Municipal Sludge Treatment Plant, DEWATS, Borda

1. MSTP |
Municipal Sludge
Decentralized Wastewater Treatment Plant
Treatment Solutions
An innovative solution to cope
with the problem of septage
sludge disposal and treatment
within a decentralized
sanitation approach
MSTP |
DEWATS Service Package
Developed and disseminated by
BORDA & BORDA BNS Network

2. Improper disposal of urban sanitation sludge spreads
deadly infections at alarming rates
A challenge to sanitation Improper disposal of sludge BORDA BNS Networks Mission
Improved sanitation still remains an All on-site treatment facilities, inclu- With a mission to improve the liveli-
important challenge to the Millen- ding septic tanks and open pit la- hoods of disadvantaged groups
nium Development Goals, which aim trines, require regular removal of within societies and to sustain the
to greatly alleviate conditions for the sludge. The removal of this potenti- functioning of eco-systems through
World’s impoverished people. In ma- ally valuable waste is often neglected dissemination of demand oriented
ny dense urban areas there already causing dangerous overflow or im- Basic Needs Services (BNS), BORDA
exists sanitation facilities, but they proper disposal into water supplies. (Bremen Overseas Research and
can be neglected and poorly main- The results can be deadly through Development Association) and its
tained without a central disposal site. the rapid spread of cholera, worm BNS Partner Network develop and
The results are sanitation systems infestations, hepatitis, and diarrhoeal disseminate innovative solutions for
that fail to safely dispose of sanita- diseases. On-site desludging is not facilitating the access to BNS.
tion sludge because of inadequate or an option in areas of dense popula-
inefficient infrastructure. This endan- tions and scarce land - a common
gers public health and pollutes the situation in slum areas outside the
environment. A recent UN report reach of centralized sanitation
estimates 15% of basic sanitation fa- systems.
cilities lack proper separation of hu- Proper disposal of septage sludge is
man waste from human contact. The not promoted and existing treatment
consequences are sanitation facilities facilities lack adequate capacities
become a transmitter of infectious
diseases and environmental pollu-
tion, a direct contradiction of their
original purpose.
Neglected maintenance contradicts original
intentions and design of sanitary facilities
DEWATS Service Packages
One Basic Needs Service is DEWATS,
an effective, efficient, affordable and
proven wastewater treatment solu-
tion for (sub-) tropical regions and
Open disposal can overflow in heavy rains
causing runaway spread of diseases low-income countries. DEWATS
stands for “Decentralized Wastewater
Treatment Solutions”, but it is much
Sustainable sanitation, long-term more than just a technical approach.
Disposal of sludge into water supplies is action DEWATS Service Packages include
increasing infection and pollution rates
According to BORDA, “What cannot not simply the construction of hard-
be sustained should not be built.” ware but a whole set of integrated
Gaps in centralized sanitation DEWATS municipal systems for measures which are combined accor-
Currently, 95% of worldwide waste- sludge treatment innovatively and ding to demand. The Sludge Treat-
water in is discharged, is insuffi- efficiently dispose of on-site sludge ment Plant (STP) is one of these
ciently treated or completely un- by using sustainable mechanical and DEWATS Service Packages that aims
treated. The majority of residential biological treatment modules without to improve the sanitation conditions
areas and new real estate com- electrical energy, chemicals, and in small to medium sized cities by
plexes, mostly in developing coun- imported materials. providing a central location for
tries, rely on septic tanks and other sludge treatment and disposal.
decentralized systems.

3. DEWATS STP efficiently treats sludge from many
decentralized sanitation facilities
DEWATS Municipal Sludge areas where centralized sanitation o The biological treatment of waste-
Treatment Plants systems do not serve water without technical energy in-
As with other DEWATS solutions, a o Allows on-site waste to be dis- puts by DEWATS applications
Sludge Treatment Plant is designed posed of properly and on-time makes wastewater meet environ-
with innovative technology that can without unnecessary environmen- mental standards and advances
be built by local craftsmen and engi- tal degradation and human health the living conditions of densely po-
neers using locally available resour- risks pulated areas
ces. The municipal based STP is an o An open-system and demand
affordable solution for the regular based approach within the fiscal
maintenance of all onsite treatment reach of municipal governments
systems. This ensures the existence o The proper implementation of a
and sustainability of safe sanitation. locally-adaptable, central sludge
It enables cities to set up a regula- treatment facility includes the
tion framework and a management option for compost packaging and
plan for decentralized sanitation at biogas generation
their own pace.
Resulting benefits
Key MSTP features These measures which are coordina-
DEWATS MSTP is an efficient and ted by BORDA’s regional offices and
final treatment solution for sludge implemented with local BORDA BNS
waste that utilises sustainable and Partner Organizations provide a mul-
adaptable technology to implement tiplicity of benefits:
the following key features: o An expandable solution to sanita-
o Low investment and operation tion challenges by providing a final Investment costs are low because DEWATS
MSTP is designed with locally available materials
costs treatment facility to dispose high and built by local craftsmen and engineers.
o The high load capacity and efficient loads of sludge
design allows DEWATS MSTP to ac- o The reduction of transmittable di-
commodate the demands of small seases and unsanitary conditions
to medium cities at a low invest- through routine and proper main-
ment cost tenance of on-site sanitation facili-
o The municipal-based sludge treat- ties
ment plant can accommodate high
loads of organic industrial waste as
well as septic sludge from residen-
tial septic tanks, open pit latrines,
and other DEWATS CBS solutions
o The construction of a central
sludge treatment plant fills gaps in
Long-lasting design and non-sophisticated
maintenance allows for continual operation

4. DEWATS STP - a proven solution
Additional benefits Sanitation Mapping Today, BORDA and its BNS Partner
o The biogas that is generated Locating decentralized sanitation fa- Network, have already achieved the
during sludge treatment is cilities and solid waste dumps has sustainable operation of more than
captured and can be used for been made easier with the sanitation 900 DEWATS solutions. This demon-
lighting, cooking or water heating. mapping soft-ware, DEWATS strates that DEWATS Sludge Treat-
o Compost is a naturally occurring SanMap. It allows local governments ment Plant is a proven and affordable
and beneficial fertilizer produced to systematically collate and analyse solution to combat sanitation grie-
through the treatment process that available data on the local sanitation vances in small to medium cities.
can be distributed directly to farms situation. Using this tool helps them STP costs around $100.000 USD de-
o Non-sophisticated maintenance to develop plans for up-grading mu- pending on the load capacity and re-
allows for continual operation and nicipal STP’s and sanitation infra- gional conditions. Implementations
low operational costs structure. are found in Aceh and Mojokerto
Municipalities in Indonesia.
A proven solution
For over 10 years BORDA has led the
way in innovative sanitation facilities.
Municipal Sludge
Treatment Plant
Left: Biogas tank Above: Sludge stabilization
and separation tank
DEWATS Service Packages
o Treatment Systems o Emergency Sanitation o Health Impact Assessment &
o Community Based Sanitation o Sanitation for Prisons Hygiene Education
o School Based Sanitation o Sanitation for Real Estates o Capacity Development
o Sanitation for Hospitals & Hotels o Sanitation Mapping o Standardisation
o Wastewater Treatment for Agro-Industry o Municipal Sludge Treatment Plant o Research & Development
DEWATS – Decentralized Wastewater Treatment Solutions
Developed & disseminated by BORDA and over 20 BORDA BNS Network Partners in South and South East Asia & Southern Africa
With support from:
Bremen Overseas Research and Development Association 02MSTP_Okt2010_HBV3
BORDA Germany BORDA South East Asia BORDA South Asia BORDA SADC
Head Office Programme Office Programme Office India Programme Office
fon: + 49 - 421-137 18 Indonesia fon: + 91 - 80 41 52 75 54
e-mail: office@borda-net.org fon: + 62 - 274 88 82 73 e-mail: fon: + 255 – 22 2600 234
www.borda-net.org e-mail: yogya@borda-sea.org bangalore@borda-sa.org e-mail: dar@borda-sadc.org