Liquid waste generated from cattle farms is discharged directly into culvert and river. The liquid waste is not treated so it has high potential to threaten and pollute the water and ground water environment. With the average flushing done twice a day, the gross amount of wastewater that is wasted is not less than 100-150 liters/day/cattle for weight 400 kg (Saputro et al. 2014). Therefore a wastewater treatment plant (WWTP) is needed to control the massive liquid waste. In addition, WWTP must be simple, inexpensive, and appropriate so that the community can apply it. Data collection is needed, namely data on the number of cattle livestock, waste water quality data and waste water discharge data. The organic parameters of cattle waste that are considered are BOD, COD, TSS, NH3-N, and pH only (Regulation of the State Minister for the Environment Number 11 Year 2009 concerning Wastewater Quality Standards for Cattle and Pork Businesses and/or Activities). Design for wastewater treatment plants (WWTP) model using the MSL (Multi Soil Layering) method (Alternative 1) and the combination of MSL with anaerobic wasps nest biofilter (Alternative 2) (Said et al. 2001). Compare the effluent results in the both alternatives that available the quality standards and analyze more optimally.

Di Kabupaten Malang khususnya Desa Petungsewu, belum terdapat satu pun Instalasi Pengolahan Air Limbah (IPAL) yang secara spesifik mengolah limbah cair peternakan. Maka dari itu penelitian ini bertujuan untuk mencari model IPAL yang paling efektif untuk mengolah limbah cair peternakan sapi. Berlokasi di Desa Petungsewu, sebuah peternakan dengan sapi berjumlah 14 ekor. Limbah cair yangdihasilkan mencapai 1,071 m3/hari. Kualitas air limbah menggunakan parameter yang mengacu ke Peraturan Menteri Lingkungan Hidup (Permen. LHK) Nomor 11 Tahun 2009 yakni BOD, COD, TSS, NH3-N, dan pH. Setelah uji laboratorium, masingmasing nilainya sebesar 64,27 mg/l; 201,4 mg/l; 100,1 mg/l; 66,02 mg/l; dan 8,35. Berdasarkan data kuantitas dan kualitas air limbah di atas, dilakukan pendekatan metode IPAL menggunakan 3 alternatif yakni filtrasi, biofilter anaerob, dan metode kombinasi. Masing-masing alternatif mencapai efisiensi pengurangan efluen hingga 92,26%. Rencana Anggaran Biaya (RAB) untuk operasional dan bangunan IPAL adalah Rp13.702.933.