Pada saat intensitas hujan tinggi, Desa Bohar terutama di RW 9 mengalami genanngan air dan masyarakat belum memanfaatkan sampah organik rumah tangga secara optimal. Untuk menanggulangi genangan air hujan dan sampah organik salah satu alternatif dengan menggunakan lubang resapan biopori (LRB). Kegiatan pengabdian kepada masyarakat ini bertujuan untuk memberikan pengetahuan, ketrampilan, dan kesadaran kepada masyarakat tentang pembuatan dan manfaat LRB. Metode pelaksanaan pengabdian diawali dari survey lokasi, penyuluhan dan praktek pembuatan LRB, dan monitoring serta evaluasi. Hasil dari kegiatan ini adalah masyarakat memperoleh, pengetahuan dan kertampilan serta kesadaran membuat LRB; membangun 20 buah LRB; LRB mengurangi genangan air terutama pada saat hujan dengan intensitas hujan tinggi; sampah organik dari rumah tangga diolah menajdi kompos dengan dimasukan ke dalam LRB

Tofu industry waste pollution is still a serious problem. The high burden of tofu industrial waste pollutants is still a major problem. besides, the unavailability of the budget for processing and the limitations of a cheap and efficient treatment system are factors supporting the pollution of tofu waste in the environment. This study examines the efficiency of reducing BOD5 and COD treated with constructed wetlands using water jasmine plants (Enchinodorus palaefolius). The system used is the wetland subsurface with continuous flow. The media used include sand and biochar with a residence time of 12 hours 18 hours. Whereas pH, temperature, and flow rate are conditioned as control variables. The greatest efficiency of BOD5 and COD occurs in reactors using biochar media and a residence time of 18 hours with an efficiency of BOD5 of 50.52% and COD of 55.02%.

Tofu industrial wastewater is a contributor to environmental pollution. Wastewater contains high levels of COD and TSS. The purpose of this study was to determine the effectiveness of reducing pollutant loads in tofu liquid waste by using the phytoremediation method using water jasmine (Echinodorus Palaefolius). The initial stage of the research was a preliminary test to determine the initial content of the waste. The acclimatization process is carried out by observing the process of plant growth during the research process. To maximize plant growth, dilution is carried out with various concentrations of 25% wastewater with 75% diluting water and 50% wastewater with 50% diluting water. Sampling was carried out every 12 hours for 5 days. The results showed that the highest effectiveness of COD reduction occurred in RFT 25% with a residence time of 12 hours at 39.83%, while for TSS parameters the highest effectiveness was at RFT 25% with a residence time of 12 hours by 69%.

The problem that arises in Berbek Village, Waru District, Sidoarjo Regency is that the community has not carried out waste management properly. Garbage is simply thrown into a Temporary Waste Disposal Site (TPS) or burned even though there is a Trash Bank. The purpose of implementing Community Service is training and outreach to the people of Berbek village to be able to sort waste, recognize the types of waste that have economic value so that they can be cached at the Waste Bank and the residue that can enter TPST / TPA. Service implementation methods: socialization, training and hands-on practice. The results obtained by the community members carry out waste sorting and deposit dry waste to the Trash Bank.

Tujuan penelitian adalah untuk mengetahui pengaruh pengaplikasian eco enzyme terhadap kadar surfaktan, nitrogen dalam bentuk ammonia, nitrit dan nitrat serta phospat pada air limbah domestik.   Penelitian dilakukan dengan cara  mencampurkan eco enzim dengan konsentrasi 0 % (R1),  10% (R2), 20% (R3) dan 25% (R4).  Pengambilan sampel pada hari ke -0, ke-3, ke-6, ke-9, ke12 dan ke-15. Hasil penelitian menunjukkan, konsentrasi eco enzim yang paling efektif untuk menurunkan kadar adalah pada konsentrasi 25 %. Kadar surfaktan turun sebanyak 0,77%, kadar nitrit turun sebanyak 0,79 % , kadar nitrat turun sebanyak 0,85 %, kadar amonia turun sebanyak 0,96% dan kadar phospat turun sebesar 0,92%. Secara keseluruhan penurunan belum memenuhi baku mutu yang sesuai dengan Lampiran III Peraturan Gubernur Jawa Timur Nomor 72 Tahun 2013 untuk Limbah Domestik di Pemukiman.