: Decreased Levels BOD, COD and TSS Waste Of Tahu Using Effective Microorganism-4 (EM4) In Aerobic. Wastewater was generated from industry tahu still contains levels of polluters such as BOD, COD and TSS are still high that can pollute waterways, Therefore it must be lowered levels before discharge into waterways. One way to do is wastewater treatment with EM4. This type of research was a quasi experiments aimed to determine the reduced levels of BOD, COD and TSS waste of tahu with wastewater treatment using the activator Effective Microorganism-4 (EM4) in aerobic with variation concentrations of 0%, 3%, 5%, 7% and retention time of 72 hours, 144 hours, 216 hours. The results showed the highest decrease levels wastewater concentration treatment of 7% EM4 with retention time of 216 hours with a BOD value 399,9 mg/L (88,8%), COD 1355,2 mg/L (85,3%) and TSS 287 mg/L (72,7%). Data analysis used two-way anova in the treatment group EM4 concentration and retention time obtained p value = 0.000 and α = 0.05 the results showed that there were significant differences due to variations in the concentration of EM4, due to the retention time and due to the effects of interactions EM4 concentration with retention time. The treatment results still exceeded the quality standard so before doing aerobic treatment, the first can do anaerobic treatment, so that wastewater treatment is getting better effluent. Keywords: Waste of tahu; levels of BOD; COD;TSS; EM4; retention time.
Effect Of Addition Bio-Activator EM-4 (Effective microorganism) And Mol (Microorganism Local) Casserole Rice On Timing Of Compost. Composting is the decomposition of organic matter into simple materials is done naturally with the help of microorganisms , but the composting process that occurs naturally long and slow so indispensable ingredient bioactive able to accelerate the composting process. The help of a solution of EM - 4 (Effective microorganism) and MOL (Local Microorganisms) rice casserole that can be accelerated < 2 months . This study aims to determine differences in the addition of EM - 4 bio-activator (Effective Microrganism) with MOL (Micro Organism Local) Rice Casserole to the time of the compost. The method used in this study is experimental which has been experimenting with the observed variables such as time of compost from each - each treatment well control , EM - 4 as well as the addition of a solution MOL stale rice. Then after the data collected will be followed by a test using a One Way Analisys of Variance , the provisions of P value < alpha (0.05). The results showed that the value of p < alpha (0.05) . So there is the effect of the time difference with the help of compost activator EM-4/MOL rice. Then the three treatments of the fastest time of the end of the composting process is treatment with the addition of a solution of the stale rice MOL (15 days). Based on the results of the study can be recommended to accelerate the composting time can be used activator in the form of EM - 4 or with the help of a solution-based MOL stale rice. Keywords: Compost; EM – 4; MOL Rice Basi; Time Occurrence Compost.
Level of Noise in the residential around muara teweh’s PLTD. Muara Teweh’s PLTD was one of the regional companied responsible for the provision of electricity serviced. The impact of the operation of the PLTD is the emergence of noise caused by the PLTD engine so that it appeared on public complainted, especially communication disordered, disordered of physiological and psychological disordered. This study aims to determine the noise level and subjective complainted felt in residential areas around Muara Teweh’s PLTD. This research was a descriptive observational describe the noise level in residential areas Muara Teweh’s PLTD. This study include cross-sectional design that aims to determine the noise until at residential areas around Muara Teweh’s PLTD and connect with public complainted in residential areas around Muara Teweh’s PLTD. The measurement resulted show noise levels in residential areas around Muara Teweh’s PLTD exceeded the NAV according KEPMEN / LH / 48/1996, which is 62.9 dBA in the North, 70.4 dBA in the Northeast, 69.3 dBA in the East , 69.4 dBA in the direction of the Southeast, 72.3 dBA in the south, 72.2 dBA in the direction of the Southwest, 78.2 in the West and 75.5 dBA in the northwest. Subjective complainted of the most widely felt in residential areas Muara Teweh’s PLTD form (45.9%), headache (56.8%), discomfort (91.9%), insomnia (83.8%) fast and emotions (40.5%). Efforts should be madeto controlnoise levelsand complaintsaregiving them the toolsnoise suppressioninengine room, thickenthe barrier, put upcurtainsat thewindows of the houseanddo notoftenopen thedoor. Keywords : Noisy environment, residential noise
Ventilation is the process of exchanging clean air from outside into the room. Good ventilation is able to ensure smooth air circulation. This study aims to determine the relationship of air adequacy with comfort in room space. This research is an analytic study with cross sectional approach. The sample of this study was 30 rooms that used natural ventilation systems. The air change time is calculated from the volume of the room, the height and area of the ventilator, as well as the difference in the temperature of the outside and indoor air. Adequacy of air available with the air needed by its inhabitants. Objective comfort is based on the difference between outside and inside room temperature, and subjectively based on the room occupant's perspective. The results showed as many as 87% of the rooms had no air turnover time and as many as 20% of the rooms had insufficient air. Objectively stated rooms are uncomfortable as much as 57%, but subjectively reaching 77%. Statistically there is a significant relationship between air adequacy with comfort in the room objectively (p = 0.024). It can be concluded that the adequacy of the air represented by the ventilation system is related to the comfort of the air in the room space, to create a comfortable and healthy room space. Future research is expected to consider and include other factors that affect the ventilation system such as the layout of the furniture, the position of the ventilation, and the characteristics of the building so that research on comfort is more objective.
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