Cornerstone - Spring 2014 - (Page 78)
S O C IE T Y & C U LT U R E
Communities to Clean Water
By Okty Damayanti
Chairperson, Adaro Foundation
GM, CSR Division
T Adaro Indonesia is working to become a leading
Indonesian-based mining and energy group. To achieve
this goal Adaro recognizes that it is essential to balance
economic, environmental, and social considerations in all its
activities and has instituted a Corporate Social Responsibility
(CSR) program. Through proper engagement with stakeholders
and careful evaluation of local needs, mining operations can
have positive, significant impacts on the community near the
mine that extend beyond the anticipated economic benefits.
A major concern for many areas in Indonesia is a lack of access
to reliable, clean water. Many homes are not equipped with
plumbing, so residents rely on wells or natural bodies of
water, such as rivers. Unfortunately, natural bodies of water
are not always dependable due to precipitation patterns. For
instance, Kalimantan (Borneo) island has an equatorial climate
characterized by wet and dry seasons which have remarkable
disparity in precipitation.
This disparity and the related difficulties for the local community offer an opportunity for Adaro to deliver a positive impact.
Adaro has opted to capture excess water and process it so it
is suitable for use internally as well as by the local community.
In this project Adaro has adopted the 3R principle-reduce,
reuse, recycle-with regards to wastewater reutilization.
"A major concern for many areas
in Indonesia is a lack of access to
reliable, clean water."
In one of Adaro's mines, rainwater accumulates in the pit
sump (the area in the bottom of the open pit to collect surface
runoff) together with the water generated by pit dewatering
activities. This provides the mine with an abundant water supply year-round. The water collected in the sump is pumped
out into a drainage system at volumes up to 300,000 m3/hr.
The water must be pumped out continually to allow mining
operation to continue. In the first step of the recycling process,
excess water is moved to a series of settling ponds to allow the
majority of suspended solids to settle and then small amounts
of flocculant/coagulant agents are added as a final treatment
to encourage further settling.
At this stage, the purpose of the treatment is to ensure that
the water in the settling ponds meets the quality standard
stipulated by national and provincial governments before
being released to public water channels.
CONVERTING MINE WATER INTO POTABLE WATER
Not all of the water from settling ponds is released to the
environment; a portion of it is further processed to meet the
government's quality standard for clean, potable water. This
secondary treatment occurs at Adaro's T-300 Water Treatment
Plant (WTP), which was built in the Tutupan area in 2008.
Adaro's water treatment plant provides clean, reliable water
to local communities.
Several processing steps are required at the T-300 WTP. The
first step utilizes another settling pond to ensure that the
water has a neutral pH. Any remaining suspended particles
Table of Contents for the Digital Edition of Cornerstone - Spring 2014
From the Editor: Water Crisis Calls for Common Action
Cover Story: Reducing Energy’s Water Footprint: Driving a Sustainable Energy Future
Thirsty Energy: Integrated Energy-Water
Planning for a Sustainable Future
Exploring Global Energy Challenges: Exclusive Interview with Nobuo Tanaka
Advancing China’s Coal Industry
What to Watch in 2014: Policy Developments
That Will Shape the Coal Industry
Identifying the Global Coal Industry’s Water Risks
Assessing Water Issues in China’s Coal Industry
Coal-Based Electricity Generation in India
Considering Emissions From Amine-Based
CO2 Capture Before Deployment
Exploring the Possibilities: The NETL Power Plant Water Program
Advanced Cooling Technologies for Water Savings at Coal-Fired Power Plants
Water-Saving FGD Technologies
Supplying Water to Power Plants with Desalination Technology
Moving Coal Up the Value Chain
Turning a Liability into an Asset
Connecting Indonesian Communities to Clean Water
Cornerstone - Spring 2014