Abstract
There has been presented the data on the composition of natural clays in order to select the optimum adsorbent in the technology of extracting from the liquid waste of the coke-chemical enterprise PRAT DKHZ in the city of Kamyanske phenols, rhodanides and ammonia. The advantages of the use of natural adsorbent glauconite in combination with cation flocculant CW 3279 in the complex purification of coke-chemical waste from phenols, rhodanides and ammonia are grounded, which are then fed to an active sludge with phenol- and rhodandestructive microorganisms. The process of activation of natural minerals — glauconite and zeolite with hydrochloric acid 7% HCl in the ratio of mineral sorbent: acid solution is used as 1: 6. The process of adsorption removal of phenols, rhodanides and ammonia from industrial wastewater in a laboratory installation with a stirrer with the use of glauconite, zeolite, bentonite, sunflower husk in the native form is explored; acid-activated zeolite and glauconite at doses of 2 g/dm3; bentonite and glauconite in combination with cation flocculant CW 3279 in volume of 5 ml/dm3 in the time interval 60—120 min. It has been experimentally determined that the most effective removal of phenols in industrial effluents from 410,74 mg/dm3 to 207,68 mg/dm3 occurs when using glauconite with cation flocculant CW 3279. It was investigated that when applying acid-activated zeolite with a dose of 2 g/dm3 and time contacting 120 min, reduction of the concentration of total ammonia from 1192,10 mg/dm3 to 340,60 mg/dm3, glauconite with cation flocculant CW 3279 — up to 510,90 mg/dm3 is provided. Degree of purification from rhodanide-ions by acid-activated zeolite has been reached in 1,5 times, whereas in the application of glauconite with cationic flocculant CW 3279 in 1,2 times. The regularities of adsorption extraction of phenols from model solutions have been established, which makes it possible to reduce their content from 1151,57 mg/dm3 to 355,36 mg/dm3 by glauconite in combination with cationic flocculant CW 3279 in the interval of 40—120 min. It is recommended to use glauconite at a dose of 2 g/dm3 in combination with cation flocculant CW 3279 — 5 ml/dm3 for 120 min drainage treatment. The sediment that is accumulated in the process of cleaning liquid waste is proposed to be processed and used as a binder in the paverment production.
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