K. Yoshimura, K. Usuki, T. Yoshimatsu, K. Tanaka, A. Ishizaki-1997
Nippon Suisan Gakkaishi, 63: 912-919, in Rotifer News, 30 (Dec '97)
In high density culture of rotifer, a large amount of suspended organic matter accumulates in the culture medium. Such wastes are mainly composed of rotifer feces, amictic egg shells, microbes (bacteria, protozoa, fungi etc.), the food organisms Chlorella and flocks of various sizes are formed and coagulate. A filtration unit was developed, which was composed of nylon filtration mats and stainless steel frames to aid mixing of the culture medium. While the flocks increased in the culture medium without filtration, the flocks larger than 30 micro m could be efficiently removed with filtration and culture was feasible at a rotifer density of 10^4 ind./ml.
(Fukuoka Mariculture Corp, Fukuoka 81135, Japan)