Improved and promising fecal sludge sanitizing methods: treatment of fecal sludge using resource recovery technologies

Abstract

The global challenges that face sustainable sanitation services in developing countries are the lack of fecal sludge (FS) management; this is due to the rapid urbanization and population growth as it generates enormous quantities of fecal sludge. The extensive use of unimproved sanitation technologies is one of the main reasons for environmental and public health concerns. In dispersed rural areas, isolated slums or in urban areas where a sewerage system is costly, a decentralized wastewater system can be used. Therefore centralized management of decentralized wastewater systems along with proper institutional framework treatment of fecal sludge can be used to enhance the economies of developing countries from resource recovery. The discovery of new ways to inactivate pathogens contained in human waste is key in improving access to sanitation worldwide and reducing the impact of conventional waste management processes on the environment. The entire FS management system should include on-site sanitary treatment methods, collection, and transportation of FS, treatment facilities as well as resource recovery or disposal of the treated end products. This review paper addresses the hygienization of fecal sludge and improved treatment technologies for safe reuse or disposal of the end products and the significant economic revenues attained from the treatments of fecal sludge. HIGHLIGHTS The use of resource recovery technology for fecal sludge treatment.; Onsite treatment of fecal sludge.; Effective and promising treatment of fecal sludge with improved technologies.; The applicability of fecal sludge for soil enhancement for crop production.; How to recover resource from sludge.;

Keywords

• fecal sludge
• lactic acid treatment
• lime treatment
• solar septic tank
• volatile fatty acid treatment