Denitrificators

Nitrates: causes and solution of a problem

The environmental contamination caused by nitrates is increasing in these last few years becoming a huge and relevant problem caused by the progressive and uncontrolled rise of their presence in the soil and in the deep and superficial waters.
The reason of the worrying phenomena must be investigated in many directions but principally in the common most frequent use of nitrogenous fertilizations in the agriculture, in the increase of the volume of the human and animal wastes and in the industry process that brings about industrial wastes with high concentration of nitrogenous components. These percolate the ground, and contaminate the deepest ground water tables.

In the last few years many scientists have focused their attention on many important researches regarding the presence of nitrates in the water, and they now consider these substances to be very dangerous for the health and essentially for their effect on the methemoglobins and on cancers.

The excessive presence of the nitrates makes a corrosive action towards zinc and tin, creating considerable inconveniences in some technological activities. The experts have also observed that when a considerable quantity of nitrates accumulates into a galvanized tank of water and you pass it into galvanized pipes you could have a huge development of nitrites (NO2^–) resulting in the reduction of the nitrates and this process is often wrongly assumed to be caused by pollution. The nitrates, according to the regulations in force, are allowed in the drinkable water up to 50 mg/l NO3^–. However, in some technological applications their concentration could be required to be considerably lower.

The Cullwater denitrificators are completely automatic equipments that are used for the selective removal of nitrates and sulphates, or of nitrates only. This transformation is due to our particular and specific anionic resins in form as CI^– with ionic change, highly selected in the granulometry for a long duration and a minimal consumption of regenerator (sodium chloride), necessary for their reactivation.

The Cullwater denitrificators are built in 29 completely automatic models with connections of 3/4” till 3” and equipped with time command or volumetric command.

Time command: The time command makes the regeneration of the denitrificator start on designated interval days and on the grounds of supposed water consumptions. If the consumptions are variable and unpredictable the regeneration can happen in advance (waste of regenerator) or late (leakage of nitrates and sulphates in service).

Volumetric command: The volumetric command makes the regeneration of the denitrificator start when the resins exhaust their capacity with evident conservation of regenerator.

Technical features of denitrificators

Model	Cyclic capacity and salt consumption in kg. for regeneration		L Resin	Average flow rate in service l/minute	Connections IN/OUT	Dimensions in mm.			Salt container capacity kg.	Shipping weight kg.
	NO^3-	Kg.				L	P	H
AS/AN 818 10A	200	2	10	5	1″	885	620	680	100	30
AS/AN 830 15A	300	3	15	7,5	1″	885	620	960	100	35
AS/AN 830 20A	400	4	20	10	1″	885	620	960	100	40
AS/AN 935 25A	500	5	25	12,5	1″	905	620	1100	100	45
AS/AN 1035 30A	600	6	30	15	1″	930	620	1150	100	50
AS/AN 1044 35A	700	7	35	17,5	1″	930	620	1450	100	55
AS/AN 1054 40A	800	8	40	20	1″	930	620	1580	100	60
AS/AN 1054 45A	900	9	45	22,5	1″	975	665	1580	150	65
AS/AN 1252 50A	1000	10	50	25	1″	980	665	1565	150	70
AS/AN 1252 60A	1200	12	60	30	1″	980	665	1565	150	80
AS/AN 1354 75A	1500	15	75	37,5	1″ – 1.1/2″	1050	665	1600	200	95
AS/AN 1465 100A	2000	20	100	50	1″ – 1.1/2″	1075	665	1860	200	135
AS/AN 1665 125A	2500	25	125	62,5	1″ – 1.1/2″	1125	665	1865	200	170
AS/AN 1665 150A	3000	30	150	75	1″ – 1.1/2″	1190	730	1865	300	200
AS/AN 1865 175A	3500	35	175	87,5	1.1/2″	1260	730	2150	300	230
AS/AN 1865 200A	4000	40	200	100	1.1/2″	1260	730	2150	300	260
AS/AN 2162 250A	5000	50	250	125	1.1/2″	1340	730	2090	300	320
AS/AN 2472 300A	6000	60	300	150	1.1/2″	1450	875	2290	400	380
AS/AN 2472 350A	7000	70	350	150	1.1/2″	1450	875	2290	400	440
AS/AN 3072 400A	8000	80	400	150	1.1/2″	1710	875	2290	400	510
AS/AN 3072 450A	9000	90	450	150	1.1/2″	1775	940	2290	500	580
AS/AN 3072 500A	10000	100	500	150	1.1/2″	1775	940	2290	500	630
AS/AN 3072 550A	11000	110	550	150	1.1/2″	1875	1040	2290	800	690
AS/AN 3672 600A	12000	120	600	150	1.1/2″	2030	1040	2390	800	740
AS/AN 3672 750A	15000	150	750	375	2″	2090	1100	2390	1000	930
AS/AN 3672 800A	16000	160	800	400	2″	2090	1100	2390	1000	980
AS/AN 4272 1000A	20000	200	1000	400	2″	2205	1100	2390	1000	1200
AS/AN 4872 1250A	25000	250	1250	625	2.1/2″ – 3″	2390	1490	2390	1000	1530
AS/AN 4872 1500A	30000	300	1500	700	2.1/2″ – 3″	2390	1490	2390	1000	1780
WORKING DATAS PRESSURE: min. 2 bar – max. 7 bar TEMPERATURE: min. 5 °C – max. 40 °C ELECTRIC POWER: 220/24 VOLT – 50HZ

Denitrificators

Nitrates: causes and solution of a problem

Technical features of denitrificators

WORKING DATAS