Sustainability| Risk assessment from exposure to chemical substances from tsunami contaminated sludge, and a regional regeneration project, understanding the state of chemical contamination from contaminated sludge, future predictions and proposals for soil repair.- MITSUI& CO., LTD.
Proposals for producing hydrogen from sewage sludge include a method that uses supercritical water, and a method where digestion gas is generated from anaerobic fermentation, which causes a water steam reforming/water gas shift reaction.
Biogas Biogas Biogas is a combustible gas derived by methane fermentation of anaerobic microorganisms in organic waste such as raw garbage, livestock manure and sewage sludge. The principal components of biogas are methane and carbon dioxide.
In line with the application on radiation technology for environmental protection, IAEA has taken a lead role in promoting and supporting projects related to the use of electron beam or gamma radiation for flue gas, waste water and sludge treatment.
Besides, the fuel obtained from wastewater sludge is a carbon-neutral product. Therefore, by using it in a power generation plant as an alternative to coal, it is possible to drastically decrease CO2 emissions derived from fossil fuels.
Japan Bio Methane Inc.(JBM) is planning and implementing a business model for a biogas to power generation business that mainly uses food waste, organic industrial waste, livestock waste, and sewage sludge.
The use of this process enables the maintenance of treated water of consistent quality and a reduction in the amount of sludge generated by up to 75% compared to the standard aerobic biological treatment process.
Integrating a sludge conditioning tank, a novel idea, has enabled high capture rates of solid contents to be obtained, and tremendously enhanced sludge treatment efficiency.
The sludge dryer Solapy dries dewatered cake with a water content of 83% discharged from the sludge dewatering press into dried sludge with a water content of about 10 to 40%, thus reducing the amount of sludge to be disposed of.
There are also inorganic coagulants that can be used in all wastewater treatment processes such as sludge dewatering, dissolved-air flotation and chemically precipitation.
Data on the sludge property and sedimentation property are collected and operational improvements are proposed based on the collected data to achieve more effective operational services.
The fire is believed to have occurred when rubber coagulum in sludge was exposed to direct sunlight for an extended period of time, and eventually ignited due to chemical decomposition and the build-up of heat.
A sand washing system with a mixer washes out the sludge component in filter sand that is discharged from a filter and sorts particles out in a coherent manner.
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