Defence Research Development Organization, DRDO will soon equip around one thousand passenger trains with bio-digesters to solve human waste disposal problem. DRDO Chief Controller William Selvamurthy told reporters in New Delhi that the technology developed is being used to decompose biological waste generated by soldiers deployed in high-altitude regions such as Siachen and Ladakh. Mr. Selvamurthy added that the pilot project to install bio-digesters in trains has been completed successfully. He also said that all necessary modifications have been made as per Railways requirement and soon the technology will be implemented on a mass scale in coming days. Our correspondent reports that the technology has been developed in the Gwalior based DRDO lab wherein a special form of bacteria is used to treat human waste in zero discharge toilets. Keeping in mind the specific requirements of passenger trains, Railways and DRDO have already signed an MoU to co-develop these bio-digesters to keep railway tracks clean.