The Central Pollution Control Board (CPCB) is a statutory organization whose principal functions, as spelt out in the Water (Prevention and Control of Pollution) Act, 1974, and the Air (Prevention and Control of Pollution) Act, 1981 is-
- To promote cleanliness of streams and wells in different areas of the States by prevention, control and abatement of water pollution.
- To improve the quality of air and to prevent, control or abate air pollution in the country. CPCB has an automatic monitoring station at ITO Intersection in New Delhi.
Central Pollution Control Board vide its letter No. B-29016/04/06PCI-1/5401 dated 05.02.2014 issued directions under section 18(1)b of the Water and Air Acts to the State Pollution Control Boards and Pollution Control Committees for directing the 17 categories of highly polluting industries such as Pulp & Paper, Distillery, Sugar, Tanneries, Power Plants, Cement, Oil Refineries, Fertilizer, Chloral Alkali Plants, Dye & Dye Intermediate Units, Pesticides and Pharma Sector, Common Effluent Treatment Plants (CETP) and STPs, Common Bio Medical Waste and Common Hazardous Waste Incinerators for installation of online effluent quality and common emission monitoring systems to help track the discharges of pollutants from these units.
The online continuous monitoring systems are guided by the two guidelines issues by the central pollution control board. The first guideline is for effluent monitoring and contains key guidelines for data uploading. The second document was a notification covering Air Quality Monitoring System(AQMS), Real Time Effluent Quality Monitoring System (RTEQMS) and Continouse Emission Monitoring System (CEMS). The third document if the FAQ released by CPCB. These three documents form the guidance document for CPCB compliance for online effluent monitoring system.
1. Data should be transferred as per the CPCB approved architecture for the Real Time Monitoring System guidelines http://cpcb.nic.in/FinalGuidelinse.pdf.
The key requirement of these guidelines is -:
- Clause 3.2 point 8 page 5 of CPCB Guidelines: No plant PC
- Clause 3.2 point 12 page 5 System memory (non-volatile) to record data for at-least one year of continuous operation.
- Clause 5.1 Page 19 second last point – Data transmission through different media like GPS, CDMA, Normal phone line, Datacards, Broadband, 3G etc. (at least any two media supported).
2 . Remote Calibration guidelines http://cpcb.nic.in/upload/Latest/Latest_105_Online_Monitoring_Protocol.pdf.
Key requirement of this guidelines is -:
1. Page 2 clause 5 (i): 100% Protocol Integration – This means that the the analyzers should have a digital port and integration should happen through it. Example for an analyzers that support MODBUS RTU, data should be acquired using this protocol and all process , calibration and diagnostic data should be integrated with the central platform.
2. Page 3 clause 5 (V): Remote calibration mechanism (except in case of PM, Effluent)
4. Revised parameter list http://cpcb.nic.in/Online/revised_parameter.pdf
This means that the data acquisition should happen through smart internet enabled gateways/data logger/station software (software running on the analyzer/analyzer PC) that acquires data directly from the analyzers using its digital protocol. They should poll the analyzers locally over a serial cable connected directly to the analyzer port (e.g. MODBUS RTU over RS485) or remotely over the LAN where analyzers are connected over a LAN (e.g. MODBUS TCP over Ethernet).
- Every unit is required to provide leased-line Internet facility to ensure data and information from the analysers is transmitted continuously without any time-delay.
- In case of non-availability of leased-line, a broadband connection may be installed, as a temporary arrangement. In no case data transmission through data card/ dongle is accepted.