Biological treatments focused on stabilizing and detoxifying olive mill wastewater facilitate agronomic reuse for irrigation fertilization. Anaerobic digestion is particularly attractive in view of energy recovery, but severely hampered by the microbial toxicity wastewater. In this work, addition biochar to mixture was studied improve stability efficiency anaerobic process. Kinetics yields biog...

The nitrification inhibitor, dicyandiamide (cyanoguanidine) (DCD), can improve fertilizer N efficiency; however, yield reductions and phytotoxicity from the use of DCD have been reported. A green­ house experiment was designed to determine the effect of DCD on growth, chlorophyll concentration and nutrient concentration of corn ( Zea mays L.), cotton ( Gossypium hirsutum L.), and grain sorghum ...

Herbicide residues have raised new concern since 1999 when damage to plants appeared to result from composted turf clippings (Bary et al. 2001; Rynk 2000). Other case reports of some incidents suggested that other unknown sources of phytotoxicity were present in composts used in gardens (Nielson 2003). Several plant bioassays have been reported to test composts for herbicide residues (SPU 2002;...