HORTICULTURE

Detailed explanation-1: -The main limits of biodegradation processes are the limited time for adaptation to the xenobiotics, the very low xenobio-tics concentration in the influent, the competition with abiotic removal mechanisms, the limited avail-ability of external substrates for cometabolism, and the intrinsic nonbiodegradability.

Detailed explanation-2: -Factors that affect bioremediation directly are temperature, electron donors (as source of energy), pH, nutrients electron acceptors, and inhibitory metabolites or substrates (77).

Detailed explanation-3: -The bioremediation process may take anywhere from several months to several years to complete, depending on variables such as the size of the contaminated area, the concentration of contaminants, temperature, soil density, and whether bioremediation will occur in situ or ex situ.