These days, tackling wet waste is on the prime agenda of most city administrators. Various positive steps have been initiated by civic bodies that include segregating of wet waste at the housing society level. That’s because wet waste, left to the natural elements, takes around 30 days to complete the process of degeneration into composites.
However, the Bruhat Bengaluru Mahanagara Palike (BBMP) has introduced ERS technology that can process wet waste in just two to four hours! Yes, you heard it right.
According to a release, the technology has been provided by Indo-Japanese joint venture JERS Environment Technologies Pvt Ltd. The technology installed by JERS can process 400 kg of wet waste in one cycle. In fact, the same plant can process up to 4 tonnes of waste.
The technology is housed in a high-speed aerobic waste-processing machine at the BBMP Solid Waste Processing Centre in Koramangala. Wet waste — such as vegetable waste from households and restaurants, slaughterhouse waste and sewage waste — is converted into compost in an aerobic process using indigenous bacteria and fungi under vacuum in a low-pressure environment at 60 degrees Celsius, by allowing steam into the vault. Locally available microbes are used to quicken the process.
The machine can be also used in other industries that generate a large amount of wet waste, such as slaughterhouses and fisheries. The plant processes 400 kg in one cycle. The temperature and moisture removal can be controlled externally, depending on the nature of the waste being processed. The end products are compost and the non-biodegradable part of the waste.
Each batch requires two hours for processing, after which the compost is allowed to cool for up to 18 hours. The unit will be receiving waste for processing from the Koramangala ward on a trial basis. An ERS unit with the capacity to process 50 tonnes will cost about Rs 17 crore.
Once processed, the end products are compost and the non-biodegradable part of the waste (like plastic bags or un-segregated dry waste along with fibrous material like paper), which can be incinerated