Publication Search

Liquid waste and solid waste originating from hospitals can function as a medium for spreading disorders or disease for staff, sufferers and the community. The research was carried out with the aim of finding out an overview of waste management at Vita Insani Hospital starting from sorting, containerization, lifting, temporary shelter, final disposal site. This research is quantitative research with an observational and descriptive approach, using descriptive research methods, the research was carried out with the aim of creating an objective picture or description of a situation at the Vita Insani Hospital, Pematangsiantar city regarding the management of solid and liquid medical waste. Research results: Overall waste processing at the Vita Insani Hospital, Pematang Siantar City is quite good, however improving the quality of processing is important regarding processing facilities and infrastructure through maintenance of each facility and infrastructure.  

Cooking oil that has been heated three times is very dangerous for human health if reused, but if it is thrown away directly it can pollute the environment, such as blockages in sewer pipes, pollution of clean water, river pollution and soil pollution. This community service activity aims to increase motivation and equip residents, especially housewives, in processing cooking oil waste, which was previously liquid waste that could pollute the environment. This service activity includes several stages, namely the service team planning, coordinating with the PKK Chair in Joyusuran Village, socializing and the process of making soap products from used cooking oil. This activity simulates processing used cooking oil into solid laundry soap as an environmentally friendly product and can reduce environmental pollution due to disposal of used cooking oil.

Red rose (Rosa damascena Mill) is one of the plant that can be easily found in Indonesia. The corolla of red roses contains natural dyes, namely anthocyanins which can be used as food coloring and the function as antioxidants or counteract free radicals. The corrola of red roses is used as a raw material in distillation of rose water. Rose water distillation poduces is a dark red liquid. This liquid waste has not been utilized optimally. Therefore, that further research is needed to determine the chemical content in it. So that the expected outcome of this research is the best chemical and sensory analysis of red rose water distillation waste based on it's antioxidant activity. The research design used a 2 factor factorial completely randomized design (CRD). The first factor is the variation of the distillation method while the second factor is the heating temperature of the red rose water waste (heated waste). The optimal treatment result was a combination of steam distillation method variations and 70°C heating temperature with following results obtained : 77,32% RSH DPPH, 61,02% FRAP value, 71,20 mg/g vitamin C, 4,58 mg  total phenol.GAE/ g, pH 4,15, anthocyanin 121,93 mg/g, brightness 27,23 (*L), red-green chromatic 7,13 (*a), blue-yellow chromatic 7,54 (*b). Sensory analysis of color was 4.36 (deep red), other scents were 2.47 (slightly sour), rose aroma was 3.64 (strong), and overall preference was 3.75 (liked).

Single Cell Protein (PST) is the term used for proteins derived from microbes such as fungi, yeasts and bacteria. One way to deal with the abundance of tofu liquid waste is by using microbiological methods, namely utilizing tofu liquid waste as a substrate for the growth of Bacillus cereus microbial growth for single cell protein production. The purpose of this study was to determine whether tofu liquid waste could produce single cell protein from B. cereus culture and to determine the difference in protein production by adding nutrients to the fermentation medium. The research method used was experimental research, with the independent variables being MFLT1 fermentation medium (Tofu Liquid Waste Fermentation Medium with the addition of KH2PO4 nutrients and sugar) and MFLT2 medium (Tofu Liquid Waste Fermentation Medium with the addition of nutrients KH2PO4; (NH4)2SO4 and sugar); and the length of fermentation on days 0, 2, 4 and 6. While the dependent variables were the analysis of protein content, cell dry weight, glucose content, pH and temperature. The result data in this study were statistically analyzed using the two way Anova method. The results of this study showed that the highest protein content was obtained in MFLT2 medium, namely 0.73% (day 4); cell dry weight 0.253 g; glucose level 1.3339%; pH 3.9 and temperature 29.2oC. Meanwhile, in MFLT1 medium, the highest protein content was 0.46% (4th day); cell dry weight 0.286 g; glucose level 1.3342%; pH 3.9 and temperature 28.8oC. From the research that has been carried out, it can be concluded that tofu liquid waste can produce single cell protein from B. cereus culture and there are differences in protein production results with the addition of nutrients, where the protein content in MFLT2 medium is higher than protein content in MFLT1 medium.

Single Cell Protein (PST) is the term used for proteins originating from microbes such as fungi, algae, yeast and bacteria. Tofu liquid waste is an alternative medium that has the easiest source of carbohydrates, so it has the potential for the growth of Saccharomyces cerevisiae. The aim of this research is to determine whether tofu liquid waste can produce single cell protein from S. cervisiae culture and to determine differences in protein production with the addition of nutrients to the fermentation medium. The research method used is experimental research. The independent variables are MFLT1 medium (Tofu Liquid Waste Fermentation Medium with the addition of KH2PO4 nutrients and sugar) and MFLT2 medium (Tofu Liquid Waste Fermentation Medium with the addition of KH2PO4 nutrients; (NH4)2SO4 and sugar); as well as fermentation time on days 0, 2, 4 and 6. The dependent variables are analysis of protein content, cell dry weight, glucose content, pH and temperature. The data from this research were analyzed statistically using the two way Anova method. The results of this research obtained the highest protein content in MFLT2 medium at 0.52% (day 2); cell dry weight 0.49 grams; glucose level 1.3345%; pH 5.0 and temperature 25.5 ⁰C. Meanwhile, in MFLT1 medium, the highest protein content was obtained at 0.35% (4th day); cell dry weight 0.363 grams; glucose level 1.3342%; pH 4.7 and temperature 28.8 ⁰C. From the research that has been carried out, it can be concluded that tofu liquid waste can produce single cell protein from S. cerevisiae cultures and there are differences in protein production results with the addition of nutrients to the medium, where the results of the protein content in the MFLT2 medium are higher than the protein content in the MFLT1 medium.

The production of clothing produced by the textile industry cannot be separated from the use of dyes. The dyes that have been used of course become waste which can have an impact on the damage to the water ecosystem if they do not go through a waste treatment process. This research discusses the extent to which law enforcement has been carried out regarding the behavior of the textile industry which disposes of its clothing dye liquid waste haphazardly when viewed from statutory regulations. In this research the author uses normative legal research methods using legal sources from primary legal materials in the form of environmental law legislation and secondary legal materials in the form of books and articles regarding waste management. The conclusion obtained in this paper is that liquid textile dye waste is a dangerous waste that can damage the condition of water and river environments if its disposal is not based on the provisions of applicable laws and regulations.

The fabric printing industry makes a major contribution to various kinds of textile products, its by-products, liquid waste, require special attention in environmental management. Most of the liquid waste originating from the fabric printing industry consists of dyes, solvents and other processing chemicals. To prevent negative effects on water quality and the surrounding environment, managing this waste is very important. To achieve sustainability, advances in liquid waste processing technology are very important. The solution to reduce the impact of liquid waste from the fabric printing industry is an advanced purification process. PT. X to reduce polutan parameter such BOD, COD , TSS, Ammonia and Total Colidform by. 90%, 95%, 95%, 85%, 20%, 90% And meets the specified quality standards. Because the pH parameters still meet existing quality standards, processing is focused on reducing the organic parameters which are quite high. The results of the process will be used again for flushing activities in green open spaces and for washing operational vehicles.

Research has been carried out on the use of wood sawdust as an adsorbent for ikat weaving liquid waste. This research aims to determine the effect of using wood sawdust as an adsorbent on ikat weaving liquid waste. This research was carried out at the IKIP Muhammadiyah Maumere Laboratory and the Maumere Health Service Laboratory. The sample in this study was ikat woven liquid waste which was divided into four treatments, namely Control (K) and the other three were treatments (P1, P2, P3) with the addition of 1,2 and 3 grams of activated charcoal. The method in this research is an experimental method with the research design being True Experimental in the form of Posttest Only Control Group Design. The characteristic tests in this research include a water content test with a value of 0.0833%, and a yield test with a value of 1.9634%. The test parameters used include the degree of acidity (pH), Manganese (Mn) content test and organoleptic test. The research results showed that the pH value before contact with activated charcoal was 9.63 (alkaline pH), and after contact with activated charcoal at a dose of 3.0 grams the pH value became 8.01 (alkaline pH). In testing Mn levels before contact with activated charcoal, the value was 4.60 mg/l and after adding 1.0 grams, 2.0 grams and 3.0 grams of activated charcoal, there was a decrease in Manganese levels respectively, namely from 3 mg/l. , 2.78 mg/l and 1.83 mg/l. Furthermore, for the organoleptic test, there was a change in the color of the ikat woven liquid waste from initially black to clear yellow. Thus, it can be concluded that the addition of activated charcoal from sawdust can have an effect on ikat weaving liquid waste.

The existence of the cosmetics industry basically has a positive impact but also creates new problems because there is still inadequate management of liquid waste. The aim of the study was to find out how the coagulation and flocculation processes affect the quality of BOD, COD, and TSS in wastewater treatment plants. This research method uses a qualitative type method, based on its type with a cross sectional approach with an observational researchhmethode. The populationnof this study is the outlet of the Wastewater Treatment Plant which has undergone coagulation and flocculation processes. The samples used were outlets after the coagulation and flocculation processes were carried out at the WWTP in Cosmetic Industry X, Depok City. The results from the inlet levels of BOD 2,152 mg/l, COD 5,380 mg/l, and TSS 1,830 mg/l. The outlet levels of the Cosmetic Industry X Wastewater Treatment Installation in Depok City showed a BOD level of 15 mg/l, a COD level of 63 mg/l, and a TSS of 20 mg/l. In this study the contents of BOD, COD and TSS in cosmetic industry waste X in Depok city were included in the water quality status with good quality after coagulation and flocculation processes.