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Abstract
Farming, catching and processing seafood is an important economic sector in Vietnam. For exporting seafood processing products to foreign countries, it is not only necessary to produce clean technology, but also to minimize environmental pollution from production stages, to ensure that wastewater meets standards. The characteristics of the seafood processing industry are very high nitrogen and phosphorus, difficult to treat with conventional measures. The traditional ammonium treatment technology is based on a combination of two processes, nitrate and nitrification. Nitrogen treatment in this way requires a large area that is not always responsive.
This paper deals with the treatment of nitrogen in wastewater discharged after anaerobic treatment by SNAP. Specifi cally, we found the COD/N ratio, pH value, suitable input load for processing fishery waste water. Anaerobic digested waste water of Cuu Long An Giang Fisheries Import and Export Joint Stock Company was used to operate the treatment model. At the same time, by using two types of substrate is coconut fiber and synthetic fiber to make increase microorganism adhesion, optimal effect of the types was found and can be applied in practice.