Page 300 - Trends in Science and Technology fo Sustainable Living

Trends in Science and Technology 261
for Sustainable Living

conditions. Because the heterotrophic substrate’s microbial growth
rate and production per unit is 10 times larger in bioflocs than in
autotrophic nitrifying bacteria, hazardous nitrogen species are
immobilized more quickly. This method is based on the flocculation
principle in the system (Figure 1).

Sumber: Avnimelech, 2014

Figure 1. Scheme of The Biofloc Technology System (BFT)

2. The Rise of Biofloc Technology
Avnimelech (2014) provided the following year-by-year
summary of the technological advances shift from conventional
aquaculture to bioflocs:
a. 1960s period:
During this period, communities used conventional
aquaculture systems for years before biofloc technology to
raise fish and other aquatic organisms. Conventional system
aquaculture is the dominant method of cultivating fish and other
aquatic organisms. This system places fish or aquatic organisms in
ponds or containers, usually filled with uncirculated water. The food
given to the fish will produce waste, including uneaten food and fish
excrement. This waste can cause the accumulation of substances
harmful to fish and the surrounding environment. Before biofloc
technology, communities have utilized conventional aquaculture
techniques to cultivate fish and other aquatic species for years.
Conventional system aquaculture is the most common way of