A synergetic system for waste treatment, comprising: a waste treatment system configured to perform biological treatment of waste; a gas purification system configured to purify exhaust gas generated during the biological treatment of the waste; and a feeding system configured to feed excess heat from the gas purification system back to the waste treatment system, wherein the waste treatment system is further configured to use the fed back excess heat for the biological treatment of the waste, wherein the gas purification system is configured to purify the exhaust gas by regenerative thermal oxidation or regenerative catalytic oxidation, wherein the gas purification system comprises: a single heat-transfer bed filled with ceramic material; an electrical heater configured to initially heat the ceramic material to a predefined temperature; and a gas flow control system (370, 375, 380, 385) configured to cause the exhaust gas to flow through the heated ceramic material such that the exhaust gas heats up and oxidates while flowing through the ceramic material, wherein the ceramic material is configured to store heat released by the exhaust gas during oxidation, wherein the gas flow control system (370, 375, 380, 385) is further configured to periodically reverse a flow direction of the exhaust gas through the ceramic material, wherein the gas purification system further comprises a heat exchanger arranged in the heat-transfer bed, wherein the heat exchanger is configured to transfer heat from the ceramic material to a heat transport medium flowing through the heat exchanger, and wherein the feeding system is configured to feed the heated heat transport medium to the waste treatment system. a waste treatment system configured to perform biological treatment of waste; a gas purification system configured to purify exhaust gas generated during the biological treatment of the waste; and a feeding system configured to feed excess heat from the gas purification system back to the waste treatment system, wherein the waste treatment system is further configured to use the fed back excess heat for the biological treatment of the waste, wherein the gas purification system is configured to purify the exhaust gas by regenerative thermal oxidation or regenerative catalytic oxidation, wherein the gas purification system comprises: a single heat-transfer bed filled with ceramic material; an electrical heater configured to initially heat the ceramic material to a predefined temperature; and a gas flow control system (370, 375, 380, 385) configured to cause the exhaust gas to flow through the heated ceramic material such that the exhaust gas heats up and oxidates while flowing through the ceramic material, wherein the ceramic material is configured to store heat released by the exhaust gas during oxidation, wherein the gas flow control system (370, 375, 380, 385) is further configured to periodically reverse a flow direction of the exhaust gas through the ceramic material, wherein the gas purification system further comprises a heat exchanger arranged in the heat-transfer bed, wherein the heat exchanger is configured to transfer heat from the ceramic material to a heat transport medium flowing through the heat exchanger, and wherein the feeding system is configured to feed the heated heat transport medium to the waste treatment system. a single heat-transfer bed filled with ceramic material; an electrical heater configured to initially heat the ceramic material to a predefined temperature; and a gas flow control system (370, 375, 380, 385) configured to cause the exhaust gas to flow through the heated ceramic material such that the exhaust gas heats up and oxidates while flowing through the ceramic material, wherein the ceramic material is configured to store heat released by the exhaust gas during oxidation, wherein the gas flow control system (370, 375, 380, 385) is further configured to periodically reverse a flow direction of the exhaust gas through the ceramic material, wherein the gas purification system further comprises a heat exchanger arranged in the heat-transfer bed, wherein the heat exchanger is configured to transfer heat from the ceramic material to a heat transport medium flowing through the heat exchanger, and wherein the feeding system is configured to feed the heated heat transport medium to the waste treatment system.