Zürcher Nachrichten - Tunisian startup turns olive waste into clean energy

EUR -
AED 4.325935
AFN 82.295246
ALL 97.926243
AMD 452.928874
ANG 2.108041
AOA 1080.157743
ARS 1459.669854
AUD 1.798908
AWG 2.12321
AZN 2.007149
BAM 1.955925
BBD 2.378252
BDT 144.489211
BGN 1.956381
BHD 0.443228
BIF 3509.023701
BMD 1.177925
BND 1.500096
BOB 8.139519
BRL 6.38271
BSD 1.177875
BTN 100.523408
BWP 15.600995
BYN 3.854646
BYR 23087.331819
BZD 2.365951
CAD 1.603098
CDF 3398.314319
CHF 0.935664
CLF 0.028547
CLP 1095.129815
CNY 8.440309
CNH 8.439249
COP 4689.39895
CRC 594.837921
CUC 1.177925
CUP 31.215015
CVE 110.27203
CZK 24.646321
DJF 209.743371
DKK 7.461454
DOP 70.494494
DZD 152.109697
EGP 58.022699
ERN 17.668876
ETB 163.469121
FJD 2.637615
FKP 0.863276
GBP 0.862601
GEL 3.204416
GGP 0.863276
GHS 12.190777
GIP 0.863276
GMD 84.22618
GNF 10215.651249
GTQ 9.056577
GYD 246.42571
HKD 9.2463
HNL 30.773962
HRK 7.536412
HTG 154.649859
HUF 399.203326
IDR 19062.0084
ILS 3.939983
IMP 0.863276
INR 101.068035
IQD 1542.998366
IRR 49620.09495
ISK 142.446936
JEP 0.863276
JMD 188.001985
JOD 0.835195
JPY 170.275556
KES 152.179701
KGS 103.010002
KHR 4732.301685
KMF 492.373101
KPW 1060.088497
KRW 1605.924627
KWD 0.359609
KYD 0.981663
KZT 611.718997
LAK 25381.61808
LBP 105536.527962
LKR 353.392529
LRD 236.165056
LSL 20.719221
LTL 3.478107
LVL 0.712516
LYD 6.344404
MAD 10.572174
MDL 19.841265
MGA 5300.337897
MKD 61.533923
MMK 2472.967489
MNT 4223.442545
MOP 9.523607
MRU 46.74898
MUR 52.948179
MVR 18.14445
MWK 2042.530211
MXN 21.952406
MYR 4.972067
MZN 75.340533
NAD 20.719221
NGN 1802.15516
NIO 43.342763
NOK 11.864468
NPR 160.837253
NZD 1.944493
OMR 0.452069
PAB 1.177875
PEN 4.176666
PGK 4.86531
PHP 66.570482
PKR 334.365716
PLN 4.243888
PYG 9386.598396
QAR 4.304974
RON 5.059075
RSD 117.187471
RUB 92.591703
RWF 1693.207942
SAR 4.416905
SBD 9.820272
SCR 16.592058
SDG 707.348348
SEK 11.256846
SGD 1.500092
SHP 0.925664
SLE 26.444855
SLL 24700.50455
SOS 673.142913
SRD 44.036774
STD 24380.6712
SVC 10.306657
SYP 15315.211479
SZL 20.70332
THB 38.118091
TJS 11.45473
TMT 4.134517
TND 3.431819
TOP 2.758823
TRY 46.955033
TTD 7.988509
TWD 34.086841
TZS 3109.79825
UAH 49.123132
UGX 4225.269361
USD 1.177925
UYU 47.273014
UZS 14790.942924
VES 128.951587
VND 30838.07893
VUV 140.323223
WST 3.056689
XAF 655.99882
XAG 0.031783
XAU 0.000353
XCD 3.183402
XDR 0.815852
XOF 655.99882
XPF 119.331742
YER 285.234989
ZAR 20.722353
ZMK 10602.74357
ZMW 28.533819
ZWL 379.291399
  • CMSC

    0.0900

    22.314

    +0.4%

  • CMSD

    0.0250

    22.285

    +0.11%

  • RBGPF

    0.0000

    69.04

    0%

  • SCS

    0.0400

    10.74

    +0.37%

  • RELX

    0.0300

    53

    +0.06%

  • RIO

    -0.1400

    59.33

    -0.24%

  • GSK

    0.1300

    41.45

    +0.31%

  • NGG

    0.2700

    71.48

    +0.38%

  • BP

    0.1750

    30.4

    +0.58%

  • BTI

    0.7150

    48.215

    +1.48%

  • BCC

    0.7900

    91.02

    +0.87%

  • JRI

    0.0200

    13.13

    +0.15%

  • VOD

    0.0100

    9.85

    +0.1%

  • BCE

    -0.0600

    22.445

    -0.27%

  • RYCEF

    0.1000

    12

    +0.83%

  • AZN

    -0.1200

    73.71

    -0.16%

Tunisian startup turns olive waste into clean energy
Tunisian startup turns olive waste into clean energy / Photo: FETHI BELAID - AFP

Tunisian startup turns olive waste into clean energy

In a northern Tunisian olive grove, Yassine Khelifi's small workshop hums as a large machine turns olive waste into a valuable energy source in a country heavily reliant on imported fuel.

Text size:

Holding a handful of compacted olive residue -- a thick paste left over from oil extraction -- Khelifi said: "This is what we need today. How can we turn something worthless into wealth?"

For generations, rural households in Tunisia have burned olive waste for cooking and heating, or used it as animal feed.

The International Olive Council estimated Tunisia will be the world's third-largest olive oil producer in 2024-2025, with an expected yield of 340,000 tonnes.

The waste generated by the oil extraction is staggering.

Khelifi, an engineer who grew up in a family of farmers, founded Bioheat in 2022 to tackle the issue. He recalled watching workers in olive mills use the olive residue as fuel.

"I always wondered how this material could burn for so long without going out," he said. "That's when I asked myself: 'Why not turn it into energy?'"

Beyond profit, Khelifi hopes his startup helps "reducing the use of firewood as the country faces deforestation and climate change".

At his workshop, employees transport truckloads of olive waste, stacking it high before feeding it into the processing machines.

The material is then compacted into cylindrical briquettes and left to dry for a month under the sun and in greenhouses before its packaging and sale.

- The soul of olives -

Khelifi began developing his idea in 2018 after he travelled across Europe searching for a machine to turn the olive paste into long-burning fuel.

Unable to find the right technology, he returned to Tunisia and spent four years experimenting with various motors and mechanical parts.

By 2021, he had developed a machine that produced briquettes with just eight-percent moisture.

He said this amount significantly reduces carbon emissions compared to firewood, which requires months of drying and often retains more than double the amount of moisture.

Bioheat found a market among Tunisian restaurants, guesthouses, and schools in underdeveloped regions, where winter temperatures at times drop below freezing.

But the majority of its production -- about 60 percent -- is set for exports to France and Canada, Khelifi said.

The company now employs 10 people and is targeting production of 600 tonnes of briquettes in 2025, he added.

Selim Sahli, 40, who runs a guesthouse, said he replaced traditional firewood with Khelifi's briquettes for heating and cooking.

"It's an eco-friendly and cost-effective alternative," he said. "It's clean, easy to use, and has reduced my heating costs by a third."

Mohamed Harrar, the owner of a pizza shop on the outskirts of Tunis, praised the briquettes for reducing smoke emissions, which he said previously irritated his neighbours.

"Besides, this waste carries the soul of Tunisian olives and gives the pizza a special flavour," he added.

- 'Protect the environment' -

Given Tunisia's significant olive oil production, waste byproducts pose both a challenge and an opportunity.

Noureddine Nasr, an agricultural and rural development expert, said around 600,000 tonnes of olive waste is produced annually.

"Harnessing this waste can protect the environment, create jobs, and generate wealth," he said.

Nasr believes repurposing olive waste could also help alleviate Tunisia's heavy dependence on imported fuel.

The country imports more than 60 percent of its energy needs, a reliance that widens its trade deficit and strains government subsidies, according to a 2023 World Bank report.

Fuel and gas shortages are common during winter, particularly in Tunisia's northwestern provinces, where households struggle to keep warm.

Redirecting agricultural waste into alternative energy sources could ease this burden.

Yet for entrepreneurs like Khelifi, launching a startup in Tunisia is fraught with challenges.

"The biggest hurdle was funding," he said, lamenting high-interest bank loans. "It felt like walking on a road full of potholes."

But now his goal is "to leave my mark as a key player in Tunisia's transition to clean energy", he added. "And hopefully, the world's, too."

T.Furrer--NZN