and SGR is essential for recruiting CCEs in senescing chloroplasts. These data indicate a predominant role for the SGR-CCE-LHCII protein interaction in the breakdown of LHCII-located Chl, likely to allow metabolic channeling of phototoxic Chl breakdown intermediates upstream of nontoxic pFCC.