Offshore & Inshore, Safe Pollution Removers and tanks sludge emptying Our planet environment is very sensitive to any strange objects that may contact with it in a wrong way, or that is causing a negative impact. In this case this strange object has to be completely removed from the environment; this strange object is called “POLLUTION” and the removing operation is called “FIGHTING”. Since Gas & oil producing is one of the important, big and major industries in our plant, so we can’t neglect the pollution that is made accidentally from this type of industries, or in one of its different producing process (Digging, Producing, Refining, Tanking & Transporting).So, in this category we will cover the chemical fighting that deal with crude & refined oil pollution on different surfaces like water (sea), birds and living creatures, shores, streets/road, concretes (etc.).
Also in this category we will cover the sludge emptying and cleaning of crude oil tanks, tankers and waste pits (pools), with out harming the environment or the workers, and with the completely recovery of about 80% crude oil from the total sludge amount in the tanks, tankers or waste pits (pools).
When any amount of crude oil is spilled in the sea water, that makes a serious environmental pollution is born and started, it must be fighted and removed immediately, effectively, easily and with a minimum impact on the environment. Of course all of us well known about this disaster, which we have one of its certified solutions and we have its required certifications. One of the effective certified solutions for dealing with the spilled oils in the sea is disperse it in the sea water by using special dispersants, which are a group of mild chemicals specially designed to be sprayed onto oil slicks, to enhance and accelerate the process of natural dispersion and natural degradation.
Spraying dispersants may be the only mean of removing oil from the sea surface, particularly when mechanical recovery is not possible. It is used in intended to minimize the damage caused by floating oil, for example to birds, marine living creatures or sensitive shorelines. We produce several types of oil spill dispersant, but the one which we are very proud in it, and the one that content the latest updated technology in this field, is D.G.S. 500 O,S&R the high performance oil spill dispersant. Because we all sharing in the same environment, so we will try to make the following information and materials are more educational and simple
Special cleaners family, which are designed specially for all safe cleaning purposes, like cleaning of oily polluted birds and living creatures, Beach and harbor Cleaners & removing oil spills that caused by road accidents and oil contamination on oily concrete and different surfaces.
Designing and producing a safe cleaners family, is a difficult issue that need to be studied from different angles, like the effectiveness, sides affection, wasting and economic.
Since all of the oil base pollutions are common in main factors that make it very hard to be removed and cleaned, the factors are:
Adhering power to surfaces.
Non-washable by water.
So we work on these factors to reverse it and brick it, to design special cleaners that make the oil base pollutions is non-sticky and very easy to be removed, cleaned and washed by water, and loose its ability to adhere to other surfaces so it well never case problem again.
However, cleaning living creatures and different delicate or hard surfaces, which are contaminated by oil base pollutions, is not that easy. There are a lot of other factors need to be care of when effective cleaner’s designed, some of this factors is:
Strong and effective cleaner, that is economic, easy to use and save time and power.
Water base in a concentrate form, to be diluted with water in a high ratios before work.
Non-danger, non-flammable, non-caustic, non-toxic, neutral and mild cleaner.
Work on any surface with no special precautions.
With no disturbing or un-pleasant odor during or after cleaning operation.
With no side effect and with out harming the subject to be cleaned.
With no side effect and with out harming the surrounded surfaces or the environment.
With no side effect and with out harming the worker operator or the waste systems.
So any cleaner which is very effective in the oil base pollution under all the previously mentioned factors, we can call it a “safe cleaner” and can be used for safe cleaning.
After detailed researches, we succeeded to design and produce a complete family of the “safe cleaners”. That can be used for the required purposes.
A version of these safe cleaners is the cleaners that are to be used for completely cleaning polluted Birds and living creatures (cleaning oily Birds and living creatures)
Special version of these safe cleaners is for completely cleaning polluted beaches, sands and rocks (cleaning oily beaches).
Another version of these safe cleaners is to be used for a completely cleaning oil polluted roads and concretes surfaces (cleaning oily roads and concretes).
[2-A] - Cleaning Oily Birds and Living Creatures
When an oil spillage occurs in the sea forming a oil slicks, one of the artifice-less victims is the marine and the sea Birds and living creatures, that get covered and contaminated by the oil, and it can not clean it self. Mostly they die, unless if we interfere immediately and effectively by the right ways.
We designed very powerful and completely safe cleaners for this purpose, which is to be used manually or mechanically for used manually or mechanically for a completely safe cleaning for the marine and the sea birds and living creatures, also it can be very safely used for the cleaning of humans body and for a limited cleaning for the cleaners sensitive skins.
[2-B] - Cleaning Oily Beaches and shores
Occasionally the currents or the winds push the oil slick from the middle of the sea to the shore line, and when it hits the beach or a rocky shore area this make another problem occur. Because now the beach or the rocky shore is out of order and can not be used ether by the humans or by the sea birds and living creatures that they used to use or to live in this shores.
To solve this problem effectively and safely, we designed very powerful and completely safe cleaners for completely cleaning polluted beaches, sands and rocks, which is to be used manually or mechanically for a completely safe cleaning.
[2-C] - Cleaning Oily Roads, Concretes And All Other Surfaces
When some oil is spilled on the road or the street, that makes the driving on this road is very danger, and this road must be closed until spilled oil is completely removed and cleaned. Also this types of problems need to be solved quickly and effectively, to reopen the closed road in short time, and to guaranty that the road is safe to be used again by the drivers.
To solve this problem in short time, effectively and safely, we designed very powerful and completely safe cleaners for completely cleaning oily polluted roads.
Also these safe cleaners can be used for a non-countable jobs, for example the effectively and safely cleaning for all “oily” concretes, plastics, vinyl, rubbers, woods, glasses, painted and metal surfaces and objects. It can be used manually or mechanically, hot or cold for a completely effective and safe cleaning.
We must point to that most of the safe cleaners family are delivered in a very high concentrate form, and must be diluted with water before used, because it wont work effectively if it is used undiluted with water (net). The dilution of the safe cleaning family products by water enhances and increases the powerful of it, and accelerates the cleaning operation and makes it easier.
New technology and new method, for the crude oil tanks, tankers and waste pits (pools) sludge emptying and cleaning operation, this operation advanced with a complete recovery for the crude oil that exists in the sludge content, and with minimum reducing for the materials to be disposing and wasting, and with the minimum reducing for most of the environmental hazards, all of this with minimum reducing of the total coasts.
First to know that the planning for crude oil tanks, tankers and waste pits (pools) sludge emptying and cleaning operation, content some of the difficult to solve problems and hard to answer questions, like:
How to empty and clean a tank from the sludge inside it?, by the easiest way to do this and without opening the tank.
How and where this useless sludge well be disposed, with out effecting our environment?, and without making more pits (pools).
How much it will coast to perform the emptying and cleaning operation?, and how much it will coast if the operation is not done?
How much time well be loosen to finish the complete operation?, and what is the intense work and transportation that is needed?
To take an idea about the actual size of the issue, please know that the average crude oil storage tank capacity is about 50’000 ton, if this tank needs a sludge emptying and cleaning that means that the sludge content in the tank has reached 40% up to 80% of the tank capacity.
This means, that we are dealing with a huge amount of a useless, non-disposal and environmentally danger sludge, this huge amount of sludge is from 20’000 ton up to 40’000 ton of the sludge that content in only ONE average crude oil storage tank
So it was very needed to develop the ordinary methods, or search for a new effective, economic and environmentally safe new method, for dealing with this huge amount of useless sludge and with out harming the environment or forming and digging for more pits (pools).
After performing the necessary research, we developed a new technology and new method, for sludge emptying and cleaning from the tanks, tankers and waste pits (pools).
This new technology and new method developed by our scientists and our long experiences in the oil fields, to give the tanks, tankers and waste pits (pools) sludge emptying and cleaning operation other unreachable dimensions. All of that was done by increasing and carrying out the following important benefits:
Effectively and clearly, reducing the total sludge amount inside the tank, tanker or waste pit (pool), and minimize it to about 0% sludge content.
Successfully and safely, reduce most of the negative side effects to the environment, workers and operation, and eliminate it either through the work process or when disposing the wastes.
Creatively and productively, convert all of the sludge content and transfer it to an usable and valuable materials, and to environmentally safe and easy to dispose wastes.
Scientifically and prolifically, recover most of the crude oil that is exists in the sludge content and extract it, and return it completely valuable crude oil again.
Busily and sufficiency, reduce the total amount of the sludge to be wasted and disposed from 100% to 20% down to 2% of the actual total sludge amount (100% of the sludge) in the tank, tanker or waste pit (pool).
Economically and reasonably, reduce the actual total coast, for the tank and the waste pit (pool) emptying and cleaning operation.
Effortlessly and obviously, reduce the needed time, transportation and the intense work that is needed to finish the same job by the ordinary ways.
The major main lines carried out in this new technology and new method is:
Effectively and easily, performing a complete sludge emptying and cleaning of the tank, tanker or waste pits (pools), from about 100% of the sludge volume inside it.
Liquefying the sludge, and make it able to be treated throw a closed circles, and to make it able to be transferred easily out side the tank or the pit.
Chemically and physically treat the sludge content, to extract and recovery about 80% specified crude oil, from the total sludge volume (100%) inside the tank or the pit.
After the crude oil recovery process, the remaining sludge volume is minimized and reduced down to about 20% of its actual volume (100%).
This 20% that is remained from the total sludge volume, is to be treated, converted and transferred to either usable and valuable materials, or environmentally safe and easy to dispose wastes.
So, finally the 100% of the actual sludge volume inside the tank, tanker or waste pit (pool) is converted through the operation to about:
80% recovered specified crude oil.
20% remaining valuable and environmentally safe to dispose materials.
That major main lines has been targeted and done by the following:
Extract and Recovery about 99% of the crude oil that is exists in all of the sludge content.
Convert and Transfer about 99% of the sludge volume that is remained after the recovery of the crude oil, to a usable and valuable materials, or environmentally safe and easy to dispose wastes, like mud, water and asphalt, with the amount of 20% of the total sludge amount.
Totally, this new technology and new method Increase the benefits and decrease the negatives of the other known methods, in the sludge emptying and cleaning operation for the tanks, tankers and waste pits (pools) from the total sludge content.
In the ordinary other known methods YOU used to hardly move out and dispose 100% of the total sludge content, which is considered (the sludge) as a completely danger, flammable, very difficult to dispose and environmentally hazarded material.
But, in our new technology and new method WE need to easily move out and dispose about 2% of the remaining of the sludge volume, which is considered (the sludge) as a completely non-danger, non-flammable, easy to dispose and environmentally safe material. For more details, we first must know that the oil production runs through different stages, one of which is the storage phase, during this phase the sludge is formatted.
Simply, the sludge is a complex mixture of:
Paraffin’s oil (crude oil).
Fine sands and dusts.
Other inorganic and secondary materials.
These complex mixtures (sludge), sediments down the tank or the waste pit (pool), and its quantities and volume grow bigger in time, until the tank or the waste pit (pool) considered out of operation.
Various methods were used in order to empty and clean tanks, the direct and the simplest way is to get rid of the sludge by opening the tank and removing the sludge away manually or mechanically, this method is highly costly and lead to other big environmental and hazard problems.
We developed our new technology, and designed our new method and operation for the sludge emptying and cleaning from the tanks, tankers and waste pits (pools). It consists of specific chemicals to be added, mechanical and a thermal process, by which different percentage of the sludge we recovered it into crude oil with the same specifications of the original crude oil was (that depend on the type of the crude oil, weathering, pressure, temperature and type and age of the sludge).
From the treatment process and sludge recovery, we get back most of the crude oil in the percentage of 80% some times up to 90% from the total amount of the sludge, and the remains of the treatment process and sludge recovery are mud, water and some asphalt components, with the percentage of 20% down to 10% from the total amount of the sludge, most of the remains are usable or environmentally safe to dispose.
The sludge recovery and treatment process units is specially designed and developed to treat sludge located at the bottom of the tank. The method is theoretically quit simple, the sludge is to be heated and then mixed with fresh crude oil, then the total sludge / fresh crude oil shall be heated up to 50° C, afterwards the specific chemicals substance is to be added by injection.
The required specific chemicals are manufacture by us, and designed so that the sludge layer shall be dissolved in the liquid phase (oil phase) and the water present shall be separated completely.
This new technology is very profitable, because the recovered crude oil can cover part of the expenses (the operation pays for it self). In additional, not spending more money on cleaning the same amount of sludge by the ordinary methods which is not compatible with the environment and safety regulations.
Our new technology and method is 100% environmentally friendly, as it leaves no sludge outside the tank, tanker or waste pit (pool), also it is a very easy and fast operation that an average tank takes about 20 days.
For more explanations, lets assume that you have a crude oil tank with the a storage capacity of 50’000 ton, and this crude oil tank content 50% sludge of its capacity, so we have the amount of 25’000 ton of useless and danger sludge to dial with.
(Case one), dialing with out our new technology and method, this data means that:
You have already lost half of the tank storing capacity.
You have 25’000 ton of sludge needs to be moved completely out of the tank.
You have 25’000 ton of sludge needs to be wasted and disposed completely.
What is the consideration for the safety of the operation, transportation and wasting.
What is the consideration for our environment, and how and where this amount of useless sludge will be disposed and wasted.
You have to pay a lot of money and spend a lot of time and perform intense work to finish the job.
(Case two), dialing with our new technology and method, so the given data means that:
We shall easily empty and clean the tank for you with out open it and we well restore for you 100% of its storage capacity (50’000 ton) again.
We shall recover the useless sludge for you to get back 80% crude oil from the sludge, this means 20’000 ton of crude oil been recovered and returned from nothing.
The remains of the recovered sludge is only 20% (5’000 ton), and this remains is mud, water and asphalt that is all usable and valuable, or environmentally safe to be wasted.
The recovered crude oil is valuable, and can be estimated as a part of the cost (come from nothing), also the job wont take half of the time by the ordinary ways, with no environment or safety worry (etc.).
By this new technology and new method, we have solved for you all of your capacity, method, time, safety, environment and financial problems. For this, we have developed this new technology and method for the crude oil tanks, tankers and waste pits (pools) sludge emptying and cleaning operation.
Our new technology and new method is changing the useless sludge into:
Pure and specific “Crude Oil”, that is usable and valuable.
“Mud, Water and Asphalt”, that is usable or environmentally safe to be wasted.
D.G.S. 500 O,S&R is a high performance water base oil spill dispersant, with a very low toxicity, in a new special formula. This new special formula doesn’t contain any hydrocarbon solvents, benzene, chlorinated solvents, aromatics, caustic alkalis, and free mineral acids. This new special formula is based on organic, non- toxic, non-corrosive, non-caustic, natural, and highly biodegradable compounds.
D.G.S. 500 O,S&R is a high concentrate product to be use as a type 2 as well as a type 3 dispersant for oil slick in sea water. It gives excellent stable dispersion to the oil by converting it in a physical action only (no chemical reaction) to very fine droplets, in order to accelerate natural physical and biological degradation processes, and to permit a good and natural oxygen exchange between air and water.
D.G.S. 500 O,S&R is a powerful degreasing & cleaning agent, that can be used safely to clean oil contaminated areas on beaches, rocky shores, harbor walls, decks, floors, drill cuttings and mechanical equipment’s.
[1-B] – Applications and ratios of D.G.S. 500 O,S&R
D.G.S. 500 O,S&R can be applied to open water by a variety of methods. In general workboats are more suitable for treating minor spills in harbors or confined waters. Large multi-engine planes are best equipped for handling large off-shore spills. Small, single-engine aircraft and helicopters are suitable for treating smaller spills and near shore areas. Regardless of the method used, it must be able to apply the D.G.S. 500 O,S&R effectively. In order to minimize losses due to wind drift, a uniform spray pattern of larger droplets, “rain drops”, are required rather than a fog or a mist. The ratio of D.G.S. 500 O,S&R to the oil, depends on many factors which include type of oil, viscosity, degree of weathering, ambient temperature and prevailing conditions. Generally this ratio can be estimated for a slick that is dark brown black in color, 100 microns in thickness, in area of 10000 m2. This would represent a slick of 1 ton of oil (approx.), and would require about 70 liters of D.G.S. 500 O,S&R (undiluted) for the complete treatment and dispersion of the slick .
1) Marine Vessel Applications (type 2 / 3)
Methods for D.G.S. 500 O,S&R application from sea going vessels include spraying through a set of nozzles fixed on outboard booms, and spraying from modified fire monitors. In a typical boom system, the booms are mounted as far forward as possible to ensure the D.G.S. 500 O,S&R is applied ahead of the bow wave which helps to mix the D.G.S. 500 O,S&R and oil. Spray units can be portable or permanently installed on a vessel. Systems are available that deliver neat D.G.S. 500 O,S&R or, with a separate water pump, apply D.G.S. 500 O,S&R diluted with water.
Vessel spraying is of limited utility as can only relatively small amounts of D.G.S. 500 O,S&R can be applied and because of the difficulties of locating the oil from a vessel. Furthermore, when slicks become fragmented or form narrow windrows, it is inevitable that some D.G.S. 500 O,S&R will be sprayed onto un-oiled sea. These problems can be partially overcome by controlling the operation from a spotter plane but this requires good air to sea communications.
D.G.S. 500 O,S&R can be sprayed in the undiluted mode (type 3), or for a better distribution in the diluted mode (type 2), from bow mounted spray booms in order to take advantage of the roll-over effect of the vessel’s bow wave. For best results, additional agitation is required by the use of the available methods (turbo-jet mixture, surface breaker boards or fire hoses). The discharge rate for the D.G.S. 500 O,S&R in the vessel Applications, can be obtained from the following equation:
[Discharge Rate] is the consumption of the concentrate D.G.S. 500 O,S&R (as supplied), this consumption will be given by liters per minute (liters/min). [Vessel speed] is the going speed of the spraying vessel, the speed should be stated by meter per minute (m/min) in the equation. To convert from “Knot” to “m/min”, use the following equation: Knot (kn) × 30.8866 = m/min [Swathe width] is the sum total lengths measurement of the spraying arms/booms , this sum total should be stated be meter (m) in the equation, and it is to be metered starting from the vessel side to the end of each spraying arm/boom, and then take the lengths measurement sum Note:D.G.S. 500 O,S&R can be sprayed on to oil slick in concentrated mode (as supplied), or in mixed mode (being mixed with sea water when sprayed). In case of mixed mode, use the available mixing ratio in the site, but if available we advice to use the mixing ratio of 1 : 19 – 1 : 4 [dispersant : sea water], it is about 5 – 20% concentration of the dispersant in the total spraying solution (that is depending on the case and data).
2) Aerial Applications (type 3)
The spraying of D.G.S. 500 O,S&R from aircraft has the significant advantages of rapid response, good visibility, high treatment rates and optimum D.G.S. 500 O,S&R use. In addition, aircraft allow treatment of spills at greater distances from shore than with vessels. Two categories of aircraft are used:
Those designed for agricultural or pest control operations which require minor modification for dispersant application.
Those which have been specifically adapted for the application of dispersant. Several types of helicopter have also been converted although most are able to carry under sling bucket spray systems without the need for modifications.
D.G.S. 500 O,S&R can be applied by a wide variety of rotary and fixed wing aircraft, particularly dedicated spray aircraft if these are available. It must be emphasized that due to aircraft speed atomization of the dispersant must be reduced by using a spray nozzle system that will give a large droplet size (700-1200 microns).
The discharge rate for the D.G.S. 500 O,S&R in the Aerial Application, can be obtained from the following equation:
3) On Beaches, Rocky Shores and Harbour Walls
D.G.S. 500 O,S&R can also be used on some shorelines, including beaches, rocks and sea walls, particularly during the final stages of clean-up. The most appropriate application equipment depends on the type of shoreline substrate to be cleaned, the ease of access and the scale of the operation. For small inaccessible beaches and coves, portable back-pack sprayers are the most suitable. For large expanses of shoreline, purpose-built vehicles can be used. Use
D.G.S. 500 O,S&R on the contaminated areas, using hot water jets, portable back sprays, or any dedicated beach cleaners (if these are not available use the available jet or manual methods).
D.G.S. 500 O,S&R was designed & manufactured in EGYPT to give several advantages
High performance, very low toxicity and highly biodegradable dispersant.
Completely safe product (water base), soluble in sea water.
Doesn’t contain any hydrocarbon solvents, benzene, chlorinated solvents, aromatics, caustic alkalis, and free mineral acids.
To be use as a type 2 as well as a type 3 dispersant, with a very strong spontaneous dispersing ability, even the slightest motion in water could be enough to disperse oil immediately & completely.
Enhance and accelerate natural physical and biological degradation for the dispersed oil.
Doesn’t attack or harm the micro organisms (specially the bacteria) which treat the dispersed oil by transfer it to proteins, release it to carbon & hydrogen (natural biodegradation process).
Prevent the formation of viscous oil emulsion (type “chocolate mousse”).
Reduce the oil / water interfacial tension, and inhibit dispersed oil to form slick again.
Doesn’t cause by any form a deposition for the spilled oil to the bottom of the sea.
Acting with the oil in a physical action only (no chemical reactions occur with the oil).
Enlarge oil interface which promotes the desired physical & biological degradation.
Prevent the contamination of spilled oil on ships, harbors, beaches, aquatic birds and living creatures.
Can be used to clean the contaminated areas on beaches, rocky shores, harbour walls, decks, floors, drill cuttings and mechanical equipment’s.
No agitating, disturbing, or unpleasant odor, and it is safe if accidentally contact with the humans skin.
Can be used by the available equipment’s (no special equipment’s required to apply).
No special precautions for storage, handling or using (only main chemical precautions to be taken).
Developed to meet all the requirements of warren spring laboratory specification LR 448 (OP).
Developed to meet all the requirements of the National Oil Spill Contingency Plan (NOSCP), under the control of the Egyptian Environmental Affairs Agency (EEAA).
For the facility’s and the availability of the product in the emergency cases in Egypt, we can produce and supply the product in a very short time (A.S.A.P.), by a previous agreement, also we can keep in stock a stated quantities that can be collected when needed in hours (6 : 12 hours).
Note: our factory is located in the 10th of Ramadan city, which is in a middle location:
95 minutes away from Suez (130 km from the Red Sea and the Suez Canal).
55 minutes away from Ismailia city (75 km from the middle of the Suez Canal).
120 minutes away from Portsaid city (160 km from the north of Suez Canal).
95 minutes away from Ahmed Hamdy – tunnel (130 km from Sinai main junction).
45 minutes away from Cairo city (60 km from the capital and national Air Port).
170 minutes away from Alexandria city (230 km from the Mediterranean Sea)
The addition of D.G.S. 500 O,S&R is intended to accelerate the natural dispersion of the oil slick. The natural dispersion of the oil slick occurs slowly when waves and other turbulence at the sea surface cause all or part of the slick to break up into droplets and enter into the water column. This natural dispersion is not stabilized with out an strong and effective oil spill dispersant like D.G.S. 500 O,S&R
D.G.S. 500 O,S&R is a blend of a hi-technology specially designed surfactants which are molecules, and have an affinity for two distinct liquids which do not mix, acting as an interface between them. A part of the surfactant molecule used in D.G.S. 500 O,S&R has an attraction to oil (oleophilic), while another part has an attraction for water (hydrophilic), forming immediately spontaneous stable dispersion in a physical mode only (NO CHEMICAL REACTIONS OCCUR).
When D.G.S. 500 O,S&R is sprayed onto an oil slick, the interfacial tension between the oil and water is reduced, promoting the formation of finely dispersed oil droplets. These droplets will remain in suspension; a characteristic plume will spread down from the water surface a few seconds after treatment forming a staple dispersion in the sea water column, in approximately depth of “8” down to “12” meter.
It is very important to notes that the D.G.S. 500 O,S&R work in a physical action only, and never cause a chemical reaction with the spilled crude oil. Because any chemical reaction with the spilled crude oil will cause the changing of the chemical formulation for it, and that will cause that the new chemical formulation of the crude oil won’t degrade, because the marine microorganisms and bacteria won’t recognized it, or it could take mach more time to start a slowly degradation, which will harm the environment.
Where the D.G.S. 500 O,S&R with the dispersed oil go?
After the oil slick is break up to finely droplets, and this finely droplets is completely spread and dispersed in the sea water column (dispersant & oil mixture), in this step the natural physical and biological degradation process started, depending on the dissolved free biotical oxygen and the marine microorganisms and bacteria that transfer the dispersant & oil mixture to proteins, release it to carbon & hydrogen. So the mixture between the D.G.S. 500 O,S&R and the spilled oil (finely dispersed oil droplets”), naturally degrade and become environmentally friendly with no negative side effect to the media.
While the marine microorganisms and bacteria are very important to perform the natural degradation for oil droplets in the water column. So we where very careful when we designed D.G.S. 500 O,S&R that it should not content even any slightly toxic materials or any other materials that may harm, attack or eject any type of the marine microorganisms and bacteria.
Not only that; but also we did conceder very much that all the content of D.G.S. 500 O,S&R should be an aliment or food to the marine microorganisms and bacteria that can feed on it, the point of view that all of the content of D.G.S. 500 O,S&R are fast, highly and completely degradable in the marine environment by the marine microorganisms and bacteria.