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Siti Wahyuningsih

Balai Penelitian dan Pengembangan Teknologi Serat Tanaman Hutan

Author-ID : 2486176

Agriculture, Biological Sciences & Forestry

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Articles

BIODEGRADATION OF PULP SLUDGE BY Phanerochaete chrysosporium, Penicillium oxalicum and Penicillium citrinum AFTER SIX MONTHS INCUBATION Siti Wahyuningsih
Indonesian Journal of Forestry Research Vol 6, No 2 (2019): Indonesian Journal of Forestry Research
Publisher : Secretariat of Agency for Standardization of Environment and Forestry Instruments

The rise of pulp and paper production due to market’s demand will also increase both main and secondary products of pulp. Secondary products such as pulp sludge have low economic value, but high environmental cost. Therefore it needs improved technology input to raise its value. This study aims to evaluate the ability of Phanerochaete chrysosporium, a combination of Penicillium citrinum and P. oxalicum and a mixture of those three fungal species in decomposing pulp sludge after one and six months incubation. The pulp sludge was collected from pulp company in North Sumatera, Indonesia and it was pre-treated prior to composting. The composting was conducted by inoculating P. chrysosporium, a combination of P. oxalicum and P. citrinum or a mixture of those fungal species with a density of 107 spores/ml into 15 kg treated sludge. The inoculated sludge was then incubated for one and six months. Analysis was held for the non-inoculated and inoculated sludge regarding pH, cation exchange capacity (CEC) (me/100 g), macronutrients (N, P, K, Ca and Mg) (%), micronutrients (S, Zn) (ppm) and heavy metals (Pb, Cd) (ppm). After one month incubation, P. chrysosporium was leading in enhancing sludge’s macro and micronutrients. After six months incubation, a combination of P. oxalicum and P. citrinum generated higher P, K, CEC and reduced lead content of the sludge. Meanwhile, a mixture of the three fungus species produced the highest N and Mg.

Comparison of pulp sludge compost effectivity of three different decomposers to the growth of geronggang (Cratoxylon arborescens) seedlings Siti Wahyuningsih; Agus Winarsih; Lolia Santi
Jurnal Penelitian Kehutanan Wallacea Vol. 10 No. 2 (2021)
Publisher : Foresty Faculty of Hasanuddin University

Pulp residue from liquid waste processing is suitable for compost materials, except for its high CN ratioso it needs composting to reduce the CN ratio. Geronggang is a nativepeat swamp species suitable for peat rehabilitation. The study aims to test pulp sludge compost quality enriched with three different decomposersto the growth of geronggang (Cratoxylum arborescens)seedlings. The sludge composting was incubated for a monthusing threespecies of decomposers, i.e., Phanerochaete chrysosporium(C); Penicillium citrinumand Penicillium oxalicum (CO); P. chrysosporium, P. citrinumand P. oxalicum (CCO). The compost is weighed and placed around the seedling's roots area with varies dosages equal to2, 4, 6, 8, 10, 12, 14,and 16 ton ha-1. The height and diameter of the seedlings were recorded for six months. Data was examined using ANOVA followed with DMRT at a 5% significance. The sludge compost in this study has CN ratio, Total N (%), P2O5(%) and K2O (%) about 40.22-44.5; 1.04-1.11; 1.05-1.13; 1.05-1.13, respectively. Statistically, the height increment of seedlings after the sludge compost application enriched with the CO was different from the CCO. However, the seedling's height rise was not statistically different at the dosages variation treatment. The raise of seedlings diameter after CO treatment at a dosage equal to 6 and 12 tonha-1was significantly different to the CCO at a dosage equal to 12 ton ha-1. However, the rise of seedling's diameter was not significantly different at decomposers' variation treatment.The future study can be aimed to gain compost that meets the national standard.

EFFECT OF PULP SLUDGE COMPOST VS. MANURE FERTILIZER APPLICATION TO THE GROWTH OF GERONGGANG (Cratoxylum arborescens) SEEDLINGS IN PEAT SOIL Siti Wahyuningsih
Indonesian Journal of Forestry Research Vol. 10 No. 2 (2023): Indonesian Journal of Forestry Research
Publisher : APTKLHI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59465/ijfr.2023.10.2.135-149

The pulp industry is crucial for Indonesia, but the waste produced should be managed. Pulp sludge contains organic matter suitable for compost material. This study examines the response of geronggang (Cratoxylum arborescens) seedlings' growth to the application of pulp sludge compost compared to commercial manure fertilizer and non-fertilized soil for six months. A fifteen kg of pulp sludge (water content of 60-70%) mixed with decomposers (Penicillium citrinum and Penicillium oxalicum (107 spores/mL)) was incubated for a month. The compost or fertilizer at a dosage of 0, 2, 4, 6, 8, 10, 12, 14, and 16 (tons/ha) was added to peat soil for the seedlings' growing media. The manure fertilizer contained higher macronutrients than the sludge compost, while the peat was considered poor soil. Seedlings with sludge compost or manure fertilizer addition at a dosage equal to 2 (tons/ha) showed the highest survival rate after six months. The sludge compost addition raised the seedling's height, diameter, and dry weight more than another treatment. The sludge compost at a dosage equal to 16 and 12 (tons/ha) significantly increased the height and diameter of the seedlings, respectively. The sludge compost has shrink-swell characteristics that are potent water retention in dry soil.

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