DE884709C - Use of the C O-rich exhaust air from assembly rooms for the fumigation of plant cultures in closed rooms - Google Patents

Description

(WiGBLS. 175)

ISSUED JULY 30, 1953

ρ 13068 III 145 f D

The invention relates to the utilization of CO., Enriched exhaust air from assembly rooms for fumigation of plant cultures in closed rooms.

It is well known that plants require carbon dioxide for assimilation. Since the C usually only about .03 to .04 ⁰ Zo is Oa content of the air, already numerous A ^ urge have been made to increase the plant's assimilation by an increased CO ₂ supply and thereby to influence plant growth favorable.

It has been shown that an increased COo supply is only useful in closed rooms, such as greenhouses, since in the open field, despite the low CO ₂ content of the air, maximum assimilation values are obtained due to the intense solar radiation during the daytime hours can no longer be increased by additional CO _{2 gassing.} In closed rooms, however, in which the light intensity is significantly lower, an increase in the C 0 ₂ concentration in the air has an extremely beneficial _{effect on plant growth if the CO 2} content does not exceed 1%.

In previous attempts on the fumigation of greenhouses, cold beds or hotbeds with CO ₂ , the CO _{2 was} either generated by burning carbon in solid form, such as charcoal, peat coke (see. Patents 438646 and 556202), whereby the The air heated during the combustion process is sometimes used for heating

which was used in greenhouses, or by burning carbon in liquid form, such as kerosene, gasoline, tar distillation products and the like (see patent specification 454883). Also industrial waste gases containing _{CO 2 are} has already been used for this purpose after appropriate purification processes (see patents 423 200 'and 312 793). Occasionally, the CO _{2 obtained} in one of these ways was temporarily stored in an alkaline solution and, if necessary, evaporated from this solution again, as from U.S. Patents 416,626 and 423300 is shown.

According to the invention, it is proposed to make the CO ₂ -rich exhaust air from assembly rooms, in particular cinemas, usable for the fumigation of plant cultures in closed rooms. It is known that the CO ₂ content increases to a large extent in rooms where large gatherings of people take place (cinemas, theaters, etc.). For example, a cinema hall with a volume of around 150 cubic meters can hold around 500 visitors. There. _{an adult emits around 201 CO 2} per hour in a resting state, around _{500X20X21.5 = 25,000 liters or 25 cbm CO 2} are produced during a cinema show lasting an average of 2.5 hours. CO ₂ amount the exhaust air from the cinema is enriched.

This exhaust air from the cinema, enriched in CO ₂ , has so far been discharged unused into the open air.

Is z. B. a movie theater with one or more ■ greenhouses, the volume of which, for example can correspond to that of the cinema, indirectly or directly connected, then this cinema exhaust air can be direct and without prior Cleaning operations in the cycle in which the usual cinema ventilation takes place are fed to the greenhouse unit. In the cold Season of the year, the heat content of this exhaust air can also be used to heat the greenhouses will. The greenhouses can also be processed using the hydroponic process.

Claims (1)

PATENT CLAIM: Use of the CO ₂ -rich exhaust air from assembly rooms for fumigation of plant cultures in closed rooms. 1 5294