EFFECT OF FERTILIZER MATERIALS DERIVED FROM HOSPITALudWASTEWATER TREATED WITH BIODETOX TECHNOLOGY ON THEudGROWTH AND YIELD OF CHINESE CABBAGE (Brassica juncea L.)

摘要

The objective of the research was to analyze the wastewater of Sanglah General HospitaludCentre (RSUP Sanglah), Denpasar Bali Indonesia using Biodetox technology and to study theudresponses of Chinese cabbage (Brassica juncea L.) to the product. The research was conducted fromud15 May 2009 to 15 June 2012. Results of the research indicated that the technology using 7.2 hoursudday-1 aeration could reduce Biological Oxygen Demand (BOD) level to 88%, but increased theudFood/Microorganism (F/M) ratio to 13.94 g/BOD/day/g/Mixed Liquid Suspended Solids (MLSS),udshortened sludge age to 22.71 hours, lowered sludge recirculation to 23.25%, decreased pollutantudlevels to 0.6% MLSS and 78% TSS. Those results had met the quality standard for wastewaterudprocessing technology and for irrigation water respectively of Department of Health (Permenkes RIudNo. 416/MENKES/PER/IX/1990) and Department of Environment (Kepmen KLHudNo.02/MENKLH/I/1988) of Republic Indonesia. The characteristics of the wastewater (containingud1.97% N, 0.78% P, 0.33% S, 0.48% K, 0.19% Mg, 0.96 mg l-1 Fe, 0.08 mg l-1 Al, 0.11 mg l-1 Mn,ud0.19 mg l-1 Mg and 0.22 mg l-1 Mo), had also met the quality standard for fertilizer materialsud(Hammer, 2001). The products of the technology have been proven to be safely used as fertilizerudmaterials as indicated by no heavy metals contained and significantly 19.9% and 17.3% higher leafudand plant total fresh weights of Chinese cabbage, respectively compared to commercial Biosugih andudHyponex fertilizers at the rate of 15 g product pot-1.