A large amount of solid waste is generated due to the rapid growth of population, industrial and economic activities. When not properly handled, these wastes may bring negative effects to the environment, especially on leachate. Leachate is considered the greatest environmental concern in solid waste management. Leachate contains highly contaminated and hazardous substances and if left untreated, it will end up mixing with the surface and groundwater.
Generally, leachate is treated via biological, chemical, or physical methods, the suitability of which depends on the quality of the leachate. Coagulation-flocculation is one of the effective treatment methods of leachate. The performance of the coagulation process depends on the type of coagulant used and the characteristics of the liquid to be treated. A coagulant can be natural or chemical, where aluminium chloride, ferric chloride, polyaluminium chloride and ferrous sulfate are the most common.
To date, researchers are still searching for the optimal conditions in coagulation-flocculation processes. New coagulants are also being developed. Recently, there has been interest in developing composite coagulant to enhance coagulant abilities. Therefore, the papers of this special issue will address research on applications of coagulation flocculation processes in landfill leachate treatment.
Suitable topics include, but are not limited to, the following:
- Types of coagulant and flocculants-chemical, natural, combination
- Novel coagulant and coagulant aids
- Combination of coagulation-flocculation process with other treatment methods
- Mechanism and behaviour
- Cost implications
- Biodegradability improvement
- Influence on leachate compositions
- Pre and post coagulation-flocculation processes
- Chemical reactions and mass balance
- Optimisation, modelling and computation
- Other related topics of coagulation-flocculation in landfill leachate treatment
Submission of manuscripts: 31 March 2017
Notification to authors: 31 June 2017
Final versions due: 31 October 2017