Knowledge and practice about waste management among housewives in Cetan Village were low, i.e. 40 % did not know about waste and the health impact from bad waste management, and 65,6 % knew that waste can only be managed by burning it and throwing onto yards and rivers, 78 % had behavior of mixing and burning organic and inorganic wastes, and 22 % had habituality of throwing the mixed wastes onto vacant yards and rivers. This study was aimed to know the influence of demonstration method for increasing the knowledge and practice of the housewives about domestic waste management. The research method used was quasi experiment with non-equivalent control group design. 40 respondents for the experiment group and other 40 respondents for the control group were selected by using purposive sampling method. The data was analyzed by using Anova multivariate test at 95 % confidence level. A nine itemed questionnaire which had been tested for its validity (p<0,05) and realibility (p=0,711) was administered to measure the knowledge level, meanwhile a checklist with five items was used to measured the level of practice (the corresponding validity reliability tests yielded p values of <0,05 and 0,701, respectively). The results of the research showed that, in general, the elucidationwith demonstration method influenced the increase of knowledge and practice among the housewives (p=0,037). However, in specific, only the practice aspect was observed increase significantly (p=0,017), meanwhile the knowledge aspects was not (p=0,428). It can be concluded that demonstration method is more effective for increasing the practice of housewives in domestic waste management.

Leachate, especially from the landfill, is a pollutant that can harm human health and pollute the environment including aquatic biota, because the leachate contains various chemicals both organic and inorganic substances and also pathogen bacteria. Laboratory test by Department of Health – Yogyakarta (2001) showed that leachate from landfill had Biological Oxygen Demand (BOD) of 1032 mg/liter in which this was much higher than the limit allowed (BOD = 150 mg/liter. In order to reduce BOD in leachate, a treatment is needed. In this experiment a treatment to reduce BOD in leachate was carried out by applying coagulation andanaerobic bio-filtration with the time of 1, 2, and 3 hours. Evaluation of the tests was conducted using pre-test and post-test with control design which analysis was made descriptive and analytically using T-test with the error of about 5% (á =0,05). Results of the experiment indicated that there was a tendency of BOD reduction of about 0.9% - 1.1% for the control samples, whereas the BOD reduction for leachate attained 82.3% -90.5%. Based on the T-Test, the probability result was 0.000 (p< á =0.05). This means that there is a significant difference in BOD reduction between control samples and leachate. In other words leachate treatment using coagulation – anaerobic bio-filtration can be taken as an alternative process to reduce BOD.

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Waste as one of human activity products should be managed in order to minimize its negative impacts to the environment and human health. Environmental pollution will also take place due to waste which contains hazardous substances, such as used battery, accu and broken TL bulbs. Production of those goods uses plublum (Pb) in its process, so that the Pb will be carried later by the leachate flow to the environment.    This work was an experiment with pre and post tests design which also used reference group as a control towards Pb parameter. Statistical analyzes was carried out using Anova and T tests with the degree of confidence of 95%. Result of the anova test of reference group with a variation of detention time was probability of about 0.293, whereas the experimental group resulted a probability of 0.005. The T-test for both reference and experimental groups with a variation of detention timegave different values of Pb parameter where the different with the probability of 0.000.    The result showed that concentration of Pb in leachate decreased after it was treated using alum and lime. the significant reduction is at leaving time of 3 hours, i.e. 798.3 mg/L (75.7%). Therefore, it ca be concluded that treatment using alum and lime can be applied to reduce concentration of Pb in a lechate.