NOVELTY - Improving (P1) efficiency of organic food production plant, involves: preparing a feedstock of a raw harvested organic food base product; processing the prepared food base product, including heating; extracting the organic food material from the food base product, and leaving a residual waste product; feeding the waste product into a continuous process for converting carbonaceous material in the waste product into a liquid hydrocarbon product; and extracting a liquid hydrocarbon product.    USE - For improving efficiency of organic food production plant (claimed); and for the production of liquid hydrocarbon.    ADVANTAGE - The process: is more economical and effective than the prior art, e.g. produces more liquid hydrocarbons and recovering more energy from the feedstock in the liquid hydrocarbons and using less energy and using less consumables such as hydrogen and other chemical additives in the process; is more reliable, robust and less prone to fouling and clogging by tar, char, dissolved and/or suspended salts and/or inorganic materials than the prior art; is more environmentally sustainable than the prior art e.g. produces less pollutants and waste streams and/or having a smaller CO2 footprint; has a higher quality than obtained by the prior art; is simpler and less capital intensive than the prior art; allows processing of feedstock at higher dry matter contents and/or a wider range of feedstocks than in the prior art; and provides liquid hydrocarbon product derived from solid feedstocks that has relatively improved properties.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a pre-treatment (P2) for providing a feedstock for the process (M1), involving: adding at least one feedstock material with a maximum particle size of 30 mm; and adding a liquid organic compound (at least 1 wt.%);    (2) an apparatus for continuous conversion of carbonaceous material contained in at least one feedstock into a liquid hydrocarbon product, where the feedstock comprises waste material from organic food production plant, the carbonaceous material is in a feed mixture including the carbonaceous material and at least one fluid, the fluids including water, comprising: at least one feed pump for feeding the feed mixture into the processing zone; a pressurization device adapted to pressurize the feed mixture to a pressure of 50-400 bar; a heating device adapted to heat the pressurized feed mixture to a temperature of 250-500 degrees C; a conversion device adapted to hold the pressurized and heated feed mixture for a conversion time of 10-40 minutes; a cooling device adapted to cool the treated feed mixture to a temperature of 25-200 degrees C; an expansion device adapted to reduce the pressure of the treated feed mixture to a pressure of 1-70 bar; a separation device adapted to separate a liquid hydrocarbon product from the treated and successively cooled and expanded feed mixture; and unit for feeding a least part of the liquid hydrocarbon to a heat and/or power generating apparatus for use in organic food production plant;    (3) a conversion reactor, is adapted to be vertically oriented and further having a conically shaped inlet for introducing the feed mixture in the top and a conically shaped outlet in the bottom, and where the angle of the walls of the conical inlet to the centerline of the reactor is below 60 degrees , and where the angle of the walls of the conical oulet to the centerline of the reactor is below 30 degrees ;    (4) a mixing device, comprising a cyclone shaped mixing chamber adapted to be vertically positioned, is provided for the introduction of the supercritical fluids and/or oxidizing agent is performed in, and where an inlet tangential to the mixing chamber is provided for introducing the superheated supercritical fluid and/or oxidizing agent into the mixing chamber and a bottom outlet is provided for withdrawing the fully converted feed mixture from the cyclone shaped mixing chamber; and    (5) a feed mixture, comprising a feedstock with a particle size of maximum 30 mm, water and at least one liquid organic compound where concentration of the liquid organic compound contained in the feed mixture is at least 1 (preferably at least 5, more preferably at least 10, especially at least 20) wt.%.