<strong>Aim:</strong> This study aims to observe the potential implementation of analytical methods based on digital image processing as an alternative method of colorimetric analysis that can be implemented in site. <strong>Methodology and Results:</strong> Pt-Co standard series solutions at concentrations of 5, 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100 concentration units (CU) were measured by spectrophotometric method and digitally enhanced colorimetric (DEC) method to obtain a response in the form of absorbance (Abs) and area under curve (AUC) value. Absorbance measurement was carried out at 317.5 nm (λ max). The AUC value was obtained from the 3-point RGB value measurements, made average so that a color band is produced, then quantified by translating the color band intensity into the response curve in ImageJ software. The Abs and AUC values of artificial samples are processed into CU values with linear equations resulting from linear regression test. The results of the calculation of CU values from the two measurement methods were tested using independent t test method to examine significant differences between the two measurement methods. <strong>Conclusion, significance and impact study:</strong> Coefficient of determination (R2) plot CU VS AUC = 0.8638, in independent t test was obtained p-value = 0.4246 at the 95% confidence level. Therefore, it can be concluded that digitally enhanced colorimetric could be used to determine water quality, especially color parameter in site measurement.

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Aim: This study aims to determine whether the application of eco enzyme affects the industrial waste activated sludge degradation and to compare the effects of eco enzyme made from oranges and tomatoes. Methodology and results: The experiments were done on the laboratory scale for 12 days by applying 10% of eco enzyme in the sludge samples. It showed both tomatoes and oranges eco enzymes can decrease the pH from 6.9 to 4.7 compared to control which was stable at 6.9. The reduction of COD, TSS, and VSS by tomato eco enzyme applications were 61%, 39% 41% respectively compared to by orange eco enzyme application that showed a higher reduction of 78%, 45%, 46% respectively. The control samples also show the reduction of COD, TSS, and VSS by 21%, 23%, 30% respectively. The reduction of organic content in the control samples of sludge (8.9%) was higher than the samples with eco enzyme (3.5%). Conclusion, significance, and impact study: The results showed that eco enzyme application significant statistically affected reduction of pH, COD, organic content, but not significant statistically on TSS and VSS reductions. Comparing the application of orange and tomatoes eco enzyme did not show the significant different treatment.

Environmental pollution is one of the factors causing environmental damage. The environment can accept a certain level of pollutant load and can neutralize it within a certain period. But along with the development of human activities, the amount and level of pollutants are increasing inversely with the capacity of the environment and the ability of the environment to neutralize pollutants. One of the factors causing environmental pollution is domestic wastewater. This research uses orange waste to be processed into the eco enzyme. Making eco enzyme lasts for 3 months. Eco enzyme is made using orange waste, brown sugar, water in a ratio of 3:1:10, and fermentation time is 3 months. This study aims to determine whether the eco-enzyme of orange waste can be used to reduce the concentration of detergent in domestic wastewater. The method used in this research is an experimental method with a laboratory scale. From the experiments carried out, primary data will be obtained. Based on the eco-enzyme characterization of orange waste used, it is known that the concentration of detergent is 0.2534 mg/L. The concentration of detergent in domestic waste is 2.1464 mg/L. The concentration of detergent in domestic waste after added eco-enzyme of orange waste 5% becomes 0.68 mg/L and 10% becomes 0.30 mg/L with a detention time of 7 days.

Biological-aerobic process is a technology that is often chosen to treat wastewater in industrial areas, especially industries related to food industries. Compared to chemical treatment and advanced treatment, biological treatment is relatively more efficient in the costs required. However, in conventional biological treatment the amount of energy consumption in the process is a major cost component that it becomes one of the challenges in implementing this technology. This paper contains a review of the implementation of the Food Chain Reactor (FCR) technology in treating industrial area wastewater, focusing on an overview of energy consumption compared to conventional biological-aerobic treatment of oxidation ditch (OD). FCR is a wastewater treatment plant (IPAL) that combines Integrated Fixed Film Activated Sludge (IFAS) technology and technology that resembles Constructed Wetland, thus enabling the simultaneous physical, biological and biochemical treatment processes within the reactor. In this case study, the implementation succeeded in showing a reduction in energy consumption by 46.4% while maintaining an efficiency decrease in BOD by 83% and efficiency in decreasing ammonia by 82%. As with the OD process, in this FCR study showed that the denitrification process has not been successful.

Environmental management in industrial estate is the strategic policy model which is needed to be developed referring to the Indonesian Government Decree number 24 year 2009, that state almost all of the new industrial developments should be located in industrial estate. The complexity in this environmental management was approached by "green rating" of PROPER's criteria regulated by Ministry of Environment & Forestry (KLHK). PROPER is the assessment program of company performance rating in environmental management. Green rating is classified by PROPER in terms of beyond compliance performance. The result of the case study in Jababeka Industrial Estate (KIJA) Bekasi, based on its environmental situational analysis year 2014 by multidimensional scaling (MDS) method, showed that only the management dimension had a sustainability performance. The results of prospective analysis on leverage factors of MDS showed that the key factors of the environmental management model were (1) DRKPL (summary document of environmental management performance), (2) implementation of water conservation and reducing water pollution program, (3)funding for water conservation, (4) monitoring and evaluation of community development program, (5) implementation of 3R (reduce, reuse, recycle) programs of hazardous waste, (6) technology of 3R, and (7) benchmarking. Based on the key parameters and referred to the possibilities conditions, three scenarios have been developed to approach the implementative policy. The moderate scenario was recommended to be the right policy in term of consideration of technology, funding availability, time of implementation and organization skills.

Environmental management in industrial estate is the strategic policy model which is needed to be developed referring to the Indonesian Government Decree number 24 year 2009, that state almost all of the new industrial developments should be located in industrial estate. The complexity in this environmental management was approached by "green rating" of PROPER's criteria regulated by Ministry of Environment & Forestry (KLHK). PROPER is the assessment program of company performance rating in environmental management. Green rating is classified by PROPER in terms of beyond compliance performance. The result of the case study in Jababeka Industrial Estate (KIJA) Bekasi, based on its environmental situational analysis year 2014 by multidimensional scaling (MDS) method, showed that only the management dimension had a sustainability performance. The results of prospective analysis on leverage factors of MDS showed that the key factors of the environmental management model were (1) DRKPL (summary document of environmental management performance), (2) implementation of water conservation and reducing water pollution program, (3)funding for water conservation, (4) monitoring and evaluation of community development program, (5) implementation of 3R (reduce, reuse, recycle) programs of hazardous waste, (6) technology of 3R, and (7) benchmarking. Based on the key parameters and referred to the possibilities conditions, three scenarios have been developed to approach the implementative policy. The moderate scenario was recommended to be the right policy in term of consideration of technology, funding availability, time of implementation and organization skills.