Search

The paper presents preliminary results of a study on the application of the SCD Probiotics Technology to improve surface water quality. The Technology is based on the principles of the effective microorganism (EM) technology developed in Japan over thirty years ago by Dr Teuro Higa. The study was carried out in 2006–2008 in a pond with an area of 1200 m2, receiving purified sewage discharged from a constructed wetland system with willow vegetation filter, in operation since 1994, to which the SCD Probiotics Technology was applied since September 2007 till June 2008. A decrease of biogens concentrations in the pond water was recorded after applying the tested technology – ammonium nitrate concentration decreased by 85.2%, total nitrogen by 56.9%, while total phosphorus by 77.6%. Chlorophyll a level also showed a decreasing tendency. However, more detailed studies are still required to confirm the effectiveness of the SCD Probiotics technology in the purification of surface water.

From 1986 to 1998, the primary productivity of psammic algae was investigated in the psammolittoral of Lake Piaseczno, a mesotrophic lake. The oxygen method was developed for the direct measurement of primary production of these algae based on light and dark bottles without disturbing the subsoil structure. This productivity was also estimated in an indirect way by measurement of chlorophyll a concentrations. The productivity of phytoplankton was also measured in the same zone. The correlation between the productivity of algae and the concentration of nutrients and major ions in water was calculated. During the study period, the highest production was found in the eupsammon (31.1 to 187.7 Cass·m-2·h-1), with the hydropsammon being lower (9.6 to 100.6 Cass·m-2·h-1). For phytoplankton biomass, the numbers were very low, which is typical of pristine lakes. The chlorophyll a concentration during the study period demonstrated a different pattern ranging from 53 mg·m-2 in the hydropsammon to 765 mg·m-2 in the eupsammon. The assimilation number for these communities was always 0.4) correlation was found between the primary production of the eupsammon and the psammolittoral phytoplankton, and the concentration of NH4-N, NO3-N, Ntot, PO4-P, Ptot. and K+ in the piezometer groundwater. No correlation was found between primary production, chlorophyll a concentration and the concentration of nutrients and major ions in the piezometer groundwater and psammolittoral water.