Waste water treatment and sewage slugde management in Veneto: the role of int...francesco loro
The management of sewage slude is a challenge and an opportunity. the Integratet plant , WWTP - Anaerobic digestion - Composting is a way to solve this problem
Zero liquid discharge (ZLD) is a wastewater management technique that eliminates liquid waste discharge going outside of operating plants. This has attracted renewed interest worldwide in recent years.
Waste water treatment and sewage slugde management in Veneto: the role of int...francesco loro
The management of sewage slude is a challenge and an opportunity. the Integratet plant , WWTP - Anaerobic digestion - Composting is a way to solve this problem
Zero liquid discharge (ZLD) is a wastewater management technique that eliminates liquid waste discharge going outside of operating plants. This has attracted renewed interest worldwide in recent years.
Do not include any personal information as all posted material on this site is considered to be part of a public record as defined by section 27 of the Municipal Freedom of Information and Protection of Privacy Act.
We reserve the right to remove inappropriate comments. Please see Terms of Use for City of Toronto Social Media Sites at http://www.toronto.ca/e-updates/termsofuse.htm.
When I first started researching into Zero Liquid Discharge (ZLD), I found out that there no compact guides for this process online. This is how the idea for a ZLD booklet was born. This
rough guide is meant to help you understand the basics and to decide what’s best for your Brine Treatment case. Our Team in Lenntech B.V. will be happy to help you out with the details
and to find the best available options that will decrease the cost and increase the efficiency of
your project.
Christos Charisiadis
R&D engineer
christos@lenntech.com
September 2018
Zero Waste Residences through Resource Recovery & Circular EconomyKarnikaRoy2
This presentation is part of the Webinar hosted by ADDA in association with Saahas Zero Waste. The presentation aims to show the necessity for reducing waste and the correct Waste Management processes.
Kelvin Water Technologies offers complete thermal and non-thermal Zero Liquid Discharge solutions to manage tough-to-treat wastewaters. Kelvin's proprietary evaporators, brine concentrators, and crystallizers can help recover more than 95% of your wastewater while reducing the remaining brine as a product or solid. Kelvin's Siever total organic carbon (TOC) analyzers help control the quality of water to be reclaimed or recycled in semiconductor operations.
Case Study on Textile Waste Water treatment using ozone oxidation & micro-flocculation using ozone in primary stage.
Ozone is used to break complex organic & inorganic molecular bonds of color textile effluent. This significantly reduces use of chemical & sludge. Ozone retrofitting pay back is less than two years. Ozone works quite efficiently on reactive & organic dies to enhance present effluent treatment. Ozone with hydrogen peroxide or UV can offer advance oxidation.
presentation about the what is biogas, diffterent types of biogas plant, traditional vs modern, nisargruna biogas pant and detailed analysis about why to install biogas unit.
Do not include any personal information as all posted material on this site is considered to be part of a public record as defined by section 27 of the Municipal Freedom of Information and Protection of Privacy Act.
We reserve the right to remove inappropriate comments. Please see Terms of Use for City of Toronto Social Media Sites at http://www.toronto.ca/e-updates/termsofuse.htm.
When I first started researching into Zero Liquid Discharge (ZLD), I found out that there no compact guides for this process online. This is how the idea for a ZLD booklet was born. This
rough guide is meant to help you understand the basics and to decide what’s best for your Brine Treatment case. Our Team in Lenntech B.V. will be happy to help you out with the details
and to find the best available options that will decrease the cost and increase the efficiency of
your project.
Christos Charisiadis
R&D engineer
christos@lenntech.com
September 2018
Zero Waste Residences through Resource Recovery & Circular EconomyKarnikaRoy2
This presentation is part of the Webinar hosted by ADDA in association with Saahas Zero Waste. The presentation aims to show the necessity for reducing waste and the correct Waste Management processes.
Kelvin Water Technologies offers complete thermal and non-thermal Zero Liquid Discharge solutions to manage tough-to-treat wastewaters. Kelvin's proprietary evaporators, brine concentrators, and crystallizers can help recover more than 95% of your wastewater while reducing the remaining brine as a product or solid. Kelvin's Siever total organic carbon (TOC) analyzers help control the quality of water to be reclaimed or recycled in semiconductor operations.
Case Study on Textile Waste Water treatment using ozone oxidation & micro-flocculation using ozone in primary stage.
Ozone is used to break complex organic & inorganic molecular bonds of color textile effluent. This significantly reduces use of chemical & sludge. Ozone retrofitting pay back is less than two years. Ozone works quite efficiently on reactive & organic dies to enhance present effluent treatment. Ozone with hydrogen peroxide or UV can offer advance oxidation.
presentation about the what is biogas, diffterent types of biogas plant, traditional vs modern, nisargruna biogas pant and detailed analysis about why to install biogas unit.
Programa del curs d'actualització en terapèutica farmacològica i pràctica clínica per a residents de tercer any de la Unitat Docent Multiprofessional Barcelona Ciutat.
“Sustainability requires conservation of environmental resources, such as maintaining the quality of water resources, soil, air and forests; conservation of genetic diversity; and efficient use of energy, water and natural materials. Improving the efficiency of production mechanisms, in order to reduce the per capita consumption of natural resources and stimulate change in technologies and production of non-polluting consumption materials. All countries are over-invoked prevent environmental pollution through enforcement of environmental protection laws, promote technologies with low waste generation, and predict the impact of new technologies, products and wastes”.
The demand for efficient and cost effective wastewater treatment technology in the refining and petrochemical sector is being driven by not only ever-tightening environmental legislation, but also by the sectors own desire to follow a meaningful sustainability agenda and to take its responsibilities around product stewardship seriously.
Treatment of wastewater from petrochemical plants can be a challenging and costly matter; particularly when needing to comply with the requirements of operational permits and national environmental legislation governing the discharge of treated wastewater into community treatment plants or natural water bodies such as rivers, lakes and oceans.
Industrial waste water purification procedurepasindulaksara1
The effluent Treatment Plant (ETP) is a method that is used to treat the emanation coming out from many areas of the plant. It includes biological, physical, and chemical processes. It aims to releasing safe water into the environment to prevent it from getting cop0ntaminated. These plants are have been very useful in the process of providing clean water to the environment and have conserved water in a number of ways.
Biological Waste water Treatment Fundamentals and Recent developmentin Nutrie...PremBaboo4
A type of treatment that uses substances made from living organisms to treat waste and waste water. These substances may occur naturally in the body or may be made in the laboratory. Biological treatment is the sustainable treatment of waste. Biological treatment is an attractive and useful technology that results in the complete conversion of organic compounds into less harmful end products such as CO2 and H2O. It is considered low-cost and environmentally friendly compared to physical or chemical methods for removing contaminants without any harmful chemicals. The biological waste management technologies include composting, incineration, landfill, anaerobic digestion, and bioconversion to produce biofuels, i.e., bioethanol, biodiesel, biogas, methane production etc.
WASTE water treatment project........ Wastewater treatment is a process used to convert dirty wastewater into an effluent that can be returned to the water cycle with minimum impact on the environment, or directly reused. The latter is called water reclamation because treated wastewater can then be used for other purposes. The treatment process takes place in a wastewater treatment plant (WWTP), often referred to as a Water Resource Recovery Facility (WRRF) or a sewage treatment plant. Pollutants in municipal wastewater (households and small industries) are removed or broken down.
The treatment of wastewater is part of the overarching field of sanitation. Sanitation also includes the management of human waste and solid waste as well as stormwater (drainage) management.[1] By-products from wastewater treatment plants, such as screenings, grit and sewage sludge may also be treated in a wastewater treatment plant.[2]:Ch.14
2. Our story began in December 2008.
The ISTP2 (Independent Sewage Treatment Plant)
project is a BOOT project (build-own-operate-transfer)
which consists in the design, construction, financing
and operation of two wastewater treatment plants
in the Emirate of Abu Dhabi: Al Wathba 2 and Allahamah.
QATAR
SAUDI ARABIA OMAN
UNITED ARAB
EMIRATES
Abu Dhabi
Al Ain
IRAN
3. These plants, which were
commissioned in January 2012
for Al Wathba 2 and April 2013
for Allahamah, serve two
main purposes:
• To treat the growing amount
of wastewater produced
in Abu Dhabi and Al Ain
following the demographic
growth
• To recycle treated water for
irrigation of the green areas
(farms, parks, green spaces,
etc.) of Abu Dhabi and Al Ain.
The owner of these two plants
is Al Wathba Veolia Besix
Waste Water PJSC, a Special
Purpose Company which
was incorporated in 2008
for this specific project. It is
a joint-venture between the
government of Abu Dhabi,
represented by ADWEA, and
two private companies –
Veolia and Besix.
Facts&Figures
10,834m3
/h
25,000m3
/h
130,000m3
/day
300,000m3
/day
149,500m3
/day
345,000m3
/day
Average
flow
Average
flow
650,000(Al Ain)
1million(Abu Dhabi)
Population
equivalent
Population
equivalent
Tolerance
capacity
Tolerance
capacity
Peakflowto
pre-treatment
Peakflowto
pre-treatment
2.5
25
years for the design and
construction phases
years of operation
Contract duration
Allahamah plant: Water treatment capacity
Al Wathba 2 plant: Water treatment capacity
Quantityofsludgeproducedatfullcapacity:24,000kgDS/day(average)
Quantityofsludgeproducedatfullcapacity:32,000kgDS/day(average)
Allahamah
Al Wathba 2
6. Inlet Pumping Station
Submersible pumps lift the
sewage approx. 23m into the
headwork from where the
sewage gravitates through
the plants.
Preliminary Treatment
Fine screens remove all particles with a size larger than 6mm.
In the next step, sand, grit, stones and broken glass settle
down in the tanks. Lastly, surface skimmers remove oil and
grease from the sewage.
WaterStream
Primary Treatment
Veolia’s patented Multiflo™ treatment system removes
60 to 65% of suspended solids (SS) and 30 to 35% of the
BOD5
from the sewage. The collected sludge is continually
moved to the sludge treatment building.
7. Secondary Treatment
Removing the majority of BOD5 and
ammonia from the wastewater through
two processes:
Activated Sludge Process:
The activated sludge process is a biological
process that utilizes microorganisms to
convert organic and certain inorganic matter
from wastewater into cell mass. It aims
at removing dissolved organic matter and
nitrogen from the sewage. This is achieved
by the use of specific microorganisms which
operate in sequential aerobic and anoxic
conditions to eat up the organic matter
in the wastewater. Powerful turbo blowers
inject air in fine bubbles at the bottom of
the activated sludge tanks to expedite the
biological process by providing oxygen to
the microorganisms. The wastewater is then
passed to the de-aerator/ splitter tank, where
it is degasified by removing the air bubbles.
From there the wastewater is delivered to
the clarifiers.
Clarification:
Secondary clarifiers help to separate the
solids from the liquid phase of the mixed
liquor, and remove biological sludge from
the floor. The biological sludge is collected
at the bottom of the clarifiers and re-
circulated back to the inlet of the activated
sludge tanks. This stabilizes the concentration
of the microorganisms in the activated
sludge process.
Tertiary Treatment
The tertiary treatment ensures that
the effluent complies with regulatory
standards for irrigation purposes.
Dual media filters (pumice stone and
sand) are used for the filtration process.
Then, the water is disinfected by injecting
sodium hypochlorite produced on site.
Finally, the recycled water is pumped to a
reservoir with a capacity of 50,000m3
from
where it is distributed to consumers to be
used as water for irrigation purposes in Abu
Dhabi and Al Ain.
8. Thickening
Primary sludge coming from the
primary settlers and excess biological
sludge coming from the clarifiers
undergo a thickening process.
The water content of the sludge
is reduced by adding polymers.
SludgeStream
Anaerobic digestion
In the digesters, volatile organic matter
is reduced by utilizing anaerobic bacteria
in the absence of oxygen. The sludge is
fermented in digesters at a temperature
of approx. 36°C for a minimum period
of 15 days. The biogas that is generated
has a high proportion of methane and is
partly used to heat the digester during
the cooler season.
Dewatering
The digested sludge passes through
centrifuges in order to achieve a dry
solids content of 24%. Polymer is
injected to the sludge upstream of
the centrifuges to create flocculated
particles and improve drainage. Drying
The dewatered sludge is transported by
trucks to the open sludge solar drying beds.
Subject to the weather condition, this
process takes around 30 days.
9. OdourStream
Nitrogenous and sulphurous compounds
cause odorous nuisance and have to be
treated. The hydrogen sulphide gas (H2
S)
is the main odorous gas to be treated
in the STPs.
The fouled air is collected from each
structure where H2
S is generated and
conveyed through ventilation pipes
to the odour treatment building.
The odour treatment consists of both
biological and chemical treatments.
The fouled air flows from the bottom
to the top of each biological and chemical
scrubber to be treated. Chemical treatment
consists of spraying consecutively acid
and alkaline solutions (a mix of soda
and bleach) to remove nitrogenous
and sulphurous compounds.
10. CorporateSocialResponsibility Emiratization
The plants have been designed to limit the environmental impact by reducing the carbon and water footprints.
Awareness campaign
for schools and
universities
To educate the youth about the water cycle
and attract talents, specific actions adapted
to different age ranges are planned in the
emirate of Abu Dhabi:
• 6-12 years: visits in schools
• 12-18 years: plant on-site visits
• 18+ years: internship programs.
This 3-year program aims at diversifying
the economy by contributing to the
education and development of UAE
human resources and talent development
through a tailor-made and innovative
apprenticeship solution.
This agreement directly subscribes to the
Human Development Pillar of the UAE
Vision 2021, which deems innovation,
research, science and technology as the
key pillars of a knowledge-based, highly
productive and competitive economy.
Objectives:
• Develop a pool of skilled technicians in
the field of water services to accompany
Emiratization process
• Ensure the highest standard of technical
knowledge and competences by
aligning the program on European
certification process.
VeBesO&M,ADPolyandVeoliasignaMOUto
developanewprogramsupportingEmiratization
Water
Re-use of treated sewage effluent: Water is a
precious resource and and the emirate of Abu
Dhabi Abu Dhabi is clearly committed to making
the most of the available water. Veolia supports
this policy by proposing a solution to “slow
down the water cycle” and re-use water.
The Treated Sewage Effluent (TSE) produced
by the plant is effectively entirely re-used
for green spaces watering purposes.
Sludge
On-going pilot in Allahamah
demonstrating that bio-solids can
be re-used in forestation as fertilizers
but also as efficient water absorbent
allowing to save irrigation
water consumption.
Chemicals
Biological treatment for odour
treatment added to the chemical
odour treatment and to save on
chemical consumption.
Energy
30% less
than foreseen in design,
sludge dries naturally,
re-use of biogas
under study.
11. AlWathbaVeolia BesixWasteWater-PJSC
P.O. Box 28416, Abu Dhabi, United Arab Emirates
Tel: +971 (0) 2 585 6227
www.alwathbawater.ae
Photothèque VEOLIA - Stéphane Lavoué; Photothèque VEOLIA - Christophe Majani d’Inguimbert; Philippe Paulissen