Development of granular sludge for textile wastewater treatment

The hydrodynamic characteristics of a 10-cm reciprocating plate column used for counter-current gas-liquid contacting was investigated. The values of gas holdup, interfacial area and maximum throughputs achievable in this unit put it in a favourable position in comparison with other types of contactors.



On a etudie les caracteristiques hydrodynamiques d'une colonne a plateaux reciproques de 10 cm utilisee pour le contact gaz-liquide a contre-courant. Les valeurs de la retention du gaz, de la surface interfaciale et des capacites maximums realisables dans cette unite rend le systeme interessant comparativement a d'autres types de contacteurs.

Gas liquid contacting in reciprocating plate columns: I. hydrodynamics

Concept of separation of stages coupled with novel design of reciprocating jet bioreactor have been incorporated in this research for the development of high efficiency treatment system for contaminated wastewaters.

Nitrification and denitrification in a system of reciprocating jet bioreactor

Kinetic investigations on growth parameters of nitrifying and COD oxidizing bacteria were carried out with recourse to a three stage reciprocating jet bioreactor system using real life wastewater. The system employed in this investigation essentially consisted of separate aerobic oxidation stage along with nitrification stage and anaerobic denitrification stage with facility for biomass recirculation whenever necessary. Steady-state COD oxidation reactor performance was assessed for various values of residence time. Yield coefficient and decay coefficient of COD oxidizing biomass were obtained as 0.3329 kg BM/kg COD and 0.0032 (1/h) respectively.

Wastewater nitrification kinetics using reciprocating jet bioreactor

In a two-stage pilot plant substantial degradation of dissolved organic carbon compounds and ammonium has been achieved by an aerobic biological process at an extremely short residence time of the waste water in the bioreactors. This success is due to the application of a new type of bioreactor, called the reciprocating jet bioreactor.

Biological elimination of ammonium contained at high concentration in waste water

In a two-stage pilot plant biological processes effect substantial degradation of organic carbon compounds and the ammonium contained in highly contaminated waste waters at extremely short mean residence time in the bioreactor. This achievement is mainly due to employment of a newly-developed type of bioreactor — the reciprocating jet bioreactor.

R. Hennig

Papers

Aerobic two-stage biological degradation of organic carbon compounds and ammonium