How To Filter Soap Out Of Water

METHOD TO Care for SOAPY WASTEWATER

This invention refers to a method for the treatment of wastewater, soapy water in item, to remove contaminating elements and obtain water with sufficient quality to be used for showers, sanitary services, irrigation of greenish areas, etc.

The method of the following invention as well permits the possibility to make potable water from soapy h2o, so that this water tin exist used for its consumption.

Groundwork of the invention

At that place are different types and techniques that are known for the treatment of wastewater. These treatments depend on the substances that are found dissolved or suspended in water. Some water handling methods utilise sedimentation, changed osmosis (run into U.s.a. patent 5,401,421), treatment with rotating biological discs, evaporation, ionic interchange, active sludge, centrifugation (encounter Usa patent 4,168,231) and by filtering (run into Usa patent US3550778). For filtration there are different types of filters; for example, sand filters, filter press, and diatomaceous earth filters. The results of the traditional procedures of water treatments of the prior art go a sure recuperation of the properties that potable water has before contamination, and according to prior art techniques, potable water from wastewater has been obtain past inverse osmosis, which are methods that are extremely expensive and therefore commercially inefficient for the handling of large volumes of h2o.

For instance; the wastewater known every bit black or grey water are only treated in such a way that they can just be used for irrigation and in the all-time of the cases in laundry. In other words even with the handling these types of h2o still conserve remnant quantities, but unacceptable quantities of toxic substances and microorganisms, which are unsafe for health, thus, this water cannot exist used as beverage water.

In the case of water which is used in swimming pools, there is a large quantity of suspended organic substances, such as hair, fat and dust that must be removed from these bodies of water. Furthermore in case that said torso of water becomes stagnated, algae, fungi and other microorganisms tend to form, so said h2o should exist treated periodically and eventually substituted with new potable water. The methods used in the treatment of swimming pool water include treatment with sand filters and chlorinated chemic compounds. Other methods incorporate ammonium compounds. If pond pool water is non considered gray water or soapy h2o, they withal share certain undesirable characteristics and nowadays similar handling bug. With the present invention swimming puddle water will exist considered soapy water.

Sand filter treatment presents certain disadvantages. First of all, they require also much time to be prepared before they begin to filter effectively. Secondly, it is difficult to filter particles that have less than 23 microns pore in diameter. Moreover a lot of water is wasted when the filters are washed dorsum. This quantity of water is significant in comparison to the volumes of water that are filtered.

Regarding chemical water treatment of swimming pool h2o, information technology is common to utilise trichloroisocyanuric acid. The indiscriminate add-on of said chemical agent during prolonged periods of fourth dimension cause an increment in the concentration of cyanide that could event in being toxic.

Soapy h2o, like the wastewater produced by people when they shower, has the principal problem the separation of organic and inorganic soluble compounds, such equally soap, detergent and shampoo. The solubility of said compounds makes the sand filter treatment highly inefficient.

The utilize of diatomaceous earth filters is known to be used to remove fats from aquatic stream, these fats have large particle diameters. However this technique does not recognize the use of diatomaceous globe filters to eliminate soap, shampoo and organic and inorganic detergents.

With this in mind at that place isn't a viable procedure now to reconvert wastewater, specially soapy water into beverage water, since it has already been stated that they are soluble in water.

Therefore it is one of the objectives of the invention to obtain a treatment method of grey and black water.

Another purpose of the invention consists of obtaining a method to clarify wastewater, peculiarly black and gray water that contains dissolved soap, shampoo and water-soluble detergents.

Another purpose of the invention consists in making clarified and wastewater potable, particularly soapy water.

Some other purpose of the invention consists on the treatment of puddle h2o. Description of the invention

In order to get over the problems of the prior fine art nosotros have invented a method of h2o purification in which information technology is possible to brand drinkable water. The method of treating water in the present invention consists in a concrete-chemic process of clarifying that involves different operations of flocculation, coagulation and filtration operations past using diatomaceous earth. One embodiment of the nowadays invention includes a potabilization stage that includes the filtration of a stream of clarified water through a filter of diatomaceous earth. Some other embodiment of the present invention includes a phase of filtration of a stream of clarified water in a filter of diatomaceous earth and later on that oxidation with ozone (0₃), hydrogen peroxide (H₂0₂), finally passing through activated carbon filters, with this we tin can obtain water that meets the requirements of quality for human consumption.

Brief clarification of the drawings Figure one illustrates the clarification phase of the treatment according to our invention.

Figure two illustrates the potabilization method treatment of water according to our invention.

Detailed clarification of the invention

The degree of h2o contagion is variable and depends on the use it has, the contaminants in soapy wastewater vary from the full corporeality of puddle water, and of class black water.

One time that the polluting agents in the wastewater are removed from the h2o in different stages through the whole procedure. It is convenient to determine at the beginning of the procedure and in each one of the subsequent stages the concentration of said contaminants, to determine the most acceptable conditions of the operation for the h2o treatment and the efficiency of the method.

The unlike stages that comprise the method of the invention are described later in FIGS. 1 and ii.

Clarification

The stage of description in conformity with the invention is comprised of the stages of flocculation- coagulation and filtering through filters that contain diatomaceous earth.

The stages of flocculation and coagulation promote an agglomeration of the contaminants and it is an essential phase of the procedure. Once the soap, detergent and shampoo are water soluble, information technology is required that these acquire large enough particle diameters to be retained in a filter medium. For this event the stages of coagulation and flocculation are needed.

A source of wastewater, for example, soapy water, is put through an contained hydraulic meshwork to storage container (ane). Then the water is sent to flocculation tank (2) using pump (3). During the trajectory, the flocculent-coagulant and a base of operations or alkaline common salt are injected in the comport through two dosing devices

(4) and (5) respectively.

As flocculent agents can be used whatsoever type of flocculent known in the art, simply it is preferable to use inorganic polymers, in particular aluminum chlorhydroxide polymers of the formula (Al_n(OH)_mCI_3nm) at 50% 5/North. Said polymers are available in the market through the trademark GELIMAR made past Quimica

Rosmar Southward.A de C.V.

The addition phase of the aluminum chlorhydroxide polymers of the formula (Al_north(OH)_mCI_3nιτl) at fifty% VW, is disquisitional in the process of this invention. This flocculent has the ability of flocculate soap, shampoo, organic detergents and even inorganic detergents.

Normally, the inorganic detergents are eliminated through a physicochemical process through the utilize of iron or aluminum salts and other means well known in the art. The use of the aluminum chlorhydroxide polymers of the formula (Al_{due north}(OH)_mCI_3nm) at l% V7V flocculent offers the possibility to also eliminate inorganic detergents.

The base or alkaline salt has the purpose of increasing the pH of the solution until reaching low-cal alkaline concentration. In according to this invention it has been constitute that the stages of flocculation and coagulation have a better result in a pH between 7.5 and viii.0. The base of operations or alkali metal salt could be any organic or inorganic base or common salt, yet it is preferable to use light carbonate sodium (soda ash), since this compound has the property of dissolving rapidly in water and also conserving an alkaline metal pH value even though there may be variations in the sodium carbonate concentration.

The wastewater limerick, for example, soapy wastewater, the flocculent and the base of operations or common salt are held in tank 2 enough time and then that the particles be v flocculated and agglomerated. Information technology has been found that the optimum time of flocculation-coagulation is approximately 15 to 20 minutes.

Once the wastewater has remained in tank ii and so that the disperse substances flocculate and coagulate, the water is sent to a filtration stage in filters 7 that incorporate diatomaceous earth. o The method of handling of this invention operates by lots. So that the diatomaceous world filter has to be prepared each time that it treated a lot of water.

The diatomaceous world filters are prepared at the place of the process for whatever method known in that field of study, however information technology is preferable that they 5 be prepared by the following method. In a container comprising base for the filter, preferably a stainless steel mesh pass a break of diatomaceous globe. When the diatomaceous earth makes contact with the mesh it will begin to deposit itself in the mesh. The flow will be repeated until all of the diatomaceous world is deposited on the mesh. When this happens the h2o in the pause will start coming out of o the filter antiseptic.

An advantage of using this method is that the diatomaceous earth filter is compressed because of the pressure exhibited by the pump, and then that during this filtration operation the diatomaceous earth bed volition not be broken down.

The diatomaceous globe is an arable product that is commercially v available and is offered past various distributors. It is preferable to use diatomaceous earth that poses a pore diameter of i-micron average.

When passing wastewater that contains suspended particles through a filter of diatomaceous earth, the flocculated particles are eliminated with the suspended solids that did not flocculate. 1 or more filters that incorporate diatomaceous earth can make the filtration.

When the previous phase ends, the antiseptic h2o is deposited in tank (8). In the method of this invention, manometers or flow indicators that indicate the degree of saturation of the filters are optionally available. When the filters are obstructed considering they are saturated with the impurities that are removed from the main wastewater, it needs to replace the world of the filters.

To replace the globe of the filters it needs to apply a counter flow of air or steam through the filter. The earth as a whole should disassemble from the support mesh. The diatomaceous earth is and so compacted in a filter press and eventually thrown away as a mass composed of earth and mud that is easy to dispose off.

The treated water that is obtained in tank eight is crystalline water that can exist used for irrigation, washing and even as h2o for swimming pools. When nosotros talk nearly pool water an agent that prevents the growth of algae and microorganisms should be added.

Every bit it would exist obvious for a skilled on the art, additional stages tin can exist added in the procedure, for example incorporating filtration stages with sand filters or whatsoever other filters before the water is deposited in flocculation tank 2, or before of later on the water is deposited in tank 8. In a similar way, it can exist used a decantation phase so that the particles that precipitate tin can exist removed before the water that contains the flocculated particles is sent to filters 7. these variations are considered included inside this invention.

Table ane illustrates the characteristics of soapy water treated in regards in this invention. The first cavalcade indicates the characteristics of soapy wastewater. In the second column the characteristics of clarified water are indicated in regards to this invention, while the third column illustrates the characteristics of the potable h2o resulting from this invention. Said beverage water can be compared with the current standard 127SSA for drink water which characteristics are described in the fourth column.

In regards to an embodiment of this invention, a stage is included, which has the aim of making h2o potable according to the previously mentioned process.

Potabilization

In order to make potable water, the rest organic detergents, dissolved organic matter and microorganisms like bacteria and viruses that could exist are removed past oxidants.

According to the method of the invention, the use of aluminum chlorhydroxide polymers of the formula (Al_north(OH)_mCI_3nm) provoke traces of said chemical compound in the clarified water and its effective elimination is essential to obtain potable water. According to the official standard 127SSA for potable h2o, the aluminum does not have exceed 0.20 mg/liter.

To eliminate the dissolved organic material and microorganisms such as bacteria and virus, and too the residual aluminum chlorhydroxide polymers of the formula (Al_northward(OH)_mCI _northwardm) and remainder detergents, information technology needs to oxidize, preferably with a combination of ozone (0_three) and hydrogen peroxide (H₂0_ii). The use of such oxidants has the advantage that the resultant products of its reduction, this is water and oxygen does not contaminate drinkable water.

According to the modality of the invention, the clarified water stored in tank 8 is sent through the set of filters of diatomaceous globe x. For this consequence at least pump ix is needed. At the stop of filters 10 the oxidant is injected in the flow of water. Figure 2 illustrates the injection of hydrogen peroxide (H_ii0₂) through dosing device 11 and immediately ozone is injected (0₃). Produced by ozone generator 12. The ozone (0₃)is introduced in the flow of water through venturi thirteen, the flow is sent to contact reactor fourteen, this gives fourth dimension for the ozone to react in the h2o and destroy the organic cloth in the flow. The flow that goes out of contact reactor 14 is sent back to tank 8.

The oxidation stage with hydrogen peroxide and ozone has the aim to oxidize all compounds that are present in the water. As a effect of said oxidation, organic and inorganic material precipitates and tin can be efficiently removed from the flow of h2o through filters of diatomaceous earth. It is required that the water is submitted though the oxidants and the filtration with diatomaceous earth several times, this is obtained by recycling the water through this process.

The recycling time is variable, merely it depends basically on the quality of the desired h2o. A monitoring of the concentration and properties of the h2o stored in tank 8 volition determine the moment when the recycling of the water should be suspended.

It is of import to mention that the chemical demand of DQO oxygen in the resulting water is 0.0. In other words, all living material and all chemical organic and inorganic products that can exist oxidized will be finer oxidized.

One time the desired quality is obtained, as option water can exist sent through filters with activated carbon 15 filters with the aim of retaining to the maximum the final traces of soluble substances.

The final phase of potabilization consists in adding enough sodium hypochlorite to obtain a concentration of 0.five ppm to avoid contamination by algae and microorganisms, while it remains in storage in distribution cistern 17, from where it is sent to unlike services.

The laboratory analysis in this terminal phase will indicate the quality of water obtained to be used as potable h2o, according to the current standards. Table 1 illustrates the properties of potable water co-ordinate to this invention.

In regards to swimming puddle water after being purified with this invention, we can obtain water from which all kinds of dissolved fats and also lather and shampoo have been removed without the need of using chlorine and as well without the demand of disposing large volumes of water that are normally disposed of, when the retro launder of the sand filters used in this technique is made.

Additionally, due to the fact that DQO is equal to 0.0, water is not exposed to the quick evolution of microorganisms and fungi, which used to hateful longer maintenance times with electric current traditional methods. In addition, it is of import to mention that the h2o treated with ozone acquires a prissy blue color that is not obtained with the traditional methods.

Case

An example of the application according to the invention will exist illustrated in the post-obit passage.

Before starting the handling of a wastewater lot, a filter of diatomaceous earth is prepared by recycling a suspension of diatomaceous earth. The treatment starts by injecting 0.00075 of aluminum chlorhydroxide polymers of the formula (Al_{due north}(OH)_gCI3_nm) at fifty% 5/N compound per liter of water and a kg of light sodium carbonate (soda ash) per 10,000 liters of water increasing the pH to optimize flocculation and coagulation.

The floccules formed and the other contaminants laissez passer to a filtration organisation with filters of diatomaceous earth, with a pore bore of approximately one micron.

The resulting flow is sent to a tank and so information technology is passed again through diatomaceous earth filters.

To inject the wastewater in the diatomaceous earth filters, a pump, which is used to recycle the dispersion that prepares the diatomaceous earth filter, is used. For this effect, a valve arrangement is needed. After this, the menstruum of h2o passes through the contact reactors with ozone (0_iii), at sixty grams per hour and injecting at the same time hydrogen peroxide (H₂0₂) at 30% to maintain a concentration of 0.five ppm.

In this procedure the fat, oil, organic material, detergents, bacteria and virus are eliminated.

The water is recycled through the stages already mentioned until reaching the required quality. Finally, it passes through filters with activated carbon for the final destination of the process.

During the process different laboratory analysis should be made to verify the efficiency of the procedure in each phase and the obtained quality.

The post-obit table illustrates the wastewater properties and the properties of the obtained water later the clarification and potabilization stages.

Table i. Wastewater, clarified water and potable water properties.

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