Triyono, Sugeng and Nirwana, Sindya and Lanya, Budianto (2016) PERFORMANCE OF A CONTINUOUS TREATMENT OF TOFU PROCESSING INDUSTRY WASTEWATER USING PHOSPHATE ROCK AS THE FILTER MEDIUM. In: Seminar Nasional Perteta Sumatra Barat, 4-6 November 2016, Univarsitas Padang Sumatra Barat.

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This study aims to evaluate the treatment efficiency of tofu industry wastewater and dissolution potential of phosphate from the 3-5 mm phosphate rock particles as the filter medium. The research was conducted by means of continuously running an up-flow lab-scale filter reactor, loaded with the wastewater at the flow rate of 0.95 liters per day, without recycle. The parameters in the research observed mostly every day included pH, total solids (TS), total suspended solids (TSS), Total filterable solids (TFS), N-ammonium, ortho phosphate (PO4 -3), and biogas production. The results showed that the pH of the wastewater increased from 3.9 to 5.5, and was supposedly affected by the lime content of the rock filter. TS, TSS, and TFS were reduced by 34%, 31% and 28% each. N-ammonium concentration increased by 382.69%, from 68.24 mg/l to 329.38 mg/l, while ortho-phosphate concentration increased by 559.78% from 77.39 mg/l to 510.63 mg/l. Biogas production averaged 678 ml/day/liter of wastewater treated. The increase of N-ammonium concentration was normal in the primary anaerobic treatment, because of microbial conversion of N organic to ammonia. The increase of phosphate concentration, in addition to the result of the conversion of organic phosphorus in the wastewater, was indication of the dissolution of PO4 -3 contained in the phosphate rock filter due to the acidic wastewater. High concentrations of TS, TSS, TFS, in the effluent were normal, indicating that the effluent needed further treatments. Phosphate and N-ammonium removal from wastewater generally needed sequencing aerobic and anaerobic treatments. Eventually nitrogen (from wastewater) and phosphorus (from wastewater and phosphate rock filter) can be harvested in the form of sludge, and utilized as fertilizer. Keywords: anaerobic, biofilters, phosphate rock, tofu wastewate

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: anaerobic, biofilters, phosphate rock, tofu wastewate
Subjects: T Technology > TD Environmental technology. Sanitary engineering
Divisions: Fakultas Pertanian (FP) > Prodi Teknik Pertanian
Depositing User: DR.Ir.M.Sc Sugeng Triyono
Date Deposited: 12 Jun 2017 02:45
Last Modified: 12 Jun 2017 02:45

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