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Aquaculture Effluent Essay

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. Nutrients from aquaculture effluents
In general, waste produced by aquaculture is small quantities if compared with agriculture effluent. Increasing activities and production of aquaculture lead to environmental concern where aquaculture effluent can give negative impact to it. Aquaculture effluent mostly has phosphorus and nitrogen content. Aquaculture has contributed to environmental degradation whether visible impact such as particulate organic matter increased or chemical change such as reduction of dissolved oxygen and concentration of nitrogen and phosphorus increased in water (Troell et al., 1999). Eutrophication process could happen when water body is high with nutrient. The bad impact of aquaculture on the environment due to the release of phosphorus and nitrogen which is related to eutrophication process and mostly in coastal and sheltered areas. (Neori et., 2000; Neori and Shpigel, 2003). Aquaculture effluent discharged directly to the open-water or seawater without treatment more high possibility on negative impact to the environment including discharge of excessive use of chemical compound such as drugs and antibiotics, sedimentation, and others. Uneaten feed and fish feaces are major sources of waste
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There are many type of seaweed have been cultured around the world including Eucheuma, Kappaphycus, Gracilaria,Gelidium and Caulerpa (Troell, 2009). In general, seaweed can classified into three types which is brown seaweed, red seaweed and green seaweed. Brown seaweed have large in size and range of the giant kelp is often 20 m long but red seaweed and green seaweed have similar size that small than brown seaweed. Red seaweed have various colour not red only, they are sometimes brownish red and purple (FAO, 2003). Seaweed also can be classified with their most content that is agarophyte, alginophyte, and
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