Hidrológiai Közlöny 1983 (63. évfolyam)

1. szám - Dr. Libor Oszkár–Dr. Barkács Katalin–Dr. Gráber Lea–Kuna László–Dr. Moser Judit–Dr. Varga Enikő: Települési szennyvíztisztítótelepek intenzifikálása vegyszeres derítéssel

Dr. Libor O. és tsai: Települési szennyvíztisztító telepek Hidrológiai Közlöny 1983. 1. sz. 47 [9] Libur O., Kollár Oy.: Eljárás lebegőanyag tartalmú vizek derítésére. 157—437 sz. magyar, 1 214 532 sz. angol, 3 511 778 sz. USA, 792 887 sz. japán szabadalom. [10] Dalpke H. L. : Abwasserklärung und Stoffrückgewinnung mit „Abwasserbentonit" Wochenblatt für Papierfabrikation 11/12, 400—402 (1972). [11] Seherler A.: Die Abwasserreinigung einer Sulfitzellstoff-Fabrik am Beispiel der Cellulose Attisholz AG. Ghimica 26, 3 (1972). [12

] Libor 0.: Die Wirkung aktivierter Tonminerallen in der Behandlung von Kreislaufwasser und Abwasser. I'TS

—WAF Seminar, München, 93—1 15 (1980). [13

] Libor O.

. Application of the Retamix (Flygtol) process for the intensification of the running sewage treatment plants around the lake Balaton Annales, Sectio Chimica, Tom. XV. 115—125 (1979). [ 1

4] Scherler A.: Die Reinigung von Restabwässern der Sulfitzellstoff Industrie Das Papier 26, 637—643 (1972). [ 15] Anonym: Neue Kläranlage der Papierfabrik Allbruck. Wochenblatt für Papierfabrikation 17, 663— —664 (1976). | 16] Klinga L. : Svensk Papperstidning ars 20 (1971). [ 17] Möbius Gh. H.

: Praktische Beispiele für spezielle Möglichkeiten zur Abwasserentlastung in Papierfabriken Wochenblatt für Papier fahr ikation 105, 733— —740 (1977). [18] Möbius Gh. H., Günther T. //.. Farbstoffentfernung aus l'apierfabriks — Abwässern durch die Behandlung mit dem Flvgtol — Verfahren. Wochenblatt für Papierfabrikation 102, 559- -561 (1974). [19] Hribik P., Polesinszky (!., Sátorhelyi T.: Tisztítómű a Sturovói Papírgyár részére. PA'M Műszaki Tervezés !), 45—48 (1977). [20] Libor 0.: Process for the recovery of fibers and fillers from paper industry effluents by the clarification of these wastewaters, 1 387 744 British Patent; 312 412 Östr. Patent; 561 668 Schweiz Patent. [21] Libor 0.: l'j hatékony eljárás szennyvizek tisztítására Búvár 33, 104 107 (1978). [22] Libor 0-, Diószegi E.: Üzemi kísérlet a Budakeszi Szennyvíztisztító Telep intenzifikálására Csatornamű Információ, 1—2, 5—10 (1979). [23] Moser .7., Libor O.: The effect of chemical treatment of sewage on the activated sludge of the second purification step Annales, Sectio Chimica, Tom XV., 131—145 (1979). [24] Stumm W

., Morgan. J.: Chemical aspects of coagulation ./. AWWA 54, 971 (1962). [25] Hahn H. II. : Coagulation. • Post Conference course as of IAYVP1Í at the Universitv of Birmingham. I 976. [26] Stumm W.

: Chemical interaction in particle separation Knvir.Sci. Techn. 11, 1066—1070(1977). [27] Licskó /.: Micro processes in coagulation Wat. Research 10, 143 (1976). [28] Gamp T. P., Stein I'. C.

: .1. Boston Soc. Civ. Engrs. 30, 219 (1943). [29] Ives K. ./., Bholc A. (!.: Study of flow through Couette flocculators II. Laboratory studies of flocculation kinetics, Wat. Research 11. 209—215 (1977). [30] Benze F.: Chem. Eng. Techn., I I 16—1120 (1967). [31] A nderen-Villegas If., Letterman R. I).: Optimizing flocculator power input •/. Envir. Eng. Dir., 102, 251—263 (1976). [32] Griffith ./. I)., Williams R. G.

: Application of jar-test analysis at Phoenix, Ariz. ./. AWWA, 825—830 (1972). Intensification of coinniunal sewage treatment by ela rifieation Libor, O. Barkács, K. Gráber, L. Kuna, L. Moser, .J. and Varga, E. At the majority of the present sewage treatment facilities the removal efficiency attained fails to meet the criteria specified. This may be due to the shortcomings of the method adopted, but even the modern plants providing primary- and biological treatment are overloaded from time to time, or permanently with growing frequency. The potential alternatives of increasing plant capacity consist of conventional enlargement and of providing more intensive treatment. The Retamix (Flvgtol) process has recently been introduced for the treatment of sewages The chemical basis underlying this process is a „bridge-bond" reaction, which takes place between certain clay minerals suspended in water and water soluble polymers and by which heteroflocs of very high settling rate are created. In Europe the process has found more widespread applications mainly in the pulp- and paper industries, where its advantages are most pronounced. The first applications of this process to sewage treatment date back to 1973. In addition to different laboratory tests, experiments were carried out in pilot plants and full-scale plants. During the first testing program the quality and quantity relationships of the chemicals applied were determined using different types of sewage. Moderate amounts of chemicals proved already sufficient for attaining satisfactory removal efficiencies in the treatment of sewages of different origin. Thus 90 percents of the suspended solids and significant proportions of the COD and the reactive phosphorus compounds could be removed. Successful full-scale tests were carried out at the sewage treatment plants of Balatonföld vár and Budakeszi. The results implied that high removal rates of the suspended soilds contributed greatly to the efficiency of the first stage in the treatment process, i. e., primary sedimentation. As a consequence thereof higher sludge activities were observed, the rates of phosphorus removal and nitrification increased and an effluent of higher quality was produced. Similar results were obtained, when the rate of sewage flow was increased by 70 to 100 percents. On the basis fo these results an intensified plant of 7500 in

n/d capacity was built at Keszthely to solve the problem of overloading until enlargement work on this plant was completed. Regardless of the good results, the efficiencies obtained in the plant-scale experiment were not as satisfactory as in the laboratory tests. Poor plant practice in performing the operations of chemical mixing and flocculation in the substantially larger equipment may be offered as explanation for this fact. In order to determine the operating parameters required a pilot-scale experimental unit was designed, constructed and operated continuously for six months. The efficiencies attained in this unit were the same as those of the laboratory tests. Round 85 per cent of the suspended solids, 70 to 75 percents of the COD and 70 to 90 percents of the phosphorus compounds were removed in the sedimentation basin at loading rates varying from 6 to 12 m/h. These figures are higher from 5 to 10 times than those commonly adopted for settling tanks. Encouraged by these pilot-plant results, a full scale plant experiment is scheduled for the near future. By applying this process at the units operating already, both the volume and the quality of the treated effluent are expected to increase.