The use of detergent in households is practiced by almost all people. These conditions make the quality of the environment, especially water bodies, more disturbed when the detergent waste disposal without prior processing. Hazard by detergent can interfere with human health such as digestive system disorders, skin irritation, and even one of the causes of cancer. The aimed of this research was to design a modified biofilter reactor to reduce levels of detergent and other organic substances in domestic wastewater. This research was a pre-experimental design research with designs used is pre-test, treatment, and post-test. The research media used were bioball because bioball has more space on its surface for bacterial growth that will form bacterial phylum, while activated carbon serves to increase efficiency in reducing levels of organic matter and to reduce the concentration of surfactants dissolved. The process is more effective if given a treatment with a process of coagulation, flocculation, and sedimentation. The results showed a decrease in detergent content from 14.56 mg/L to 0.86 mg/L (94.1%). These results indicate that the Bio Filter reactor was effective in reducing detergent levels to meet the detergent waste standard requirements based on East Java Governor Regulation No. 72/2013.

River water quality is influenced by several factors, one of then is caused by industrial waste discharged into river bodies. Effluent discharged into water bodies contains heavy metals, pungent odours, and makes the colour of water in water bodies cloudy. the purpose of the study examined the effect of tannery effluent distance on the water quality of the Gandong River in Magetan Regency. Benefits For the company As a consideration to maximize WWTP processing actions so as not to pollute the river environment. for the surrounding community to know also the consequences caused by pollution of tanning industry waste so that they are more careful in reprocessing the use of river water. This type of the reseach was observational with a cross sectional approach. A purposive sampling technique was used. The data analysis methode was a correlation test by comparing laboratory test results with Gandong River water quality standards according to PP. RI. No 82 of 2001. Parametric statistical tests using Product-Moment Correlation to determine the relationsbetweenp of distance from the tannery industry affects the water quality of the Gandong River in Magetan Regency. The results showed that the water quality of Gandong River did not meet the requirements of COD 118 mg/l and colour 61.85 TCU/PtCo, at a distance of 250 m which exceeded the quality standards of COD 133 mg/l and colour 54.90 TCU/PtCo, at a distance of 500 m which did not meet the requirements of COD 89 mg/l, at a distance of 750 m which did not meet the requirements of COD 89 mg/l. temperature and TSS parameters. The highest results at a distance of 0 m of 27˚C and 368 mg / l meet the quality standard requirements for odour obtained odorous results. From the results of the study, it can be concluded that the parameters of pH, TSS, Temperature, and Odour still meet the quality standards and the parameters of colour, COD do not meet the quality standards. Based on the Product Moment correlation analysis, the relationship between distance and river water quality shows different values for correlation results that have a relationship, namely the parameters of odour, colour, COD and results that do not have a correlation of temperature and TSS. So the farther the distance from the pollutant source, the better the river water quality.

Soponyono market is al traditional malrkelt that plays an important role in providing safe food. Also, the market can become a place of disease transmission, so it is very important to monitor and control the cleanliness or health of the market environment. Thel purpose of this research was describe the hygiene status of the Soponyono market which includes market formation, market cleanliness and market PHBS, then analyzed using SWOT analysis (strelngths, welalknelssels, opportunitiels alnd threlalts). The results of the SWOT analysis will form the market hygiene position development strategy. This research was descriptive type of research that uses observation sheets to obtain results for the sanitary conditions of the Soponyono Market. Based on the study results, thel sanitary condition in Soponyono Market, category Rungkut District, Surabaya City was generally good and in the eligiblel as per the existing regulations such as market buildings (80.6%), market cleanlinelss in the eligible category (68.1%), and clean alnd healthy behavior (59%) category requirements. The results of the SWOT anallysis on the sanitary state of the Soponyono market are in Quadrant I (Aggressive). It is recommended that market managers monitor the sanitary condition of the market in accordance with Decree 519/MENKES/SK/VI/2008 of the Minister of Health of the Republic of Indonesial relating to the implementation of healthy markets. The strategy used is to take advantage of all the strengths of the clean market conditions and to talkel advantage of opportunities as much as possible.