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What is Wastewater?
Wastewater is any spent water from household, hotels, fast food restaurant, schools, and high rise buildings including fecal matter, urine, kitchen, bathroom laundry and other domestic activities.
Where does it come from?
Home- Human and household waste from toilets, sinks, bathroom and drains.
Industry, School and Business- chemicals and other waste from factories, food preparation operations, airports, shopping centre, hospitals, etc
What are the adverse effects of not treating wastewater?
- The pollution of ground water source e.g. Well, borehole, leads to increase in water borne diseases such as cholera, typhoid fever, dysentery etc.
- Pollution of the water bodies in the community e. g. canal, stream, river, lagoon, leading to loss of aquatic life such as fish, crabs, shrimps etc.
- Increased health care cost and lowered life expectancy
- Reduction in gross domestic product as a result of loss of man hours due to illness.
- Decline in aesthetic value of the environment and subsequent decrease in tourism potential
How can wastewater be treated?
Wastewater can either be sent to a wastewater treatment plant (WWTP) if a sewer network exists OR can be collected in a septic tank which will be emptied frequently.
What is LSWMO?
LSWMO stands for Lagos State Wastewater Management Office. It is responsible for the management of wastewater and some other related matters in the State.
Where is LSWMO located?
1, Obasa Street, Off Oba Akran Road, Ikeja, Lagos
When was LSWMO established?
It was established in 2010. It was formally Sewage Department of Ministry of Environment.
Who is a Wastewater Monitor?
Wastewater Monitors are the officers assigned to carry out an inspection on any properties in Lagos State either Residential or Organization on Sewage facilities and if found guilty will abate the nuisance. The inspection officer wears a jacket inscribed with the LSWMO names and logo with a valid identification card (I D).
What is a WWTP?
A Wastewater Treatment Plant is an Engineering designed to remove biological or chemical waste products from water, to produce a disposable effluent that causes no harm to the surrounding environment. A WWTP does the following:
1. Removes solid, everything from rags and plastic to sand and smaller particles found in wastewater.
2. Reduce organic matter and pollutants.
3. Restores oxygen- Ensuring the water back into our rivers or lakes has enough oxygen to support aquatic life.
Sewage Treatment is a process of removing contaminants from wastewater.
What are the requirements for permit to construct packaged plants?
The following documents should be sent to the LSWMO office:
(A) PERMIT TO CONSTRUCT
- Approved / proposed building drawing(s) of the building(s) from the Lagos State Ministry of Physical Planning and Urban Development showing location of the Wastewater Treatment Plant.
- Architectural drawing of the project.
- Topographical map with land use layout.
- Service drawing for the project showing the sewer/ piping connection from bathroom, kitchen, laundry and all other wastewater source into the wastewater treatment plant.
- Design report including design criteria and calculations of various units of the sewage scheme and design criteria.
- Details Engineering drawing(s) of your wastewater treatment facility showing sizing of unit components, pump station, manholes/ inspection chambers
- Alignments and gradients of the sewer lines into the various manholes to be used i. e sewer profiles relatives to the existing ground level.
- All activities within the sites have to be declared for necessary loads and wastewater generation capturing/ evaluation (this is necessary in view of the facts that some activities i.e. photographic chemicals, motor oil, laundries etc have potential effect on biological process of the treatment.
- Operations and maintenance manual.
- Contour drawing showing the topography of the pipe route.
- Ant other additional information relevant to your claims.
(B) CERTIFICATION OF WASTEWATER TREATMENT PLANT
- Certification of effluent quality ( to comply with stipulated standards)
- Certification of performance efficiency of the plants and equipment
- Certification of plants operator proficiency
- Baseline system efficiency and performances evaluation report and six (6) month system efficiency and performance evaluation report for existing plants.
- Certification of mini laboratory equipment (PH) meter, turbidity meter, and thermometer, total dissolved solid/ conductivity meter, dissolved oxygen meter.
- System efficiency and performance evaluation report.
NOTE: All documents must be duly endorsed by a COREN registered Engineer in one of the following disciplines : Civil, Mechanical, Water Resources with bias Environmental, Water and Wastewater and also with 10 years cognate as part requirements for the signatory
What is the Mission and Vision of LSWMO?
The vision of LSWMO is to ensure sustainable wastewater management in Lagos State through improved investment dynamics and implementation of environmentally sound policies, plan and programmes.
The mission of LSWMO is to eliminate risks of wastewater management on environment and public health.
What is a Pit latrine?
A pit latrine is a dry toilet system which collects human excrement in a large container. Pit latrines ranges from simple slits trenches to more elaborate systems with ventilation. The usage of pit latrine leads to contraction of diseases.
What is a Water closet?
Water closet is a small wash bowl or a sink that holds a toilet and can be located sometimes within the bathroom or in another area of your home.
What are the advantages of Water closet?
1. Reduce health cost.
2. It preserves your environment as well as that of your neighbor.
3. It protects Economic health of your community.
Can I operate a public toilet?
Yes, but it must be permitted by the State Government before operating.
What is a septic tank?
A septic tank is a chamber where wastewater can be collected and stored. Intestinal bacteria contained in fecal matter digest the waste collected and therefore begins the process of wastewater treatment.
What are the maintenance requirements of septic tank as home owner?
- Tank should be emptied regularly and this depends on the size of the tank, water consumption rate, number of persons using the tank. A good rule is to empty the tank when content is one –third of the tank.
- Do not over use heavy household cleaner especially those containing bleach as they kill beneficial bacteria in the tank.
- Septic tank should have lids for gases to escape and also as an outlet to empty the tank of its contents
- Reduce water consumption to bare minimum to avoid overloading the septic tank.
- Septic tank must be at least 50 m from an point of abstraction of groundwater supply
- Avoid pouring oil or grease down drains
- Do not build any structure over the septic tank, or to cover with concrete
- Keep from flushing or washing away materials that will not decompose
- Do not pour or flush hazardous chemicals such as paints, varnishes, waste oil down the drain.
- Keep trees at least 15 m away from septic tank.
What are the requirements for constructing septic tank?
1. Obtaining a permit from specified agencies or ministry.
2. Site Evaluation which can be done only by Professional Engineers and the purpose of this is to determine the soil quality, groundwater level, percolation rates in order to determine which septic system is suitable.
What Lagos residents are prohibited from using septic tank?
Residents in high water table are not permitted to have septic tanks because the water level is as high as the septic tank not storing only fecal matter but other water from the environment. Such areas like: Ajegunle, L/island, Victoria Island, Lekki, Ikoyi, Amuwo- odofin, Apapa, Ojo and some part of Lagos State with high level water. It is required by the law that residents of high rise building with more than Four floors and above should use packaged treatment plants.