As an aquaculture effluent is recognized as a source of water pollution, many methods are being researched to solve this problem. It has been reported that the aquaculture effluent contains many organic compounds containing nitrogen, phosphorus, potassium, and calcium. The purpose of this study was to investigate the possibility of using the effluent from bio-floc technology (BFT) inland aquaculture for fertilizing blueberry ‘Duke’ to promote the growth. The experiment was conducted in a commercial blueberry farm in Jinju, Gyeongsangnam-do, where blueberries are actually cultivated in order to find out the effects of fertilizers in situ. The experiment was carried out with five treatments: control with only irrigation, conventional nutrient solution fertigation, and the fertigation with three concentrations (×1, ×0.5, or ×0.25) of effluent from BFT (Bio-Floc Technology) inland aquaculture. The treatment period was from the beginning of April, when a new leaf of blueberry began to develop, to the middle of June, when the blueberry was harvested, for a total of 10 weeks. As a result of the experiment, the treatments with effluent from BFT inland aquaculture showed better growth qualities than those of control and conventional cultivation. However, there was no statistically significant difference among all treatments regarding the total fruit production. Based on these results, it was concluded that the effluent from BFT inland aquaculture can be used for the cultivation of blueberry because it is equivalent to conventional cultivation method. This study provided a new viewpoint of recycling the effluent from BFT for agricultural purpose to reduce water pollution problems due to aquaculture wastewater.

As the interest in urban agriculture and people’s demand for eco-friendly food grow, the number of urban gardeners who directly grow and harvest will increase. The aim of this study was to compare the effect of conventional fertilizer with the effluent water from the biofloc technology inland aquaculture in the concept of resource circulation as a substitute for fertilizer used in urban agriculture. In order to verify the effect of fertilizer on the cultivation of cherry tomato, tomato seedlings were transplanted on the horticultural soil without nutrients and treated for 8 weeks. Experimental treatment was carried out in five treatments: control, hyponex solution (HS), slow-released fertilizer (SF), effluent water daily treatment (DE), and effluent water treatment once a week (WE). The growth characteristics of the cherry tomatoes showed significant differences among the treatments except for root length. In the case of plant length was shown HS=WE›DE=SF›control, and stem diameter was shown DE=SF ›WE=HS›control. It was found that HS and WE were not significantly different in shoot length and diameter, and DE and SF showed no difference. In the case of number of leaves, HS, DE, and WE showed a significantly higher level than SF and control. In other growth characteristics, DE and SF showed higher growth. As for the growth of cherry tomato fruit, the sugar content did not show any significant difference among the treatments except control. Weight per fruit and yield were significantly higher in HS and WE than DE and SF. Based on these results, it is considered that the use of effluent water is comparable to the use of urban agricultural fertilizer as compared with chemical fertilizers in cultivating crops.

최근 내수면양식장의 BFT 양식 배출수의 도시농업용 활용에 관한 연구가 활발하게 본 연구진에 의해 진행되어지고 있다. 하지만 도시농 업용으로 한정된 연구에서 비료가 다량으로 사용되어 지고 있는 과수에의 활용에 대한 연구 필요성이 대두되어 누구나 가정에서도 재배가 가능한 블루베리에서 BFT 배출수의 효과를 구명하여 보고자 본 연구를 수행하였다. BFT 배출수는 내수면양식연구센터 틸라피아를 양식 하고 있는 양식조의 물을 채취하여 무처리, 농장 관행법, 배출수 원액, 배출수 1/2희석액, 배출수 1/4 희석액 시비 등 5처리로 실험하여 다음 과 같은 결론을 얻었다. 블루베리의 총생산량과 과립당 무게는 처리간 유의성이 없어 배출수가 기존의 비료를 대체하여도 블루베리 열매 의 생육에 영향을 주지 않아 비료로서의 이용가능성이 있었음을 확인하였다. 그리고 과실내 무기성분의 변화에서는 나트륨과 철의 함량이 높게 나와 이를 줄일 수 있는 배출수 비료화의 또 다른 연구 점을 보여주고 있다. 블루베리의 고유 기능성 물질인 안토시아닌의 함량 결과에 서는 처리에 따른 일관성을 보이고 있지 않아 기능성물질의 변화에도 배출수의 처리가 나쁜 영향을 보이지 않음을 알 수 있어 블루베리의 재배에 있어서도 배출수의 비료활용도는 가능성이 있다는 결론을 얻을 수 있었다. 하지만 비료로서의 사용가능성을 더 높이기 위해서는 보다 정제된 배출수의 사용과 효과를 얻기 위해서는 배출수의 가공적 연구가 더욱 필요하다고 판단된다.

본 연구는 국제적으로 해양투기의 기준이 엄격해지고 있는 현재의 실정에 맞추어 양식장에서 배출되는 배출수를 자원의 선순환의 개념으로 이를 토마토 재배에 적용하여 도시농업용 비료로서의 이용가치를 구명하고자 수행하였다. 시험용 작물로는 완숙형 토마토‘슈퍼 선로드’를 사용하였으며, BFT 배출수는 내수면양식연구센터 틸라피아를 양식하고 있는 양식조의 물을 채취하여 무처리, 상업용 하이포넥스500배 희 석액, 배출수 원액을 매일 관주, 배출수 원액을 1주에 1회 관주, 완효성 고체비료 시비 등 5처리로 실험하여 다음과 같은 결론을 얻었다. 배출 수원액을 매일 처리하는 구가 T/R율과 엽록소함량이 제일 높은 결과를 보였으며, 과실의 당도도 제일 높은 결과를 보였다. 또한 토마토의 기 능성 물질은 리코펜함량의 결과에서도 하이포넥스와 관행의 재배방법보다 3배가 많은 함량의 결과를 보였다. 하지만 토마토 체내의 무기성 분의 함량결과 질소가 다른 처리구에 비해 제일 많은 결과를 보여 비료사용으로서의 보완점을 연구해야하는 문제점도 보였다. 하지만 생육 과 기능성 물질의 함량결과등을 고려하여 본다면 BFT 양식 배출수의 비료효과에 대한 가능성은 매우 높은 것으로 나타났다.

The objective of this study is to find a useful method of utilizing effluent water from the BFT inland water culture. Recently Sludge and effluent water have been noted to cause water pollution. Therefore, this progressive study of recycling method will replace the use of chemical fertilization. Effluent water from inland water culture contains many fertilization ingredients. This study used different using methods of fertilization. As a result, effluent water that isn't matured and diluted had positive effects on the growth of lettuce. Effluent water of undiluted involved many mineral elements and proper pH concentration for plants growth but which are involved many concentrations of Na + ion. High concentrations of Na + ions are harmful for the growth of plants. This experiment did not show plants adversely affected by Na + ions. Potentially Na + ions can cause physiological disturbances of the plant. Effluent water smells because effluent waters using is need to additional pre-treatment for removal its high concentration Na + ions and bad smell.

Recently, increasing interest in environmental pollution problems that can be discharged emerging from inland water cultures, problems in the processing of effluents are recognized as environmental pollution sources are difficult accordingly. As a result, in this study, the effluent water as such a source of environmental pollution carried examine the availability of as organic fertilizer to be used for cultivation of crops. The study tested using 3 types of crops, As a method of using as a fertilizer in a particular solution that was created and practices to liquid fertilizer solution used to the concentration of the effluent. After you grow crops in a certain amount of irrigation once every week for each processing it was analyzed for the differences of content of the functional substance and growth of crops. As a result a certain amount of the effluent water in the stock solution, the content of functional materials and growth of crops were found to be superior to other processes in irrigation which was treated weekly. In conclusion, according to these results the effluent water from BFT inland water culture has been found to give a positive effects on the contents of the functional materials and growth of crops. Studies on a method for utilizing the effluent water as a fertilizer is considered further required.