Technologies

Earth, Atmosphere & Environment Sciences

Title:	Arsenic Sludge Disposal Through Stabilization
Area:	Chemical Sciences, Earth, Atmosphere & Environment Sciences, Engineering Sciences
Focus Area:	Sludge Disposal
Social Benefits:	It provides safe disposal of arsenic contaminated sludge particularly obtained from arsenic removal water- treatment plants, Minimizes potential of arsenic to leach back to ground and mix with surface under-ground water through solidification/stabilization using portland cement, Minimizes the effect of arsenic poisoning in human body i.e arsenicosis, causes due to drinking of arsenic-rich water results in various health effects including skin cancer, diseases of the blood vessels of the legs and feet etc., Provides technically and economically efficient method towards safe landfill of arsenic contaminated water treatment sludge, Provides cost-effective, environmentally safe and easy to handle method of arsenic solidification / stabilization, Provides a long term, permanent treatment of arsenic contaminated sludge management, Manufactures usable construction materials like pavement blocks, concrete blocks etc, and consuming significant quantity of arsenic sludge for field application, Generation of employment through implementation of this new process for production of commercial items in different villages/municipalities, Application: Environmental (Clean Tech.) - Water treatment.
Developing Agency:	CSIR- Central Mechanical Engineering Research Institute (CMERI), West Bengal
Technology Readiness Index:	Technology Development
Email:	director@cmeri.res.in
Website Link :	http://www.cmeri.res.in
Source (more info) :	https://t.ly/l_sb

Brief Description

Description :

This process is for safe disposal of arsenic-rich sludge generated from arsenic removal plants. In these plants, large quantity of sludge is generated which contains about 5-7 kg. of arsenic per cubic meter of sludge. This sludge is hazardous as per the Resource Conservancy and Recovery Act (RCRA) of USEPA and it contains arsenic much above the permissible standard (0.2 g./m3) for its direct disposal into the inland water environment (CPCB-MEF, GoI, 1995-1996) as it has very high leaching potential. Arsenic contamination in groundwater and its consequences to the human health have been reported as one of the world's biggest natural groundwater calamities known to mankind. This process is designed for stabilization of arsenic contaminated water treatment sludge for its environmental safe disposal and converting it into products having commercial uses like bricks, concrete blocks, pavement tiles etc. It is very practicable, economical and long lasting. The solidified products meet the specified strength requirement for use in civil construction works and leaching of arsenic is far below the permissible limit.