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Optimization of the Operation of a Municipal Wastewater Treatment Plant with Hydrocotyle ranunculoides

Quispe Rebeca, Soto Mishel, Ingaruca Ever, Bulege Wilfredo, Custodio María

Journal of Ecological Engineering

2019

Vol. 20, nr 9

228--236

The objective of the study was to optimize the operation of the municipal wastewater treatment plant (WWTP) of the Sicaya district with Hydrocotyle ranunculoides. The relative growth rate of the macrophyte was determined, in addition to the relationship between the population growth area and the final weight according to the number of days elapsed. Medium fences were implemented and the tributary and effluent of the WWTP were characterized physicochemically and microbiologically. The results of the characterization corresponding to the tributary were as follows: 616 mg of TSS/L, 109.2 mg of BOD5/L, 305.4 mg of COD/L, 30.3 mg of oils and fats/L and 3 500 000 NMP of thermotolerant coliforms/100 ml. Owing to the implementation of two medium grids, large suspended solids were retained. The highest efficiency of COD removal with respect to the growth area of H. ranunculoides (2 226.96 m2) was 81.53%. While the efficiency of removal of thermotolerant coliforms was 79.2% at a water temperature of 12.32°C . Using the operational optimization model in the WWTP with H. ranunculoides, an area of 3 291.67 m2 of macrophyte population growth was achieved with a removal efficiency of 93.71% COD and an area of 3 591.67m2 to remove 79.95% of the thermotolerant coliforms at a temperature of 13°C.

Bacteriological contamination of Babia Gora Massif streams

Czekaj M., Grzyb J.

Environment Protection Engineering

2007

Vol. 33, nr 3

67-88

The main aim of this research was to present bacteriological contamination of Babia Gora Massif streams, especially with mesophilic bacteria, psychrophilic bacteria, proteolytic bacteria and also coliforms and thermotolerant coliforms. The analysis is entirely based on comparing total bacteria numbers in different streams in Babia Gora Massif (in side and outside the Babia Gora National Park). The authors discovered also the main reasons for bacterial expansion. They also assessed the impact of the natural conditions (season, weather) and human activity on bacteriological conatmination of streams. This research allows the identification of the main sources of pollution and evaluation of purity of streams in Babia Gora Massif.

Określono zanieczyszczenie bakteriologiczne potoków położonych w masywie Babiej Góry na podstawie ilościowej analizy bakterii mezofilnych, psychrofilnych, proteolitycznych oraz bakterii grupy coli i grupy coli typu kałowego. Przeprowadzone badania mają charakter porównawczy. Ich celem, oprócz wykazania stopnia zanieczyszczenia bakteriologicznego, było przede wszystkim wskazanie powodów i źródeł zanieczyszczenia bakteriami wód potoków położonych w masywie Babiej Góry zarówno w granicach, jak i poza granicami Babiogórskiego Parku Narodowego oraz określenie wpływu czynników pogodowych. Otrzymane wyniki i ich interpretacja pozwolą ograniczyć źródła zanieczyszczające wodę, a także mogą służyć do określenia jakości wód powierzchniowych pod kątem bakteriologicznym.