Oyem H. H.

Heavy Metals Sludge from Septic Tank Sewage: Implication for Use as Fertilizer

Sludge contains nutrients, heavy metals, and metalloids some of which are essential macronutrients, such as N, P, K, Ca, Mn and other essential trace elements, such as Cu, Fe and Zn. This paper examines the heavy metals within the septic tank system and their eventual accumulation as components of sludge with implication for agricultural use. Sl...