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Continuous Effluent/Emission
Monitoring Systems (CEMS) of
Industries
B. R. Naidu
Director
Central Pollution Control Board
Vadodara
February 24, 2018
CEMS (Continuous Emission/Effluent Monitoring System)
The system composed of Equipment, Instrument to draw,
condition, analyze the flue gas sample/wastewater and
provide permanent record of emissions/discharge or process
control parameters continuously at real time basis is called
Continuous Emission/Effluent Monitoring System (CEMS)
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Benefits of CEMS
� Provides real time data.
� Remotely accessible to operator/regulator.
� Greater transparency in monitoring of performance.
� Continuous performance check of Air Pollution Control Devices /
treatment methods of wastewater and optimization of resources used.
� Time series analysis possible with continuous data.
� Reduction in regulatory visits as well as long term monitoring cost.
� Expected better compliance through self regulation by industry hence
lower emission.
Diagram of Continuous Effluent Monitoring Station and data transmission system
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DIRECTIONS ISSUED BY CPCB to all SPCBs/ PCCs under Section 18 (1)(b) of Water Act and Air Act
Date of issue:
February 05, 2014
Target Date:
March 31, 2015
Target date extended to:
June 30, 2015
CPCB ISSUED DIRECTIONS to defaulting Industries (17 Category) under Section 5 of E P Act: after June 2015
DIRECTIONS ISSUED ON 05-02-2014
a. To Install online continuous Stack Emission Monitoring Systems
(CSEMS) in 17 categories of highly polluting industries and in
Common Hazardous waste and Biomedical waste incinerators for
the parameters(industry/sector specific parameter) specified
by CPCB; not later than by March 31,2015;
b. To install online effluent quality monitoring system at the outlet
of effluent treatment plants of the 17 category industries and in
CETPs for the measurement of the parameters(industry/sector
specific parameter) like flow, pH, COD, BOD, TSS and other
specified parameters specified by CPCB; not later than by March31, 2015;
DIRECTIONS ISSUED ON 05-02-2014
Contd..
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c. To connect and upload the online emission and effluent monitoring
data at SPCBs/PCCs and CPCB server in a time bound manner but not
later than by March 31,2015;
d. To ensure regular maintenance and operation of the online system
with tamper proof mechanism having facilities for online calibration;
e. To submit bank guarantee of 25 % of the cost of online monitoring
systems (emission and effluent whichever applicable) for ensuring
timely installation of online monitoring systems within 90 days from
the date of receipt of directions issued by SPCBs/PCCs to the
industries;
Later on the same directions were issued for installation of CEMS and
data submission for Grossly Polluting Industries (GPI) on River Ganga
basin viz., Textile, Dairy, Slaughter House etc.
DIRECTIONS ISSUED ON 05-02-2014
Contd..
� All 17 Category of industries has
to monitor effluent parameters
except Cement industries
� pH, BOD, COD, TSS are common
parameters to be monitored by
most category of industries
� Flow meter has to be installed
by all category of industries for
monitoring effluent discharged.
� CCTV camera has to be
installed by all ZLD units and
units discharging Effluent to
CETP and the video feed of the
those cameras hat to be
submitted to CPCB
List of Parameter for Continuous Monitoring as per CPCB Guidelines
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Real-time data from Industries- Initiation & Challenges Faced
Heterogeneous Systems: � Multiple instruments
� Multiple instrument suppliers
� Multiple Data formats
� Multiple platforms
� Multiple Communication protocols
� Correctness of Data transmitted ?????
� Data collection from heterogeneous systems
Approach adopted by CPCB for data collection from CEMS
In order to overcome the heterogeneity of the systems different
Instrument Suppliers (IS) were allowed to install their physical
servers (Govt. data on Cloud was not allowed) in CPCB and asked to
fetch the data from all their installations and display real-time data
in their respective web-portal
(Now with change in policy, servers of private suppliers are removed
and is switched to cloud based system)
S1, S2, S3…S1, S2, S3…S1, S2, S3…S1, S2, S3…SnSnSnSn
Server AServer AServer AServer A
S1, S2, S3…S1, S2, S3…S1, S2, S3…S1, S2, S3…SnSnSnSn
Server Server Server Server
BBBB
S1, S2, S3…S1, S2, S3…S1, S2, S3…S1, S2, S3…SnSnSnSn
Server Server Server Server
CCCC
IS WebIS WebIS WebIS Web----portalportalportalportal IS WebIS WebIS WebIS Web----portalportalportalportalIS WebIS WebIS WebIS Web----portalportalportalportal
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Scenario: Post Directions issued
The number of industries installed and started transmitting data
gradually increased post directions issues. The following table
shows the total number of industries integrated data with CPCB
Server since 2010:
YearYearYearYear No.No.No.No. ofofofof industries transmitting industries transmitting industries transmitting industries transmitting
data from CEMSdata from CEMSdata from CEMSdata from CEMS
No. of serversNo. of serversNo. of serversNo. of servers
installedinstalledinstalledinstalled
2010-11 10 2
2011-12 17 4
2012-13 100 6
2013-14 (Direction issued) 150 8
2014-15 200 11
2015-16 1800 36
2016-17 2240 42
All IS (Technology Provider) servers are shifted to cloud servers and there are no
physical servers installed at CPCB now
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CPCB Central Portal for CEMS data
� Data was available in many IS
servers and in different formats.
� Access of data from different
servers/portals was herculean task
� CPCB has developed the common
software which gets data from all
instrument suppliers’ server and
can be access at its Central Portal.
� Officials of CPCB and SPCB has
access to this central portal
� Data on single platform may be
used for compliance verification
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CPCB Policy for Real Time CEMS data collection
CPCB has defined data submission policy for Industry, Instrument Supplier
(Technology Provider) and SPCB
Data Policy for Industry:
� Industry has to make arrangement of data submission through IS which are
submitting data to CPCB as per CPCB laid down requirements
� Sole responsibility of real time data submission to CPCB lies with the industry.
Industry has to ensure that data is received at CPCB portal on real time basis
without any interruption and if interruption are observed, IS should be
immediately informed and corrective action have to be taken by industry and IS.
� Each industry has to ensure 85% of data availability
� Industry can migrate to one IS to other while it has to ensure:• All previous is migrated to new IS server
• Migration information is shared with CPCB along with data details
• New IS follows the CPCB requirements/procedures
Data Policy for Instrument Supplier (Technology Provider):
� CPCB does not register any agency as IS/Technology Provider. Any firm
either instrument supplier or combination of instrument supplier and
software developer can become a Technology provider an submit data to
CPCB on behalf of any industry, but as per CPCB requirements/formats
� Ownership of real time online continuous emission/effluent monitoring
station data collected at the server of IS/technology provider lies with
CPCB & SPCB
� Once an industry started data submission through any one of the
IS/technology provider, it is the responsibility of IS/technology provider to
collect, display and forward the data to CPCB Central Portal and SPCB’s or
any other portal without delay
� IS/technology provider will not charge any additional cost to the industry
for transferring this data to any other Govt. Agency or SPCB etc.
CPCB Policy for Real Time CEMS data collection contd…
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CPCB Policy for Real Time CEMS data collection contd…
Data Policy for SPCB:
� SPCB should obtain real time data from various portals of Is/Technology
Providers, which are operating round the clock and should build their own
Real Time Data Management System within their jurisdiction. But data to
CPCB should remain uninterrupted and patters in which data is being sought
shall not be altered.
� SPCB may enhance their ambit by covering other categories of industries in
their jurisdiction where such real time systems may prove useful.
� If any SPCB need to have additional information in the data submitted by
the industries, may communicate with CPCB and CPCB will incorporate the
same on mutual discussion, This may avoid multiple instructions to an
industry.
CPCB Industry Registration Portal
� Complete Inventory of industries
(17 categories) was not available at
CPCB
� Registration portal was developed
and is available at CPCB web-site
for industries to submit the details
� More than 4000 industries has
registered and submitted details
Registration portal
http://cpcbrtdms.nic.in/cpcbIndustry
Registration/
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SMS Alert generation
� SMS alert generation was implemented
on exceeding of prescribed standards.
� SMS & E-mail Alerts are sent to
concerned industry official for taking
corrective action
� Same alerts are sent to concerned
officials of CPCB
� Industries can respond to CPCB at the
e-mail id mentioned in SMS alert
� Most violating industries (based on
number of SMSs) are inspected by
respective RD
Challenges faced in implementing DATA Collection Mechanism
1. Details of parameters to be monitored at each stack level is not
available – parameters to be monitored may change with process
with which the stack is attached
2. There is no match between data (results) of manual monitoring
carried out by CPCB and the data of CEMS
3. Overlapping of Sector Example: Captive Power Plant in some of the industries (Steel) are being
treated as separate unit and hence difficulty in follow up with SMS alerts
4. Applying Standards for SMS Alerts� Standards vary w.r.t. fuel type, fuel ratio etc.
� Flow (many do not have totalizer installed)
� Non Uniformity in following standard by SPCBs
� Date of commissioning of the plant