EXPLANATION OF THE RESULTS OF THE ANALYSIS MADE BY IPROMA THE 18/01/2018 AT THE EXIT OF THE DEPURADORA DEL BARRANC DEL BALDE, MONTE PEGO.

 

INTRODUCTION:

 

In Spain, water management (potable, waste or rain) ultimately corresponds to the Confederations, which are divided according to the river basin of the main rivers, in our case, although the valley of Pego is a basin Own hydrographic, we belong to the Jucar Hydrographic Confederation.

 

This body authorizes (or not) municipalities to pour residual water into certain Detention Points, which must be registered in the registry of the Confederation, and that they must fulfill a series of conditions (maximum values ​​of parameters of pollution, such as COD, BOD, etc.) expressed in the Authorization of Discharge.

 

Any residual water spill at an unauthorized point is prohibited, and therefore is punishable by the CHX. If any of the spill parameters (COD, DBO, etc.) exceeds the maximum values ​​of the Authorization, there is also a penalty. Normally these values ​​are below what the Community Directive indicates.

 

 

Below we have compared the results of the analysis with the values ​​of the EU directive (which indicates the definition).

 

 

SOLIDS IN SUSPENSION AND PARTICLES IN SUSPENSION:

 

SOLIDS IN SUSPENSION

The particles suspended in the waters help the adhesion of heavy metals and many other toxic organic compounds and pesticides that contain water and that when used for irrigation cause problems of toxicity since these toxic compounds are absorbed by the root zone of the water. plant and leaves accumulating in tissues, in concentrations high enough to cause damage and reduce their yields. The magnitude of the damage depends on the amount of ions absorbed and the sensitivity of the plant.

The suspended particles absorb heat from the sunlight, causing the turbid waters to become warmer, thus reducing the concentration of oxygen in the water (oxygen dissolves better in colder water). Also some organisms can not survive in warmer water.

 

SUSPENDED PARTICLES

The particles in suspension scatter light, thus decreasing the photosynthetic activity in plants and algae, which contributes to lowering

the oxygen concentration even more.

As a consequence of the sedimentation of the particles in the bottom, shallow lakes fill up faster, fish eggs and larvae

 of the insects are covered and suffocated, the gills are covered or damaged. Contamination by microorganisms can cause serious problems not

 only the health of plants and animals but also that of man, consumer of them. The presence of microorganisms should be monitored particularly in crops in which the roots or limbs of vegetables are consumed by man or animals.

The microbiological criteria of water quality are of great importance for the irrigation of fresh products, fruits, vegetables and export products.

To ensure the quality of the water for the irrigation of vegetables of raw consumption, they should not contain pathogenic microorganisms, thus ensuring the health of the population.

 

The maximum permissible in the directive is 35 mg / l.

IN THE ANALYSIS OF MONTE PEGO: 122 mg / L.

 

 

COD:

 

It is the same as the BOD but it represents all the water pollution, not only that which can degrade bacteria, but all, therefore it is always greater than BOD. The difference between BOD and COD is interpreted as contamination that is not degradable (in the short term) by microorganisms.

 

The maximum permissible in the directive is 125 mg / l.

IN THE MONTE PEGO ANALYSIS: 376 mg / L.

 

DBO5 (Biochemical Oxygen Demand in five days):

 

High levels of BOD indicate that the water is contaminated and needs a treatment to be used. The contamination of water by organic matter would cause in plants, that these organic pollutants accumulate in the roots or limbs of vegetables, and those affected are the consumers who ingest them directly.

The deficiencies of dissolved oxygen allow the release of iron and manganese and their dissolution causing, possible problems in the treatment of water. The taste and smell are also a risk in the absence of dissolved oxygen,

 cause of the potential production of hydrogen sulphide and other sulfur compounds.

The putrefaction of organic matter in water causes a decrease in the amount of oxygen (which is evaluated by the Biochemical Oxygen Demand, BOD) that causes serious damage to the aquatic flora and fauna.

 BOD, like COD, causes a decrease in dissolved oxygen,

affecting aquatic life. It is important to take into account the

relative variations of oxygen since if these variations are large it is a symptom that there has been an abnormal increase of vegetables, organic matter, aerobic germs, anaerobic reducers.

 

A concentration of 15 mg / l is established for BOD, for waters destined for vegetable irrigation, this value is in accordance with what is established in the General Water Law corresponding to waters for irrigation of raw consumption vegetables and animal beverages.

 

The maximum permissible in the directive is 25 mg / l.

IN THE ANALYSIS OF MONTE PEGO: 120 mg / l.

 

 

 

OILS AND RESIDUAL FATS:

 

Oils and fats from food or process residues

industrial (automobiles, lubricants, etc.) are difficult to metabolize by bacteria and float forming films in the water that damage living beings.

They interfere with the treatment of biological waste causing maintenance problems, in aquatic life, aesthetic impact.

The fats and oils in the irrigation waters form a film on the surface of the water, which, when in contact with the crops, interferes with the entry of sunlight onto the crops, thus preventing their biological development.

 

Limit in the directive: Not determinate

IN THE ANALYSIS OF MONTE PEGO: 3.9 mg / l.

 

 

NITROGEN:

 

The most important factor for plants is total nitrogen, whether its content is expressed in the form of nitrate, in the form of ammonium or as organic nitrogen.

Sensitive crops are affected by nitrogen concentrations above 5 mg / l, while most other crops are not affected until the concentrations exceed 30 mg / l.

 

At high concentrations of nitrogen the crop increases in size, while its sugar decreases in its content and purity, the excess of nitrogen prolongs its vegetative period while decreasing its production, as a consequence the harvests are smaller and the fruits tend to ripen late and lower sugar content.

Excessive concentrations of nitrates cause blood disorders. In addition, the high levels of nitrates and phosphates in the water stimulate the growth of blue-green algae, which leads to deoxygenation (eutrophication)

 

The maximum allowable in the directive is 15 mg / l.

IN THE ANALYSIS OF MONTE PEGO: 61 mg / l.

 

 

TOTAL FOSFOR:

 

It is a nutrient like nitrogen.

 

The maximum allowable in the directive is 2 mg / l.

IN THE ANALYSIS OF MONTE PEGO: 8 mg / L.

 

 

 

E. COLI (scherichia coli):

 

Bacteria family of enterobacteria found in the gastrointestinal tract of humans and warm-blooded animals.

 

The primary route of infection is ingestion, can cause gastroenteritis, diarrhea and intense vomiting, dehydration. It is often deadly if not treated properly.

At present, the presence of emerging pathogenic bacteria, such as Escherichia coli 0157, an enteropathogen that is causing diarrhea and hemorrhagic colitis, is recognized. Some outbreaks have been attributed to drinking water.

Some pathogenic bacteria that have great significance for health are the

Vibrio cholerae, Escherichia coli, Salmonella typhi, Shigella,

Campylobacter jejuni and the Yersiniaenterocolitica

 

. These bacteria are transmitted orally. Most have a time of

persistence in water that goes from short to moderate, low resistance to chlorine and a high infectious dose.

 

If is for reutilization or human consumption less than 100 CFU / 100ml 

IN THE ANALYSIS OF MONTE PEGO: 2.000.000 CFU / 100ml. !!

 

 

 

FECAL COLIFORMS:

 

The heat-tolerant coliforms comprise the genera of Escherichia and to a lesser extent Klebsiella, Enterobacter and Citrobacter. This group of organisms can ferment lactose between 44 - 45 ° C. The fecal streptococci are constituted by a species of the genus Streptococcus such as S. Faecalis, S. Faecium, S. Avium, S. Bovis, S. Equim and S. Gallinarum. All give a positive reaction with the antibodies for group D of Lancefield. Enterococci are differentiated from streptococci by their ability to grow in 6.5% NaCl and pH 9.6 at 45 ° C. Bacteria of the coliform group are found in the intestine, in human feces, and in those of warm-blooded animals. Gram-negative, rod-shaped, non-sporulated, aerobic and facultative anaerobic and negative oxidase bacteria capable of growing in the presence of bile salts or other surfactant compounds are called coliform organisms; They ferment lactose at temperatures of 35 oC to 37 oC with production of acid, gas and aldehyde between 24 and 48 hours. The following genera belong to this group: Escherichia, Citrobacter, Enterobacter and Klebsiella.

 

RISK:

The contamination by microorganisms can cause serious problems not only to the health of the plants and animals but also to the man, consumer of them. The presence of microorganisms should be monitored particularly in crops in which the roots or limbs of vegetables are consumed by man or animals.

The microbiological criteria of water quality are of great importance for the irrigation of fresh products, fruits, vegetables and export products.

To ensure the quality of the water for the irrigation of vegetables of raw consumption, they should not contain pathogenic microorganisms, thus ensuring the health of the population.

 

If is for reutilization or human consumption less than 100 CFU / 100ml.

IN THE MONTE PEGO ANALYSIS: 2.200.000 CFU / 100ml.  !!!

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