This paper aimed to evaluate the effectiveness of a device to remove scum from the inner part of gas-liquid-solid separators of a full-scale upflow anaerobic sludge blanket reactor treating domestic sewage, as well as determining the scum yield coefficient for different reactors’ operating conditions. The experiments were carried out at the Laboreaux sewage treatment plant (Itabira, Minas Gerais, Brazil) and the effectiveness of the scum removal device was fully demonstrated, with median efficiencies ranging from 65 to 90%. The average scum yield varied from 6.8 to 14.6 mL of scum formed per kg COD applied.
Decentralized sanitation facilities like pit latrines, conservancy tanks, septic tanks or even decentralized wastewater treatment plants accumulating organic sludge hazardous to ground water resources and public health. Many municipalities around the world are challenged with the collection and environmental disposal of this urban sewage sludge or so called septage. The paper presents the frame condition and challenges of septage disposal in Indonesia and introduces a new treatment system with up to 4 years operational experiences of two running projects.
The presented projects are located in Mojokerto (East Java) and in Banda Ache (West Sumatra) and serving a catchment area of more than 100,000 households.
The treatment system has been developed by the German NGO BORDA in 2004 as a complementary DEWATS (decentralized wastewater treatment system) component for the disposal and processing of urban septage.
The system is modular and the treatment components are compiled according to the project requirements and after 4 years operation has been proven the developed technical conception and features as follows:– Robust and low maintenance requiring system– No electric energy required– It can treat and can be adapted to various types of septage– No or minimal odor emission which allows installation close to residential areas or in industrial areas– Production of sellable fertilizer– Land requirement 60-75 m2 per m3 septage per day– Operational cost 1.5 USD per m3
Facts, experiences and technical designs are presented and explained in the paper.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.