On the other side, in general, liquid wastes produced by food industry have
high contents of organic pollutants including biochemical oxygen demand, ammonia,
suspended solids, oils and greases and are commonly acid, biodegradable, and
malodorous (Environmental Protection Agency, 2000). When an unstable organic
waste in liquid, slurry, or sludge starts decomposing, gases are liberated and accumulate
in fl uid solution phase, until the saturation of the liquid is reached; beyond
this point, smelly vapors are released.