Candidature of pre-catalysis for enhanced biogas recovery from wastewater sludge in perspective of saudi arabia

The management of wastewater sludge is considered as one of the most significant environmental problems in the current scenario Anaerobic digestion is a competent treatment option for recycling of sludge as it provides a high energy recovery with little nuisances However the efficiency of this process in sludge is hindered due to the presence of complex organics rate limiting microbial flocs extracellular polymeric substances and various toxic compounds To overcome these rates limiting factors a pretreatment step can be applied prior to the anaerobic digestion process Photocatalysis is considered the most effective environmentally friendly and advanced oxidation technology that can be used as a pre treatment for sludge disintegration It is a promising option in the context of low energy requirement due to the use of solar light and high economic feasibility In the above context the present manuscript provides an overview regarding the potential of anaerobic digestion of wastewater sludge in special perspective of Saudi Arabia