The process of fermentation of fruit waste into liquid organic fertilizer is one of the alternative organic waste processing which is effective. The purpose of this research is to assess the quality of liquid organic fertilizer products (C-organic concentration, N, P, and K) using the waste of fruit papaya and banana, and comparing it with the quality of liquid organic fertilizer according to regulation of the Minister of Agriculture number 261 years 2019 about the minimum technical requirements of organic fertilizer, biological fertilizer, and soil improvement. The fermentation process is done for 24 days with variations of raw material waste fruit that is used i.e. waste papaya and banana fruit. Biostarter used in the form of EM4 with a variation of addition as much as 30 mL and 50 mL. This research is done by duplo, so it takes 8 reactors in the form of closed plastic drums with a capacity of 2.5 liters for each reactor. The results showed that the liquid organic fertilizer produced from papaya and banana fruit has a C-
Bioremediation of bacterial algae is one of wastewater treatment by utilizing symbiosis of bacterial algae, which is relatively inexpensive and safe for the environment. The aims of this research were: (1) to investigate initial characteristic of boezem water of Kalidami Surabaya, (2) to investigate the effect of potassium (K) element and carbon source addition toward the reduction of NH3-N content and organic matter in KMnO4 of boezem water. The research conducted in a laboratory in batches without adding aeration. The initial stage of this research was conducting alga culture until it was obtained chlorophyll-a algae concentration of 3.5 ± 0.5 mg/L. The best result of range finding test was a comparison of boezem water volume with algal which were about 25%:75%. The research conducted in duplo over 18 d. The result of the research can be concluded that boezem water of Kalidami Surabaya for the parameter of pH, temperature, NH3-N, dissolved oxygen, chemical oxygen demand, biological oxygen demand, and number of KMnO4 show that it enables to do bioremediation of bacterial algae. Decrease efficiency occurred in a reactor with the addition of element K 3% and source C. NH3-N and KMnO4 final content 0.164 mg/L and 30 mg/L, respectively.
Sistem biofilter anaerobik merupakan salah satu alternatif teknologi yang dapat diaplikasikan untuk menangani limbah cairRumah Potong Ayam (RPA). Penelitian ini bertujuan untuk: 1) mengidentifikasi karakteristik limbah cair RPA dan 2) mengkaji efisiensi penyisihan kadar BOD dan COD dengan sistem biofilter anaerobik menggunakan media batu apung.Penelitian dilaksanakan selama 10 hari dengan adanya variasi volume reaktor yaitu 30 cm x 30 cm x 60 cm, 25 cm x 25 cm x 60 cm, and 20 cm x 20 cm x 60 cm. Penelitian dilaksanakan secara duplo sehingga dibutuhkan 6 buah reaktor yang terbuat dari bahan akrilik. Parameter yang diukur dalam penelitian ini adalah nilai suhu, pH, kadar BOD, dan COD limbah cair RPA. Hasil penelitian menunjukkan bahwa kadar BOD dan COD awal limbah RPA berturut-turut mempunyai nilai 1,65 mg/L dan 2,60 mg/L, dimana nilai ini melebihi baku mutu air limbah menurut Peraturan Gubernur Jatim Nomor 72 Tahun 2013 Tentang Baku Mutu Air Limbah Bagi Industri dan/ atau Kegiatan Usaha Lainnya. Penyisihan kadar BOD pada limbah cair RPA dengan menggunakan reaktor biofilter anaerobik bermedia batu apung sebesar 94%, sedangkan penyisihan kadar COD mencapai 96%.
Soil is a very influential medium of human survival. One of the parameters affecting soil quality is heavy metal concentration in soil, especially heavy metal of lead (Pb). High concentrations of Pb in the soil can treated with phytoremediation techniques. The aims of this research are: 1. To investigate the reduction of heavy metal Pb in the soil by phytoremediation, 2. To investigate the effectiveness of plants to absorb heavy metal Pb in the soil, and 3. To investigate the distribution of Pb concentration in the plant parts. The study variables used in this research are species variation of plants Sansevieria trifasciata and Celosia pulmosa. Phytoremediation test of Pb heavy metal contaminated soil was carried out for 4 weeks with sampling time on days 0, 7, 14, 21, and 28. The parameters analyzed of this research is Pb concentrations on soil and plant parts, namely roots, stems, leaf. Physical observations of plants were also carried out to support this research. The results show that the reactor with Sansevieria trifasciata had a higher effectiveness of removal of Pb in 81.08% (112 mg/kg) than Celosia pulmosa in 59.63% (293 mg/kg). The effectiveness of the absorption of Sansevieria trifasciata was higher 70.50% (418 mg/kg) than Celosia pulmosa 52.40% (311 mg/kg). The distribution of Pb concentrations in the plant of Sansevieria trifasciata and Celosia pulmosa is almost the same, with the most concentration being in the root part and at least scattered in the leaves of the plant. Keywords: Celosia pulmosa, Soil, Lead, Phytoremediation, Sanseviera trifasciata.
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