The LOTUS generators produce chlorine dioxide on site from two base chemicals, hydrochloric acid and sodium chlorite (diluted, HCl 9% and NaClO2 7.5%, in EASY, MINI and MAXI; concentrated in ULTRA), in a closed reaction chamber. Production is proportional to the water flow or controlled by a set point, and the solution is dosed directly into the water: no chlorine dioxide is stored outside the process.
A highly effective oxidant and disinfectant: it acts on all organic species, including Legionella and biofilm, and oxidises iron and manganese. It is used in water supply network storage tanks, in hot water systems of hotels, hospitals and swimming pools, in industry (washing of bottles, fruit and vegetables, cooling towers), in livestock farming and in agriculture.
Insight: the disinfectants used →It exerts its disinfecting action in approximately 5 minutes of contact and remains in solution for a long time, reaching even the most remote or stagnant areas of the system, with a residual effectiveness greater than that of other disinfectants.
It destroys biofilm, which offers shelter and nourishment to bacteria such as Legionella, and counteracts its re-formation, with an effectiveness considerably greater than that of sodium hypochlorite.
It does not alter the odour, taste or colour of the water, is active between pH 4 and 10, does not form trihalomethanes or organohalogen compounds and does not react with ammonia, thus avoiding the formation of chloramines.
Recommended concentration against Legionella: 0.1 – 1.0 mg/l, depending on the system, the water and the level of contamination. In the event of high contamination, a temporary flushing of the network with 5 – 10 mg/l (shock treatment) is possible, prohibiting the use of hot water and subsequently bringing the concentration back to operating values.
The simple, professional way to produce chlorine dioxide: an all-in-one controller with two metering pumps, mounted on a 600 × 800 mm panel with by-pass line.
Compact generator in an ASA enclosure, with three metering pumps for hydrochloric acid, sodium chlorite and dilution water. Also available with chlorine dioxide measurement (SCL2 cell for cold water, SCL17 for hot water) or ORP measurement (ERH electrode), with probe holder and filter.
The largest generator of the range, for the high chlorine dioxide production required by large water treatment plants.
For the highest productions: it works with concentrated hydrochloric acid (33%) and sodium chlorite (25%), pumped in the right proportion into a pressurised reactor. Production is constant, set in grams per hour, proportional to a pulse water meter or to a mA signal.
Chlorine dioxide is an unstable compound, subject to rapid degradation: it is used in stabilised form or generated directly at the point of use.
Insight: chlorine dioxide →Stabilised chlorine dioxide is activated by the user with a second product and must be used within approximately 30 days, with decreasing effectiveness; after the container has been opened, chlorites and chlorates may form. It is dosed with dosing stations or with the LDsCL system.
LDsCL system →The precursors, hydrochloric acid and sodium chlorite (diluted, HCl 9% and NaClO2 7.5%, in EASY, MINI and MAXI; concentrated in ULTRA), cost considerably less than stabilised chlorine dioxide; generation on demand ensures an always fresh product, with virtually no by-products.
In the closed reaction chamber, the water and the two precursors react, forming chlorine dioxide.
Water carries the reaction products: in the LOTUS EASY it flows through the by-pass line, in MINI, MAXI and ULTRA a dedicated metering pump (grey) feeds the dilution water.
The red metering pump feeds the first precursor, hydrochloric acid (HCl: 9% in EASY, MINI and MAXI, 33% in ULTRA), a molecule consisting of one hydrogen atom bonded to one chlorine atom.
The blue metering pump feeds sodium chlorite (NaClO2: 7.5% in EASY, MINI and MAXI, 25% in ULTRA), which in solution dissociates into sodium ion and chlorite ion, consisting of one chlorine atom and two oxygen atoms.
In the closed reaction chamber, at controlled pressure, the acid converts the chlorite into chlorine dioxide; sodium chloride and water are formed as secondary products.
The chlorine dioxide (ClO2) solution, at 2 g/l in EASY, MINI and MAXI, is dosed straight into the water: no chlorine dioxide is stored outside the process.
The reaction: 5 NaClO2 + 4 HCl → 4 ClO2 + 5 NaCl + 2 H2O.
The reaction takes place in a closed chamber at controlled pressure; multifunction valves on the injection points protect the chamber.
The closed reaction chamber avoids any loss of chlorine dioxide and gives a highly stable solution.
Hydrochloric acid 9% and sodium chlorite 7.5%, drawn from their tanks by suction lances with level switches that stop the pumps when a tank is empty.
Chlorine dioxide is produced only when needed, proportional to the water flow or to a set point, and dosed straight into the water.
Chlorine dioxide production follows the water flow or a measured value; the versions with probe measurement (MINI, MAXI and ULTRA) regulate it on the residual or on the Redox potential.
Production follows the circulating water flow, measured by a pulse-output water meter or by a 0/4 – 20 mA signal: available on all models.
Water meters →
The set point is set in mg/l: the closed amperometric cell, SCL2 for cold water or SCL17 for hot water, regulates production (MINI, MAXI and ULTRA with probe measurement).
SCL cells →
The set point is set in mV: the ERH Redox electrode regulates production until the set value is reached (MINI, MAXI and ULTRA with probe measurement).
Redox electrodes →The suction lances of the precursors have level probes: when a tank is empty the pumps stop and the controller signals the alarm.
SEFL flow sensors on the pumps check that each chemical is actually dosed; flow alarm input and stand-by input on the controller.
Detection of chlorine dioxide in the air of the installation room: optional on all models.
Real-time production data, alarm log stored without battery and service due date; USB data log, Wi-Fi, Ethernet, mobile modem and Modbus as options.
| EASY 8 | EASY 20 | EASY 40 | EASY 80 | |
|---|---|---|---|---|
| ClO2 max capacity | 8 g/h | 20 g/h | 40 g/h | 80 g/h |
| ClO2 max capacity (24 h) | 192 g/day | 480 g/day | 960 g/day | 1,920 g/day |
| Max chemicals consumption (HCl / NaClO2) | 0.2 / 0.2 l/h | 0.5 / 0.5 l/h | 1.0 / 1.0 l/h | 2.0 / 2.0 l/h |
| Max pressure | 8 bar | 8 bar | 8 bar | 8 bar |
| Concentration | 2 g/l | 2 g/l | 2 g/l | 2 g/l |
| Power supply | 230 VAC (190 – 265) or 115 VAC (90 – 135) |
| MINI 8 | MINI 20 | |
|---|---|---|
| ClO2 max capacity | 8 g/h | 20 g/h |
| ClO2 max capacity (24 h) | 192 g/day | 480 g/day |
| Max chemicals consumption (HCl / NaClO2) | 0.2 / 0.2 l/h | 0.5 / 0.5 l/h |
| Max working pressure | 8 bar | 8 bar |
| Max water inlet pressure | 5 bar | 5 bar |
| Concentration | 2 g/l | 2 g/l |
| Max power consumption | 60 W | 66 W |
| Versions | without measurement, ERH, SCL2, SCL17 | without measurement, ERH, SCL2, SCL17 |
| MAXI 80 | MAXI 160 | MAXI 240 | MAXI 400 | MAXI 600 | MAXI 1000 | |
|---|---|---|---|---|---|---|
| ClO2 max capacity | 80 g/h | 160 g/h | 240 g/h | 400 g/h | 600 g/h | 1,000 g/h |
| Max pressure | 8 bar | 8 bar | 8 bar | 8 bar | 5 bar | 4 bar |
| Max chemicals consumption (HCl / NaClO2) | 2 / 2 l/h | 4 / 4 l/h | 6 / 6 l/h | 10 / 10 l/h | 15 / 15 l/h | 25 / 25 l/h |
| Power consumption | 44 W | 44 W | 44 W | 56 W | 96 W | 96 W |
| Concentration | 2 g/l | 2 g/l | 2 g/l | 2 g/l | 2 g/l | 2 g/l |
| ULTRA 1000 | ULTRA 2000 | ULTRA 3000 | ULTRA 4000 | |
|---|---|---|---|---|
| ClO2 max capacity | 1,000 g/h | 2,000 g/h | 3,000 g/h | 4,000 g/h |
| Max working pressure | 5 bar | 5 bar | 5 bar | 2 bar |
| Max chemicals consumption | 6.1 l/h | 12.2 l/h | 18.3 l/h | 24.4 l/h |
| Chemicals | acid 33%, chlorite 25% | acid 33%, chlorite 25% | acid 33%, chlorite 25% | acid 33%, chlorite 25% |
| Max power consumption | 150 W | 150 W | 150 W | 150 W |
Raw water from wells and springs, private and from public water supply networks.
Insight: well water →Domestic water circuits of hotels and accommodation facilities, hospitals, care homes and swimming pools.
Process water, food washing, cooling towers.
Municipal and industrial wastewater.
Components complementary to the generator for the installation on the water line.
For the film-forming inhibitor or other chemicals dosed together with the chlorine dioxide.
Dosing pumps →
Installed on the water line, it measures the flow and makes chlorine dioxide production proportional to it.
Water meters →
For the precursors, with suction lance and level probe for signalling when the chemical has run out.
Lances →
It injects the chlorine dioxide into the pipe and prevents backflow of the water.
Injection →
It ensures the dispersion of the chlorine dioxide in the water and protects the pipe from direct contact with the product.
Mixers →
It attenuates the pulsations of the dosing pump.
Dampeners →Tell us the water flow to be treated and the application: we will propose the right LOTUS generator.
Call or write to us: a technician will reply with a tailored proposal of controllers, pumps, probes and accessories.