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Hello everybody,
There are four treatments :
-Pre-treatment for eliminate the large suspended matter.
-First treatment: It is a decant of suspensed matter (primary sludges) (this treatment eliminate 60% of suspenced matter).
-Second treatment: we add the coagulant floculant for making flocs.
-Third treatment: it is a treatment by UV rays to eliminate pathogenic bacteries.
The water from the third treatment we can use it in watered after denitrification or to wash roads....
The sludges from waste water treatment we can use it in inceration in cements plants or use it as fertilizer or use it in methanation to generate electricity.
The question thatis generally asked and answered a lot of things, but it will be listed.
1-(coagulation)
To accelerate the sedimentation
2-(filtration systems)
Such as sand filtration
3-(membrane process)
Such as reverse osmosis
4- (Chemical disinfectants)
Such as ultra violet and ozone
5-(Adsorption systems)
6. Tertiary Treatment
their are more technichnologie used
French English
Bonjour
Concernant les eaux de surface ou souterraines nappes phréatiques , les systèmes employés sont de l'ordre de la filtration dans un premeir temps puis d'ajout de produits désifectant.
Concernant les eaux usées c'est un tout autre domaine et à ce jour il n'existe aucun traitement.
Il s'agit tout simplement d'une gestion des eaux usées, du lieu de leur nproduciton jusqu'au lieu de leur dospersion dans l'environnement. Par filtrage on supprime toutes les matières en suspension. Que deviennent elles?
Ensuite le liquide qui reste est dispersé dans les milieux hydrauliques naturels.
1 il faudrait mettre en place un réel dispositif d'épuration qui éliminerait toutes les matières en suspension comme la matière fécale
2 un dispositif de purification pour éliminer toutes la pollution dissoute (l'urine)
Trop couteux, trop compliqué à mettre en place, doit être changé trop souvent, pas sur d'avoir toujours un bon résultat
Il existre bien un autre système qui est l'assainissement Biologique avec une biotechnologie mais il se met le plus proche de la production d'eaux usées et il ne rejette son liquide que sur un exutoire végétalisé qui purifiera le sol de la pollution urinaire.
Mais là on est trop en avance sur les pratiques de notre siècle, il faudra encore attendre un autre siècle.
Hello
Concerning surface or groundwater, ground water, the systems used are of the order of filtration at first, then of additions of desifectants.
With regard to wastewater, this is an entirely different area and to date there is no treatment.
It is simply a matter of wastewater management, from the place where it is produced to the place where it spills into the environment. All suspended solids are removed by filtering. What happens to them? Then the remaining liquid is dispersed in natural hydraulic media.
1 it would be necessary to put in place a real purification device that would eliminate all the suspended matter like the fecal matter
2 a purification device to remove all dissolved pollution (urine)
Too costly, too complicated to set up, must be changed too often, not on always having a good result
There is another system that is biological sanitation with a biotechnology but it is closest to the production of waste water and it only releases its liquid on a vegetated outlet that will purify the soil of urinary pollution.
But here we are too far ahead of the practices of our century, we will have to wait another century.
Varios treatment technologies in water and wastewater treatment
1. Physical Treatment
- Screening
- Filteration
- Oil & Grease Seperator
- Dissolved Air Floatation system (DAF)
2. Chemical Treatment
- By adding Lime, Alum, Ferous Sulphate, Poly Electrolyte
3. Biological Treatment - Seondary Treatment
- Conventional Biological Treatment - ASP
- Extended Aeration
- MBR
- MBBR
- Chemo Autotrophic Activated Carbon Oxidation Treatment (CAACO)
- Oxidation Ditch
- C-TECH (Cyclic Treatment Technology)
- Anaerobic Treatment - Biogas Generation
4. Tertiary Treatment
- Nano Filteration
- Reverse Osmosis
- Sand Filter - Solids removal
- Carbon Filter - Color removal
- Dual Media Filteration (DMF) - TSS removal
- Ozonation - For color Removal
5. For Sludge treatment
- Filter Press- Plate type
- Filter press - Belt type
- Solar Drying
- Decanter- High RPM Machine
1) Filteration
2) Corrosion Inhabilition
3)Water Clarification and Demineralization
Following technologies can be used for water treatment
Most methods of water treatment varieties of
Different treatment processes drinking water or sewage
According to sources, that water quality and specifications set for them. It must be noted that the continuous change the specification of the water also leads often to a change in treatment processes. Since the specifications are always updated as a result of the continuous change of the upper limit for the concentration of some of the contents of the water and add new content to the list of specifications
Types of treatment for water
1-(coagulation)
To accelerate the sedimentation
2-(filtration systems)
Such as sand filtration
3-(membrane process)
Such as reverse osmosis
4- (Chemical disinfectants)
Such as ultra violet and ozone
5-(Adsorption systems)
Address systems by adding water adsorption material, such as activated carbon or aluminum oxide, to the water supply. And attract adsorbent (surface active substances) out chemical contaminants and physical make them “stick “Botha for disposal later.
6-(Water injection systems with air
Ventilation kinds
The air- water injection systems, also known as ventilation systems, air mixing water supply. The goal is to generate the largest possible area of air friction with water and cofactors undergone a demineralization
7-(Solar treatment)
Processors exploit solar water disinfection processes that occur naturally in nature and result of nature and reinforce those processors to produce results more efficiently. The solar modules are small or large
(wsp) such as oxidation ponds (
It may represent a good option for water treatment in developing countries that have a large number of sunny days because they are cheap and do not need to cost high operating
These are examples of methods of biological treatment
Wastewater Treatment
Considered biological treatment of sewage of the most important stages of processing that must be applied to the water at the station and the aim of this treatment to oxidize organic materials different in sewage and convert them into stable compounds and biomass composed mostly of bacteria and some micro-organisms that can be separated from the water and treated separately thus obtaining water practically free from organic pollution , and is considered the presence of oxygen and bacteria, the most important elements of the elements required for the success of biological treatment as well as other conditions such as temperature and the presence of some nutrients to help , and the common methods for biological treatment are:
First - biological filters:
- Is a method of biological filters of the oldest methods of biological treatment and less use at the present time, except for some uses in the treatment of industrial waste water?
Secondly - the biological drive roller:
- This is the way one of the ways the growth membrane fixed as is the case in biological filters, except that the biomass is that touches the water during the spin disks and is not water that comes into contact with media.
Thirdly - activated sludge:
- This method is one of the most common ways for the time being because of the effectiveness of high treatment and is so named because it is re part of the sludge deposited in sedimentation basins secondary to the basin ventilation and so continuously and this helps to speed up the process of biological and increase efficiency because of the increased density of biomass in aeration basin and thereby increase the rate of oxidative stress and break down organic material into their basic components , and the intervention of the treated water to the aeration tank after passing the primary sedimentation basins . .
Fourthly - prolonged ventilation:
It is one of the ways the activated sludge which is used to address the behaviour of small, which is an easy and flexible in operation and can be dispensed phase deposition primary and sewage treatment after booking floating material and sand, if possible, and the advantages of this method is to install organic materials and dispensing treatment sludge before drying or use
Fifthly - oxidation ditches:
It is a way of ventilation lengthy and designed in the same manner , but depends on the simplicity of the construction , operation, and consists of more than one channel in which the ventilation and turning sewage mechanically and featured basic that the amount of sediment in excess disbursements of sedimentation basins final relatively small and oxidizing address where sewage after refineries , and channels can be used for the deposition is also a certain period once to three times a day to stop the ventilation to allow sedimentation and then water is drained after deposition and re- run the process . During the period of sedimentation are booked sewage in assembly lines or using two units of oxidation channels or channel by dividing it into two parts and is not used in this operation is relatively small flows , while in normal operation should create a sedimentation basin after the final oxidation Twit
VI - oxidation ponds:
Oxidation ponds are considered the simplest ways at all sewage treatment and industrial waste is being used in most countries of the world and , for example, oxidation ponds represent one-third of the sewage treatment plants in the United States . These stem Lakes simple geometric ways to exceeding sometimes drilling and boot and settlement If the soil is cohesive and have strong depth usually small and large area
Brings together biologists , engineers, environmentalists and specialists in the treatment of sewage that scientific expertise process accumulated over the past quarter century confirmed the effectiveness of the biological treatment ( conventional ) for sewage and superiority on the types of chemical treatments and physical , despite the development and modernity , so that the system of biological treatment of sewage can controlled and has a very important feature is that a practical system depends on microorganisms that inhabit the sewage and household undertaking treatment and can be likened to the process of its self-purification of sea water when the disposal , including sewage .
This is what Abrralanchar broad types of biological treatment system in the cities of the developed world for sewage treatment.
Biological treatment system is distributed to a number of basic types universally applied a system (activated sludge system filters installation of natural stone pools, pools installation artificially ventilated disks biological water treatment plants) and we will focus on two types of this system and are treated pools installation (naturally ventilated) and activated sludge treatment in a manner
Greetings
Chemical Analyst
Ahmad kmal ghalep zaal
04/12/2014 . . . . .
OZONATION & MEMBRANCE AND NOW ULTRA VOILET
http://www.interet-general.info/spip.php?article19572
The question thatis generally asked and answered a lot of things, but it will be listed.
A healthy waystation of sewage treatment, and killed or commentsto activatethe process of ventilation sludge through continuous growth through aerobic bacteria. The efficiency of wastewater treatment to remove about95% of pollutants such as BOD, COD and TSS are. If necessary, addadditional reactors for an aerobic wastewater treatment Nvksykpossible. The use of prefabricatedunits, drinking water and sewage treatment packageespecially for small communitiessuch as rural areasand campsand plant sitesand military units Wastewater Treatment: RBC, ventilation and ventilationdeep surface. ,In water treatment: membranemade of nanon a noandsweeteners
For water treatment micro filtration, reverse osmosis & ultraviolet technology could be used and for waste water treatment activated sludge treatment, lagoon pond, Rotating Biological Contractors, Reed Bed, Coagulation and Flocculation technology etc. could be used.
