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Neni Damajanti

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Author-ID : 2659742

Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology

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PENGARUH NUTRISI BAKTERI Pseudomonas sp DALAM ROTATING BIOLOGICAL CONTACTOR (RBC) TERHADAP KANDUNGAN BOD DAN COD AIR LIMBAH KILANG PARAXYLENE Ganda Kurniawan; Neni Damajanti; Alwani Hamad
Sainteks Vol 11, No 1 (2014): SAINTEKS
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/sainteks.v11i1.203

Air Limbah pabrik perminyakan adalah air yang masih mengandung sedikit minyak, suspended solid, BOD dan COD yang relative masih tinggi. Penelitian ini bertujuan memperoleh hasil analisa air limbah outlet Rotating Biological Contactor (RBC) yang memenuhi standar KEP. 09 / MENLH/4/1997 khususnya kandungan BOD dan COD .Proses reduksi BOD dan COD terjadi di rotating biological contactor (RBC) oleh bakteri Pseudomonas. Pada penelitian ini digunakan variabel tetap flow rate air limbah 7 m3/jam, kecepatan putaran RBC 2,12 rpm sedangkan variable berubahnya adalah injeksi urea (1,1.1,1.2 kg/day) dan phospat (0.2,0.3,0.4 kg/day) kedalam RBC. Air limbah outlet RBC dianalisa setiap hari dengan metode API method 728-53. Dari hasil penelitian diketahui bahwa terjadi penurunan BOD dan COD di air limbah setelah diinjeksi urea dan phospat di RBC. Injeksi yang memberikan hasil terbaik dalam penelitian ini adalah urea 1.2 kg dan phospat 0.4 kg, untuk BOD terjadi penurunan dari rata-rata 166 ppm menjadi 97 ppm, untuk COD terjadi penurunan rata-rata 272 ppm menjadi 198 ppm. Kata kunci: Rotating Biological Contactor, BOD, COD, Urea, Phospat

KAJIAN SIFAT FISIK FILM TIPIS NATA DE SOYA SEBAGAI MEMBRAN ULTRAFILTRASI Endar Puspawiningtiyas; Neni Damajanti
Techno (Jurnal Fakultas Teknik, Universitas Muhammadiyah Purwokerto) Vol 12, No 1 (2011): Techno Volume 12 No 1 April 2011
Publisher : Universitas Muhammadiyah Purwokerto

“Whey” is one of liquid waste water that was produced from tofu making process. There are many research that process whey to waste water that ready to dispose. One of whey utilization to product that more useful is as of nata making raw material, that often called nata de soya. The contain of nata is cellulose (Bergenia,1982). Cellulose that produced via fermentation process by bacteria often called microbial cellulose. Based of physic and chemical properties that owned by microbial cellulose, be required a study about possibility nata de soya as separated membrane especially ultrafiltration membrane. The Goal of this research are to study about influence of NaOH and H2SO4 concentration to density, swelling degree, water flux, nata de soya membrane rejection. The result of this research show that NaOH and H2SO4 treatment influence to phisical and chemical properties of nata de soya thin layer. Greatest density and smallest swelling degree are 0,94gr/cm3 and 210% at NaOH 6 % treatment. Greatest density and smallest swelling degree are 0,92gr/cm3 and 216% at H2SO4 8 % treatment. Flux value generated at several NaOH concentration average 18,89 Lm-2jam-1bar-1. By Murder (1996), ultrafiltration membrane has operational presure range 1.0 – 5.0 bar and water flux 10 -50 Lm-2jam-1bar-1, thus flux test result show that nata de soya thin layer adequate as ultrafiltration membrane. Smallest water flux value is obtained at NaOH 6 % concentration is 15.68 Lm-2jam-1bar-1. Fluctuating graph at influence of NaOH concentration to rejection coefficient has not been able to conclude best treatment to obtain maximum rejection coefficient, but overall average rejection coefficient at NaOH treatment to nata de soya thin layer is 47,6%. Keyword : ultrafiltration membrane, nata de soya

Reduction of Chemical Oxygen Demand (COD) and Total Suspended Solids (TSS) from Wastewater of Tapioca Plant Using Aluminium Sulfate and Poly Aluminium Chloride (PAC) as a Coagulant neni damajanti
Research in Chemical Engineering Vol. 1 No. 1 (2022): March
Publisher : Universitas Muhammadiyah Purwokerto

Water is the source of life on the surface of the earth. But often the water used for life contains many organic compounds that are harmful to life. This is due to contamination of water sources by compounds from many places, one of which is waste from the tapioca industry. One method that can be used to reduce water pollution is the coagulation process using certain coagulants. The ability of Poly Aluminium Chloride (PAC) and aluminum sulfate as coagulant is utilized in the processing of tapioca wastewater to reduce COD and TSS levels. This study aims to determine the effect of coagulant dose and flocculation time on decreasing COD and TSS levels in tapioca wastewater from Purbalingga Aci Factory. The method used is coagulation using PAC and aluminum sulfate as a coagulant with a variation of the coagulant dose of 2000; 4000; 6000; 8000 and 10,000 mg/L as well as variations in flocculation time 25; 30; 35; 40 and 45 minutes. The results showed that the coagulant dose and flocculation time had an effect on decreasing COD and TSS in tapioca wastewater. The best use of PAC coagulant at a dose of 6000 mg/L with a flocculation time of 45 minutes, namely the COD value of 375.2 mg/L and TSS 110 mg/L. While the best use of aluminum sulfate coagulant at a dose of 8000 mg/L with a flocculation time of 45 minutes, namely the COD value of 203.2 mg/L and TSS 590 mg/L

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