Determinasi Kandungan Kadmium (Cd) Di Perairan Pantai Malalayang Sekitar Rumah Sakit Prof Kandou Manado

This research was conducted by purposive random sampling method with 3 points. Data were analyzed descriptively by comparing the environmental quality standard based on the Ministry of Environment No. 51. 2004. Results of laboratory analysis was the content of Cadmium (Cd) was still below the allowable threshold. Compared to Cd content of fresh water which was 0.0002 mg/L, the Cd content found in this research was lower that was 0.0001 mg/ L. Keywords: Kadmium (Cd), Logam berat, Baku Mutu, Pantai Malalayang, RS Prof Kandou.

The Effect Of Mining Activities On The Quality Conditions Of Fe In Wastewater At Tenggarong East Kalimantan

This study aims: to determine the quality of waste Fe in the mining and settling pond inlet, determine the trend of Fe waste at the mine site, and to determine the trend of Fe waste in processing sites in 2018. The research was carried out by coming directly to the field and then taking samples of wastewater with a ballast bottle. Data analysis method by comparing with environmental quality standards. The results showed that the quality of Fe wastewater at mine sites 1 from January to September 2018 ranged from 0.27 mg/lt to 6.45 mg/lt still below the environmental quality standard. Mine Location 2 showed that Fe content is between 1, 72 mg/lt to 62.30 mg/lt, which is above the environmental quality standard in February of 34.14 mg/lt and March 62.30 mg/lt. Whereas in mine 3 showed is the Fe content is between 0.15 mg/lt to 27 mg/lt, the level of which is above the quality standard in January February and May 2018. Whereas at the processing location 1 results from an analysis of Fe content between 0.009 mg/lt to 3, 21 mg/lt is still below the environmental quality standard. Whereas in processing area 2 between 0.07 mg/lt to 3.16 mg/lt is still below the environmental quality standard. Evaluation of the trend in the level of Fe that is striking at mining locations 1 and 2 in March 2018. Whereas at mining site 3 in February 2018.

Penurunan Kadar Amonia Limbah Cair Menggunakan Adsorben Abu Terbang Bagas di Industri Penyamakan Kulit

The incidence of odor around the waste of the tannery industry is due to the high ammonia (NH3) content of 3.79 mg/l, so to lower the high levels of ammonia (NH3) it is necessary to process. The purpose of this research is to reduce ammonia (NH3) in the wastewater of tannery industry according to environmental quality standard. The method of this study was experimental, with Pretest-Posttest with control group design comparing ammonia decrease before and after processing, with treatment variation for 2 gram of adsorbent mass; 3 grams; 4 grams and contact time of 60 minutes; 90 minutes; 120 minutes. Measurement of ammonia (NH3) using a spectrophotometer. The highest percentage of ammonia (NH3) decline was 96.83% in a 4 gram treatment variation with 120 minutes contact time, with a decrease in ammonia value of 0.12 mg/l where the environmental quality standard of East Java Governor Regulation No. 52 of 2014 Ie 0.5 mg / l, so that the results meet the environmental quality standards. The results of statistical analysis showed that the most optimum is the mass of 4 gram adsorbent with contact time of 120 minutes. Suggestions for related industries can use the results of this study in the process of decreasing levels of ammonia (NH3) and for other researchers is expected to combine with other technologies to optimize the results in reducing levels of ammonia (NH3). Keywords : Fly ash, ammonia levels of liquid waste

Effect of pH of Coagulant on the Treatment of Wastewater from Tofu Industry

Wastewater generated from the tofu industry usually still contains high organic pollutants that can contaminate the surface water. Therefore, it should be treated properly before it can be disposed to the environment. This study aims to evaluate the combination of coagulationflocculation and ultrafiltration methods in treating the wastewater from tofu industry. Based on the preliminary tests, the wastewater from tofu industry have pH, total dissolved solid (TDS), total suspended solid (TSS), turbidity and chemical oxygen demand (COD) of 3.4, 870 - 1080 mg/L, 370 mg/L, 446 FAU and 7954 mg/L, respectively. The coagulant and membrane used in this study were Poly aluminum chloride (PAC) and the ceramic membrane, respectively. Experimental results showed that the best pH for coagulation-flocculation process is at pH of 7.0, and this pH was then used for ultrafiltration process. The flux of the ultrafiltration membrane increased with increasing the trans membrane pressure due to increasing driving force. The observed parameters such as TSS and turbidity of wastewater decreased drastically after experiencing ultrafiltration process and met the National Environmental Quality Standard. However, the COD of water produced in the ultrafiltration process was still high and did not meet the National Environmental Quality Standard.