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以研究清除养殖海水中营养盐的技术方法为目的,借助微藻吸收海水中无机盐的属性和海绵泵入海水从中阻留消化微藻的能力,设计了潮间带海绵间接清除海水中营养盐的方法,即先用小球藻吸收海水中无机N、P营养盐,然后放入海绵用于阻留消化海水中的微藻,接着取出海绵以保持小球藻继续吸收无机N、P营养盐。在灭菌海水和养殖海水的体系(5 L)中,微藻初始密度分别为81×104/mL和77×104/mL、放入海绵的生物量约40 g(鲜重),在保持水体中小球藻密度与接种密度相同水平条件下,海水中无机N、P营养盐浓度分别减少约60%和90%,海绵生物量增加约5%~7%。繁茂膜海绵间接清除海水中无机N、P营养盐的技术方法在封闭海水养殖体系和工厂化海水养殖体系中具有很好的应用前景。
With the purpose of studying the technical methods of removing nutrients from aquaculture seawater, with the help of microalgae absorbing the properties of inorganic salts in seawater and the ability of sponges to pump in seawater to retain digestive microalgae, we designed an intertidal sponge to remove nutrients Method, that is to use chlorella to absorb inorganic N, P nutrients in the seawater, and then into the sponge for retaining the digestion of digested algae in seawater, and then remove the sponge to keep Chlorella continue to absorb inorganic N, P nutrients . The initial density of microalgae was 81 × 104 / mL and 77 × 104 / mL in the system of sterilized seawater and aquaculture seawater (5 L), respectively, and the biomass put into the sponge was about 40 g (fresh weight) At the same level of chlorella density and inoculation density, the concentration of inorganic N and P nutrients in seawater decreased by 60% and 90%, respectively, and the sponge biomass increased by 5% -7%. Lush Membrane sponge indirect removal of seawater inorganic N, P nutrients technical methods in the closed mariculture system and factory mariculture system has good application prospects.