Life Cycle Assessment

1. You want to decide whether to use a plastic or paper bag at the supermarket. The plastic bag weighs 40 g with a capacity of 9 L, and you estimate you will use it twice on average (reuse one additional time after the first use). The paper bag weighs 30 g with a capacity of 6 L and cannot be reused. Determine the FU, assuming the bags carry their maximum load. Determine the reference flows and key parameters linkinh the reference flows to the FU for the two scenarios, assuming manufacturing and disposal are negligible.

Jawaban:

Product or System	Functional Unit	Reference Flow	Key Parameter
Skenario 1: Tas plastik	Membawa barang dengan volume 18 liter	-          1 tas plastik (40 gram) -          2 kali pakai	-          Kapasitas maksimum -          Banyaknya tas yang dipakai
Skenario 2: Tas kertas		-          3 tas kertas (3 x 30 gram = 90 gram) -          1 kali pakai

2. Use LCA to compare the use of paper towels in a public restroom with that of a hot-air dryer.

- Describe the function and any secondary functions of the system.

- Choose an FU that represents the function of the system.

- For each case, list the reference flows and key parameters corresponding to the selected FU.

- System boundary

 

Jawaban:

Product or System	Function	Secondary Function	Functional Unit	Reference Flow	Key Parametres	Key Parameter
Skenario 1: Hot – Air Hand Dryer	Pengering tangan	-          Penghangat tangan -          Pengering pakaian	Pengering tangan selama 20 tahun	-          Umur alat 20 tahun -          Berat alat 12 kg -          1800W untuk pemakaian 30 detik	-          Umur alat -          Berat alat -          Daya sekali pakai -          Berat tissue yang digunakan per sekali pakai	-          Jarak transport sama untuk semua skenario -          Penggunaan untuk sekali mengeringkan tangan
Skenario 2: Paper towel		-          Menyeka wajah		-          Umur alat 10 tahun (perlu 2 alat) -          Berat 2 alat (3 x 2 = 6 kg) -          Pemakaian sekali pakai 3,58 gram

3. Use LCA to compare the use of paper towels in a public restroom with that of a hot-air dryer.

- Describe the function and any secondary functions of the system.

- Choose an FU that represents the function of the system.

- For each case, list the reference flows and key parameters corresponding to the selected FU.

- System boundary

Jawaban:

Product or System	Function	Secondary Function	Functional Unit	Reference Flow	Key Parametres	Key Parameter
Skenario 1: Popok Clodi	Melindungi organ vital reproduksi	-	Penggunaan selama sehari (24 jam)	-          3 pcs / hari -          Berkali – kali pakai	-          Banyaknya popok yang digunakan dalam sehari -          Kapasitas penggunaan	-          Jarak transport sama untuk semua skenario -          Penggunaan popok dalam sehari -          Penggunaan popok pada bayi baru lahir (newborn)
Skenario 2: Popok Pospak (Sekali pakai)				-          7 pcs / hari -          1 kali pakai