Cleaner production: a case study of Kaveh paper mill

Figures & data

Figure 1 A hierarchy model of CP implementation.

Table 1 Local and global criteria and sub-criteria of all CP elements.

Elements	Local weight	Global weight	Elements	Local weight	Global weight
A1 product modification	0.123	0.123	A2.4 change technology	0.258	0.058
A1.1 product high-yield varieties of paperboard	0.654	0.080	A2.4.1 modify pulping process	0.288	0.022
A1.1.1 testliner paperboard	0.589	0.047	A2.4.2 modifying washing and dewatering, e.g. by using twin-wire belt press	0.274	0.021
A1.1.2 white top line paperboard	0.411	0.033	A2.4.3 use vacuum drum shower	0.190	0.015
A1.2 product unbleached instead of bleached paper	0.346	0.043	A2.4.4 modify Krofta process^a	0.248	0.019
A2 process change	0.302	0.302	A3 good maintenance	0.249	0.249
A2.1 input material change	0.324	0.98	A3.1 repair all leaks	0.468	0.117
A2.1.1 using better and standard raw material	0.410	0.040	A3.2 keep taps closed when not in use	0.103	0.026
A2.1.2 kind of retention aids	0.268	0.026	A3.3 remove blockage in wire and felt showers	0.170	0.042
A2.1.3 kind of process aids	0.195	0.019	A3.4 modification and repair of dryer cylinder	0.258	0.64
A2.1.4 law of input raw material to product line	0.127	0.012	A4 recycling	0.158	0.158
A2.1.4.1 FIFO	0.714	0.009	A4.1 creating useful byproducts	0.555	0.88
A2.1.4.2 LIFO	0.286	0.004	A4.1.1 use waste fibre	0.305	0.027
A2.2 process control	0.228	0.069	A4.1.2 use raw material as fuel in boiler	0.248	0.021
A2.2.1 optimum and proper refining	0.384	0.026	A4.1.3 use rejects of cleaners	0.233	0.020
A2.2.2 refined at the highest possible pulp consistency	0.123	0.009	A4.1.4 use remaining material in Krofta (like sludge…)	0.220	0.019
A2.2.3 install calibrator equipment	0.372	0.026	A4.2 one-site recovery and reuse	0.445	0.070
A2.2.4 control of water pressure in the edge of cutting paper	0.120	0.008	A4.2.1 recycle steam condensed	0.504	0.036
A2.3 equipment modification	0.190	0.058	A4.2.2 recycle fibre in white water	0.250	0.018
A2.3.1 install efficient shower	0.236	0.014	A4.2.3 recycle peak water in Krofta	0.246	0.017
A2.3.2 provide broke pulper	0.146	0.008	A5 manpower	0.168	0.168
A2.3.3 install consistency regulator	0.280	0.016	A5.1 engineering and educational technicians	0.391	0.066
A2.3.4 use pump of adequate	0.180	0.010	A5.2 experienced workers	0.261	0.044
A2.3.5 install pressure gauges for water consumption control	0.157	0.009	A5.3 professional and technician in the CP	0.348	0.058
^a Trade name for dissolved air flotation technology for wastewater treatment and fibre fines recovery.

Table 2 Ranking of global weights of criteria and sub-criteria.

Ranking	Global weight
Criteria
1 A2	0.302
2 A3	0.249
3 A5	0.168
4 A4	0.158
5 A1	0.123
Sub-criteria
1 A3.1	0.117
2 A5.1	0.066
3 A3.4	0.064
4 A5.3	0.058
5 A1.1.1	0.047
6 A5.2	0.044
7 A1.2	0.043
8 A3.3	0.042
9 A2.1.1	0.040
10 A4.2.1	0.036
11 A1.1.2	0.033
12 A4.1.1	0.027
13 A2.1.2	0.026
14 A2.2.1	0.026
15 A2.2.3	0.026
16 A3.2	0.026
17 A2.4.1	0.022
18 A2.4.2	0.021
19 A4.1.2	0.021
20 A4.1.3	0.020
21 A2.1.3	0.019
22 A2.4.4	0.019
23 A4.1.4	0.019
24 A4.2.2	0.018
25 A4.2.3	0.017
26 A2.3.3	0.016
27 A2.4.3	0.015
28 A2.3.1	0.014
29 A2.3.4	0.010
30 A2.1.4.1	0.009
31 A2.2.2	0.009
32 A2.3.5	0.009
33 A2.2.4	0.008
34 A2.3.2	0.008
35 A2.1.4.2	0.004